text: /*
   * NTDLL directory and file functions
   *
   * Copyright 1993 Erik Bos
   * Copyright 2003 Eric Pouech
   * Copyright 1996, 2004 Alexandre Julliard
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
   */
  
  #if 0
  #pragma makedep unix
  #endif
  
  #include "config.h"
  #include "wine/port.h"
  
  #include <assert.h>
  #include <sys/types.h>
  #include <dirent.h>
  #include <errno.h>
  #include <fcntl.h>
  #include <stdarg.h>
  #include <string.h>
  #include <stdlib.h>
  #include <stdio.h>
  #include <libgen.h>
  #include <limits.h>
  #ifdef HAVE_MNTENT_H
  #include <mntent.h>
  #endif
  #ifdef HAVE_POLL_H
  #include <poll.h>
  #endif
  #ifdef HAVE_SYS_STAT_H
  # include <sys/stat.h>
  #endif
  #ifdef HAVE_SYS_STATVFS_H
  # include <sys/statvfs.h>
  #endif
  #ifdef HAVE_SYS_SYSCALL_H
  # include <sys/syscall.h>
  #endif
  #ifdef HAVE_SYS_SOCKET_H
  #include <sys/socket.h>
  #endif
  #ifdef HAVE_SYS_TIME_H
  # include <sys/time.h>
  #endif
  #ifdef HAVE_SYS_ATTR_H
  #include <sys/attr.h>
  #endif
  #ifdef MAJOR_IN_MKDEV
  # include <sys/mkdev.h>
  #elif defined(MAJOR_IN_SYSMACROS)
  # include <sys/sysmacros.h>
  #endif
  #ifdef HAVE_SYS_VNODE_H
  # ifdef HAVE_STDINT_H
  # include <stdint.h>  /* needed for kfreebsd */
  # endif
  /* Work around a conflict with Solaris' system list defined in sys/list.h. */
  #define list SYSLIST
  #define list_next SYSLIST_NEXT
  #define list_prev SYSLIST_PREV
  #define list_head SYSLIST_HEAD
  #define list_tail SYSLIST_TAIL
  #define list_move_tail SYSLIST_MOVE_TAIL
  #define list_remove SYSLIST_REMOVE
  #include <sys/vnode.h>
  #undef list
  #undef list_next
  #undef list_prev
  #undef list_head
  #undef list_tail
  #undef list_move_tail
  #undef list_remove
  #endif
  #ifdef HAVE_SYS_IOCTL_H
  #include <sys/ioctl.h>
  #endif
  #ifdef HAVE_LINUX_IOCTL_H
  #include <linux/ioctl.h>
  #endif
  #ifdef HAVE_LINUX_MAJOR_H
  # include <linux/major.h>
  #endif
  #ifdef HAVE_SYS_PARAM_H
  #include <sys/param.h>
  #endif
  #ifdef HAVE_SYS_MOUNT_H
  #include <sys/mount.h>
  #endif
  #ifdef HAVE_SYS_STATFS_H
  #include <sys/statfs.h>
  #endif
  #include <time.h>
  #ifdef HAVE_UNISTD_H
  # include <unistd.h>
  #endif
  
  #include "ntstatus.h"
  #define WIN32_NO_STATUS
  #define NONAMELESSUNION
  #include "windef.h"
  #include "winnt.h"
  #include "winioctl.h"
  #include "winternl.h"
  #include "ddk/ntddk.h"
  #include "ddk/ntddser.h"
  #include "ddk/wdm.h"
  #define WINE_MOUNTMGR_EXTENSIONS
  #include "ddk/mountmgr.h"
  #include "wine/server.h"
  #include "wine/list.h"
  #include "wine/debug.h"
  #include "unix_private.h"
  #include "ntifs.h"
  
  WINE_DEFAULT_DEBUG_CHANNEL(file);
  WINE_DECLARE_DEBUG_CHANNEL(winediag);
  
  #define MAX_DOS_DRIVES 26
  
  #define FILE_WRITE_TO_END_OF_FILE      ((LONGLONG)-1)
  #define FILE_USE_FILE_POINTER_POSITION ((LONGLONG)-2)
  
  /* just in case... */
  #undef VFAT_IOCTL_READDIR_BOTH
  #undef EXT2_IOC_GETFLAGS
  #undef EXT4_CASEFOLD_FL
  
  #ifdef linux
  
  /* We want the real kernel dirent structure, not the libc one */
  typedef struct
  {
      long d_ino;
      long d_off;
      unsigned short d_reclen;
      char d_name[256];
  } KERNEL_DIRENT;
  
  /* Define the VFAT ioctl to get both short and long file names */
  #define VFAT_IOCTL_READDIR_BOTH  _IOR('r', 1, KERNEL_DIRENT [2] )
  
  /* Define the ext2 ioctl for handling extra attributes */
  #define EXT2_IOC_GETFLAGS _IOR('f', 1, long)
  
  /* Case-insensitivity attribute */
  #define EXT4_CASEFOLD_FL 0x40000000
  
  #ifndef O_DIRECTORY
  # define O_DIRECTORY 0200000 /* must be directory */
  #endif
  
  #ifndef AT_NO_AUTOMOUNT
  #define AT_NO_AUTOMOUNT 0x800
  #endif
  
  #endif  /* linux */
  
  #define IS_SEPARATOR(ch)   ((ch) == '\\' || (ch) == '/')
  
  #define INVALID_NT_CHARS   '*','?','<','>','|','"'
  #define INVALID_DOS_CHARS  INVALID_NT_CHARS,'+','=',',',';','[',']',' ','\345'
  
  #define MAX_DIR_ENTRY_LEN 255  /* max length of a directory entry in chars */
  
  #define MAX_IGNORED_FILES 4
  
  struct file_identity
  {
      dev_t dev;
      ino_t ino;
  };
  
  static struct file_identity ignored_files[MAX_IGNORED_FILES];
  static unsigned int ignored_files_count;
  
  union file_directory_info
  {
      ULONG                              next;
      FILE_DIRECTORY_INFORMATION         dir;
      FILE_BOTH_DIRECTORY_INFORMATION    both;
      FILE_FULL_DIRECTORY_INFORMATION    full;
      FILE_ID_BOTH_DIRECTORY_INFORMATION id_both;
      FILE_ID_FULL_DIRECTORY_INFORMATION id_full;
      FILE_ID_GLOBAL_TX_DIR_INFORMATION  id_tx;
      FILE_NAMES_INFORMATION             names;
  };
  
  struct dir_data_buffer
  {
      struct dir_data_buffer *next;    /* next buffer in the list */
      unsigned int            size;    /* total size of the buffer */
      unsigned int            pos;     /* current position in the buffer */
      char                    data[1];
  };
  
  struct dir_data_names
  {
      const WCHAR *long_name;          /* long file name in Unicode */
      const WCHAR *short_name;         /* short file name in Unicode */
      const char  *unix_name;          /* Unix file name in host encoding */
  };
  
  struct dir_data
  {
      unsigned int            size;    /* size of the names array */
      unsigned int            count;   /* count of used entries in the names array */
      unsigned int            pos;     /* current reading position in the names array */
      struct file_identity    id;      /* directory file identity */
      struct dir_data_names  *names;   /* directory file names */
      struct dir_data_buffer *buffer;  /* head of data buffers list */
  };
  
  static const unsigned int dir_data_buffer_initial_size = 4096;
  static const unsigned int dir_data_cache_initial_size  = 256;
  static const unsigned int dir_data_names_initial_size  = 64;
  
  static struct dir_data **dir_data_cache;
  static unsigned int dir_data_cache_size;
  
  static BOOL show_dot_files;
  static mode_t start_umask;
  
  /* at some point we may want to allow Winelib apps to set this */
  static const BOOL is_case_sensitive = FALSE;
  
  static struct file_identity windir;
  
  static pthread_mutex_t dir_mutex = PTHREAD_MUTEX_INITIALIZER;
  static pthread_mutex_t mnt_mutex = PTHREAD_MUTEX_INITIALIZER;
  
  /* check if a given Unicode char is OK in a DOS short name */
  static inline BOOL is_invalid_dos_char( WCHAR ch )
  {
      static const WCHAR invalid_chars[] = { INVALID_DOS_CHARS,'~','.',0 };
      if (ch > 0x7f) return TRUE;
      return wcschr( invalid_chars, ch ) != NULL;
  }
  
  /* check if the device can be a mounted volume */
  static inline BOOL is_valid_mounted_device( const struct stat *st )
  {
  #if defined(linux) || defined(__sun__)
      return S_ISBLK( st->st_mode );
  #else
      /* disks are char devices on *BSD */
      return S_ISCHR( st->st_mode );
  #endif
  }
  
  static inline void ignore_file( const char *name )
  {
      struct stat st;
      assert( ignored_files_count < MAX_IGNORED_FILES );
      if (!stat( name, &st ))
      {
          ignored_files[ignored_files_count].dev = st.st_dev;
          ignored_files[ignored_files_count].ino = st.st_ino;
          ignored_files_count++;
      }
  }
  
  static inline BOOL is_same_file( const struct file_identity *file, const struct stat *st )
  {
      return st->st_dev == file->dev && st->st_ino == file->ino;
  }
  
  static inline BOOL is_ignored_file( const struct stat *st )
  {
      unsigned int i;
  
      for (i = 0; i < ignored_files_count; i++)
          if (is_same_file( &ignored_files[i], st )) return TRUE;
      return FALSE;
  }
  
  static inline unsigned int dir_info_align( unsigned int len )
  {
      return (len + 7) & ~7;
  }
  
  static inline unsigned int dir_info_size( FILE_INFORMATION_CLASS class, unsigned int len )
  {
      switch (class)
      {
      case FileDirectoryInformation:
          return offsetof( FILE_DIRECTORY_INFORMATION, FileName[len] );
      case FileBothDirectoryInformation:
          return offsetof( FILE_BOTH_DIRECTORY_INFORMATION, FileName[len] );
      case FileFullDirectoryInformation:
          return offsetof( FILE_FULL_DIRECTORY_INFORMATION, FileName[len] );
      case FileIdBothDirectoryInformation:
          return offsetof( FILE_ID_BOTH_DIRECTORY_INFORMATION, FileName[len] );
      case FileIdFullDirectoryInformation:
          return offsetof( FILE_ID_FULL_DIRECTORY_INFORMATION, FileName[len] );
      case FileIdGlobalTxDirectoryInformation:
          return offsetof( FILE_ID_GLOBAL_TX_DIR_INFORMATION, FileName[len] );
      case FileNamesInformation:
          return offsetof( FILE_NAMES_INFORMATION, FileName[len] );
      default:
          assert(0);
          return 0;
      }
  }
  
  static inline BOOL has_wildcard( const UNICODE_STRING *mask )
  {
      int i;
  
      if (!mask) return TRUE;
      for (i = 0; i < mask->Length / sizeof(WCHAR); i++)
          if (mask->Buffer[i] == '*' || mask->Buffer[i] == '?') return TRUE;
      return FALSE;
  }
  
  NTSTATUS errno_to_status( int err )
  {
      TRACE( "errno = %d\n", err );
      switch (err)
      {
      case EAGAIN:    return STATUS_SHARING_VIOLATION;
      case EBADF:     return STATUS_INVALID_HANDLE;
      case EBUSY:     return STATUS_DEVICE_BUSY;
      case ENOSPC:    return STATUS_DISK_FULL;
      case EPERM:
      case EROFS:
      case EACCES:    return STATUS_ACCESS_DENIED;
      case ENOTDIR:   return STATUS_OBJECT_PATH_NOT_FOUND;
      case ENOENT:    return STATUS_OBJECT_NAME_NOT_FOUND;
      case EISDIR:    return STATUS_FILE_IS_A_DIRECTORY;
      case EMFILE:
      case ENFILE:    return STATUS_TOO_MANY_OPENED_FILES;
      case EINVAL:    return STATUS_INVALID_PARAMETER;
      case ENOTEMPTY: return STATUS_DIRECTORY_NOT_EMPTY;
      case EPIPE:     return STATUS_PIPE_DISCONNECTED;
      case EIO:       return STATUS_DEVICE_NOT_READY;
  #ifdef ENOMEDIUM
      case ENOMEDIUM: return STATUS_NO_MEDIA_IN_DEVICE;
  #endif
      case ENXIO:     return STATUS_NO_SUCH_DEVICE;
      case ENOTTY:
      case EOPNOTSUPP:return STATUS_NOT_SUPPORTED;
      case ECONNRESET:return STATUS_PIPE_DISCONNECTED;
      case EFAULT:    return STATUS_ACCESS_VIOLATION;
      case ESPIPE:    return STATUS_ILLEGAL_FUNCTION;
      case ELOOP:     return STATUS_REPARSE_POINT_NOT_RESOLVED;
  #ifdef ETIME /* Missing on FreeBSD */
      case ETIME:     return STATUS_IO_TIMEOUT;
  #endif
      case ENOEXEC:   /* ?? */
      case EEXIST:    /* ?? */
      default:
          FIXME( "Converting errno %d to STATUS_UNSUCCESSFUL\n", err );
          return STATUS_UNSUCCESSFUL;
      }
  }
  
  /* get space from the current directory data buffer, allocating a new one if necessary */
  static void *get_dir_data_space( struct dir_data *data, unsigned int size )
  {
      struct dir_data_buffer *buffer = data->buffer;
      void *ret;
  
      if (!buffer || size > buffer->size - buffer->pos)
      {
          unsigned int new_size = buffer ? buffer->size * 2 : dir_data_buffer_initial_size;
          if (new_size < size) new_size = size;
          if (!(buffer = malloc( offsetof( struct dir_data_buffer, data[new_size] ) ))) return NULL;
          buffer->pos  = 0;
          buffer->size = new_size;
          buffer->next = data->buffer;
          data->buffer = buffer;
      }
      ret = buffer->data + buffer->pos;
      buffer->pos += size;
      return ret;
  }
  
  /* add a string to the directory data buffer */
  static const char *add_dir_data_nameA( struct dir_data *data, const char *name )
  {
      /* keep buffer data WCHAR-aligned */
      char *ptr = get_dir_data_space( data, (strlen( name ) + sizeof(WCHAR)) & ~(sizeof(WCHAR) - 1) );
      if (ptr) strcpy( ptr, name );
      return ptr;
  }
  
  /* add a Unicode string to the directory data buffer */
  static const WCHAR *add_dir_data_nameW( struct dir_data *data, const WCHAR *name )
  {
      WCHAR *ptr = get_dir_data_space( data, (wcslen( name ) + 1) * sizeof(WCHAR) );
      if (ptr) wcscpy( ptr, name );
      return ptr;
  }
  
  /* add an entry to the directory names array */
  static BOOL add_dir_data_names( struct dir_data *data, const WCHAR *long_name,
                                  const WCHAR *short_name, const char *unix_name )
  {
      static const WCHAR empty[1];
      struct dir_data_names *names = data->names;
  
      if (data->count >= data->size)
      {
          unsigned int new_size = max( data->size * 2, dir_data_names_initial_size );
  
          if (!(names = realloc( names, new_size * sizeof(*names) ))) return FALSE;
          data->size  = new_size;
          data->names = names;
      }
  
      if (short_name[0])
      {
          if (!(names[data->count].short_name = add_dir_data_nameW( data, short_name ))) return FALSE;
      }
      else names[data->count].short_name = empty;
  
      if (!(names[data->count].long_name = add_dir_data_nameW( data, long_name ))) return FALSE;
      if (!(names[data->count].unix_name = add_dir_data_nameA( data, unix_name ))) return FALSE;
      data->count++;
      return TRUE;
  }
  
  /* free the complete directory data structure */
  static void free_dir_data( struct dir_data *data )
  {
      struct dir_data_buffer *buffer, *next;
  
      if (!data) return;
  
      for (buffer = data->buffer; buffer; buffer = next)
      {
          next = buffer->next;
          free( buffer );
      }
      free( data->names );
      free( data );
  }
  
  
  /* support for a directory queue for filesystem searches */
  
  struct dir_name
  {
      struct list entry;
      char name[1];
  };
  
  static struct list dir_queue = LIST_INIT( dir_queue );
  
  static NTSTATUS add_dir_to_queue( const char *name )
  {
      int len = strlen( name ) + 1;
      struct dir_name *dir = malloc( offsetof( struct dir_name, name[len] ));
      if (!dir) return STATUS_NO_MEMORY;
      strcpy( dir->name, name );
      list_add_tail( &dir_queue, &dir->entry );
      return STATUS_SUCCESS;
  }
  
  static NTSTATUS next_dir_in_queue( char *name )
  {
      struct list *head = list_head( &dir_queue );
      if (head)
      {
          struct dir_name *dir = LIST_ENTRY( head, struct dir_name, entry );
          strcpy( name, dir->name );
          list_remove( &dir->entry );
          free( dir );
          return STATUS_SUCCESS;
      }
      return STATUS_OBJECT_NAME_NOT_FOUND;
  }
  
  static void flush_dir_queue(void)
  {
      struct list *head;
  
      while ((head = list_head( &dir_queue )))
      {
          struct dir_name *dir = LIST_ENTRY( head, struct dir_name, entry );
          list_remove( &dir->entry );
          free( dir );
      }
  }
  
  
  #ifdef __ANDROID__
  
  static char *unescape_field( char *str )
  {
      char *in, *out;
  
      for (in = out = str; *in; in++, out++)
      {
          *out = *in;
          if (in[0] == '\\')
          {
              if (in[1] == '\\')
              {
                  out[0] = '\\';
                  in++;
              }
              else if (in[1] == '0' && in[2] == '4' && in[3] == '0')
              {
                  out[0] = ' ';
                  in += 3;
              }
              else if (in[1] == '0' && in[2] == '1' && in[3] == '1')
              {
                  out[0] = '\t';
                  in += 3;
              }
              else if (in[1] == '0' && in[2] == '1' && in[3] == '2')
              {
                  out[0] = '\n';
                  in += 3;
              }
              else if (in[1] == '1' && in[2] == '3' && in[3] == '4')
              {
                  out[0] = '\\';
                  in += 3;
              }
          }
      }
      *out = '\0';
  
      return str;
  }
  
  static inline char *get_field( char **str )
  {
      char *ret;
  
      ret = strsep( str, " \t" );
      if (*str) *str += strspn( *str, " \t" );
  
      return ret;
  }
  /************************************************************************
   *                    getmntent_replacement
   *
   * getmntent replacement for Android.
   *
   * NB returned static buffer is not thread safe; protect with mnt_mutex.
   */
  static struct mntent *getmntent_replacement( FILE *f )
  {
      static struct mntent entry;
      static char buf[4096];
      char *p, *start;
  
      do
      {
          if (!fgets( buf, sizeof(buf), f )) return NULL;
          p = strchr( buf, '\n' );
          if (p) *p = '\0';
          else /* Partially unread line, move file ptr to end */
          {
              char tmp[1024];
              while (fgets( tmp, sizeof(tmp), f ))
                  if (strchr( tmp, '\n' )) break;
          }
          start = buf + strspn( buf, " \t" );
      } while (start[0] == '\0' || start[0] == '#');
  
      p = get_field( &start );
      entry.mnt_fsname = p ? unescape_field( p ) : (char *)"";
  
      p = get_field( &start );
      entry.mnt_dir = p ? unescape_field( p ) : (char *)"";
  
      p = get_field( &start );
      entry.mnt_type = p ? unescape_field( p ) : (char *)"";
  
      p = get_field( &start );
      entry.mnt_opts = p ? unescape_field( p ) : (char *)"";
  
      p = get_field( &start );
      entry.mnt_freq = p ? atoi(p) : 0;
  
      p = get_field( &start );
      entry.mnt_passno = p ? atoi(p) : 0;
  
      return &entry;
  }
  #define getmntent getmntent_replacement
  #endif
  
  /***********************************************************************
   *           parse_mount_entries
   *
   * Parse mount entries looking for a given device. Helper for get_default_drive_device.
   */
  
  #ifdef sun
  #include <sys/vfstab.h>
  static char *parse_vfstab_entries( FILE *f, dev_t dev, ino_t ino)
  {
      struct vfstab entry;
      struct stat st;
      char *device;
  
      while (! getvfsent( f, &entry ))
      {
          /* don't even bother stat'ing network mounts, there's no meaningful device anyway */
          if (!strcmp( entry.vfs_fstype, "nfs" ) ||
              !strcmp( entry.vfs_fstype, "smbfs" ) ||
              !strcmp( entry.vfs_fstype, "ncpfs" )) continue;
  
          if (stat( entry.vfs_mountp, &st ) == -1) continue;
          if (st.st_dev != dev || st.st_ino != ino) continue;
          if (!strcmp( entry.vfs_fstype, "fd" ))
          {
              if ((device = strstr( entry.vfs_mntopts, "dev=" )))
              {
                  char *p = strchr( device + 4, ',' );
                  if (p) *p = 0;
                  return device + 4;
              }
          }
          else
              return entry.vfs_special;
      }
      return NULL;
  }
  #endif
  
  #ifdef linux
  static char *parse_mount_entries( FILE *f, dev_t dev, ino_t ino )
  {
      struct mntent *entry;
      struct stat st;
      char *device;
  
      while ((entry = getmntent( f )))
      {
          /* don't even bother stat'ing network mounts, there's no meaningful device anyway */
          if (!strcmp( entry->mnt_type, "nfs" ) ||
              !strcmp( entry->mnt_type, "cifs" ) ||
              !strcmp( entry->mnt_type, "smbfs" ) ||
              !strcmp( entry->mnt_type, "ncpfs" )) continue;
  
          if (stat( entry->mnt_dir, &st ) == -1) continue;
          if (st.st_dev != dev || st.st_ino != ino) continue;
          if (!strcmp( entry->mnt_type, "supermount" ))
          {
              if ((device = strstr( entry->mnt_opts, "dev=" )))
              {
                  char *p = strchr( device + 4, ',' );
                  if (p) *p = 0;
                  return device + 4;
              }
          }
          else if (!stat( entry->mnt_fsname, &st ) && S_ISREG(st.st_mode))
          {
              /* if device is a regular file check for a loop mount */
              if ((device = strstr( entry->mnt_opts, "loop=" )))
              {
                  char *p = strchr( device + 5, ',' );
                  if (p) *p = 0;
                  return device + 5;
              }
          }
          else
              return entry->mnt_fsname;
      }
      return NULL;
  }
  #endif
  
  #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
  #include <fstab.h>
  static char *parse_mount_entries( FILE *f, dev_t dev, ino_t ino )
  {
      struct fstab *entry;
      struct stat st;
  
      while ((entry = getfsent()))
      {
          /* don't even bother stat'ing network mounts, there's no meaningful device anyway */
          if (!strcmp( entry->fs_vfstype, "nfs" ) ||
              !strcmp( entry->fs_vfstype, "smbfs" ) ||
              !strcmp( entry->fs_vfstype, "ncpfs" )) continue;
  
          if (stat( entry->fs_file, &st ) == -1) continue;
          if (st.st_dev != dev || st.st_ino != ino) continue;
          return entry->fs_spec;
      }
      return NULL;
  }
  #endif
  
  #ifdef sun
  #include <sys/mnttab.h>
  static char *parse_mount_entries( FILE *f, dev_t dev, ino_t ino )
  {
      struct mnttab entry;
      struct stat st;
      char *device;
  
  
      while (( ! getmntent( f, &entry) ))
      {
          /* don't even bother stat'ing network mounts, there's no meaningful device anyway */
          if (!strcmp( entry.mnt_fstype, "nfs" ) ||
              !strcmp( entry.mnt_fstype, "smbfs" ) ||
              !strcmp( entry.mnt_fstype, "ncpfs" )) continue;
  
          if (stat( entry.mnt_mountp, &st ) == -1) continue;
          if (st.st_dev != dev || st.st_ino != ino) continue;
          if (!strcmp( entry.mnt_fstype, "fd" ))
          {
              if ((device = strstr( entry.mnt_mntopts, "dev=" )))
              {
                  char *p = strchr( device + 4, ',' );
                  if (p) *p = 0;
                  return device + 4;
              }
          }
          else
              return entry.mnt_special;
      }
      return NULL;
  }
  #endif
  
  /***********************************************************************
   *           get_default_drive_device
   *
   * Return the default device to use for a given drive mount point.
   */
  static char *get_default_drive_device( const char *root )
  {
      char *ret = NULL;
  
  #ifdef linux
      FILE *f;
      char *device = NULL;
      int fd, res = -1;
      struct stat st;
  
      /* try to open it first to force it to get mounted */
      if ((fd = open( root, O_RDONLY | O_DIRECTORY )) != -1)
      {
          res = fstat( fd, &st );
          close( fd );
      }
      /* now try normal stat just in case */
      if (res == -1) res = stat( root, &st );
      if (res == -1) return NULL;
  
      pthread_mutex_lock( &mnt_mutex );
  
  #ifdef __ANDROID__
      if ((f = fopen( "/proc/mounts", "r" )))
      {
          device = parse_mount_entries( f, st.st_dev, st.st_ino );
          fclose( f );
      }
  #else
      if ((f = fopen( "/etc/mtab", "r" )))
      {
          device = parse_mount_entries( f, st.st_dev, st.st_ino );
          fclose( f );
      }
      /* look through fstab too in case it's not mounted (for instance if it's an audio CD) */
      if (!device && (f = fopen( "/etc/fstab", "r" )))
      {
          device = parse_mount_entries( f, st.st_dev, st.st_ino );
          fclose( f );
      }
  #endif
      if (device) ret = strdup( device );
      pthread_mutex_unlock( &mnt_mutex );
  
  #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__ ) || defined(__DragonFly__)
      char *device = NULL;
      int fd, res = -1;
      struct stat st;
  
      /* try to open it first to force it to get mounted */
      if ((fd = open( root, O_RDONLY )) != -1)
      {
          res = fstat( fd, &st );
          close( fd );
      }
      /* now try normal stat just in case */
      if (res == -1) res = stat( root, &st );
      if (res == -1) return NULL;
  
      pthread_mutex_lock( &mnt_mutex );
  
      /* The FreeBSD parse_mount_entries doesn't require a file argument, so just
       * pass NULL.  Leave the argument in for symmetry.
       */
      device = parse_mount_entries( NULL, st.st_dev, st.st_ino );
      if (device) ret = strdup( device );
      pthread_mutex_unlock( &mnt_mutex );
  
  #elif defined( sun )
      FILE *f;
      char *device = NULL;
      int fd, res = -1;
      struct stat st;
  
      /* try to open it first to force it to get mounted */
      if ((fd = open( root, O_RDONLY )) != -1)
      {
          res = fstat( fd, &st );
          close( fd );
      }
      /* now try normal stat just in case */
      if (res == -1) res = stat( root, &st );
      if (res == -1) return NULL;
  
      pthread_mutex_lock( &mnt_mutex );
  
      if ((f = fopen( "/etc/mnttab", "r" )))
      {
          device = parse_mount_entries( f, st.st_dev, st.st_ino);
          fclose( f );
      }
      /* look through fstab too in case it's not mounted (for instance if it's an audio CD) */
      if (!device && (f = fopen( "/etc/vfstab", "r" )))
      {
          device = parse_vfstab_entries( f, st.st_dev, st.st_ino );
          fclose( f );
      }
      if (device) ret = strdup( device );
      pthread_mutex_unlock( &mnt_mutex );
  
  #elif defined(__APPLE__)
      struct statfs *mntStat;
      struct stat st;
      int i;
      int mntSize;
      dev_t dev;
      ino_t ino;
      static const char path_bsd_device[] = "/dev/disk";
      int res;
  
      res = stat( root, &st );
      if (res == -1) return NULL;
  
      dev = st.st_dev;
      ino = st.st_ino;
  
      pthread_mutex_lock( &mnt_mutex );
  
      mntSize = getmntinfo(&mntStat, MNT_NOWAIT);
  
      for (i = 0; i < mntSize && !ret; i++)
      {
          if (stat(mntStat[i].f_mntonname, &st ) == -1) continue;
          if (st.st_dev != dev || st.st_ino != ino) continue;
  
          /* FIXME add support for mounted network drive */
          if ( strncmp(mntStat[i].f_mntfromname, path_bsd_device, strlen(path_bsd_device)) == 0)
          {
              /* set return value to the corresponding raw BSD node */
              ret = malloc( strlen(mntStat[i].f_mntfromname) + 2 /* 2 : r and \0 */ );
              if (ret)
              {
                  strcpy(ret, "/dev/r");
                  strcat(ret, mntStat[i].f_mntfromname+sizeof("/dev/")-1);
              }
          }
      }
      pthread_mutex_unlock( &mnt_mutex );
  #else
      static int warned;
      if (!warned++) FIXME( "auto detection of DOS devices not supported on this platform\n" );
  #endif
      return ret;
  }
  
  
  /***********************************************************************
   *           get_device_mount_point
   *
   * Return the current mount point for a device.
   */
  static char *get_device_mount_point( dev_t dev )
  {
      char *ret = NULL;
  
  #ifdef linux
      FILE *f;
  
      pthread_mutex_lock( &mnt_mutex );
  
  #ifdef __ANDROID__
      if ((f = fopen( "/proc/mounts", "r" )))
  #else
      if ((f = fopen( "/etc/mtab", "r" )))
  #endif
      {
          struct mntent *entry;
          struct stat st;
          char *p, *device;
  
          while ((entry = getmntent( f )))
          {
              /* don't even bother stat'ing network mounts, there's no meaningful device anyway */
              if (!strcmp( entry->mnt_type, "nfs" ) ||
                  !strcmp( entry->mnt_type, "cifs" ) ||
                  !strcmp( entry->mnt_type, "smbfs" ) ||
                  !strcmp( entry->mnt_type, "ncpfs" )) continue;
  
              if (!strcmp( entry->mnt_type, "supermount" ))
              {
                  if ((device = strstr( entry->mnt_opts, "dev=" )))
                  {
                      device += 4;
                      if ((p = strchr( device, ',' ))) *p = 0;
                  }
              }
              else if (!stat( entry->mnt_fsname, &st ) && S_ISREG(st.st_mode))
              {
                  /* if device is a regular file check for a loop mount */
                  if ((device = strstr( entry->mnt_opts, "loop=" )))
                  {
                      device += 5;
                      if ((p = strchr( device, ',' ))) *p = 0;
                  }
              }
              else device = entry->mnt_fsname;
  
              if (device && !stat( device, &st ) && S_ISBLK(st.st_mode) && st.st_rdev == dev)
              {
                  ret = strdup( entry->mnt_dir );
                  break;
              }
          }
          fclose( f );
      }
      pthread_mutex_unlock( &mnt_mutex );
  #elif defined(__APPLE__)
      struct statfs *entry;
      struct stat st;
      int i, size;
  
      pthread_mutex_lock( &mnt_mutex );
  
      size = getmntinfo( &entry, MNT_NOWAIT );
      for (i = 0; i < size; i++)
      {
          if (stat( entry[i].f_mntfromname, &st ) == -1) continue;
          if (S_ISBLK(st.st_mode) && st.st_rdev == dev)
          {
              ret = strdup( entry[i].f_mntonname );
              break;
          }
      }
      pthread_mutex_unlock( &mnt_mutex );
  #else
      static int warned;
      if (!warned++) FIXME( "unmounting devices not supported on this platform\n" );
  #endif
      return ret;
  }
  
  
  #if defined(HAVE_GETATTRLIST) && defined(ATTR_VOL_CAPABILITIES) && \
      defined(VOL_CAPABILITIES_FORMAT) && defined(VOL_CAP_FMT_CASE_SENSITIVE)
  
  struct get_fsid
  {
      ULONG size;
      dev_t dev;
      fsid_t fsid;
  };
  
  struct fs_cache
  {
      dev_t dev;
      fsid_t fsid;
      BOOLEAN case_sensitive;
  } fs_cache[64];
  
  struct vol_caps
  {
      ULONG size;
      vol_capabilities_attr_t caps;
  };
  
  /***********************************************************************
   *           look_up_fs_cache
   *
   * Checks if the specified file system is in the cache.
   */
  static struct fs_cache *look_up_fs_cache( dev_t dev )
  {
      int i;
      for (i = 0; i < ARRAY_SIZE( fs_cache ); i++)
          if (fs_cache[i].dev == dev)
              return fs_cache+i;
      return NULL;
  }
  
  /***********************************************************************
   *           add_fs_cache
   *
   * Adds the specified file system to the cache.
   */
  static void add_fs_cache( dev_t dev, fsid_t fsid, BOOLEAN case_sensitive )
  {
      int i;
      struct fs_cache *entry = look_up_fs_cache( dev );
      static int once = 0;
      if (entry)
      {
          /* Update the cache */
          entry->fsid = fsid;
          entry->case_sensitive = case_sensitive;
          return;
      }
  
      /* Add a new entry */
      for (i = 0; i < ARRAY_SIZE( fs_cache ); i++)
          if (fs_cache[i].dev == 0)
          {
              /* This entry is empty, use it */
              fs_cache[i].dev = dev;
              fs_cache[i].fsid = fsid;
              fs_cache[i].case_sensitive = case_sensitive;
              return;
          }
  
      /* Cache is out of space, warn */
      if (!once++)
          WARN( "FS cache is out of space, expect performance problems\n" );
  }
  
  /***********************************************************************
   *           get_dir_case_sensitivity_attr
   *
   * Checks if the volume containing the specified directory is case
   * sensitive or not. Uses getattrlist(2).
   */
  static int get_dir_case_sensitivity_attr( const char *dir )
  {
      char *mntpoint;
      struct attrlist attr;
      struct vol_caps caps;
      struct get_fsid get_fsid;
      struct fs_cache *entry;
  
      /* First get the FS ID of the volume */
      attr.bitmapcount = ATTR_BIT_MAP_COUNT;
      attr.reserved = 0;
      attr.commonattr = ATTR_CMN_DEVID|ATTR_CMN_FSID;
      attr.volattr = attr.dirattr = attr.fileattr = attr.forkattr = 0;
      get_fsid.size = 0;
      if (getattrlist( dir, &attr, &get_fsid, sizeof(get_fsid), 0 ) != 0 ||
          get_fsid.size != sizeof(get_fsid))
          return -1;
      /* Try to look it up in the cache */
      entry = look_up_fs_cache( get_fsid.dev );
      if (entry && !memcmp( &entry->fsid, &get_fsid.fsid, sizeof(fsid_t) ))
          /* Cache lookup succeeded */
          return entry->case_sensitive;
      /* Cache is stale at this point, we have to update it */
  
      mntpoint = get_device_mount_point( get_fsid.dev );
      /* Now look up the case-sensitivity */
      attr.commonattr = 0;
      attr.volattr = ATTR_VOL_INFO|ATTR_VOL_CAPABILITIES;
      if (getattrlist( mntpoint, &attr, &caps, sizeof(caps), 0 ) < 0)
      {
          free( mntpoint );
          add_fs_cache( get_fsid.dev, get_fsid.fsid, TRUE );
          return TRUE;
      }
      free( mntpoint );
      if (caps.size == sizeof(caps) &&
          (caps.caps.valid[VOL_CAPABILITIES_FORMAT] &
           (VOL_CAP_FMT_CASE_SENSITIVE | VOL_CAP_FMT_CASE_PRESERVING)) ==
          (VOL_CAP_FMT_CASE_SENSITIVE | VOL_CAP_FMT_CASE_PRESERVING))
      {
          BOOLEAN ret;
  
          if ((caps.caps.capabilities[VOL_CAPABILITIES_FORMAT] &
              VOL_CAP_FMT_CASE_SENSITIVE) != VOL_CAP_FMT_CASE_SENSITIVE)
              ret = FALSE;
          else
              ret = TRUE;
          /* Update the cache */
          add_fs_cache( get_fsid.dev, get_fsid.fsid, ret );
          return ret;
      }
      return FALSE;
  }
  #endif
  
  /***********************************************************************
   *           get_dir_case_sensitivity_stat
   *
   * Checks if the volume containing the specified directory is case
   * sensitive or not. Uses (f)statfs(2), statvfs(2), fstatat(2), or ioctl(2).
   */
  static BOOLEAN get_dir_case_sensitivity_stat( const char *dir )
  {
  #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
      struct statfs stfs;
  
      if (statfs( dir, &stfs ) == -1) return FALSE;
      /* Assume these file systems are always case insensitive on Mac OS.
       * For FreeBSD, only assume CIOPFS is case insensitive (AFAIK, Mac OS
       * is the only UNIX that supports case-insensitive lookup).
       */
      if (!strcmp( stfs.f_fstypename, "fusefs" ) &&
          !strncmp( stfs.f_mntfromname, "ciopfs", 5 ))
          return FALSE;
  #ifdef __APPLE__
      if (!strcmp( stfs.f_fstypename, "msdos" ) ||
          !strcmp( stfs.f_fstypename, "cd9660" ) ||
          !strcmp( stfs.f_fstypename, "udf" ) ||
          !strcmp( stfs.f_fstypename, "ntfs" ) ||
          !strcmp( stfs.f_fstypename, "smbfs" ))
          return FALSE;
  #ifdef _DARWIN_FEATURE_64_BIT_INODE
       if (!strcmp( stfs.f_fstypename, "hfs" ) && (stfs.f_fssubtype == 0 ||
                                                   stfs.f_fssubtype == 1 ||
                                                   stfs.f_fssubtype == 128))
          return FALSE;
  #else
       /* The field says "reserved", but a quick look at the kernel source
        * tells us that this "reserved" field is really the same as the
        * "fssubtype" field from the inode64 structure (see munge_statfs()
        * in <xnu-source>/bsd/vfs/vfs_syscalls.c).
        */
       if (!strcmp( stfs.f_fstypename, "hfs" ) && (stfs.f_reserved1 == 0 ||
                                                   stfs.f_reserved1 == 1 ||
                                                   stfs.f_reserved1 == 128))
          return FALSE;
  #endif
  #endif
      return TRUE;
  
  #elif defined(__NetBSD__)
      struct statvfs stfs;
  
      if (statvfs( dir, &stfs ) == -1) return FALSE;
      /* Only assume CIOPFS is case insensitive. */
      if (strcmp( stfs.f_fstypename, "fusefs" ) ||
          strncmp( stfs.f_mntfromname, "ciopfs", 5 ))
          return TRUE;
      return FALSE;
  
  #elif defined(__linux__)
      BOOLEAN sens = TRUE;
      struct statfs stfs;
      struct stat st;
      int fd, flags;
  
      if ((fd = open( dir, O_RDONLY | O_NONBLOCK | O_LARGEFILE )) == -1)
          return TRUE;
  
      if (ioctl( fd, EXT2_IOC_GETFLAGS, &flags ) != -1 && (flags & EXT4_CASEFOLD_FL))
      {
          sens = FALSE;
      }
      else if (fstatfs( fd, &stfs ) == 0 &&                          /* CIOPFS is case insensitive.  Instead of */
               stfs.f_type == 0x65735546 /* FUSE_SUPER_MAGIC */ &&   /* parsing mtab to discover if the FUSE FS */
               fstatat( fd, ".ciopfs", &st, AT_NO_AUTOMOUNT ) == 0)  /* is CIOPFS, look for .ciopfs in the dir. */
      {
          sens = FALSE;
      }
  
      close( fd );
      return sens;
  #else
      return TRUE;
  #endif
  }
  
  
  /***********************************************************************
   *           get_dir_case_sensitivity
   *
   * Checks if the volume containing the specified directory is case
   * sensitive or not. Uses multiple methods, depending on platform.
   */
  static BOOLEAN get_dir_case_sensitivity( const char *dir )
  {
  #if defined(HAVE_GETATTRLIST) && defined(ATTR_VOL_CAPABILITIES) && \
      defined(VOL_CAPABILITIES_FORMAT) && defined(VOL_CAP_FMT_CASE_SENSITIVE)
      int case_sensitive = get_dir_case_sensitivity_attr( dir );
      if (case_sensitive != -1) return case_sensitive;
  #endif
      return get_dir_case_sensitivity_stat( dir );
  }
  
  
  /***********************************************************************
   *           is_hidden_file
   *
   * Check if the specified file should be hidden based on its name and the show dot files option.
   */
  static BOOL is_hidden_file( const UNICODE_STRING *name )
  {
      WCHAR *p, *end;
  
      if (show_dot_files) return FALSE;
  
      end = p = name->Buffer + name->Length/sizeof(WCHAR);
      while (p > name->Buffer && IS_SEPARATOR(p[-1])) p--;
      while (p > name->Buffer && !IS_SEPARATOR(p[-1])) p--;
      if (p == end || *p != '.') return FALSE;
      /* make sure it isn't '.' or '..' */
      if (p + 1 == end) return FALSE;
      if (p[1] == '.' && p + 2 == end) return FALSE;
      return TRUE;
  }
  
  
  /***********************************************************************
   *           hash_short_file_name
   *
   * Transform a Unix file name into a hashed DOS name. If the name is not a valid
   * DOS name, it is replaced by a hashed version that fits in 8.3 format.
   * 'buffer' must be at least 12 characters long.
   * Returns length of short name in bytes; short name is NOT null-terminated.
   */
  static ULONG hash_short_file_name( const WCHAR *name, int length, LPWSTR buffer )
  {
      static const char hash_chars[32] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ012345";
  
      LPCWSTR p, ext, end = name + length;
      LPWSTR dst;
      unsigned short hash;
      int i;
  
      /* Compute the hash code of the file name */
      /* If you know something about hash functions, feel free to */
      /* insert a better algorithm here... */
      if (!is_case_sensitive)
      {
          for (p = name, hash = 0xbeef; p < end - 1; p++)
              hash = (hash<<3) ^ (hash>>5) ^ towlower(*p) ^ (towlower(p[1]) << 8);
          hash = (hash<<3) ^ (hash>>5) ^ towlower(*p); /* Last character */
      }
      else
      {
          for (p = name, hash = 0xbeef; p < end - 1; p++)
              hash = (hash << 3) ^ (hash >> 5) ^ *p ^ (p[1] << 8);
          hash = (hash << 3) ^ (hash >> 5) ^ *p;  /* Last character */
      }
  
      /* Find last dot for start of the extension */
      for (p = name + 1, ext = NULL; p < end - 1; p++) if (*p == '.') ext = p;
  
      /* Copy first 4 chars, replacing invalid chars with '_' */
      for (i = 4, p = name, dst = buffer; i > 0; i--, p++)
      {
          if (p == end || p == ext) break;
          *dst++ = is_invalid_dos_char(*p) ? '_' : *p;
      }
      /* Pad to 5 chars with '~' */
      while (i-- >= 0) *dst++ = '~';
  
      /* Insert hash code converted to 3 ASCII chars */
      *dst++ = hash_chars[(hash >> 10) & 0x1f];
      *dst++ = hash_chars[(hash >> 5) & 0x1f];
      *dst++ = hash_chars[hash & 0x1f];
  
      /* Copy the first 3 chars of the extension (if any) */
      if (ext)
      {
          *dst++ = '.';
          for (i = 3, ext++; (i > 0) && ext < end; i--, ext++)
              *dst++ = is_invalid_dos_char(*ext) ? '_' : *ext;
      }
      return dst - buffer;
  }
  
  
  /***********************************************************************
   *           match_filename
   *
   * Check a long file name against a mask.
   *
   * Tests (done in W95 DOS shell - case insensitive):
   * *.txt			test1.test.txt				*
   * *st1*			test1.txt				*
   * *.t??????.t*			test1.ta.tornado.txt			*
   * *tornado*			test1.ta.tornado.txt			*
   * t*t				test1.ta.tornado.txt			*
   * ?est*			test1.txt				*
   * ?est???			test1.txt				-
   * *test1.txt*			test1.txt				*
   * h?l?o*t.dat			hellothisisatest.dat			*
   */
  static BOOLEAN match_filename( const WCHAR *name, int length, const UNICODE_STRING *mask_str )
  {
      BOOL mismatch;
      const WCHAR *mask = mask_str->Buffer;
      const WCHAR *name_end = name + length;
      const WCHAR *mask_end = mask + mask_str->Length / sizeof(WCHAR);
      const WCHAR *lastjoker = NULL;
      const WCHAR *next_to_retry = NULL;
  
      while (name < name_end && mask < mask_end)
      {
          switch(*mask)
          {
          case '*':
              mask++;
              while (mask < mask_end && *mask == '*') mask++;  /* Skip consecutive '*' */
              if (mask == mask_end) return TRUE; /* end of mask is all '*', so match */
              lastjoker = mask;
  
              /* skip to the next match after the joker(s) */
              if (is_case_sensitive)
                  while (name < name_end && (*name != *mask)) name++;
              else
                  while (name < name_end && (towupper(*name) != towupper(*mask))) name++;
              next_to_retry = name;
              break;
          case '?':
              mask++;
              name++;
              break;
          default:
              if (is_case_sensitive) mismatch = (*mask != *name);
              else mismatch = (towupper(*mask) != towupper(*name));
  
              if (!mismatch)
              {
                  mask++;
                  name++;
                  if (mask == mask_end)
                  {
                      if (name == name_end) return TRUE;
                      if (lastjoker) mask = lastjoker;
                  }
              }
              else /* mismatch ! */
              {
                  if (lastjoker) /* we had an '*', so we can try unlimitedly */
                  {
                      mask = lastjoker;
  
                      /* this scan sequence was a mismatch, so restart
                       * 1 char after the first char we checked last time */
                      next_to_retry++;
                      name = next_to_retry;
                  }
                  else return FALSE; /* bad luck */
              }
              break;
          }
      }
      while (mask < mask_end && ((*mask == '.') || (*mask == '*')))
          mask++;  /* Ignore trailing '.' or '*' in mask */
      return (name == name_end && mask == mask_end);
  }
  
  
  /***********************************************************************
   *           is_legal_8dot3_name
   *
   * Simplified version of RtlIsNameLegalDOS8Dot3.
   */
  static BOOLEAN is_legal_8dot3_name( const WCHAR *name, int len )
  {
      static const WCHAR invalid_chars[] = { INVALID_DOS_CHARS,':','/','\\',0 };
      int i, dot = -1;
  
      if (len > 12) return FALSE;
  
      /* a starting . is invalid, except for . and .. */
      if (len > 0 && name[0] == '.') return (len == 1 || (len == 2 && name[1] == '.'));
  
      for (i = 0; i < len; i++)
      {
          if (name[i] > 0x7f) return FALSE;
          if (wcschr( invalid_chars, name[i] )) return FALSE;
          if (name[i] == '.')
          {
              if (dot != -1) return FALSE;
              dot = i;
          }
      }
  
      if (dot == -1) return (len <= 8);
      if (dot > 8) return FALSE;
      return (len - dot > 1 && len - dot < 5);
  }
  
  
  /***********************************************************************
   *           append_entry
   *
   * Add a file to the directory data if it matches the mask.
   */
  static BOOL append_entry( struct dir_data *data, const char *long_name,
                            const char *short_name, const UNICODE_STRING *mask )
  {
      int long_len, short_len;
      WCHAR long_nameW[MAX_DIR_ENTRY_LEN + 1];
      WCHAR short_nameW[13];
  
      long_len = ntdll_umbstowcs( long_name, strlen(long_name), long_nameW, ARRAY_SIZE(long_nameW) );
      if (long_len == ARRAY_SIZE(long_nameW)) return TRUE;
      long_nameW[long_len] = 0;
  
      if (short_name)
      {
          short_len = ntdll_umbstowcs( short_name, strlen(short_name),
                                       short_nameW, ARRAY_SIZE( short_nameW ) - 1 );
      }
      else  /* generate a short name if necessary */
      {
          short_len = 0;
          if (!is_legal_8dot3_name( long_nameW, long_len ))
              short_len = hash_short_file_name( long_nameW, long_len, short_nameW );
      }
      short_nameW[short_len] = 0;
      wcsupr( short_nameW );
  
      TRACE( "long %s short %s mask %s\n",
             debugstr_w( long_nameW ), debugstr_w( short_nameW ), debugstr_us( mask ));
  
      if (mask && !match_filename( long_nameW, long_len, mask ))
      {
          if (!short_len) return TRUE;  /* no short name to match */
          if (!match_filename( short_nameW, short_len, mask )) return TRUE;
      }
  
      return add_dir_data_names( data, long_nameW, short_nameW, long_name );
  }
  
  
  NTSTATUS FILE_DecodeSymlink(const char *unix_src, char *unix_dest, int *unix_dest_len,
                              DWORD *tag, ULONG *flags, BOOL *is_dir);
  
  /* fetch the attributes of a file */
  static inline ULONG get_file_attributes( const struct stat *st )
  {
      ULONG attr;
  
      if (S_ISDIR(st->st_mode))
          attr = FILE_ATTRIBUTE_DIRECTORY;
      else
          attr = FILE_ATTRIBUTE_ARCHIVE;
      if (!(st->st_mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
          attr |= FILE_ATTRIBUTE_READONLY;
      return attr;
  }
  
  
  static BOOL fd_is_mount_point( int fd, const struct stat *st )
  {
      struct stat parent;
      return S_ISDIR( st->st_mode ) && !fstatat( fd, "..", &parent, 0 )
              && (parent.st_dev != st->st_dev || parent.st_ino == st->st_ino);
  }
  
  
  /* get the stat info and file attributes for a file (by file descriptor) */
  static int fd_get_file_info( int fd, unsigned int options, struct stat *st, ULONG *attr )
  {
      int ret;
  
      *attr = 0;
      ret = fstat( fd, st );
      if (ret == -1) return ret;
      *attr |= get_file_attributes( st );
      /* consider mount points to be reparse points (IO_REPARSE_TAG_MOUNT_POINT) */
      if ((options & FILE_OPEN_REPARSE_POINT) && fd_is_mount_point( fd, st ))
          *attr |= FILE_ATTRIBUTE_REPARSE_POINT;
      return ret;
  }
  
  
  /* get the stat info and file attributes for a file (by name) */
  static int get_file_info( const char *path, struct stat *st, ULONG *attr )
  {
      char *parent_path;
      int ret;
  
      *attr = 0;
      ret = lstat( path, st );
      if (ret == -1) return ret;
      if (S_ISLNK( st->st_mode ))
      {
          BOOL is_dir;
  
          /* return information about the destination (unless this is a dangling symlink) */
          stat( path, st );
          /* symbolic links always report size 0 */
          st->st_size = 0;
          /* symbolic links (either junction points or NT symlinks) are "reparse points" */
          *attr |= FILE_ATTRIBUTE_REPARSE_POINT;
          /* whether a reparse point is a file or a directory is stored inside the link target */
          if (FILE_DecodeSymlink( path, NULL, NULL, NULL, NULL, &is_dir ) == STATUS_SUCCESS)
              st->st_mode = (st->st_mode & ~S_IFMT) | (is_dir ? S_IFDIR : S_IFREG);
      }
      else if (S_ISDIR( st->st_mode ) && (parent_path = malloc( strlen(path) + 4 )))
      {
          struct stat parent_st;
  
          /* consider mount points to be reparse points (IO_REPARSE_TAG_MOUNT_POINT) */
          strcpy( parent_path, path );
          strcat( parent_path, "/.." );
          if (!stat( parent_path, &parent_st )
                  && (st->st_dev != parent_st.st_dev || st->st_ino == parent_st.st_ino))
              *attr |= FILE_ATTRIBUTE_REPARSE_POINT;
  
          free( parent_path );
      }
      *attr |= get_file_attributes( st );
      return ret;
  }
  
  
  #if defined(__ANDROID__) && !defined(HAVE_FUTIMENS)
  static int futimens( int fd, const struct timespec spec[2] )
  {
      return syscall( __NR_utimensat, fd, NULL, spec, 0 );
  }
  #define HAVE_FUTIMENS
  #endif  /* __ANDROID__ */
  
  #ifndef UTIME_OMIT
  #define UTIME_OMIT ((1 << 30) - 2)
  #endif
  
  static BOOL set_file_times_precise( int fd, const LARGE_INTEGER *mtime,
                                      const LARGE_INTEGER *atime, NTSTATUS *status )
  {
  #ifdef HAVE_FUTIMENS
      struct timespec tv[2];
  
      tv[0].tv_sec = tv[1].tv_sec = 0;
      tv[0].tv_nsec = tv[1].tv_nsec = UTIME_OMIT;
      if (atime->QuadPart)
      {
          tv[0].tv_sec = atime->QuadPart / 10000000 - SECS_1601_TO_1970;
          tv[0].tv_nsec = (atime->QuadPart % 10000000) * 100;
      }
      if (mtime->QuadPart)
      {
          tv[1].tv_sec = mtime->QuadPart / 10000000 - SECS_1601_TO_1970;
          tv[1].tv_nsec = (mtime->QuadPart % 10000000) * 100;
      }
  #ifdef __APPLE__
      if (!&futimens) return FALSE;
  #endif
      if (futimens( fd, tv ) == -1) *status = errno_to_status( errno );
      else *status = STATUS_SUCCESS;
      return TRUE;
  #else
      return FALSE;
  #endif
  }
  
  
  static NTSTATUS set_file_times( int fd, const LARGE_INTEGER *mtime, const LARGE_INTEGER *atime )
  {
      NTSTATUS status = STATUS_SUCCESS;
  #if defined(HAVE_FUTIMES) || defined(HAVE_FUTIMESAT)
      struct timeval tv[2];
      struct stat st;
  #endif
  
      if (set_file_times_precise( fd, mtime, atime, &status ))
          return status;
  
  #if defined(HAVE_FUTIMES) || defined(HAVE_FUTIMESAT)
      if (!atime->QuadPart || !mtime->QuadPart)
      {
  
          tv[0].tv_sec = tv[0].tv_usec = 0;
          tv[1].tv_sec = tv[1].tv_usec = 0;
          if (!fstat( fd, &st ))
          {
              tv[0].tv_sec = st.st_atime;
              tv[1].tv_sec = st.st_mtime;
  #ifdef HAVE_STRUCT_STAT_ST_ATIM
              tv[0].tv_usec = st.st_atim.tv_nsec / 1000;
  #elif defined(HAVE_STRUCT_STAT_ST_ATIMESPEC)
              tv[0].tv_usec = st.st_atimespec.tv_nsec / 1000;
  #endif
  #ifdef HAVE_STRUCT_STAT_ST_MTIM
              tv[1].tv_usec = st.st_mtim.tv_nsec / 1000;
  #elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC)
              tv[1].tv_usec = st.st_mtimespec.tv_nsec / 1000;
  #endif
          }
      }
      if (atime->QuadPart)
      {
          tv[0].tv_sec = atime->QuadPart / 10000000 - SECS_1601_TO_1970;
          tv[0].tv_usec = (atime->QuadPart % 10000000) / 10;
      }
      if (mtime->QuadPart)
      {
          tv[1].tv_sec = mtime->QuadPart / 10000000 - SECS_1601_TO_1970;
          tv[1].tv_usec = (mtime->QuadPart % 10000000) / 10;
      }
  #ifdef HAVE_FUTIMES
      if (futimes( fd, tv ) == -1) status = errno_to_status( errno );
  #elif defined(HAVE_FUTIMESAT)
      if (futimesat( fd, NULL, tv ) == -1) status = errno_to_status( errno );
  #endif
  
  #else  /* HAVE_FUTIMES || HAVE_FUTIMESAT */
      FIXME( "setting file times not supported\n" );
      status = STATUS_NOT_IMPLEMENTED;
  #endif
      return status;
  }
  
  
  static inline void get_file_times( const struct stat *st, LARGE_INTEGER *mtime, LARGE_INTEGER *ctime,
                                     LARGE_INTEGER *atime, LARGE_INTEGER *creation )
  {
      mtime->QuadPart = st->st_mtime * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
      ctime->QuadPart = st->st_ctime * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
      atime->QuadPart = st->st_atime * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
  #ifdef HAVE_STRUCT_STAT_ST_MTIM
      mtime->QuadPart += st->st_mtim.tv_nsec / 100;
  #elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC)
      mtime->QuadPart += st->st_mtimespec.tv_nsec / 100;
  #endif
  #ifdef HAVE_STRUCT_STAT_ST_CTIM
      ctime->QuadPart += st->st_ctim.tv_nsec / 100;
  #elif defined(HAVE_STRUCT_STAT_ST_CTIMESPEC)
      ctime->QuadPart += st->st_ctimespec.tv_nsec / 100;
  #endif
  #ifdef HAVE_STRUCT_STAT_ST_ATIM
      atime->QuadPart += st->st_atim.tv_nsec / 100;
  #elif defined(HAVE_STRUCT_STAT_ST_ATIMESPEC)
      atime->QuadPart += st->st_atimespec.tv_nsec / 100;
  #endif
  #ifdef HAVE_STRUCT_STAT_ST_BIRTHTIME
      creation->QuadPart = st->st_birthtime * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
  #ifdef HAVE_STRUCT_STAT_ST_BIRTHTIM
      creation->QuadPart += st->st_birthtim.tv_nsec / 100;
  #elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC)
      creation->QuadPart += st->st_birthtimespec.tv_nsec / 100;
  #endif
  #elif defined(HAVE_STRUCT_STAT___ST_BIRTHTIME)
      creation->QuadPart = st->__st_birthtime * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
  #ifdef HAVE_STRUCT_STAT___ST_BIRTHTIM
      creation->QuadPart += st->__st_birthtim.tv_nsec / 100;
  #endif
  #else
      *creation = *mtime;
  #endif
  }
  
  
  /* fill in the file information that depends on the stat and attribute info */
  static NTSTATUS fill_file_info( const struct stat *st, ULONG attr, void *ptr,
                                  FILE_INFORMATION_CLASS class )
  {
      switch (class)
      {
      case FileBasicInformation:
          {
              FILE_BASIC_INFORMATION *info = ptr;
  
              get_file_times( st, &info->LastWriteTime, &info->ChangeTime,
                              &info->LastAccessTime, &info->CreationTime );
              info->FileAttributes = attr;
          }
          break;
      case FileStandardInformation:
          {
              FILE_STANDARD_INFORMATION *info = ptr;
  
              if ((info->Directory = S_ISDIR(st->st_mode)))
              {
                  info->AllocationSize.QuadPart = 0;
                  info->EndOfFile.QuadPart      = 0;
                  info->NumberOfLinks           = 1;
              }
              else
              {
                  info->AllocationSize.QuadPart = (ULONGLONG)st->st_blocks * 512;
                  info->EndOfFile.QuadPart      = st->st_size;
                  info->NumberOfLinks           = st->st_nlink;
              }
          }
          break;
      case FileInternalInformation:
          {
              FILE_INTERNAL_INFORMATION *info = ptr;
              info->IndexNumber.QuadPart = st->st_ino;
          }
          break;
      case FileEndOfFileInformation:
          {
              FILE_END_OF_FILE_INFORMATION *info = ptr;
              info->EndOfFile.QuadPart = S_ISDIR(st->st_mode) ? 0 : st->st_size;
          }
          break;
      case FileAllInformation:
          {
              FILE_ALL_INFORMATION *info = ptr;
              fill_file_info( st, attr, &info->BasicInformation, FileBasicInformation );
              fill_file_info( st, attr, &info->StandardInformation, FileStandardInformation );
              fill_file_info( st, attr, &info->InternalInformation, FileInternalInformation );
          }
          break;
      /* all directory structures start with the FileDirectoryInformation layout */
      case FileBothDirectoryInformation:
      case FileFullDirectoryInformation:
      case FileDirectoryInformation:
          {
              FILE_DIRECTORY_INFORMATION *info = ptr;
  
              get_file_times( st, &info->LastWriteTime, &info->ChangeTime,
                              &info->LastAccessTime, &info->CreationTime );
              if (S_ISDIR(st->st_mode))
              {
                  info->AllocationSize.QuadPart = 0;
                  info->EndOfFile.QuadPart      = 0;
              }
              else
              {
                  info->AllocationSize.QuadPart = (ULONGLONG)st->st_blocks * 512;
                  info->EndOfFile.QuadPart      = st->st_size;
              }
              info->FileAttributes = attr;
          }
          break;
      case FileIdFullDirectoryInformation:
          {
              FILE_ID_FULL_DIRECTORY_INFORMATION *info = ptr;
              info->FileId.QuadPart = st->st_ino;
              fill_file_info( st, attr, info, FileDirectoryInformation );
          }
          break;
      case FileIdBothDirectoryInformation:
          {
              FILE_ID_BOTH_DIRECTORY_INFORMATION *info = ptr;
              info->FileId.QuadPart = st->st_ino;
              fill_file_info( st, attr, info, FileDirectoryInformation );
          }
          break;
      case FileIdGlobalTxDirectoryInformation:
          {
              FILE_ID_GLOBAL_TX_DIR_INFORMATION *info = ptr;
              info->FileId.QuadPart = st->st_ino;
              fill_file_info( st, attr, info, FileDirectoryInformation );
          }
          break;
  
      default:
          return STATUS_INVALID_INFO_CLASS;
      }
      return STATUS_SUCCESS;
  }
  
  
  static NTSTATUS server_get_unix_name( HANDLE handle, char **unix_name )
  {
      data_size_t size = 1024;
      NTSTATUS ret;
      char *name;
  
      for (;;)
      {
          if (!(name = malloc( size + 1 ))) return STATUS_NO_MEMORY;
  
          SERVER_START_REQ( get_handle_unix_name )
          {
              req->handle = wine_server_obj_handle( handle );
              wine_server_set_reply( req, name, size );
              ret = wine_server_call( req );
              size = reply->name_len;
          }
          SERVER_END_REQ;
  
          if (!ret)
          {
              name[size] = 0;
              *unix_name = name;
              break;
          }
          free( name );
          if (ret != STATUS_BUFFER_OVERFLOW) break;
      }
      return ret;
  }
  
  static NTSTATUS fill_name_info( const char *unix_name, FILE_NAME_INFORMATION *info, LONG *name_len )
  {
      WCHAR *nt_name;
      NTSTATUS status;
  
      if (!(status = unix_to_nt_file_name( unix_name, &nt_name )))
      {
          const WCHAR *ptr = nt_name;
          const WCHAR *end = ptr + wcslen( nt_name );
  
          /* Skip the volume mount point. */
          while (ptr != end && *ptr == '\\') ++ptr;
          while (ptr != end && *ptr != '\\') ++ptr;
          while (ptr != end && *ptr == '\\') ++ptr;
          while (ptr != end && *ptr != '\\') ++ptr;
  
          info->FileNameLength = (end - ptr) * sizeof(WCHAR);
          if (*name_len < info->FileNameLength) status = STATUS_BUFFER_OVERFLOW;
          else *name_len = info->FileNameLength;
  
          memcpy( info->FileName, ptr, *name_len );
          free( nt_name );
      }
  
      return status;
  }
  
  
  static NTSTATUS server_get_file_info( HANDLE handle, IO_STATUS_BLOCK *io, void *buffer,
                                        ULONG length, FILE_INFORMATION_CLASS info_class )
  {
      SERVER_START_REQ( get_file_info )
      {
          req->handle = wine_server_obj_handle( handle );
          req->info_class = info_class;
          wine_server_set_reply( req, buffer, length );
          io->u.Status = wine_server_call( req );
          io->Information = wine_server_reply_size( reply );
      }
      SERVER_END_REQ;
      if (io->u.Status == STATUS_NOT_IMPLEMENTED)
          FIXME( "Unsupported info class %x\n", info_class );
      return io->u.Status;
  
  }
  
  
  /* retrieve device/inode number for all the drives */
  static unsigned int get_drives_info( struct file_identity info[MAX_DOS_DRIVES] )
  {
      static pthread_mutex_t cache_mutex = PTHREAD_MUTEX_INITIALIZER;
      static struct file_identity cache[MAX_DOS_DRIVES];
      static time_t last_update;
      static unsigned int nb_drives;
      unsigned int ret;
      time_t now = time(NULL);
  
      pthread_mutex_lock( &cache_mutex );
      if (now != last_update)
      {
          char *buffer, *p;
          struct stat st;
          unsigned int i;
  
          if ((buffer = malloc( strlen(config_dir) + sizeof("/dosdevices/a:") )))
          {
              strcpy( buffer, config_dir );
              strcat( buffer, "/dosdevices/a:" );
              p = buffer + strlen(buffer) - 2;
  
              for (i = nb_drives = 0; i < MAX_DOS_DRIVES; i++)
              {
                  *p = 'a' + i;
                  if (!stat( buffer, &st ))
                  {
                      cache[i].dev = st.st_dev;
                      cache[i].ino = st.st_ino;
                      nb_drives++;
                  }
                  else
                  {
                      cache[i].dev = 0;
                      cache[i].ino = 0;
                  }
              }
              free( buffer );
          }
          last_update = now;
      }
      memcpy( info, cache, sizeof(cache) );
      ret = nb_drives;
      pthread_mutex_unlock( &cache_mutex );
      return ret;
  }
  
  
  /* Find a DOS device which can act as the root of "path".
   * Similar to find_drive_root(), but returns -1 instead of crossing volumes. */
  static int find_dos_device( const char *path )
  {
      int len = strlen(path);
      int drive;
      char *buffer;
      struct stat st;
      struct file_identity info[MAX_DOS_DRIVES];
      dev_t dev_id;
  
      if (!get_drives_info( info )) return -1;
  
      if (stat( path, &st ) < 0) return -1;
      dev_id = st.st_dev;
  
      /* strip off trailing slashes */
      while (len > 1 && path[len - 1] == '/') len--;
  
      /* make a copy of the path */
      if (!(buffer = malloc( len + 1 ))) return -1;
      memcpy( buffer, path, len );
      buffer[len] = 0;
  
      for (;;)
      {
          if (!stat( buffer, &st ) && S_ISDIR( st.st_mode ))
          {
              if (st.st_dev != dev_id) break;
  
              for (drive = 0; drive < MAX_DOS_DRIVES; drive++)
              {
                  if ((info[drive].dev == st.st_dev) && (info[drive].ino == st.st_ino))
                  {
                      TRACE( "%s -> drive %c:, root=%s, name=%s\n",
                             debugstr_a(path), 'A' + drive, debugstr_a(buffer), debugstr_a(path + len));
                      free( buffer );
                      return drive;
                  }
              }
          }
          if (len <= 1) break;  /* reached root */
          while (len > 1 && path[len - 1] != '/') len--;
          while (len > 1 && path[len - 1] == '/') len--;
          buffer[len] = 0;
      }
      free( buffer );
      return -1;
  }
  
  static NTSTATUS get_mountmgr_fs_info( HANDLE handle, int fd, struct mountmgr_unix_drive *drive, ULONG size )
  {
      OBJECT_ATTRIBUTES attr;
      UNICODE_STRING string;
      char *unix_name;
      IO_STATUS_BLOCK io;
      HANDLE mountmgr;
      NTSTATUS status;
      int letter;
  
      if ((status = server_get_unix_name( handle, &unix_name ))) return status;
      letter = find_dos_device( unix_name );
      free( unix_name );
  
      if (letter == -1)
      {
          struct stat st;
  
          fstat( fd, &st );
          drive->unix_dev = st.st_dev;
          drive->letter = 0;
      }
      else
          drive->letter = 'a' + letter;
  
      string.Buffer = (WCHAR *)MOUNTMGR_DEVICE_NAME;
      string.Length = sizeof(MOUNTMGR_DEVICE_NAME) - sizeof(WCHAR);
      InitializeObjectAttributes( &attr, &string, 0, NULL, NULL );
      status = NtOpenFile( &mountmgr, GENERIC_READ | SYNCHRONIZE, &attr, &io,
                           FILE_SHARE_READ | FILE_SHARE_WRITE, FILE_SYNCHRONOUS_IO_NONALERT );
      if (status) return status;
  
      status = NtDeviceIoControlFile( mountmgr, NULL, NULL, NULL, &io, IOCTL_MOUNTMGR_QUERY_UNIX_DRIVE,
                                      drive, sizeof(*drive), drive, size );
      NtClose( mountmgr );
      if (status == STATUS_BUFFER_OVERFLOW) status = STATUS_SUCCESS;
      else if (status) WARN("failed to retrieve filesystem type from mountmgr, status %#x\n", status);
      return status;
  }
  
  
  /***********************************************************************
   *           get_dir_data_entry
   *
   * Return a directory entry from the cached data.
   */
  static NTSTATUS get_dir_data_entry( struct dir_data *dir_data, void *info_ptr, IO_STATUS_BLOCK *io,
                                      ULONG max_length, FILE_INFORMATION_CLASS class,
                                      union file_directory_info **last_info )
  {
      const struct dir_data_names *names = &dir_data->names[dir_data->pos];
      union file_directory_info *info;
      struct stat st;
      ULONG name_len, start, dir_size, attributes;
  
      if (get_file_info( names->unix_name, &st, &attributes ) == -1)
      {
          TRACE( "file no longer exists %s\n", names->unix_name );
          return STATUS_SUCCESS;
      }
      if (is_ignored_file( &st ))
      {
          TRACE( "ignoring file %s\n", names->unix_name );
          return STATUS_SUCCESS;
      }
      start = dir_info_align( io->Information );
      dir_size = dir_info_size( class, 0 );
      if (start + dir_size > max_length) return STATUS_MORE_ENTRIES;
  
      max_length -= start + dir_size;
      name_len = wcslen( names->long_name ) * sizeof(WCHAR);
      /* if this is not the first entry, fail; the first entry is always returned (but truncated) */
      if (*last_info && name_len > max_length) return STATUS_MORE_ENTRIES;
  
      info = (union file_directory_info *)((char *)info_ptr + start);
      info->dir.NextEntryOffset = 0;
      info->dir.FileIndex = 0;  /* NTFS always has 0 here, so let's not bother with it */
  
      /* all the structures except FileNamesInformation start with a FileDirectoryInformation layout */
      if (class != FileNamesInformation)
      {
          if (st.st_dev != dir_data->id.dev) st.st_ino = 0;  /* ignore inode if on a different device */
  
          if (!show_dot_files && names->long_name[0] == '.' && names->long_name[1] &&
              (names->long_name[1] != '.' || names->long_name[2]))
              attributes |= FILE_ATTRIBUTE_HIDDEN;
  
          fill_file_info( &st, attributes, info, class );
      }
  
      switch (class)
      {
      case FileDirectoryInformation:
          info->dir.FileNameLength = name_len;
          break;
  
      case FileFullDirectoryInformation:
          info->full.EaSize = 0; /* FIXME */
          info->full.FileNameLength = name_len;
          break;
  
      case FileIdFullDirectoryInformation:
          info->id_full.EaSize = 0; /* FIXME */
          info->id_full.FileNameLength = name_len;
          break;
  
      case FileBothDirectoryInformation:
          info->both.EaSize = 0; /* FIXME */
          info->both.ShortNameLength = wcslen( names->short_name ) * sizeof(WCHAR);
          memcpy( info->both.ShortName, names->short_name, info->both.ShortNameLength );
          info->both.FileNameLength = name_len;
          break;
  
      case FileIdBothDirectoryInformation:
          info->id_both.EaSize = 0; /* FIXME */
          info->id_both.ShortNameLength = wcslen( names->short_name ) * sizeof(WCHAR);
          memcpy( info->id_both.ShortName, names->short_name, info->id_both.ShortNameLength );
          info->id_both.FileNameLength = name_len;
          break;
  
      case FileIdGlobalTxDirectoryInformation:
          info->id_tx.TxInfoFlags = 0;
          info->id_tx.FileNameLength = name_len;
          break;
  
      case FileNamesInformation:
          info->names.FileNameLength = name_len;
          break;
  
      default:
          assert(0);
          return 0;
      }
  
      memcpy( (char *)info + dir_size, names->long_name, min( name_len, max_length ) );
      io->Information = start + dir_size + min( name_len, max_length );
      if (*last_info) (*last_info)->next = (char *)info - (char *)*last_info;
      *last_info = info;
      return name_len > max_length ? STATUS_BUFFER_OVERFLOW : STATUS_SUCCESS;
  }
  
  #ifdef VFAT_IOCTL_READDIR_BOTH
  
  /***********************************************************************
   *           read_directory_vfat
   *
   * Read a directory using the VFAT ioctl; helper for NtQueryDirectoryFile.
   */
  static NTSTATUS read_directory_data_vfat( struct dir_data *data, int fd, const UNICODE_STRING *mask )
  {
      char *short_name, *long_name;
      KERNEL_DIRENT de[2];
      NTSTATUS status = STATUS_NO_MEMORY;
      off_t old_pos = lseek( fd, 0, SEEK_CUR );
  
      lseek( fd, 0, SEEK_SET );
  
      if (ioctl( fd, VFAT_IOCTL_READDIR_BOTH, (long)de ) == -1)
      {
          if (errno != ENOENT)
          {
              status = STATUS_NOT_SUPPORTED;
              goto done;
          }
          de[0].d_reclen = 0;
      }
  
      if (!append_entry( data, ".", NULL, mask )) goto done;
      if (!append_entry( data, "..", NULL, mask )) goto done;
  
      while (de[0].d_reclen)
      {
          if (strcmp( de[0].d_name, "." ) && strcmp( de[0].d_name, ".." ))
          {
              if (de[1].d_name[0])
              {
                  short_name = de[0].d_name;
                  long_name = de[1].d_name;
              }
              else
              {
                  long_name = de[0].d_name;
                  short_name = NULL;
              }
              if (!append_entry( data, long_name, short_name, mask )) goto done;
          }
          if (ioctl( fd, VFAT_IOCTL_READDIR_BOTH, (long)de ) == -1) break;
      }
      status = STATUS_SUCCESS;
  done:
      lseek( fd, old_pos, SEEK_SET );
      return status;
  }
  #endif /* VFAT_IOCTL_READDIR_BOTH */
  
  
  #ifdef HAVE_GETATTRLIST
  /***********************************************************************
   *           read_directory_getattrlist
   *
   * Read a single file from a directory by determining whether the file
   * identified by mask exists using getattrlist.
   */
  static NTSTATUS read_directory_data_getattrlist( struct dir_data *data, const char *unix_name )
  {
      struct attrlist attrlist;
  #include "pshpack4.h"
      struct
      {
          u_int32_t length;
          struct attrreference name_reference;
          fsobj_type_t type;
          char name[NAME_MAX * 3 + 1];
      } buffer;
  #include "poppack.h"
  
      memset( &attrlist, 0, sizeof(attrlist) );
      attrlist.bitmapcount = ATTR_BIT_MAP_COUNT;
      attrlist.commonattr = ATTR_CMN_NAME | ATTR_CMN_OBJTYPE;
      if (getattrlist( unix_name, &attrlist, &buffer, sizeof(buffer), FSOPT_NOFOLLOW ) == -1)
          return STATUS_NO_SUCH_FILE;
      /* If unix_name named a symlink, the above may have succeeded even if the symlink is broken.
         Check that with another call without FSOPT_NOFOLLOW.  We don't ask for any attributes. */
      if (buffer.type == VLNK)
      {
          u_int32_t dummy;
          attrlist.commonattr = 0;
          if (getattrlist( unix_name, &attrlist, &dummy, sizeof(dummy), 0 ) == -1)
              return STATUS_NO_SUCH_FILE;
      }
  
      TRACE( "found %s\n", buffer.name );
  
      if (!append_entry( data, buffer.name, NULL, NULL )) return STATUS_NO_MEMORY;
  
      return STATUS_SUCCESS;
  }
  #endif  /* HAVE_GETATTRLIST */
  
  
  /***********************************************************************
   *           read_directory_stat
   *
   * Read a single file from a directory by determining whether the file
   * identified by mask exists using stat.
   */
  static NTSTATUS read_directory_data_stat( struct dir_data *data, const char *unix_name )
  {
      struct stat st;
  
      /* if the file system is not case sensitive we can't find the actual name through stat() */
      if (!get_dir_case_sensitivity(".")) return STATUS_NO_SUCH_FILE;
      if (stat( unix_name, &st ) == -1) return STATUS_NO_SUCH_FILE;
  
      TRACE( "found %s\n", unix_name );
  
      if (!append_entry( data, unix_name, NULL, NULL )) return STATUS_NO_MEMORY;
  
      return STATUS_SUCCESS;
  }
  
  
  /***********************************************************************
   *           read_directory_readdir
   *
   * Read a directory using the POSIX readdir interface; helper for NtQueryDirectoryFile.
   */
  static NTSTATUS read_directory_data_readdir( struct dir_data *data, const UNICODE_STRING *mask )
  {
      struct dirent *de;
      NTSTATUS status = STATUS_NO_MEMORY;
      DIR *dir = opendir( "." );
  
      if (!dir) return STATUS_NO_SUCH_FILE;
  
      if (!append_entry( data, ".", NULL, mask )) goto done;
      if (!append_entry( data, "..", NULL, mask )) goto done;
      while ((de = readdir( dir )))
      {
          if (!strcmp( de->d_name, "." ) || !strcmp( de->d_name, ".." )) continue;
          if (!append_entry( data, de->d_name, NULL, mask )) goto done;
      }
      status = STATUS_SUCCESS;
  
  done:
      closedir( dir );
      return status;
  }
  
  
  /***********************************************************************
   *           read_directory_data
   *
   * Read the full contents of a directory, using one of the above helper functions.
   */
  static NTSTATUS read_directory_data( struct dir_data *data, int fd, const UNICODE_STRING *mask )
  {
      NTSTATUS status;
  
  #ifdef VFAT_IOCTL_READDIR_BOTH
      if (!(status = read_directory_data_vfat( data, fd, mask ))) return status;
  #endif
  
      if (!has_wildcard( mask ))
      {
          /* convert the mask to a Unix name and check for it */
          char unix_name[MAX_DIR_ENTRY_LEN * 3 + 1];
          int ret = ntdll_wcstoumbs( mask->Buffer, mask->Length / sizeof(WCHAR),
                                     unix_name, sizeof(unix_name) - 1, TRUE );
          if (ret > 0)
          {
              unix_name[ret] = 0;
  #ifdef HAVE_GETATTRLIST
              if (!(status = read_directory_data_getattrlist( data, unix_name ))) return status;
  #endif
              if (!(status = read_directory_data_stat( data, unix_name ))) return status;
          }
      }
  
      return read_directory_data_readdir( data, mask );
  }
  
  
  /* compare file names for directory sorting */
  static int name_compare( const void *a, const void *b )
  {
      const struct dir_data_names *file_a = (const struct dir_data_names *)a;
      const struct dir_data_names *file_b = (const struct dir_data_names *)b;
      int ret = wcsicmp( file_a->long_name, file_b->long_name );
      if (!ret) ret = wcscmp( file_a->long_name, file_b->long_name );
      return ret;
  }
  
  
  /***********************************************************************
   *           init_cached_dir_data
   *
   * Initialize the cached directory contents.
   */
  static NTSTATUS init_cached_dir_data( struct dir_data **data_ret, int fd, const UNICODE_STRING *mask )
  {
      struct dir_data *data;
      struct stat st;
      NTSTATUS status;
      unsigned int i;
  
      if (!(data = calloc( 1, sizeof(*data) ))) return STATUS_NO_MEMORY;
  
      if ((status = read_directory_data( data, fd, mask )))
      {
          free_dir_data( data );
          return status;
      }
  
      /* sort filenames, but not "." and ".." */
      i = 0;
      if (i < data->count && !strcmp( data->names[i].unix_name, "." )) i++;
      if (i < data->count && !strcmp( data->names[i].unix_name, ".." )) i++;
      if (i < data->count) qsort( data->names + i, data->count - i, sizeof(*data->names), name_compare );
  
      if (data->count)
      {
          fstat( fd, &st );
          data->id.dev = st.st_dev;
          data->id.ino = st.st_ino;
      }
  
      TRACE( "mask %s found %u files\n", debugstr_us( mask ), data->count );
      for (i = 0; i < data->count; i++)
          TRACE( "%s %s\n", debugstr_w(data->names[i].long_name), debugstr_w(data->names[i].short_name) );
  
      *data_ret = data;
      return data->count ? STATUS_SUCCESS : STATUS_NO_SUCH_FILE;
  }
  
  
  /***********************************************************************
   *           get_cached_dir_data
   *
   * Retrieve the cached directory data, or initialize it if necessary.
   */
  static NTSTATUS get_cached_dir_data( HANDLE handle, struct dir_data **data_ret, int fd,
                                       const UNICODE_STRING *mask )
  {
      unsigned int i;
      int entry = -1, free_entries[16];
      NTSTATUS status;
  
      SERVER_START_REQ( get_directory_cache_entry )
      {
          req->handle = wine_server_obj_handle( handle );
          wine_server_set_reply( req, free_entries, sizeof(free_entries) );
          if (!(status = wine_server_call( req ))) entry = reply->entry;
  
          for (i = 0; i < wine_server_reply_size( reply ) / sizeof(*free_entries); i++)
          {
              int free_idx = free_entries[i];
              if (free_idx < dir_data_cache_size)
              {
                  free_dir_data( dir_data_cache[free_idx] );
                  dir_data_cache[free_idx] = NULL;
              }
          }
      }
      SERVER_END_REQ;
  
      if (status)
      {
          if (status == STATUS_SHARING_VIOLATION) FIXME( "shared directory handle not supported yet\n" );
          return status;
      }
  
      if (entry >= dir_data_cache_size)
      {
          unsigned int size = max( dir_data_cache_initial_size, max( dir_data_cache_size * 2, entry + 1 ) );
          struct dir_data **new_cache = realloc( dir_data_cache, size * sizeof(*new_cache) );
  
          if (!new_cache) return STATUS_NO_MEMORY;
          memset( new_cache + dir_data_cache_size, 0, (size - dir_data_cache_size) * sizeof(*new_cache) );
          dir_data_cache = new_cache;
          dir_data_cache_size = size;
      }
  
      if (!dir_data_cache[entry]) status = init_cached_dir_data( &dir_data_cache[entry], fd, mask );
  
      *data_ret = dir_data_cache[entry];
      return status;
  }
  
  
  /******************************************************************************
   *              NtQueryDirectoryFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtQueryDirectoryFile( HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc_routine,
                                        void *apc_context, IO_STATUS_BLOCK *io, void *buffer, ULONG length,
                                        FILE_INFORMATION_CLASS info_class, BOOLEAN single_entry,
                                        UNICODE_STRING *mask, BOOLEAN restart_scan )
  {
      int cwd, fd, needs_close;
      enum server_fd_type type;
      struct dir_data *data;
      NTSTATUS status;
  
      TRACE("(%p %p %p %p %p %p 0x%08x 0x%08x 0x%08x %s 0x%08x\n",
            handle, event, apc_routine, apc_context, io, buffer,
            length, info_class, single_entry, debugstr_us(mask),
            restart_scan);
  
      if (event || apc_routine)
      {
          FIXME( "Unsupported yet option\n" );
          return STATUS_NOT_IMPLEMENTED;
      }
      switch (info_class)
      {
      case FileDirectoryInformation:
      case FileBothDirectoryInformation:
      case FileFullDirectoryInformation:
      case FileIdBothDirectoryInformation:
      case FileIdFullDirectoryInformation:
      case FileIdGlobalTxDirectoryInformation:
      case FileNamesInformation:
          if (length < dir_info_align( dir_info_size( info_class, 1 ))) return STATUS_INFO_LENGTH_MISMATCH;
          break;
      case FileObjectIdInformation:
          if (length != sizeof(FILE_OBJECTID_INFORMATION)) return STATUS_INFO_LENGTH_MISMATCH;
          return STATUS_INVALID_INFO_CLASS;
      case FileQuotaInformation:
          if (length != sizeof(FILE_QUOTA_INFORMATION)) return STATUS_INFO_LENGTH_MISMATCH;
          return STATUS_INVALID_INFO_CLASS;
      case FileReparsePointInformation:
          if (length != sizeof(FILE_REPARSE_POINT_INFORMATION)) return STATUS_INFO_LENGTH_MISMATCH;
          return STATUS_INVALID_INFO_CLASS;
      default:
          return STATUS_INVALID_INFO_CLASS;
      }
      if (!buffer) return STATUS_ACCESS_VIOLATION;
  
      if ((status = server_get_unix_fd( handle, FILE_LIST_DIRECTORY, &fd, &needs_close, &type, NULL )))
          return status;
  
      if (type != FD_TYPE_DIR)
      {
          if (needs_close) close( fd );
          return STATUS_INVALID_PARAMETER;
      }
  
      io->Information = 0;
  
      pthread_mutex_lock( &dir_mutex );
  
      cwd = open( ".", O_RDONLY );
      if (fchdir( fd ) != -1)
      {
          if (!(status = get_cached_dir_data( handle, &data, fd, mask )))
          {
              union file_directory_info *last_info = NULL;
  
              if (restart_scan) data->pos = 0;
  
              while (!status && data->pos < data->count)
              {
                  status = get_dir_data_entry( data, buffer, io, length, info_class, &last_info );
                  if (!status || status == STATUS_BUFFER_OVERFLOW) data->pos++;
                  if (single_entry && last_info) break;
              }
  
              if (!last_info) status = STATUS_NO_MORE_FILES;
              else if (status == STATUS_MORE_ENTRIES) status = STATUS_SUCCESS;
  
              io->u.Status = status;
          }
          if (cwd == -1 || fchdir( cwd ) == -1) chdir( "/" );
      }
      else status = STATUS_ACCESS_DENIED;
  
      pthread_mutex_unlock( &dir_mutex );
  
      if (needs_close) close( fd );
      if (cwd != -1) close( cwd );
      TRACE( "=> %x (%ld)\n", status, io->Information );
      return status;
  }
  
  
  /***********************************************************************
   *           find_file_in_dir
   *
   * Find a file in a directory the hard way, by doing a case-insensitive search.
   * The file found is appended to unix_name at pos.
   * There must be at least MAX_DIR_ENTRY_LEN+2 chars available at pos.
   */
  static NTSTATUS find_file_in_dir( char *unix_name, int pos, const WCHAR *name, int length,
                                    BOOLEAN check_case, BOOLEAN *is_win_dir )
  {
      WCHAR buffer[MAX_DIR_ENTRY_LEN];
      BOOLEAN is_name_8_dot_3;
      DIR *dir;
      struct dirent *de;
      struct stat st;
      int ret;
  
      /* try a shortcut for this directory */
  
      unix_name[pos++] = '/';
      ret = ntdll_wcstoumbs( name, length, unix_name + pos, MAX_DIR_ENTRY_LEN + 1, TRUE );
      if (ret >= 0 && ret <= MAX_DIR_ENTRY_LEN)
      {
          unix_name[pos + ret] = 0;
          if (!lstat( unix_name, &st ))
          {
              if (is_win_dir) *is_win_dir = is_same_file( &windir, &st );
              return STATUS_SUCCESS;
          }
      }
      if (check_case) goto not_found;  /* we want an exact match */
  
      if (pos > 1) unix_name[pos - 1] = 0;
      else unix_name[1] = 0;  /* keep the initial slash */
  
      /* check if it fits in 8.3 so that we don't look for short names if we won't need them */
  
      is_name_8_dot_3 = is_legal_8dot3_name( name, length );
  #ifndef VFAT_IOCTL_READDIR_BOTH
      is_name_8_dot_3 = is_name_8_dot_3 && length >= 8 && name[4] == '~';
  #endif
  
      if (!is_name_8_dot_3 && !get_dir_case_sensitivity( unix_name )) goto not_found;
  
      /* now look for it through the directory */
  
  #ifdef VFAT_IOCTL_READDIR_BOTH
      if (is_name_8_dot_3)
      {
          int fd = open( unix_name, O_RDONLY | O_DIRECTORY );
          if (fd != -1)
          {
              KERNEL_DIRENT kde[2];
  
              if (ioctl( fd, VFAT_IOCTL_READDIR_BOTH, (long)kde ) != -1)
              {
                  unix_name[pos - 1] = '/';
                  while (kde[0].d_reclen)
                  {
                      if (kde[1].d_name[0])
                      {
                          ret = ntdll_umbstowcs( kde[1].d_name, strlen(kde[1].d_name),
                                                 buffer, MAX_DIR_ENTRY_LEN );
                          if (ret == length && !wcsnicmp( buffer, name, ret ))
                          {
                              strcpy( unix_name + pos, kde[1].d_name );
                              close( fd );
                              goto success;
                          }
                      }
                      ret = ntdll_umbstowcs( kde[0].d_name, strlen(kde[0].d_name),
                                             buffer, MAX_DIR_ENTRY_LEN );
                      if (ret == length && !wcsnicmp( buffer, name, ret ))
                      {
                          strcpy( unix_name + pos,
                                  kde[1].d_name[0] ? kde[1].d_name : kde[0].d_name );
                          close( fd );
                          goto success;
                      }
                      if (ioctl( fd, VFAT_IOCTL_READDIR_BOTH, (long)kde ) == -1)
                      {
                          close( fd );
                          goto not_found;
                      }
                  }
              }
              close( fd );
          }
          /* fall through to normal handling */
      }
  #endif /* VFAT_IOCTL_READDIR_BOTH */
  
      if (!(dir = opendir( unix_name )))
      {
          if (errno == ENOENT) return STATUS_OBJECT_PATH_NOT_FOUND;
          else return STATUS_ACCESS_DENIED;
      }
      unix_name[pos - 1] = '/';
      while ((de = readdir( dir )))
      {
          ret = ntdll_umbstowcs( de->d_name, strlen(de->d_name), buffer, MAX_DIR_ENTRY_LEN );
          if (ret == length && !wcsnicmp( buffer, name, ret ))
          {
              strcpy( unix_name + pos, de->d_name );
              closedir( dir );
              goto success;
          }
  
          if (!is_name_8_dot_3) continue;
  
          if (!is_legal_8dot3_name( buffer, ret ))
          {
              WCHAR short_nameW[12];
              ret = hash_short_file_name( buffer, ret, short_nameW );
              if (ret == length && !wcsnicmp( short_nameW, name, length ))
              {
                  strcpy( unix_name + pos, de->d_name );
                  closedir( dir );
                  goto success;
              }
          }
      }
      closedir( dir );
  
  not_found:
      unix_name[pos - 1] = 0;
      return STATUS_OBJECT_PATH_NOT_FOUND;
  
  success:
      if (is_win_dir && !lstat( unix_name, &st )) *is_win_dir = is_same_file( &windir, &st );
      return STATUS_SUCCESS;
  }
  
  
  #ifndef _WIN64
  
  static const WCHAR catrootW[] = {'s','y','s','t','e','m','3','2','\\','c','a','t','r','o','o','t',0};
  static const WCHAR catroot2W[] = {'s','y','s','t','e','m','3','2','\\','c','a','t','r','o','o','t','2',0};
  static const WCHAR driversstoreW[] = {'s','y','s','t','e','m','3','2','\\','d','r','i','v','e','r','s','s','t','o','r','e',0};
  static const WCHAR driversetcW[] = {'s','y','s','t','e','m','3','2','\\','d','r','i','v','e','r','s','\\','e','t','c',0};
  static const WCHAR logfilesW[] = {'s','y','s','t','e','m','3','2','\\','l','o','g','f','i','l','e','s',0};
  static const WCHAR spoolW[] = {'s','y','s','t','e','m','3','2','\\','s','p','o','o','l',0};
  static const WCHAR system32W[] = {'s','y','s','t','e','m','3','2',0};
  static const WCHAR sysnativeW[] = {'s','y','s','n','a','t','i','v','e',0};
  static const WCHAR regeditW[] = {'r','e','g','e','d','i','t','.','e','x','e',0};
  
  static struct
  {
      const WCHAR *source;
      const char *unix_target;
  } redirects[] =
  {
      { catrootW, NULL },
      { catroot2W, NULL },
      { driversstoreW, NULL },
      { driversetcW, NULL },
      { logfilesW, NULL },
      { spoolW, NULL },
      { system32W, "syswow64" },
      { sysnativeW, "system32" },
      { regeditW, "syswow64/regedit.exe" }
  };
  
  static unsigned int nb_redirects;
  
  
  /***********************************************************************
   *           init_redirects
   */
  static void init_redirects(void)
  {
      static const char windows_dir[] = "/dosdevices/c:/windows";
      char *dir;
      struct stat st;
  
      if (!(dir = malloc( strlen(config_dir) + sizeof(windows_dir) ))) return;
      strcpy( dir, config_dir );
      strcat( dir, windows_dir );
      if (!stat( dir, &st ))
      {
          windir.dev = st.st_dev;
          windir.ino = st.st_ino;
          nb_redirects = ARRAY_SIZE( redirects );
      }
      else ERR( "%s: %s\n", dir, strerror(errno) );
      free( dir );
  
  }
  
  
  /***********************************************************************
   *           match_redirect
   *
   * Check if path matches a redirect name. If yes, return matched length.
   */
  static int match_redirect( const WCHAR *path, int len, const WCHAR *redir, BOOLEAN check_case )
  {
      int i = 0;
  
      while (i < len)
      {
          int start = i;
          while (i < len && !IS_SEPARATOR(path[i])) i++;
          if (check_case)
          {
              if (wcsncmp( path + start, redir, i - start )) return 0;
          }
          else
          {
              if (wcsnicmp( path + start, redir, i - start )) return 0;
          }
          redir += i - start;
          while (i < len && IS_SEPARATOR(path[i])) i++;
          if (!*redir) return i;
          if (*redir++ != '\\') return 0;
      }
      return 0;
  }
  
  
  /***********************************************************************
   *           get_redirect_path
   *
   * Retrieve the Unix path corresponding to a redirected path if any.
   */
  static int get_redirect_path( char *unix_name, int pos, const WCHAR *name, int length, BOOLEAN check_case )
  {
      unsigned int i;
      int len;
  
      for (i = 0; i < nb_redirects; i++)
      {
          if ((len = match_redirect( name, length, redirects[i].source, check_case )))
          {
              if (!redirects[i].unix_target) break;
              unix_name[pos++] = '/';
              strcpy( unix_name + pos, redirects[i].unix_target );
              return len;
          }
      }
      return 0;
  }
  
  #else  /* _WIN64 */
  
  /* there are no redirects on 64-bit */
  
  static const unsigned int nb_redirects = 0;
  
  static int get_redirect_path( char *unix_name, int pos, const WCHAR *name, int length, BOOLEAN check_case )
  {
      return 0;
  }
  
  #endif
  
  /***********************************************************************
   *           init_files
   */
  void init_files(void)
  {
  #ifndef _WIN64
      if (is_wow64) init_redirects();
  #endif
      /* a couple of directories that we don't want to return in directory searches */
      ignore_file( config_dir );
      ignore_file( "/dev" );
      ignore_file( "/proc" );
  #ifdef linux
      ignore_file( "/sys" );
  #endif
      /* retrieve initial umask */
      start_umask = umask( 0777 );
      umask( start_umask );
  }
  
  
  /******************************************************************************
   *           get_dos_device
   *
   * Get the Unix path of a DOS device.
   */
  static NTSTATUS get_dos_device( const WCHAR *name, UINT name_len, char **unix_name_ret )
  {
      struct stat st;
      char *unix_name, *new_name, *dev;
      unsigned int i;
      int unix_len;
  
      /* make sure the device name is ASCII */
      for (i = 0; i < name_len; i++)
          if (name[i] <= 32 || name[i] >= 127) return STATUS_BAD_DEVICE_TYPE;
  
      unix_len = strlen(config_dir) + sizeof("/dosdevices/") + name_len + 1;
  
      if (!(unix_name = malloc( unix_len ))) return STATUS_NO_MEMORY;
  
      strcpy( unix_name, config_dir );
      strcat( unix_name, "/dosdevices/" );
      dev = unix_name + strlen(unix_name);
  
      for (i = 0; i < name_len; i++) dev[i] = (name[i] >= 'A' && name[i] <= 'Z' ? name[i] + 32 : name[i]);
      dev[i] = 0;
  
      /* special case for drive devices */
      if (name_len == 2 && dev[1] == ':')
      {
          dev[i++] = ':';
          dev[i] = 0;
      }
  
      for (;;)
      {
          if (!stat( unix_name, &st ))
          {
              TRACE( "%s -> %s\n", debugstr_wn(name,name_len), debugstr_a(unix_name) );
              *unix_name_ret = unix_name;
              return STATUS_SUCCESS;
          }
          if (!dev) break;
  
          /* now try some defaults for it */
          if (!strcmp( dev, "aux" ))
          {
              strcpy( dev, "com1" );
              continue;
          }
          if (!strcmp( dev, "prn" ))
          {
              strcpy( dev, "lpt1" );
              continue;
          }
  
          new_name = NULL;
          if (dev[1] == ':' && dev[2] == ':')  /* drive device */
          {
              dev[2] = 0;  /* remove last ':' to get the drive mount point symlink */
              new_name = get_default_drive_device( unix_name );
          }
  
          if (!new_name) break;
          free( unix_name );
          unix_name = new_name;
          unix_len = strlen(unix_name) + 1;
          dev = NULL; /* last try */
      }
      free( unix_name );
      return STATUS_BAD_DEVICE_TYPE;
  }
  
  
  /* return the length of the DOS namespace prefix if any */
  static inline int get_dos_prefix_len( const UNICODE_STRING *name )
  {
      static const WCHAR nt_prefixW[] = {'\\','?','?','\\'};
      static const WCHAR dosdev_prefixW[] = {'\\','D','o','s','D','e','v','i','c','e','s','\\'};
  
      if (name->Length >= sizeof(nt_prefixW) &&
          !memcmp( name->Buffer, nt_prefixW, sizeof(nt_prefixW) ))
          return ARRAY_SIZE( nt_prefixW );
  
      if (name->Length >= sizeof(dosdev_prefixW) &&
          !wcsnicmp( name->Buffer, dosdev_prefixW, ARRAY_SIZE( dosdev_prefixW )))
          return ARRAY_SIZE( dosdev_prefixW );
  
      return 0;
  }
  
  
  /***********************************************************************
   *           remove_last_componentA
   *
   * Remove the last component of the path. Helper for find_drive_rootA.
   */
  static inline unsigned int remove_last_componentA( const char *path, unsigned int len )
  {
      int level = 0;
  
      while (level < 1)
      {
          /* find start of the last path component */
          unsigned int prev = len;
          if (prev <= 1) break;  /* reached root */
          while (prev > 1 && path[prev - 1] != '/') prev--;
          /* does removing it take us up a level? */
          if (len - prev != 1 || path[prev] != '.')  /* not '.' */
          {
              if (len - prev == 2 && path[prev] == '.' && path[prev+1] == '.')  /* is it '..'? */
                  level--;
              else
                  level++;
          }
          /* strip off trailing slashes */
          while (prev > 1 && path[prev - 1] == '/') prev--;
          len = prev;
      }
      return len;
  }
  
  
  /***********************************************************************
   *           find_drive_rootA
   *
   * Find a drive for which the root matches the beginning of the given path.
   * This can be used to translate a Unix path into a drive + DOS path.
   * Return value is the drive, or -1 on error. On success, ppath is modified
   * to point to the beginning of the DOS path.
   */
  static NTSTATUS find_drive_rootA( LPCSTR *ppath, unsigned int len, int *drive_ret )
  {
      /* Starting with the full path, check if the device and inode match any of
       * the wine 'drives'. If not then remove the last path component and try
       * again. If the last component was a '..' then skip a normal component
       * since it's a directory that's ascended back out of.
       */
      int drive;
      char *buffer;
      const char *path = *ppath;
      struct stat st;
      struct file_identity info[MAX_DOS_DRIVES];
  
      /* get device and inode of all drives */
      if (!get_drives_info( info )) return STATUS_OBJECT_PATH_NOT_FOUND;
  
      /* strip off trailing slashes */
      while (len > 1 && path[len - 1] == '/') len--;
  
      /* make a copy of the path */
      if (!(buffer = malloc( len + 1 ))) return STATUS_NO_MEMORY;
      memcpy( buffer, path, len );
      buffer[len] = 0;
  
      for (;;)
      {
          if (!stat( buffer, &st ) && S_ISDIR( st.st_mode ))
          {
              /* Find the drive */
              for (drive = 0; drive < MAX_DOS_DRIVES; drive++)
              {
                  if ((info[drive].dev == st.st_dev) && (info[drive].ino == st.st_ino))
                  {
                      if (len == 1) len = 0;  /* preserve root slash in returned path */
                      TRACE( "%s -> drive %c:, root=%s, name=%s\n",
                             debugstr_a(path), 'A' + drive, debugstr_a(buffer), debugstr_a(path + len));
                      *ppath += len;
                      *drive_ret = drive;
                      free( buffer );
                      return STATUS_SUCCESS;
                  }
              }
          }
          if (len <= 1) break;  /* reached root */
          len = remove_last_componentA( buffer, len );
          buffer[len] = 0;
      }
      free( buffer );
      return STATUS_OBJECT_PATH_NOT_FOUND;
  }
  
  
  /******************************************************************************
   *           find_file_id
   *
   * Recursively search directories from the dir queue for a given inode.
   */
  static NTSTATUS find_file_id( char **unix_name, ULONG *len, ULONGLONG file_id, dev_t dev )
  {
      unsigned int pos;
      DIR *dir;
      struct dirent *de;
      NTSTATUS status;
      struct stat st;
      char *name = *unix_name;
  
      while (!(status = next_dir_in_queue( name )))
      {
          if (!(dir = opendir( name ))) continue;
          TRACE( "searching %s for %s\n", debugstr_a(name), wine_dbgstr_longlong(file_id) );
          pos = strlen( name );
          if (pos + MAX_DIR_ENTRY_LEN >= *len / sizeof(WCHAR))
          {
              if (!(name = realloc( name, *len * 2 )))
              {
                  closedir( dir );
                  return STATUS_NO_MEMORY;
              }
              *len *= 2;
              *unix_name = name;
          }
          name[pos++] = '/';
          while ((de = readdir( dir )))
          {
              if (!strcmp( de->d_name, "." ) || !strcmp( de->d_name, ".." )) continue;
              strcpy( name + pos, de->d_name );
              if (lstat( name, &st ) == -1) continue;
              if (st.st_dev != dev) continue;
              if (st.st_ino == file_id)
              {
                  closedir( dir );
                  return STATUS_SUCCESS;
              }
              if (!S_ISDIR( st.st_mode )) continue;
              if ((status = add_dir_to_queue( name )) != STATUS_SUCCESS)
              {
                  closedir( dir );
                  return status;
              }
          }
          closedir( dir );
      }
      return status;
  }
  
  
  /******************************************************************************
   *           file_id_to_unix_file_name
   *
   * Lookup a file from its file id instead of its name.
   */
  static NTSTATUS file_id_to_unix_file_name( const OBJECT_ATTRIBUTES *attr, char **unix_name_ret )
  {
      enum server_fd_type type;
      int old_cwd, root_fd, needs_close;
      char *unix_name;
      ULONG len;
      NTSTATUS status;
      ULONGLONG file_id;
      struct stat st, root_st;
  
      if (attr->ObjectName->Length != sizeof(ULONGLONG)) return STATUS_OBJECT_PATH_SYNTAX_BAD;
      if (!attr->RootDirectory) return STATUS_INVALID_PARAMETER;
      memcpy( &file_id, attr->ObjectName->Buffer, sizeof(file_id) );
  
      len = 2 * MAX_DIR_ENTRY_LEN + 4;
      if (!(unix_name = malloc( len ))) return STATUS_NO_MEMORY;
      strcpy( unix_name, "." );
  
      if ((status = server_get_unix_fd( attr->RootDirectory, 0, &root_fd, &needs_close, &type, NULL )))
          goto done;
  
      if (type != FD_TYPE_DIR)
      {
          status = STATUS_OBJECT_TYPE_MISMATCH;
          goto done;
      }
  
      fstat( root_fd, &root_st );
      if (root_st.st_ino == file_id)  /* shortcut for "." */
      {
          status = STATUS_SUCCESS;
          goto done;
      }
  
      pthread_mutex_lock( &dir_mutex );
      if ((old_cwd = open( ".", O_RDONLY )) != -1 && fchdir( root_fd ) != -1)
      {
          /* shortcut for ".." */
          if (!stat( "..", &st ) && st.st_dev == root_st.st_dev && st.st_ino == file_id)
          {
              strcpy( unix_name, ".." );
              status = STATUS_SUCCESS;
          }
          else
          {
              status = add_dir_to_queue( "." );
              if (!status)
                  status = find_file_id( &unix_name, &len, file_id, root_st.st_dev );
              if (!status)  /* get rid of "./" prefix */
                  memmove( unix_name, unix_name + 2, strlen(unix_name) - 1 );
              flush_dir_queue();
          }
          if (fchdir( old_cwd ) == -1) chdir( "/" );
      }
      else status = STATUS_ACCESS_DENIED;
      pthread_mutex_unlock( &dir_mutex );
      if (old_cwd != -1) close( old_cwd );
  
  done:
      if (status == STATUS_SUCCESS)
      {
          TRACE( "%s -> %s\n", wine_dbgstr_longlong(file_id), debugstr_a(unix_name) );
          *unix_name_ret = unix_name;
      }
      else
      {
          TRACE( "%s not found in dir %p\n", wine_dbgstr_longlong(file_id), attr->RootDirectory );
          free( unix_name );
      }
      if (needs_close) close( root_fd );
      return status;
  }
  
  
  /******************************************************************************
   *           lookup_unix_name
   *
   * Helper for nt_to_unix_file_name
   */
  static NTSTATUS lookup_unix_name( const WCHAR *name, int name_len, char **buffer, int unix_len, int pos,
                                    UINT disposition, BOOLEAN check_case )
  {
      NTSTATUS status;
      int ret, len;
      struct stat st;
      char *unix_name = *buffer;
      const BOOL redirect = nb_redirects && ntdll_get_thread_data()->wow64_redir;
  
      /* try a shortcut first */
  
      while (name_len && IS_SEPARATOR(*name))
      {
          name++;
          name_len--;
      }
  
      unix_name[pos] = '/';
      ret = ntdll_wcstoumbs( name, name_len, unix_name + pos + 1, unix_len - pos - 1, TRUE );
      if (ret >= 0 && ret < unix_len - pos - 1)
      {
          char *p;
          unix_name[pos + 1 + ret] = 0;
          for (p = unix_name + pos ; *p; p++) if (*p == '\\') *p = '/';
          if (!name_len || !redirect || (!strstr( unix_name, "/windows/") && strncmp( unix_name, "windows/", 8 )))
          {
              if (!lstat( unix_name, &st ))
              {
                  if (disposition == FILE_CREATE)
                      return STATUS_OBJECT_NAME_COLLISION;
                  return STATUS_SUCCESS;
              }
          }
      }
  
      if (!name_len)  /* empty name -> drive root doesn't exist */
          return STATUS_OBJECT_PATH_NOT_FOUND;
      if (check_case && !redirect && (disposition == FILE_OPEN || disposition == FILE_OVERWRITE))
          return STATUS_OBJECT_NAME_NOT_FOUND;
  
      /* now do it component by component */
  
      while (name_len)
      {
          const WCHAR *end, *next;
          BOOLEAN is_win_dir = FALSE;
  
          end = name;
          while (end < name + name_len && !IS_SEPARATOR(*end)) end++;
          next = end;
          while (next < name + name_len && IS_SEPARATOR(*next)) next++;
          name_len -= next - name;
  
          /* grow the buffer if needed */
  
          if (unix_len - pos < MAX_DIR_ENTRY_LEN + 2)
          {
              char *new_name;
              unix_len += 2 * MAX_DIR_ENTRY_LEN;
              if (!(new_name = realloc( unix_name, unix_len ))) return STATUS_NO_MEMORY;
              unix_name = *buffer = new_name;
          }
  
          status = find_file_in_dir( unix_name, pos, name, end - name,
                                     check_case, redirect ? &is_win_dir : NULL );
  
          /* if this is the last element, not finding it is not necessarily fatal */
          if (!name_len)
          {
              if (status == STATUS_OBJECT_PATH_NOT_FOUND)
              {
                  status = STATUS_OBJECT_NAME_NOT_FOUND;
                  if (disposition != FILE_OPEN && disposition != FILE_OVERWRITE)
                  {
                      ret = ntdll_wcstoumbs( name, end - name, unix_name + pos + 1, MAX_DIR_ENTRY_LEN + 1, TRUE );
                      if (ret > 0 && ret <= MAX_DIR_ENTRY_LEN)
                      {
                          unix_name[pos] = '/';
                          unix_name[pos + 1 + ret] = 0;
                          status = STATUS_NO_SUCH_FILE;
                          break;
                      }
                  }
              }
              else if (status == STATUS_SUCCESS && disposition == FILE_CREATE)
              {
                  status = STATUS_OBJECT_NAME_COLLISION;
              }
          }
          else if (disposition == FILE_WINE_PATH && status == STATUS_OBJECT_PATH_NOT_FOUND)
          {
              ret = ntdll_wcstoumbs( name, end - name, unix_name + pos + 1, MAX_DIR_ENTRY_LEN + 1, TRUE );
              if (ret > 0 && ret <= MAX_DIR_ENTRY_LEN)
              {
                  unix_name[pos] = '/';
                  unix_name[pos + 1 + ret] = 0;
                  status = STATUS_NO_SUCH_FILE;
                  pos += strlen( unix_name + pos );
                  name = next;
                  continue;
              }
          }
  
          if (status != STATUS_SUCCESS) break;
  
          pos += strlen( unix_name + pos );
          name = next;
  
          if (is_win_dir && (len = get_redirect_path( unix_name, pos, name, name_len, check_case )))
          {
              name += len;
              name_len -= len;
              pos += strlen( unix_name + pos );
              TRACE( "redirecting -> %s + %s\n", debugstr_a(unix_name), debugstr_w(name) );
          }
      }
  
      return status;
  }
  
  
  /******************************************************************************
   *           nt_to_unix_file_name_attr
   */
  static NTSTATUS nt_to_unix_file_name_attr( const OBJECT_ATTRIBUTES *attr, char **name_ret,
                                             UINT disposition )
  {
      static const WCHAR invalid_charsW[] = { INVALID_NT_CHARS, 0 };
      enum server_fd_type type;
      int old_cwd, root_fd, needs_close;
      const WCHAR *name, *p;
      char *unix_name;
      int name_len, unix_len;
      NTSTATUS status;
  
      if (!attr->ObjectName->Buffer && attr->ObjectName->Length)
          return STATUS_ACCESS_VIOLATION;
  
      if (!attr->RootDirectory)  /* without root dir fall back to normal lookup */
      {
          if (!attr->ObjectName->Buffer)
              return STATUS_OBJECT_PATH_SYNTAX_BAD;
  
          return nt_to_unix_file_name( attr->ObjectName, name_ret, disposition );
      }
  
      name     = attr->ObjectName->Buffer;
      name_len = attr->ObjectName->Length / sizeof(WCHAR);
  
      if (name_len && IS_SEPARATOR(name[0])) return STATUS_INVALID_PARAMETER;
  
      /* check for invalid characters */
      for (p = name; p < name + name_len; p++)
          if (*p < 32 || wcschr( invalid_charsW, *p )) return STATUS_OBJECT_NAME_INVALID;
  
      unix_len = name_len * 3 + MAX_DIR_ENTRY_LEN + 3;
      if (!(unix_name = malloc( unix_len ))) return STATUS_NO_MEMORY;
      unix_name[0] = '.';
  
      if (!(status = server_get_unix_fd( attr->RootDirectory, 0, &root_fd, &needs_close, &type, NULL )))
      {
          if (type != FD_TYPE_DIR)
          {
              if (needs_close) close( root_fd );
              status = STATUS_BAD_DEVICE_TYPE;
          }
          else
          {
              pthread_mutex_lock( &dir_mutex );
              if ((old_cwd = open( ".", O_RDONLY )) != -1 && fchdir( root_fd ) != -1)
              {
                  status = lookup_unix_name( name, name_len, &unix_name, unix_len, 1,
                                             disposition, FALSE );
                  if (fchdir( old_cwd ) == -1) chdir( "/" );
              }
              else status = STATUS_ACCESS_DENIED;
              pthread_mutex_unlock( &dir_mutex );
              if (old_cwd != -1) close( old_cwd );
              if (needs_close) close( root_fd );
          }
      }
      else if (status == STATUS_OBJECT_TYPE_MISMATCH) status = STATUS_BAD_DEVICE_TYPE;
  
      if (status == STATUS_SUCCESS || status == STATUS_NO_SUCH_FILE)
      {
          TRACE( "%s -> %s\n", debugstr_us(attr->ObjectName), debugstr_a(unix_name) );
          *name_ret = unix_name;
      }
      else
      {
          TRACE( "%s not found in %s\n", debugstr_w(name), unix_name );
          free( unix_name );
      }
      return status;
  }
  
  
  /******************************************************************************
   *           nt_to_unix_file_name
   *
   * Convert a file name from NT namespace to Unix namespace.
   *
   * If disposition is not FILE_OPEN or FILE_OVERWRITE, the last path
   * element doesn't have to exist; in that case STATUS_NO_SUCH_FILE is
   * returned, but the unix name is still filled in properly.
   */
  NTSTATUS nt_to_unix_file_name( const UNICODE_STRING *nameW, char **unix_name_ret, UINT disposition )
  {
      static const WCHAR unixW[] = {'u','n','i','x'};
      static const WCHAR invalid_charsW[] = { INVALID_NT_CHARS, 0 };
  
      NTSTATUS status = STATUS_SUCCESS;
      const WCHAR *name, *p;
      struct stat st;
      char *unix_name;
      int pos, ret, name_len, unix_len, prefix_len;
      WCHAR prefix[MAX_DIR_ENTRY_LEN + 1];
      BOOLEAN check_case = FALSE;
      BOOLEAN is_unix = FALSE;
  
      name     = nameW->Buffer;
      name_len = nameW->Length / sizeof(WCHAR);
  
      if (!name_len || !IS_SEPARATOR(name[0])) return STATUS_OBJECT_PATH_SYNTAX_BAD;
  
      if (!(pos = get_dos_prefix_len( nameW )))
          return STATUS_BAD_DEVICE_TYPE;  /* no DOS prefix, assume NT native name */
  
      name += pos;
      name_len -= pos;
  
      if (!name_len) return STATUS_OBJECT_NAME_INVALID;
  
      /* check for sub-directory */
      for (pos = 0; pos < name_len && pos <= MAX_DIR_ENTRY_LEN; pos++)
      {
          if (IS_SEPARATOR(name[pos])) break;
          if (name[pos] < 32 || wcschr( invalid_charsW, name[pos] ))
              return STATUS_OBJECT_NAME_INVALID;
          prefix[pos] = (name[pos] >= 'A' && name[pos] <= 'Z') ? name[pos] + 'a' - 'A' : name[pos];
      }
      if (pos > MAX_DIR_ENTRY_LEN) return STATUS_OBJECT_NAME_INVALID;
  
      if (pos == name_len)  /* no subdir, plain DOS device */
          return get_dos_device( name, name_len, unix_name_ret );
  
      prefix_len = pos;
      prefix[prefix_len] = 0;
  
      name += prefix_len;
      name_len -= prefix_len;
  
      /* check for invalid characters (all chars except 0 are valid for unix) */
      is_unix = (prefix_len == 4 && !memcmp( prefix, unixW, sizeof(unixW) ));
      if (is_unix)
      {
          for (p = name; p < name + name_len; p++)
              if (!*p) return STATUS_OBJECT_NAME_INVALID;
          check_case = TRUE;
      }
      else
      {
          for (p = name; p < name + name_len; p++)
              if (*p < 32 || wcschr( invalid_charsW, *p )) return STATUS_OBJECT_NAME_INVALID;
      }
  
      unix_len = (prefix_len + name_len) * 3 + MAX_DIR_ENTRY_LEN + 3;
      unix_len += strlen(config_dir) + sizeof("/dosdevices/");
      if (!(unix_name = malloc( unix_len ))) return STATUS_NO_MEMORY;
      strcpy( unix_name, config_dir );
      strcat( unix_name, "/dosdevices/" );
      pos = strlen(unix_name);
  
      ret = ntdll_wcstoumbs( prefix, prefix_len, unix_name + pos, unix_len - pos - 1, TRUE );
      if (ret <= 0)
      {
          free( unix_name );
          return STATUS_OBJECT_NAME_INVALID;
      }
      pos += ret;
  
      /* check if prefix exists (except for DOS drives to avoid extra stat calls) */
  
      if (prefix_len != 2 || prefix[1] != ':')
      {
          unix_name[pos] = 0;
          if (lstat( unix_name, &st ) == -1 && errno == ENOENT)
          {
              if (!is_unix)
              {
                  free( unix_name );
                  return STATUS_BAD_DEVICE_TYPE;
              }
              pos = 0;  /* fall back to unix root */
          }
      }
  
      status = lookup_unix_name( name, name_len, &unix_name, unix_len, pos, disposition, check_case );
      if (status == STATUS_SUCCESS || status == STATUS_NO_SUCH_FILE)
      {
          TRACE( "%s -> %s\n", debugstr_us(nameW), debugstr_a(unix_name) );
          *unix_name_ret = unix_name;
      }
      else
      {
          TRACE( "%s not found in %s\n", debugstr_w(name), unix_name );
          free( unix_name );
      }
      return status;
  }
  
  
  /******************************************************************************
   *           wine_nt_to_unix_file_name
   *
   * Convert a file name from NT namespace to Unix namespace.
   *
   * If disposition is not FILE_OPEN or FILE_OVERWRITE, the last path
   * element doesn't have to exist; in that case STATUS_NO_SUCH_FILE is
   * returned, but the unix name is still filled in properly.
   */
  NTSTATUS CDECL wine_nt_to_unix_file_name( const UNICODE_STRING *nameW, char *nameA, SIZE_T *size,
                                            UINT disposition )
  {
      char *buffer = NULL;
      NTSTATUS status = nt_to_unix_file_name( nameW, &buffer, disposition );
  
      if (buffer)
      {
          if (*size > strlen(buffer)) strcpy( nameA, buffer );
          else status = STATUS_BUFFER_TOO_SMALL;
          *size = strlen(buffer) + 1;
          free( buffer );
      }
      return status;
  }
  
  
  /******************************************************************
   *           unix_to_nt_file_name
   */
  NTSTATUS unix_to_nt_file_name( const char *name, WCHAR **nt )
  {
      static const WCHAR unix_prefixW[] = {'\\','?','?','\\','u','n','i','x',0};
      WCHAR dos_prefixW[] = {'\\','?','?','\\','A',':','\\',0};
      const WCHAR *prefix = unix_prefixW;
      unsigned int lenW, lenA = strlen(name);
      const char *path = name;
      NTSTATUS status;
      WCHAR *p, *buffer;
      int drive;
  
      status = find_drive_rootA( &path, lenA, &drive );
      lenA -= path - name;
  
      if (status == STATUS_SUCCESS)
      {
          while (lenA && path[0] == '/') { lenA--; path++; }
          dos_prefixW[4] += drive;
          prefix = dos_prefixW;
      }
      else if (status != STATUS_OBJECT_PATH_NOT_FOUND) return status;
  
      lenW = wcslen( prefix );
      if (!(buffer = malloc( (lenA + lenW + 1) * sizeof(WCHAR) ))) return STATUS_NO_MEMORY;
      memcpy( buffer, prefix, lenW * sizeof(WCHAR) );
      lenW += ntdll_umbstowcs( path, lenA, buffer + lenW, lenA );
      buffer[lenW] = 0;
      for (p = buffer; *p; p++) if (*p == '/') *p = '\\';
      *nt = buffer;
      return STATUS_SUCCESS;
  }
  
  
  /******************************************************************
   *           wine_unix_to_nt_file_name
   */
  NTSTATUS CDECL wine_unix_to_nt_file_name( const char *name, WCHAR *buffer, SIZE_T *size )
  {
      WCHAR *nt_name = NULL;
      NTSTATUS status;
  
      if (name[0] != '/') return STATUS_INVALID_PARAMETER;  /* relative paths are not supported */
  
      status = unix_to_nt_file_name( name, &nt_name );
      if (nt_name)
      {
          if (*size > wcslen(nt_name)) wcscpy( buffer, nt_name );
          else status = STATUS_BUFFER_TOO_SMALL;
          *size = wcslen(nt_name) + 1;
          free( nt_name );
      }
      return status;
  }
  
  
  /***********************************************************************
   *           unmount_device
   *
   * Unmount the specified device.
   */
  static NTSTATUS unmount_device( HANDLE handle )
  {
      NTSTATUS status;
      int unix_fd, needs_close;
  
      if (!(status = server_get_unix_fd( handle, 0, &unix_fd, &needs_close, NULL, NULL )))
      {
          struct stat st;
          char *mount_point = NULL;
  
          if (fstat( unix_fd, &st ) == -1 || !is_valid_mounted_device( &st ))
              status = STATUS_INVALID_PARAMETER;
          else
          {
              if ((mount_point = get_device_mount_point( st.st_rdev )))
              {
  #ifdef __APPLE__
                  static const char umount[] = "diskutil unmount >/dev/null 2>&1 ";
  #else
                  static const char umount[] = "umount >/dev/null 2>&1 ";
  #endif
                  char *cmd = malloc( strlen(mount_point)+sizeof(umount));
                  if (cmd)
                  {
                      strcpy( cmd, umount );
                      strcat( cmd, mount_point );
                      system( cmd );
                      free( cmd );
  #ifdef linux
                      /* umount will fail to release the loop device since we still have
                         a handle to it, so we release it here */
                      if (major(st.st_rdev) == LOOP_MAJOR) ioctl( unix_fd, 0x4c01 /*LOOP_CLR_FD*/, 0 );
  #endif
                  }
                  free( mount_point );
              }
          }
          if (needs_close) close( unix_fd );
      }
      return status;
  }
  
  
  /***********************************************************************
   *           set_show_dot_files
   */
  void CDECL set_show_dot_files( BOOL enable )
  {
      show_dot_files = enable;
  }
  
  
  /******************************************************************************
   *              open_unix_file
   *
   * Helper for NtCreateFile that takes a Unix path.
   */
  NTSTATUS open_unix_file( HANDLE *handle, const char *unix_name, ACCESS_MASK access,
                           OBJECT_ATTRIBUTES *attr, ULONG attributes, ULONG sharing, ULONG disposition,
                           ULONG options, void *ea_buffer, ULONG ea_length )
  {
      static UNICODE_STRING empty_string;
      struct object_attributes *objattr;
      OBJECT_ATTRIBUTES unix_attr = *attr;
      NTSTATUS status;
      data_size_t len;
  
      unix_attr.ObjectName = &empty_string;  /* we send the unix name instead */
      if ((status = alloc_object_attributes( &unix_attr, &objattr, &len ))) return status;
  
      SERVER_START_REQ( create_file )
      {
          req->access     = access;
          req->sharing    = sharing;
          req->create     = disposition;
          req->options    = options;
          req->attrs      = attributes;
          wine_server_add_data( req, objattr, len );
          wine_server_add_data( req, unix_name, strlen(unix_name) );
          status = wine_server_call( req );
          *handle = wine_server_ptr_handle( reply->handle );
      }
      SERVER_END_REQ;
      free( objattr );
      return status;
  }
  
  
  /******************************************************************************
   *              NtCreateFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtCreateFile( HANDLE *handle, ACCESS_MASK access, OBJECT_ATTRIBUTES *attr,
                                IO_STATUS_BLOCK *io, LARGE_INTEGER *alloc_size,
                                ULONG attributes, ULONG sharing, ULONG disposition,
                                ULONG options, void *ea_buffer, ULONG ea_length )
  {
      char *unix_name;
      BOOL created = FALSE;
  
      TRACE( "handle=%p access=%08x name=%s objattr=%08x root=%p sec=%p io=%p alloc_size=%p "
             "attr=%08x sharing=%08x disp=%d options=%08x ea=%p.0x%08x\n",
             handle, access, debugstr_us(attr->ObjectName), attr->Attributes,
             attr->RootDirectory, attr->SecurityDescriptor, io, alloc_size,
             attributes, sharing, disposition, options, ea_buffer, ea_length );
  
      if (!attr || !attr->ObjectName) return STATUS_INVALID_PARAMETER;
  
      if (alloc_size) FIXME( "alloc_size not supported\n" );
  
      if (options & FILE_OPEN_BY_FILE_ID)
          io->u.Status = file_id_to_unix_file_name( attr, &unix_name );
      else
          io->u.Status = nt_to_unix_file_name_attr( attr, &unix_name, disposition );
  
      if (io->u.Status == STATUS_BAD_DEVICE_TYPE)
      {
          SERVER_START_REQ( open_file_object )
          {
              req->access     = access;
              req->attributes = attr->Attributes;
              req->rootdir    = wine_server_obj_handle( attr->RootDirectory );
              req->sharing    = sharing;
              req->options    = options;
              wine_server_add_data( req, attr->ObjectName->Buffer, attr->ObjectName->Length );
              io->u.Status = wine_server_call( req );
              *handle = wine_server_ptr_handle( reply->handle );
          }
          SERVER_END_REQ;
          if (io->u.Status == STATUS_SUCCESS) io->Information = FILE_OPENED;
          return io->u.Status;
      }
  
      if (io->u.Status == STATUS_NO_SUCH_FILE && disposition != FILE_OPEN && disposition != FILE_OVERWRITE)
      {
          created = TRUE;
          io->u.Status = STATUS_SUCCESS;
      }
  
      if (io->u.Status == STATUS_SUCCESS)
      {
          io->u.Status = open_unix_file( handle, unix_name, access, attr, attributes,
                                         sharing, disposition, options, ea_buffer, ea_length );
          free( unix_name );
      }
      else WARN( "%s not found (%x)\n", debugstr_us(attr->ObjectName), io->u.Status );
  
      if (io->u.Status == STATUS_SUCCESS)
      {
          if (created) io->Information = FILE_CREATED;
          else switch(disposition)
          {
          case FILE_SUPERSEDE:
              io->Information = FILE_SUPERSEDED;
              break;
          case FILE_CREATE:
              io->Information = FILE_CREATED;
              break;
          case FILE_OPEN:
          case FILE_OPEN_IF:
              io->Information = FILE_OPENED;
              break;
          case FILE_OVERWRITE:
          case FILE_OVERWRITE_IF:
              io->Information = FILE_OVERWRITTEN;
              break;
          }
      }
      else if (io->u.Status == STATUS_TOO_MANY_OPENED_FILES)
      {
          static int once;
          if (!once++) ERR_(winediag)( "Too many open files, ulimit -n probably needs to be increased\n" );
      }
  
      return io->u.Status;
  }
  
  
  /******************************************************************************
   *              NtOpenFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtOpenFile( HANDLE *handle, ACCESS_MASK access, OBJECT_ATTRIBUTES *attr,
                              IO_STATUS_BLOCK *io, ULONG sharing, ULONG options )
  {
      return NtCreateFile( handle, access, attr, io, NULL, 0, sharing, FILE_OPEN, options, NULL, 0 );
  }
  
  
  /******************************************************************************
   *		NtCreateMailslotFile    (NTDLL.@)
   */
  NTSTATUS WINAPI NtCreateMailslotFile( HANDLE *handle, ULONG access, OBJECT_ATTRIBUTES *attr,
                                        IO_STATUS_BLOCK *io, ULONG options, ULONG quota, ULONG msg_size,
                                        LARGE_INTEGER *timeout )
  {
      NTSTATUS status;
      data_size_t len;
      struct object_attributes *objattr;
  
      TRACE( "%p %08x %p %p %08x %08x %08x %p\n",
             handle, access, attr, io, options, quota, msg_size, timeout );
  
      if (!handle) return STATUS_ACCESS_VIOLATION;
      if (!attr) return STATUS_INVALID_PARAMETER;
  
      if ((status = alloc_object_attributes( attr, &objattr, &len ))) return status;
  
      SERVER_START_REQ( create_mailslot )
      {
          req->access       = access;
          req->max_msgsize  = msg_size;
          req->read_timeout = timeout ? timeout->QuadPart : -1;
          wine_server_add_data( req, objattr, len );
          if (!(status = wine_server_call( req ))) *handle = wine_server_ptr_handle( reply->handle );
      }
      SERVER_END_REQ;
  
      free( objattr );
      return status;
  }
  
  
  /******************************************************************
   *		NtCreateNamedPipeFile    (NTDLL.@)
   */
  NTSTATUS WINAPI NtCreateNamedPipeFile( HANDLE *handle, ULONG access, OBJECT_ATTRIBUTES *attr,
                                         IO_STATUS_BLOCK *io, ULONG sharing, ULONG dispo, ULONG options,
                                         ULONG pipe_type, ULONG read_mode, ULONG completion_mode,
                                         ULONG max_inst, ULONG inbound_quota, ULONG outbound_quota,
                                         LARGE_INTEGER *timeout )
  {
      NTSTATUS status;
      data_size_t len;
      struct object_attributes *objattr;
  
      if (!attr) return STATUS_INVALID_PARAMETER;
  
      TRACE( "(%p %x %s %p %x %d %x %d %d %d %d %d %d %p)\n",
             handle, access, debugstr_us(attr->ObjectName), io, sharing, dispo,
             options, pipe_type, read_mode, completion_mode, max_inst, inbound_quota,
             outbound_quota, timeout );
  
      /* assume we only get relative timeout */
      if (timeout->QuadPart > 0) FIXME( "Wrong time %s\n", wine_dbgstr_longlong(timeout->QuadPart) );
  
      if ((status = alloc_object_attributes( attr, &objattr, &len ))) return status;
  
      SERVER_START_REQ( create_named_pipe )
      {
          req->access  = access;
          req->options = options;
          req->sharing = sharing;
          req->flags =
              (pipe_type ? NAMED_PIPE_MESSAGE_STREAM_WRITE   : 0) |
              (read_mode ? NAMED_PIPE_MESSAGE_STREAM_READ    : 0) |
              (completion_mode ? NAMED_PIPE_NONBLOCKING_MODE : 0);
          req->maxinstances = max_inst;
          req->outsize = outbound_quota;
          req->insize  = inbound_quota;
          req->timeout = timeout->QuadPart;
          wine_server_add_data( req, objattr, len );
          if (!(status = wine_server_call( req ))) *handle = wine_server_ptr_handle( reply->handle );
      }
      SERVER_END_REQ;
  
      free( objattr );
      return status;
  }
  
  
  /******************************************************************
   *              NtDeleteFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtDeleteFile( OBJECT_ATTRIBUTES *attr )
  {
      HANDLE handle;
      NTSTATUS status;
      IO_STATUS_BLOCK io;
  
      status = NtCreateFile( &handle, GENERIC_READ | GENERIC_WRITE | DELETE, attr, &io, NULL, 0,
                             FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, FILE_OPEN,
                             FILE_DELETE_ON_CLOSE, NULL, 0 );
      if (status == STATUS_SUCCESS) NtClose( handle );
      return status;
  }
  
  
  /******************************************************************************
   *              NtQueryFullAttributesFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtQueryFullAttributesFile( const OBJECT_ATTRIBUTES *attr,
                                             FILE_NETWORK_OPEN_INFORMATION *info )
  {
      char *unix_name;
      NTSTATUS status;
  
      if (!(status = nt_to_unix_file_name_attr( attr, &unix_name, FILE_OPEN )))
      {
          ULONG attributes;
          struct stat st;
  
          if (get_file_info( unix_name, &st, &attributes ) == -1)
              status = errno_to_status( errno );
          else if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode))
              status = STATUS_INVALID_INFO_CLASS;
          else
          {
              FILE_BASIC_INFORMATION basic;
              FILE_STANDARD_INFORMATION std;
  
              fill_file_info( &st, attributes, &basic, FileBasicInformation );
              fill_file_info( &st, attributes, &std, FileStandardInformation );
  
              info->CreationTime   = basic.CreationTime;
              info->LastAccessTime = basic.LastAccessTime;
              info->LastWriteTime  = basic.LastWriteTime;
              info->ChangeTime     = basic.ChangeTime;
              info->AllocationSize = std.AllocationSize;
              info->EndOfFile      = std.EndOfFile;
              info->FileAttributes = basic.FileAttributes;
              if (is_hidden_file( attr->ObjectName )) info->FileAttributes |= FILE_ATTRIBUTE_HIDDEN;
          }
          free( unix_name );
      }
      else WARN( "%s not found (%x)\n", debugstr_us(attr->ObjectName), status );
      return status;
  }
  
  
  /******************************************************************************
   *              NtQueryAttributesFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtQueryAttributesFile( const OBJECT_ATTRIBUTES *attr, FILE_BASIC_INFORMATION *info )
  {
      char *unix_name;
      NTSTATUS status;
  
      if (!(status = nt_to_unix_file_name_attr( attr, &unix_name, FILE_OPEN )))
      {
          ULONG attributes;
          struct stat st;
  
          if (get_file_info( unix_name, &st, &attributes ) == -1)
              status = errno_to_status( errno );
          else if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode))
              status = STATUS_INVALID_INFO_CLASS;
          else
          {
              status = fill_file_info( &st, attributes, info, FileBasicInformation );
              if (is_hidden_file( attr->ObjectName )) info->FileAttributes |= FILE_ATTRIBUTE_HIDDEN;
          }
          free( unix_name );
      }
      else WARN( "%s not found (%x)\n", debugstr_us(attr->ObjectName), status );
      return status;
  }
  
  
  /******************************************************************************
   *              NtQueryInformationFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtQueryInformationFile( HANDLE handle, IO_STATUS_BLOCK *io,
                                          void *ptr, LONG len, FILE_INFORMATION_CLASS class )
  {
      static const size_t info_sizes[] =
      {
          0,
          sizeof(FILE_DIRECTORY_INFORMATION),            /* FileDirectoryInformation */
          sizeof(FILE_FULL_DIRECTORY_INFORMATION),       /* FileFullDirectoryInformation */
          sizeof(FILE_BOTH_DIRECTORY_INFORMATION),       /* FileBothDirectoryInformation */
          sizeof(FILE_BASIC_INFORMATION),                /* FileBasicInformation */
          sizeof(FILE_STANDARD_INFORMATION),             /* FileStandardInformation */
          sizeof(FILE_INTERNAL_INFORMATION),             /* FileInternalInformation */
          sizeof(FILE_EA_INFORMATION),                   /* FileEaInformation */
          0,                                             /* FileAccessInformation */
          sizeof(FILE_NAME_INFORMATION),                 /* FileNameInformation */
          sizeof(FILE_RENAME_INFORMATION)-sizeof(WCHAR), /* FileRenameInformation */
          0,                                             /* FileLinkInformation */
          sizeof(FILE_NAMES_INFORMATION)-sizeof(WCHAR),  /* FileNamesInformation */
          sizeof(FILE_DISPOSITION_INFORMATION),          /* FileDispositionInformation */
          sizeof(FILE_POSITION_INFORMATION),             /* FilePositionInformation */
          sizeof(FILE_FULL_EA_INFORMATION),              /* FileFullEaInformation */
          0,                                             /* FileModeInformation */
          sizeof(FILE_ALIGNMENT_INFORMATION),            /* FileAlignmentInformation */
          sizeof(FILE_ALL_INFORMATION),                  /* FileAllInformation */
          sizeof(FILE_ALLOCATION_INFORMATION),           /* FileAllocationInformation */
          sizeof(FILE_END_OF_FILE_INFORMATION),          /* FileEndOfFileInformation */
          0,                                             /* FileAlternateNameInformation */
          sizeof(FILE_STREAM_INFORMATION)-sizeof(WCHAR), /* FileStreamInformation */
          sizeof(FILE_PIPE_INFORMATION),                 /* FilePipeInformation */
          sizeof(FILE_PIPE_LOCAL_INFORMATION),           /* FilePipeLocalInformation */
          0,                                             /* FilePipeRemoteInformation */
          sizeof(FILE_MAILSLOT_QUERY_INFORMATION),       /* FileMailslotQueryInformation */
          0,                                             /* FileMailslotSetInformation */
          0,                                             /* FileCompressionInformation */
          0,                                             /* FileObjectIdInformation */
          0,                                             /* FileCompletionInformation */
          0,                                             /* FileMoveClusterInformation */
          0,                                             /* FileQuotaInformation */
          0,                                             /* FileReparsePointInformation */
          sizeof(FILE_NETWORK_OPEN_INFORMATION),         /* FileNetworkOpenInformation */
          sizeof(FILE_ATTRIBUTE_TAG_INFORMATION),        /* FileAttributeTagInformation */
          0,                                             /* FileTrackingInformation */
          0,                                             /* FileIdBothDirectoryInformation */
          0,                                             /* FileIdFullDirectoryInformation */
          0,                                             /* FileValidDataLengthInformation */
          0,                                             /* FileShortNameInformation */
          0,                                             /* FileIoCompletionNotificationInformation, */
          0,                                             /* FileIoStatusBlockRangeInformation */
          0,                                             /* FileIoPriorityHintInformation */
          0,                                             /* FileSfioReserveInformation */
          0,                                             /* FileSfioVolumeInformation */
          0,                                             /* FileHardLinkInformation */
          0,                                             /* FileProcessIdsUsingFileInformation */
          0,                                             /* FileNormalizedNameInformation */
          0,                                             /* FileNetworkPhysicalNameInformation */
          0,                                             /* FileIdGlobalTxDirectoryInformation */
          0,                                             /* FileIsRemoteDeviceInformation */
          0,                                             /* FileAttributeCacheInformation */
          0,                                             /* FileNumaNodeInformation */
          0,                                             /* FileStandardLinkInformation */
          0,                                             /* FileRemoteProtocolInformation */
          0,                                             /* FileRenameInformationBypassAccessCheck */
          0,                                             /* FileLinkInformationBypassAccessCheck */
          0,                                             /* FileVolumeNameInformation */
          sizeof(FILE_ID_INFORMATION),                   /* FileIdInformation */
          0,                                             /* FileIdExtdDirectoryInformation */
          0,                                             /* FileReplaceCompletionInformation */
          0,                                             /* FileHardLinkFullIdInformation */
          0,                                             /* FileIdExtdBothDirectoryInformation */
      };
  
      struct stat st;
      int fd, needs_close = FALSE;
      ULONG attr;
      unsigned int options;
  
      TRACE( "(%p,%p,%p,0x%08x,0x%08x)\n", handle, io, ptr, len, class);
  
      io->Information = 0;
  
      if (class <= 0 || class >= FileMaximumInformation)
          return io->u.Status = STATUS_INVALID_INFO_CLASS;
      if (!info_sizes[class])
          return server_get_file_info( handle, io, ptr, len, class );
      if (len < info_sizes[class])
          return io->u.Status = STATUS_INFO_LENGTH_MISMATCH;
  
      if ((io->u.Status = server_get_unix_fd( handle, 0, &fd, &needs_close, NULL, &options )))
      {
          if (io->u.Status != STATUS_BAD_DEVICE_TYPE) return io->u.Status;
          return server_get_file_info( handle, io, ptr, len, class );
      }
  
      switch (class)
      {
      case FileBasicInformation:
          if (fd_get_file_info( fd, options, &st, &attr ) == -1)
              io->u.Status = errno_to_status( errno );
          else if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode))
              io->u.Status = STATUS_INVALID_INFO_CLASS;
          else
              fill_file_info( &st, attr, ptr, class );
          break;
      case FileStandardInformation:
          {
              FILE_STANDARD_INFORMATION *info = ptr;
  
              if (fd_get_file_info( fd, options, &st, &attr ) == -1) io->u.Status = errno_to_status( errno );
              else
              {
                  fill_file_info( &st, attr, info, class );
                  info->DeletePending = FALSE; /* FIXME */
              }
          }
          break;
      case FilePositionInformation:
          {
              FILE_POSITION_INFORMATION *info = ptr;
              off_t res = lseek( fd, 0, SEEK_CUR );
              if (res == (off_t)-1) io->u.Status = errno_to_status( errno );
              else info->CurrentByteOffset.QuadPart = res;
          }
          break;
      case FileInternalInformation:
          if (fd_get_file_info( fd, options, &st, &attr ) == -1) io->u.Status = errno_to_status( errno );
          else fill_file_info( &st, attr, ptr, class );
          break;
      case FileEaInformation:
          {
              FILE_EA_INFORMATION *info = ptr;
              info->EaSize = 0;
          }
          break;
      case FileEndOfFileInformation:
          if (fd_get_file_info( fd, options, &st, &attr ) == -1) io->u.Status = errno_to_status( errno );
          else fill_file_info( &st, attr, ptr, class );
          break;
      case FileAllInformation:
          {
              FILE_ALL_INFORMATION *info = ptr;
              char *unix_name;
  
              if (fd_get_file_info( fd, options, &st, &attr ) == -1) io->u.Status = errno_to_status( errno );
              else if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode))
                  io->u.Status = STATUS_INVALID_INFO_CLASS;
              else if (!(io->u.Status = server_get_unix_name( handle, &unix_name )))
              {
                  LONG name_len = len - FIELD_OFFSET(FILE_ALL_INFORMATION, NameInformation.FileName);
  
                  fill_file_info( &st, attr, info, FileAllInformation );
                  info->StandardInformation.DeletePending = FALSE; /* FIXME */
                  info->EaInformation.EaSize = 0;
                  info->AccessInformation.AccessFlags = 0;  /* FIXME */
                  info->PositionInformation.CurrentByteOffset.QuadPart = lseek( fd, 0, SEEK_CUR );
                  info->ModeInformation.Mode = 0;  /* FIXME */
                  info->AlignmentInformation.AlignmentRequirement = 1;  /* FIXME */
  
                  io->u.Status = fill_name_info( unix_name, &info->NameInformation, &name_len );
                  free( unix_name );
                  io->Information = FIELD_OFFSET(FILE_ALL_INFORMATION, NameInformation.FileName) + name_len;
              }
          }
          break;
      case FileMailslotQueryInformation:
          {
              FILE_MAILSLOT_QUERY_INFORMATION *info = ptr;
  
              SERVER_START_REQ( set_mailslot_info )
              {
                  req->handle = wine_server_obj_handle( handle );
                  req->flags = 0;
                  io->u.Status = wine_server_call( req );
                  if( io->u.Status == STATUS_SUCCESS )
                  {
                      info->MaximumMessageSize = reply->max_msgsize;
                      info->MailslotQuota = 0;
                      info->NextMessageSize = 0;
                      info->MessagesAvailable = 0;
                      info->ReadTimeout.QuadPart = reply->read_timeout;
                  }
              }
              SERVER_END_REQ;
              if (!io->u.Status)
              {
                  char *tmpbuf;
                  ULONG size = info->MaximumMessageSize ? info->MaximumMessageSize : 0x10000;
                  if (size > 0x10000) size = 0x10000;
                  if ((tmpbuf = malloc( size )))
                  {
                      if (!server_get_unix_fd( handle, FILE_READ_DATA, &fd, &needs_close, NULL, NULL ))
                      {
                          int res = recv( fd, tmpbuf, size, MSG_PEEK );
                          info->MessagesAvailable = (res > 0);
                          info->NextMessageSize = (res >= 0) ? res : MAILSLOT_NO_MESSAGE;
                          if (needs_close) close( fd );
                      }
                      free( tmpbuf );
                  }
              }
          }
          break;
      case FileNameInformation:
          {
              FILE_NAME_INFORMATION *info = ptr;
              char *unix_name;
  
              if (!(io->u.Status = server_get_unix_name( handle, &unix_name )))
              {
                  LONG name_len = len - FIELD_OFFSET(FILE_NAME_INFORMATION, FileName);
                  io->u.Status = fill_name_info( unix_name, info, &name_len );
                  free( unix_name );
                  io->Information = FIELD_OFFSET(FILE_NAME_INFORMATION, FileName) + name_len;
              }
          }
          break;
      case FileNetworkOpenInformation:
          {
              FILE_NETWORK_OPEN_INFORMATION *info = ptr;
              char *unix_name;
  
              if (!(io->u.Status = server_get_unix_name( handle, &unix_name )))
              {
                  ULONG attributes;
                  struct stat st;
  
                  if (get_file_info( unix_name, &st, &attributes ) == -1)
                      io->u.Status = errno_to_status( errno );
                  else if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode))
                      io->u.Status = STATUS_INVALID_INFO_CLASS;
                  else
                  {
                      FILE_BASIC_INFORMATION basic;
                      FILE_STANDARD_INFORMATION std;
  
                      fill_file_info( &st, attributes, &basic, FileBasicInformation );
                      fill_file_info( &st, attributes, &std, FileStandardInformation );
  
                      info->CreationTime   = basic.CreationTime;
                      info->LastAccessTime = basic.LastAccessTime;
                      info->LastWriteTime  = basic.LastWriteTime;
                      info->ChangeTime     = basic.ChangeTime;
                      info->AllocationSize = std.AllocationSize;
                      info->EndOfFile      = std.EndOfFile;
                      info->FileAttributes = basic.FileAttributes;
                  }
                  free( unix_name );
              }
          }
          break;
      case FileIdInformation:
          if (fd_get_file_info( fd, options, &st, &attr ) == -1) io->u.Status = errno_to_status( errno );
          else
          {
              struct mountmgr_unix_drive drive;
              FILE_ID_INFORMATION *info = ptr;
  
              info->VolumeSerialNumber = 0;
              if (!(io->u.Status = get_mountmgr_fs_info( handle, fd, &drive, sizeof(drive) )))
                  info->VolumeSerialNumber = drive.serial;
              memset( &info->FileId, 0, sizeof(info->FileId) );
              *(ULONGLONG *)&info->FileId = st.st_ino;
          }
          break;
      case FileAttributeTagInformation:
          if (fd_get_file_info( fd, options, &st, &attr ) == -1) io->u.Status = errno_to_status( errno );
          else
          {
              FILE_ATTRIBUTE_TAG_INFORMATION *info = ptr;
              info->FileAttributes = attr;
              info->ReparseTag = 0; /* FIXME */
              if ((options & FILE_OPEN_REPARSE_POINT) && fd_is_mount_point( fd, &st ))
                  info->ReparseTag = IO_REPARSE_TAG_MOUNT_POINT;
          }
          break;
      default:
          FIXME("Unsupported class (%d)\n", class);
          io->u.Status = STATUS_NOT_IMPLEMENTED;
          break;
      }
      if (needs_close) close( fd );
      if (io->u.Status == STATUS_SUCCESS && !io->Information) io->Information = info_sizes[class];
      return io->u.Status;
  }
  
  
  /* return TRUE if this is a file owned by Wine which applications should not
   * try to mess with */
  static BOOL is_wine_file(HANDLE handle)
  {
      char *unix_name;
      BOOL ret;
  
      if (server_get_unix_name(handle, &unix_name))
          return FALSE;
  
      ret = strstr(unix_name, "/lib/wine/") != NULL ||
          strstr(unix_name, "/lib64/wine/") != NULL ||
          strstr(unix_name, "/share/wine/") != NULL;
  
      free(unix_name);
  
      return ret;
  }
  
  
  /******************************************************************************
   *              NtSetInformationFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtSetInformationFile( HANDLE handle, IO_STATUS_BLOCK *io,
                                        void *ptr, ULONG len, FILE_INFORMATION_CLASS class )
  {
      int fd, needs_close;
  
      TRACE( "(%p,%p,%p,0x%08x,0x%08x)\n", handle, io, ptr, len, class );
  
      io->u.Status = STATUS_SUCCESS;
      switch (class)
      {
      case FileBasicInformation:
          if (len >= sizeof(FILE_BASIC_INFORMATION))
          {
              struct stat st;
              const FILE_BASIC_INFORMATION *info = ptr;
              LARGE_INTEGER mtime, atime;
  
              if ((io->u.Status = server_get_unix_fd( handle, 0, &fd, &needs_close, NULL, NULL )))
                  return io->u.Status;
  
              mtime.QuadPart = info->LastWriteTime.QuadPart == -1 ? 0 : info->LastWriteTime.QuadPart;
              atime.QuadPart = info->LastAccessTime.QuadPart == -1 ? 0 : info->LastAccessTime.QuadPart;
  
              if (atime.QuadPart || mtime.QuadPart)
                  io->u.Status = set_file_times( fd, &mtime, &atime );
  
              if (io->u.Status == STATUS_SUCCESS && info->FileAttributes)
              {
                  if (fstat( fd, &st ) == -1) io->u.Status = errno_to_status( errno );
                  else
                  {
                      if (info->FileAttributes & FILE_ATTRIBUTE_READONLY)
                      {
                          if (S_ISDIR( st.st_mode))
                              WARN("FILE_ATTRIBUTE_READONLY ignored for directory.\n");
                          else
                              st.st_mode &= ~0222; /* clear write permission bits */
                      }
                      else
                      {
                          if (is_wine_file(handle))
                          {
                              TRACE("HACK: Not giving write permission to wine file!\n");
                              io->u.Status = STATUS_ACCESS_DENIED;
                          }
                          else
                          {
                              /* add write permission only where we already have read permission */
                              st.st_mode |= (0600 | ((st.st_mode & 044) >> 1)) & (~start_umask);
                          }
                      }
                      if (fchmod( fd, st.st_mode ) == -1) io->u.Status = errno_to_status( errno );
                  }
              }
  
              if (needs_close) close( fd );
          }
          else io->u.Status = STATUS_INVALID_PARAMETER_3;
          break;
  
      case FilePositionInformation:
          if (len >= sizeof(FILE_POSITION_INFORMATION))
          {
              const FILE_POSITION_INFORMATION *info = ptr;
  
              if ((io->u.Status = server_get_unix_fd( handle, 0, &fd, &needs_close, NULL, NULL )))
                  return io->u.Status;
  
              if (lseek( fd, info->CurrentByteOffset.QuadPart, SEEK_SET ) == (off_t)-1)
                  io->u.Status = errno_to_status( errno );
  
              if (needs_close) close( fd );
          }
          else io->u.Status = STATUS_INVALID_PARAMETER_3;
          break;
  
      case FileEndOfFileInformation:
          if (len >= sizeof(FILE_END_OF_FILE_INFORMATION))
          {
              struct stat st;
              const FILE_END_OF_FILE_INFORMATION *info = ptr;
  
              if ((io->u.Status = server_get_unix_fd( handle, 0, &fd, &needs_close, NULL, NULL )))
                  return io->u.Status;
  
              /* first try normal truncate */
              if (ftruncate( fd, (off_t)info->EndOfFile.QuadPart ) != -1) break;
  
              /* now check for the need to extend the file */
              if (fstat( fd, &st ) != -1 && (off_t)info->EndOfFile.QuadPart > st.st_size)
              {
                  static const char zero;
  
                  /* extend the file one byte beyond the requested size and then truncate it */
                  /* this should work around ftruncate implementations that can't extend files */
                  if (pwrite( fd, &zero, 1, (off_t)info->EndOfFile.QuadPart ) != -1 &&
                      ftruncate( fd, (off_t)info->EndOfFile.QuadPart ) != -1) break;
              }
              io->u.Status = errno_to_status( errno );
  
              if (needs_close) close( fd );
          }
          else io->u.Status = STATUS_INVALID_PARAMETER_3;
          break;
  
      case FilePipeInformation:
          if (len >= sizeof(FILE_PIPE_INFORMATION))
          {
              FILE_PIPE_INFORMATION *info = ptr;
  
              if ((info->CompletionMode | info->ReadMode) & ~1)
              {
                  io->u.Status = STATUS_INVALID_PARAMETER;
                  break;
              }
  
              SERVER_START_REQ( set_named_pipe_info )
              {
                  req->handle = wine_server_obj_handle( handle );
                  req->flags  = (info->CompletionMode ? NAMED_PIPE_NONBLOCKING_MODE    : 0) |
                                (info->ReadMode       ? NAMED_PIPE_MESSAGE_STREAM_READ : 0);
                  io->u.Status = wine_server_call( req );
              }
              SERVER_END_REQ;
          }
          else io->u.Status = STATUS_INVALID_PARAMETER_3;
          break;
  
      case FileMailslotSetInformation:
          {
              FILE_MAILSLOT_SET_INFORMATION *info = ptr;
  
              SERVER_START_REQ( set_mailslot_info )
              {
                  req->handle = wine_server_obj_handle( handle );
                  req->flags = MAILSLOT_SET_READ_TIMEOUT;
                  req->read_timeout = info->ReadTimeout.QuadPart;
                  io->u.Status = wine_server_call( req );
              }
              SERVER_END_REQ;
          }
          break;
  
      case FileCompletionInformation:
          if (len >= sizeof(FILE_COMPLETION_INFORMATION))
          {
              FILE_COMPLETION_INFORMATION *info = ptr;
  
              SERVER_START_REQ( set_completion_info )
              {
                  req->handle   = wine_server_obj_handle( handle );
                  req->chandle  = wine_server_obj_handle( info->CompletionPort );
                  req->ckey     = info->CompletionKey;
                  io->u.Status  = wine_server_call( req );
              }
              SERVER_END_REQ;
          } else
              io->u.Status = STATUS_INVALID_PARAMETER_3;
          break;
  
      case FileIoCompletionNotificationInformation:
          if (len >= sizeof(FILE_IO_COMPLETION_NOTIFICATION_INFORMATION))
          {
              FILE_IO_COMPLETION_NOTIFICATION_INFORMATION *info = ptr;
  
              if (info->Flags & FILE_SKIP_SET_USER_EVENT_ON_FAST_IO)
                  FIXME( "FILE_SKIP_SET_USER_EVENT_ON_FAST_IO not supported\n" );
  
              SERVER_START_REQ( set_fd_completion_mode )
              {
                  req->handle   = wine_server_obj_handle( handle );
                  req->flags    = info->Flags;
                  io->u.Status  = wine_server_call( req );
              }
              SERVER_END_REQ;
          } else
              io->u.Status = STATUS_INFO_LENGTH_MISMATCH;
          break;
  
      case FileIoPriorityHintInformation:
          if (len >= sizeof(FILE_IO_PRIORITY_HINT_INFO))
          {
              FILE_IO_PRIORITY_HINT_INFO *info = ptr;
              if (info->PriorityHint < MaximumIoPriorityHintType)
                  TRACE( "ignoring FileIoPriorityHintInformation %u\n", info->PriorityHint );
              else
                  io->u.Status = STATUS_INVALID_PARAMETER;
          }
          else io->u.Status = STATUS_INFO_LENGTH_MISMATCH;
          break;
  
      case FileAllInformation:
          io->u.Status = STATUS_INVALID_INFO_CLASS;
          break;
  
      case FileValidDataLengthInformation:
          if (len >= sizeof(FILE_VALID_DATA_LENGTH_INFORMATION))
          {
              struct stat st;
              const FILE_VALID_DATA_LENGTH_INFORMATION *info = ptr;
  
              if ((io->u.Status = server_get_unix_fd( handle, FILE_WRITE_DATA, &fd, &needs_close, NULL, NULL )))
                  return io->u.Status;
  
              if (fstat( fd, &st ) == -1) io->u.Status = errno_to_status( errno );
              else if (info->ValidDataLength.QuadPart <= 0 || (off_t)info->ValidDataLength.QuadPart > st.st_size)
                  io->u.Status = STATUS_INVALID_PARAMETER;
              else
              {
  #ifdef HAVE_FALLOCATE
                  if (fallocate( fd, 0, 0, (off_t)info->ValidDataLength.QuadPart ) == -1)
                  {
                      NTSTATUS status = errno_to_status( errno );
                      if (status == STATUS_NOT_SUPPORTED) WARN( "fallocate not supported on this filesystem\n" );
                      else io->u.Status = status;
                  }
  #else
                  FIXME( "setting valid data length not supported\n" );
  #endif
              }
              if (needs_close) close( fd );
          }
          else io->u.Status = STATUS_INVALID_PARAMETER_3;
          break;
  
      case FileDispositionInformation:
          if (len >= sizeof(FILE_DISPOSITION_INFORMATION))
          {
              FILE_DISPOSITION_INFORMATION *info = ptr;
  
              SERVER_START_REQ( set_fd_disp_info )
              {
                  req->handle   = wine_server_obj_handle( handle );
                  req->unlink   = info->DoDeleteFile;
                  io->u.Status  = wine_server_call( req );
              }
              SERVER_END_REQ;
          } else
              io->u.Status = STATUS_INVALID_PARAMETER_3;
          break;
  
      case FileRenameInformation:
          if (len >= sizeof(FILE_RENAME_INFORMATION))
          {
              FILE_RENAME_INFORMATION *info = ptr;
              UNICODE_STRING name_str;
              OBJECT_ATTRIBUTES attr;
              char *unix_name;
  
              name_str.Buffer = info->FileName;
              name_str.Length = info->FileNameLength;
              name_str.MaximumLength = info->FileNameLength + sizeof(WCHAR);
  
              attr.Length = sizeof(attr);
              attr.ObjectName = &name_str;
              attr.RootDirectory = info->RootDirectory;
              attr.Attributes = OBJ_CASE_INSENSITIVE;
  
              io->u.Status = nt_to_unix_file_name_attr( &attr, &unix_name, FILE_OPEN_IF );
              if (io->u.Status != STATUS_SUCCESS && io->u.Status != STATUS_NO_SUCH_FILE)
                  break;
  
              SERVER_START_REQ( set_fd_name_info )
              {
                  req->handle   = wine_server_obj_handle( handle );
                  req->rootdir  = wine_server_obj_handle( attr.RootDirectory );
                  req->link     = FALSE;
                  req->replace  = info->ReplaceIfExists;
                  wine_server_add_data( req, unix_name, strlen(unix_name) );
                  io->u.Status = wine_server_call( req );
              }
              SERVER_END_REQ;
  
              free( unix_name );
          }
          else io->u.Status = STATUS_INVALID_PARAMETER_3;
          break;
  
      case FileLinkInformation:
          if (len >= sizeof(FILE_LINK_INFORMATION))
          {
              FILE_LINK_INFORMATION *info = ptr;
              UNICODE_STRING name_str;
              OBJECT_ATTRIBUTES attr;
              char *unix_name;
  
              name_str.Buffer = info->FileName;
              name_str.Length = info->FileNameLength;
              name_str.MaximumLength = info->FileNameLength + sizeof(WCHAR);
  
              attr.Length = sizeof(attr);
              attr.ObjectName = &name_str;
              attr.RootDirectory = info->RootDirectory;
              attr.Attributes = OBJ_CASE_INSENSITIVE;
  
              io->u.Status = nt_to_unix_file_name_attr( &attr, &unix_name, FILE_OPEN_IF );
              if (io->u.Status != STATUS_SUCCESS && io->u.Status != STATUS_NO_SUCH_FILE)
                  break;
  
              SERVER_START_REQ( set_fd_name_info )
              {
                  req->handle   = wine_server_obj_handle( handle );
                  req->rootdir  = wine_server_obj_handle( attr.RootDirectory );
                  req->link     = TRUE;
                  req->replace  = info->ReplaceIfExists;
                  wine_server_add_data( req, unix_name, strlen(unix_name) );
                  io->u.Status  = wine_server_call( req );
              }
              SERVER_END_REQ;
  
              free( unix_name );
          }
          else io->u.Status = STATUS_INVALID_PARAMETER_3;
          break;
  
      default:
          FIXME("Unsupported class (%d)\n", class);
          io->u.Status = STATUS_NOT_IMPLEMENTED;
          break;
      }
      io->Information = 0;
      return io->u.Status;
  }
  
  
  /***********************************************************************
   *                  Asynchronous file I/O                              *
   */
  
  typedef NTSTATUS async_callback_t( void *user, IO_STATUS_BLOCK *io, NTSTATUS status );
  
  struct async_fileio
  {
      async_callback_t    *callback; /* must be the first field */
      struct async_fileio *next;
      HANDLE               handle;
  };
  
  struct async_fileio_read
  {
      struct async_fileio io;
      char               *buffer;
      unsigned int        already;
      unsigned int        count;
      BOOL                avail_mode;
  };
  
  struct async_fileio_write
  {
      struct async_fileio io;
      const char         *buffer;
      unsigned int        already;
      unsigned int        count;
  };
  
  struct async_fileio_read_changes
  {
      struct async_fileio io;
      void               *buffer;
      ULONG               buffer_size;
      ULONG               data_size;
      char                data[1];
  };
  
  struct async_irp
  {
      struct async_fileio io;
      void               *buffer;   /* buffer for output */
      ULONG               size;     /* size of buffer */
  };
  
  static struct async_fileio *fileio_freelist;
  
  static void release_fileio( struct async_fileio *io )
  {
      for (;;)
      {
          struct async_fileio *next = fileio_freelist;
          io->next = next;
          if (InterlockedCompareExchangePointer( (void **)&fileio_freelist, io, next ) == next) return;
      }
  }
  
  static struct async_fileio *alloc_fileio( DWORD size, async_callback_t callback, HANDLE handle )
  {
      /* first free remaining previous fileinfos */
      struct async_fileio *io = InterlockedExchangePointer( (void **)&fileio_freelist, NULL );
  
      while (io)
      {
          struct async_fileio *next = io->next;
          free( io );
          io = next;
      }
  
      if ((io = malloc( size )))
      {
          io->callback = callback;
          io->handle   = handle;
      }
      return io;
  }
  
  static async_data_t server_async( HANDLE handle, struct async_fileio *user, HANDLE event,
                                    PIO_APC_ROUTINE apc, void *apc_context, IO_STATUS_BLOCK *io )
  {
      async_data_t async;
      async.handle      = wine_server_obj_handle( handle );
      async.user        = wine_server_client_ptr( user );
      async.iosb        = wine_server_client_ptr( io );
      async.event       = wine_server_obj_handle( event );
      async.apc         = wine_server_client_ptr( apc );
      async.apc_context = wine_server_client_ptr( apc_context );
      return async;
  }
  
  static NTSTATUS wait_async( HANDLE handle, BOOL alertable, IO_STATUS_BLOCK *io )
  {
      if (NtWaitForSingleObject( handle, alertable, NULL )) return STATUS_PENDING;
      return io->u.Status;
  }
  
  /* callback for irp async I/O completion */
  static NTSTATUS irp_completion( void *user, IO_STATUS_BLOCK *io, NTSTATUS status )
  {
      struct async_irp *async = user;
      ULONG information = 0;
  
      if (status == STATUS_ALERTED)
      {
          SERVER_START_REQ( get_async_result )
          {
              req->user_arg = wine_server_client_ptr( async );
              wine_server_set_reply( req, async->buffer, async->size );
              status = virtual_locked_server_call( req );
              information = reply->size;
          }
          SERVER_END_REQ;
      }
      if (status != STATUS_PENDING)
      {
          io->u.Status = status;
          io->Information = information;
          release_fileio( &async->io );
      }
      return status;
  }
  
  static NTSTATUS async_read_proc( void *user, IO_STATUS_BLOCK *iosb, NTSTATUS status )
  {
      struct async_fileio_read *fileio = user;
      int fd, needs_close, result;
  
      switch (status)
      {
      case STATUS_ALERTED: /* got some new data */
          /* check to see if the data is ready (non-blocking) */
          if ((status = server_get_unix_fd( fileio->io.handle, FILE_READ_DATA, &fd,
                                            &needs_close, NULL, NULL )))
              break;
  
          result = virtual_locked_read(fd, &fileio->buffer[fileio->already], fileio->count-fileio->already);
          if (needs_close) close( fd );
  
          if (result < 0)
          {
              if (errno == EAGAIN || errno == EINTR)
                  status = STATUS_PENDING;
              else /* check to see if the transfer is complete */
                  status = errno_to_status( errno );
          }
          else if (result == 0)
          {
              status = fileio->already ? STATUS_SUCCESS : STATUS_PIPE_BROKEN;
          }
          else
          {
              fileio->already += result;
              if (fileio->already >= fileio->count || fileio->avail_mode)
                  status = STATUS_SUCCESS;
              else
                  status = STATUS_PENDING;
          }
          break;
  
      case STATUS_TIMEOUT:
      case STATUS_IO_TIMEOUT:
          if (fileio->already) status = STATUS_SUCCESS;
          break;
      }
      if (status != STATUS_PENDING)
      {
          iosb->u.Status = status;
          iosb->Information = fileio->already;
          release_fileio( &fileio->io );
      }
      return status;
  }
  
  static NTSTATUS async_write_proc( void *user, IO_STATUS_BLOCK *iosb, NTSTATUS status )
  {
      struct async_fileio_write *fileio = user;
      int result, fd, needs_close;
      enum server_fd_type type;
  
      switch (status)
      {
      case STATUS_ALERTED:
          /* write some data (non-blocking) */
          if ((status = server_get_unix_fd( fileio->io.handle, FILE_WRITE_DATA, &fd,
                                            &needs_close, &type, NULL )))
              break;
  
          if (!fileio->count && (type == FD_TYPE_MAILSLOT || type == FD_TYPE_SOCKET))
              result = send( fd, fileio->buffer, 0, 0 );
          else
              result = write( fd, &fileio->buffer[fileio->already], fileio->count - fileio->already );
  
          if (needs_close) close( fd );
  
          if (result < 0)
          {
              if (errno == EAGAIN || errno == EINTR) status = STATUS_PENDING;
              else status = errno_to_status( errno );
          }
          else
          {
              fileio->already += result;
              status = (fileio->already < fileio->count) ? STATUS_PENDING : STATUS_SUCCESS;
          }
          break;
  
      case STATUS_TIMEOUT:
      case STATUS_IO_TIMEOUT:
          if (fileio->already) status = STATUS_SUCCESS;
          break;
      }
      if (status != STATUS_PENDING)
      {
          iosb->u.Status = status;
          iosb->Information = fileio->already;
          release_fileio( &fileio->io );
      }
      return status;
  }
  
  /* do a read call through the server */
  static NTSTATUS server_read_file( HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc, void *apc_context,
                                    IO_STATUS_BLOCK *io, void *buffer, ULONG size,
                                    LARGE_INTEGER *offset, ULONG *key )
  {
      struct async_irp *async;
      NTSTATUS status;
      HANDLE wait_handle;
      ULONG options;
  
      if (!(async = (struct async_irp *)alloc_fileio( sizeof(*async), irp_completion, handle )))
          return STATUS_NO_MEMORY;
  
      async->buffer  = buffer;
      async->size    = size;
  
      SERVER_START_REQ( read )
      {
          req->async = server_async( handle, &async->io, event, apc, apc_context, io );
          req->pos   = offset ? offset->QuadPart : 0;
          wine_server_set_reply( req, buffer, size );
          status = virtual_locked_server_call( req );
          wait_handle = wine_server_ptr_handle( reply->wait );
          options     = reply->options;
          if (wait_handle && status != STATUS_PENDING)
          {
              io->u.Status    = status;
              io->Information = wine_server_reply_size( reply );
          }
      }
      SERVER_END_REQ;
  
      if (status != STATUS_PENDING) free( async );
  
      if (wait_handle) status = wait_async( wait_handle, (options & FILE_SYNCHRONOUS_IO_ALERT), io );
      return status;
  }
  
  /* do a write call through the server */
  static NTSTATUS server_write_file( HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc, void *apc_context,
                                     IO_STATUS_BLOCK *io, const void *buffer, ULONG size,
                                     LARGE_INTEGER *offset, ULONG *key )
  {
      struct async_irp *async;
      NTSTATUS status;
      HANDLE wait_handle;
      ULONG options;
  
      if (!(async = (struct async_irp *)alloc_fileio( sizeof(*async), irp_completion, handle )))
          return STATUS_NO_MEMORY;
  
      async->buffer  = NULL;
      async->size    = 0;
  
      SERVER_START_REQ( write )
      {
          req->async = server_async( handle, &async->io, event, apc, apc_context, io );
          req->pos   = offset ? offset->QuadPart : 0;
          wine_server_add_data( req, buffer, size );
          status = wine_server_call( req );
          wait_handle = wine_server_ptr_handle( reply->wait );
          options     = reply->options;
          if (wait_handle && status != STATUS_PENDING)
          {
              io->u.Status    = status;
              io->Information = reply->size;
          }
      }
      SERVER_END_REQ;
  
      if (status != STATUS_PENDING) free( async );
  
      if (wait_handle) status = wait_async( wait_handle, (options & FILE_SYNCHRONOUS_IO_ALERT), io );
      return status;
  }
  
  /* do an ioctl call through the server */
  static NTSTATUS server_ioctl_file( HANDLE handle, HANDLE event,
                                     PIO_APC_ROUTINE apc, PVOID apc_context,
                                     IO_STATUS_BLOCK *io, ULONG code,
                                     const void *in_buffer, ULONG in_size,
                                     PVOID out_buffer, ULONG out_size )
  {
      struct async_irp *async;
      NTSTATUS status;
      HANDLE wait_handle;
      ULONG options;
  
      if (!(async = (struct async_irp *)alloc_fileio( sizeof(*async), irp_completion, handle )))
          return STATUS_NO_MEMORY;
      async->buffer  = out_buffer;
      async->size    = out_size;
  
      SERVER_START_REQ( ioctl )
      {
          req->code        = code;
          req->async       = server_async( handle, &async->io, event, apc, apc_context, io );
          wine_server_add_data( req, in_buffer, in_size );
          if ((code & 3) != METHOD_BUFFERED) wine_server_add_data( req, out_buffer, out_size );
          wine_server_set_reply( req, out_buffer, out_size );
          status = virtual_locked_server_call( req );
          wait_handle = wine_server_ptr_handle( reply->wait );
          options     = reply->options;
          if (wait_handle && status != STATUS_PENDING)
          {
              io->u.Status    = status;
              io->Information = wine_server_reply_size( reply );
          }
      }
      SERVER_END_REQ;
  
      if (status == STATUS_NOT_SUPPORTED)
          WARN("Unsupported ioctl %x (device=%x access=%x func=%x method=%x)\n",
               code, code >> 16, (code >> 14) & 3, (code >> 2) & 0xfff, code & 3);
  
      if (status != STATUS_PENDING) free( async );
  
      if (wait_handle) status = wait_async( wait_handle, (options & FILE_SYNCHRONOUS_IO_ALERT), io );
      return status;
  }
  
  
  struct io_timeouts
  {
      int interval;   /* max interval between two bytes */
      int total;      /* total timeout for the whole operation */
      int end_time;   /* absolute time of end of operation */
  };
  
  /* retrieve the I/O timeouts to use for a given handle */
  static NTSTATUS get_io_timeouts( HANDLE handle, enum server_fd_type type, ULONG count, BOOL is_read,
                                   struct io_timeouts *timeouts )
  {
      NTSTATUS status = STATUS_SUCCESS;
  
      timeouts->interval = timeouts->total = -1;
  
      switch(type)
      {
      case FD_TYPE_SERIAL:
      {
          /* GetCommTimeouts */
          SERIAL_TIMEOUTS st;
          IO_STATUS_BLOCK io;
  
          status = NtDeviceIoControlFile( handle, NULL, NULL, NULL, &io,
                                          IOCTL_SERIAL_GET_TIMEOUTS, NULL, 0, &st, sizeof(st) );
          if (status) break;
  
          if (is_read)
          {
              if (st.ReadIntervalTimeout)
                  timeouts->interval = st.ReadIntervalTimeout;
  
              if (st.ReadTotalTimeoutMultiplier || st.ReadTotalTimeoutConstant)
              {
                  timeouts->total = st.ReadTotalTimeoutConstant;
                  if (st.ReadTotalTimeoutMultiplier != MAXDWORD)
                      timeouts->total += count * st.ReadTotalTimeoutMultiplier;
              }
              else if (st.ReadIntervalTimeout == MAXDWORD)
                  timeouts->interval = timeouts->total = 0;
          }
          else  /* write */
          {
              if (st.WriteTotalTimeoutMultiplier || st.WriteTotalTimeoutConstant)
              {
                  timeouts->total = st.WriteTotalTimeoutConstant;
                  if (st.WriteTotalTimeoutMultiplier != MAXDWORD)
                      timeouts->total += count * st.WriteTotalTimeoutMultiplier;
              }
          }
          break;
      }
      case FD_TYPE_MAILSLOT:
          if (is_read)
          {
              timeouts->interval = 0;  /* return as soon as we got something */
              SERVER_START_REQ( set_mailslot_info )
              {
                  req->handle = wine_server_obj_handle( handle );
                  req->flags = 0;
                  if (!(status = wine_server_call( req )) &&
                      reply->read_timeout != TIMEOUT_INFINITE)
                      timeouts->total = reply->read_timeout / -10000;
              }
              SERVER_END_REQ;
          }
          break;
      case FD_TYPE_SOCKET:
      case FD_TYPE_CHAR:
          if (is_read) timeouts->interval = 0;  /* return as soon as we got something */
          break;
      default:
          break;
      }
      if (timeouts->total != -1) timeouts->end_time = NtGetTickCount() + timeouts->total;
      return STATUS_SUCCESS;
  }
  
  
  /* retrieve the timeout for the next wait, in milliseconds */
  static inline int get_next_io_timeout( const struct io_timeouts *timeouts, ULONG already )
  {
      int ret = -1;
  
      if (timeouts->total != -1)
      {
          ret = timeouts->end_time - NtGetTickCount();
          if (ret < 0) ret = 0;
      }
      if (already && timeouts->interval != -1)
      {
          if (ret == -1 || ret > timeouts->interval) ret = timeouts->interval;
      }
      return ret;
  }
  
  
  /* retrieve the avail_mode flag for async reads */
  static NTSTATUS get_io_avail_mode( HANDLE handle, enum server_fd_type type, BOOL *avail_mode )
  {
      NTSTATUS status = STATUS_SUCCESS;
  
      switch(type)
      {
      case FD_TYPE_SERIAL:
      {
          /* GetCommTimeouts */
          SERIAL_TIMEOUTS st;
          IO_STATUS_BLOCK io;
  
          status = NtDeviceIoControlFile( handle, NULL, NULL, NULL, &io,
                                          IOCTL_SERIAL_GET_TIMEOUTS, NULL, 0, &st, sizeof(st) );
          if (status) break;
          *avail_mode = (!st.ReadTotalTimeoutMultiplier &&
                         !st.ReadTotalTimeoutConstant &&
                         st.ReadIntervalTimeout == MAXDWORD);
          break;
      }
      case FD_TYPE_MAILSLOT:
      case FD_TYPE_SOCKET:
      case FD_TYPE_CHAR:
          *avail_mode = TRUE;
          break;
      default:
          *avail_mode = FALSE;
          break;
      }
      return status;
  }
  
  /* register an async I/O for a file read; helper for NtReadFile */
  static NTSTATUS register_async_file_read( HANDLE handle, HANDLE event,
                                            PIO_APC_ROUTINE apc, void *apc_user,
                                            IO_STATUS_BLOCK *iosb, void *buffer,
                                            ULONG already, ULONG length, BOOL avail_mode )
  {
      struct async_fileio_read *fileio;
      NTSTATUS status;
  
      if (!(fileio = (struct async_fileio_read *)alloc_fileio( sizeof(*fileio), async_read_proc, handle )))
          return STATUS_NO_MEMORY;
  
      fileio->already = already;
      fileio->count = length;
      fileio->buffer = buffer;
      fileio->avail_mode = avail_mode;
  
      SERVER_START_REQ( register_async )
      {
          req->type   = ASYNC_TYPE_READ;
          req->count  = length;
          req->async  = server_async( handle, &fileio->io, event, apc, apc_user, iosb );
          status = wine_server_call( req );
      }
      SERVER_END_REQ;
  
      if (status != STATUS_PENDING) free( fileio );
      return status;
  }
  
  static void add_completion( HANDLE handle, ULONG_PTR value, NTSTATUS status, ULONG info, BOOL async )
  {
      SERVER_START_REQ( add_fd_completion )
      {
          req->handle      = wine_server_obj_handle( handle );
          req->cvalue      = value;
          req->status      = status;
          req->information = info;
          req->async       = async;
          wine_server_call( req );
      }
      SERVER_END_REQ;
  }
  
  static NTSTATUS set_pending_write( HANDLE device )
  {
      NTSTATUS status;
  
      SERVER_START_REQ( set_serial_info )
      {
          req->handle = wine_server_obj_handle( device );
          req->flags  = SERIALINFO_PENDING_WRITE;
          status = wine_server_call( req );
      }
      SERVER_END_REQ;
      return status;
  }
  
  
  /******************************************************************************
   *              NtReadFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtReadFile( HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc, void *apc_user,
                              IO_STATUS_BLOCK *io, void *buffer, ULONG length,
                              LARGE_INTEGER *offset, ULONG *key )
  {
      int result, unix_handle, needs_close;
      unsigned int options;
      struct io_timeouts timeouts;
      NTSTATUS status, ret_status;
      ULONG total = 0;
      enum server_fd_type type;
      ULONG_PTR cvalue = apc ? 0 : (ULONG_PTR)apc_user;
      BOOL send_completion = FALSE, async_read, timeout_init_done = FALSE;
  
      TRACE( "(%p,%p,%p,%p,%p,%p,0x%08x,%p,%p)\n",
             handle, event, apc, apc_user, io, buffer, length, offset, key );
  
      if (!io) return STATUS_ACCESS_VIOLATION;
  
      status = server_get_unix_fd( handle, FILE_READ_DATA, &unix_handle, &needs_close, &type, &options );
      if (status && status != STATUS_BAD_DEVICE_TYPE) return status;
  
      if (!virtual_check_buffer_for_write( buffer, length )) return STATUS_ACCESS_VIOLATION;
  
      if (status == STATUS_BAD_DEVICE_TYPE)
          return server_read_file( handle, event, apc, apc_user, io, buffer, length, offset, key );
  
      async_read = !(options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT));
  
      if (type == FD_TYPE_FILE)
      {
          if (async_read && (!offset || offset->QuadPart < 0))
          {
              status = STATUS_INVALID_PARAMETER;
              goto done;
          }
  
          if (offset && offset->QuadPart != FILE_USE_FILE_POINTER_POSITION)
          {
              /* async I/O doesn't make sense on regular files */
              while ((result = virtual_locked_pread( unix_handle, buffer, length, offset->QuadPart )) == -1)
              {
                  if (errno != EINTR)
                  {
                      status = errno_to_status( errno );
                      goto done;
                  }
              }
              if (!async_read) /* update file pointer position */
                  lseek( unix_handle, offset->QuadPart + result, SEEK_SET );
  
              total = result;
              status = (total || !length) ? STATUS_SUCCESS : STATUS_END_OF_FILE;
              goto done;
          }
      }
      else if (type == FD_TYPE_SERIAL || type == FD_TYPE_DEVICE)
      {
          if (async_read && (!offset || offset->QuadPart < 0))
          {
              status = STATUS_INVALID_PARAMETER;
              goto done;
          }
      }
  
      if (type == FD_TYPE_SERIAL && async_read && length)
      {
          /* an asynchronous serial port read with a read interval timeout needs to
             skip the synchronous read to make sure that the server starts the read
             interval timer after the first read */
          if ((status = get_io_timeouts( handle, type, length, TRUE, &timeouts ))) goto err;
          if (timeouts.interval)
          {
              status = register_async_file_read( handle, event, apc, apc_user, io,
                                                 buffer, total, length, FALSE );
              goto err;
          }
      }
  
      for (;;)
      {
          if ((result = virtual_locked_read( unix_handle, (char *)buffer + total, length - total )) >= 0)
          {
              total += result;
              if (!result || total == length)
              {
                  if (total)
                  {
                      status = STATUS_SUCCESS;
                      goto done;
                  }
                  switch (type)
                  {
                  case FD_TYPE_FILE:
                  case FD_TYPE_CHAR:
                  case FD_TYPE_DEVICE:
                      status = length ? STATUS_END_OF_FILE : STATUS_SUCCESS;
                      goto done;
                  case FD_TYPE_SERIAL:
                      if (!length)
                      {
                          status = STATUS_SUCCESS;
                          goto done;
                      }
                      break;
                  default:
                      status = STATUS_PIPE_BROKEN;
                      goto err;
                  }
              }
              else if (type == FD_TYPE_FILE) continue;  /* no async I/O on regular files */
          }
          else if (errno != EAGAIN)
          {
              if (errno == EINTR) continue;
              if (!total) status = errno_to_status( errno );
              goto err;
          }
  
          if (async_read)
          {
              BOOL avail_mode;
  
              if ((status = get_io_avail_mode( handle, type, &avail_mode ))) goto err;
              if (total && avail_mode)
              {
                  status = STATUS_SUCCESS;
                  goto done;
              }
              status = register_async_file_read( handle, event, apc, apc_user, io,
                                                 buffer, total, length, avail_mode );
              goto err;
          }
          else  /* synchronous read, wait for the fd to become ready */
          {
              struct pollfd pfd;
              int ret, timeout;
  
              if (!timeout_init_done)
              {
                  timeout_init_done = TRUE;
                  if ((status = get_io_timeouts( handle, type, length, TRUE, &timeouts ))) goto err;
                  if (event) NtResetEvent( event, NULL );
              }
              timeout = get_next_io_timeout( &timeouts, total );
  
              pfd.fd = unix_handle;
              pfd.events = POLLIN;
  
              if (!timeout || !(ret = poll( &pfd, 1, timeout )))
              {
                  if (total)  /* return with what we got so far */
                      status = STATUS_SUCCESS;
                  else
                      status = (type == FD_TYPE_MAILSLOT) ? STATUS_IO_TIMEOUT : STATUS_TIMEOUT;
                  goto done;
              }
              if (ret == -1 && errno != EINTR)
              {
                  status = errno_to_status( errno );
                  goto done;
              }
              /* will now restart the read */
          }
      }
  
  done:
      send_completion = cvalue != 0;
  
  err:
      if (needs_close) close( unix_handle );
      if (status == STATUS_SUCCESS || (status == STATUS_END_OF_FILE && (!async_read || type == FD_TYPE_FILE)))
      {
          io->u.Status = status;
          io->Information = total;
          TRACE("= SUCCESS (%u)\n", total);
          if (event) NtSetEvent( event, NULL );
          if (apc && (!status || async_read)) NtQueueApcThread( GetCurrentThread(), (PNTAPCFUNC)apc,
                                                (ULONG_PTR)apc_user, (ULONG_PTR)io, 0 );
      }
      else
      {
          TRACE("= 0x%08x\n", status);
          if (status != STATUS_PENDING && event) NtResetEvent( event, NULL );
      }
  
      ret_status = async_read && type == FD_TYPE_FILE && (status == STATUS_SUCCESS || status == STATUS_END_OF_FILE)
              ? STATUS_PENDING : status;
  
      if (send_completion) add_completion( handle, cvalue, status, total, ret_status == STATUS_PENDING );
      return ret_status;
  }
  
  
  /******************************************************************************
   *              NtReadFileScatter   (NTDLL.@)
   */
  NTSTATUS WINAPI NtReadFileScatter( HANDLE file, HANDLE event, PIO_APC_ROUTINE apc, void *apc_user,
                                     IO_STATUS_BLOCK *io, FILE_SEGMENT_ELEMENT *segments,
                                     ULONG length, LARGE_INTEGER *offset, ULONG *key )
  {
      int result, unix_handle, needs_close;
      unsigned int options;
      NTSTATUS status;
      ULONG pos = 0, total = 0;
      enum server_fd_type type;
      ULONG_PTR cvalue = apc ? 0 : (ULONG_PTR)apc_user;
      BOOL send_completion = FALSE;
  
      TRACE( "(%p,%p,%p,%p,%p,%p,0x%08x,%p,%p),partial stub!\n",
             file, event, apc, apc_user, io, segments, length, offset, key );
  
      if (!io) return STATUS_ACCESS_VIOLATION;
  
      status = server_get_unix_fd( file, FILE_READ_DATA, &unix_handle, &needs_close, &type, &options );
      if (status) return status;
  
      if ((type != FD_TYPE_FILE) ||
          (options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT)) ||
          !(options & FILE_NO_INTERMEDIATE_BUFFERING))
      {
          status = STATUS_INVALID_PARAMETER;
          goto error;
      }
  
      while (length)
      {
          if (offset && offset->QuadPart != FILE_USE_FILE_POINTER_POSITION)
              result = pread( unix_handle, (char *)segments->Buffer + pos,
                              min( length - pos, page_size - pos ), offset->QuadPart + total );
          else
              result = read( unix_handle, (char *)segments->Buffer + pos, min( length - pos, page_size - pos ) );
  
          if (result == -1)
          {
              if (errno == EINTR) continue;
              status = errno_to_status( errno );
              break;
          }
          if (!result) break;
          total += result;
          length -= result;
          if ((pos += result) == page_size)
          {
              pos = 0;
              segments++;
          }
      }
  
      if (total == 0) status = STATUS_END_OF_FILE;
  
      send_completion = cvalue != 0;
  
      if (needs_close) close( unix_handle );
      io->u.Status = status;
      io->Information = total;
      TRACE("= 0x%08x (%u)\n", status, total);
      if (event) NtSetEvent( event, NULL );
      if (apc) NtQueueApcThread( GetCurrentThread(), (PNTAPCFUNC)apc,
                                 (ULONG_PTR)apc_user, (ULONG_PTR)io, 0 );
      if (send_completion) add_completion( file, cvalue, status, total, TRUE );
  
      return STATUS_PENDING;
  
  error:
      if (needs_close) close( unix_handle );
      if (event) NtResetEvent( event, NULL );
      TRACE("= 0x%08x\n", status);
      return status;
  }
  
  
  /******************************************************************************
   *              NtWriteFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtWriteFile( HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc, void *apc_user,
                               IO_STATUS_BLOCK *io, const void *buffer, ULONG length,
                               LARGE_INTEGER *offset, ULONG *key )
  {
      int result, unix_handle, needs_close;
      unsigned int options;
      struct io_timeouts timeouts;
      NTSTATUS status, ret_status;
      ULONG total = 0;
      enum server_fd_type type;
      ULONG_PTR cvalue = apc ? 0 : (ULONG_PTR)apc_user;
      BOOL send_completion = FALSE, async_write, append_write = FALSE, timeout_init_done = FALSE;
      LARGE_INTEGER offset_eof;
  
      TRACE( "(%p,%p,%p,%p,%p,%p,0x%08x,%p,%p)\n",
             handle, event, apc, apc_user, io, buffer, length, offset, key );
  
      if (!io) return STATUS_ACCESS_VIOLATION;
  
      status = server_get_unix_fd( handle, FILE_WRITE_DATA, &unix_handle, &needs_close, &type, &options );
      if (status == STATUS_ACCESS_DENIED)
      {
          status = server_get_unix_fd( handle, FILE_APPEND_DATA, &unix_handle,
                                       &needs_close, &type, &options );
          append_write = TRUE;
      }
      if (status && status != STATUS_BAD_DEVICE_TYPE) return status;
  
      async_write = !(options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT));
  
      if (!virtual_check_buffer_for_read( buffer, length ))
      {
          status = STATUS_INVALID_USER_BUFFER;
          goto done;
      }
  
      if (status == STATUS_BAD_DEVICE_TYPE)
          return server_write_file( handle, event, apc, apc_user, io, buffer, length, offset, key );
  
      if (type == FD_TYPE_FILE)
      {
          if (async_write &&
              (!offset || (offset->QuadPart < 0 && offset->QuadPart != FILE_WRITE_TO_END_OF_FILE)))
          {
              status = STATUS_INVALID_PARAMETER;
              goto done;
          }
  
          if (append_write)
          {
              offset_eof.QuadPart = FILE_WRITE_TO_END_OF_FILE;
              offset = &offset_eof;
          }
  
          if (offset && offset->QuadPart != FILE_USE_FILE_POINTER_POSITION)
          {
              off_t off = offset->QuadPart;
  
              if (offset->QuadPart == FILE_WRITE_TO_END_OF_FILE)
              {
                  struct stat st;
  
                  if (fstat( unix_handle, &st ) == -1)
                  {
                      status = errno_to_status( errno );
                      goto done;
                  }
                  off = st.st_size;
              }
              else if (offset->QuadPart < 0)
              {
                  status = STATUS_INVALID_PARAMETER;
                  goto done;
              }
  
              /* async I/O doesn't make sense on regular files */
              while ((result = pwrite( unix_handle, buffer, length, off )) == -1)
              {
                  if (errno != EINTR)
                  {
                      if (errno == EFAULT) status = STATUS_INVALID_USER_BUFFER;
                      else status = errno_to_status( errno );
                      goto done;
                  }
              }
  
              if (!async_write) /* update file pointer position */
                  lseek( unix_handle, off + result, SEEK_SET );
  
              total = result;
              status = STATUS_SUCCESS;
              goto done;
          }
      }
      else if (type == FD_TYPE_SERIAL || type == FD_TYPE_DEVICE)
      {
          if (async_write &&
              (!offset || (offset->QuadPart < 0 && offset->QuadPart != FILE_WRITE_TO_END_OF_FILE)))
          {
              status = STATUS_INVALID_PARAMETER;
              goto done;
          }
      }
  
      for (;;)
      {
          /* zero-length writes on sockets may not work with plain write(2) */
          if (!length && (type == FD_TYPE_MAILSLOT || type == FD_TYPE_SOCKET))
              result = send( unix_handle, buffer, 0, 0 );
          else
              result = write( unix_handle, (const char *)buffer + total, length - total );
  
          if (result >= 0)
          {
              total += result;
              if (total == length)
              {
                  status = STATUS_SUCCESS;
                  goto done;
              }
              if (type == FD_TYPE_FILE) continue;  /* no async I/O on regular files */
          }
          else if (errno != EAGAIN)
          {
              if (errno == EINTR) continue;
              if (!total)
              {
                  if (errno == EFAULT) status = STATUS_INVALID_USER_BUFFER;
                  else status = errno_to_status( errno );
              }
              goto err;
          }
  
          if (async_write)
          {
              struct async_fileio_write *fileio;
  
              fileio = (struct async_fileio_write *)alloc_fileio( sizeof(*fileio), async_write_proc, handle );
              if (!fileio)
              {
                  status = STATUS_NO_MEMORY;
                  goto err;
              }
              fileio->already = total;
              fileio->count = length;
              fileio->buffer = buffer;
  
              SERVER_START_REQ( register_async )
              {
                  req->type   = ASYNC_TYPE_WRITE;
                  req->count  = length;
                  req->async  = server_async( handle, &fileio->io, event, apc, apc_user, io );
                  status = wine_server_call( req );
              }
              SERVER_END_REQ;
  
              if (status != STATUS_PENDING) free( fileio );
              goto err;
          }
          else  /* synchronous write, wait for the fd to become ready */
          {
              struct pollfd pfd;
              int ret, timeout;
  
              if (!timeout_init_done)
              {
                  timeout_init_done = TRUE;
                  if ((status = get_io_timeouts( handle, type, length, FALSE, &timeouts )))
                      goto err;
                  if (event) NtResetEvent( event, NULL );
              }
              timeout = get_next_io_timeout( &timeouts, total );
  
              pfd.fd = unix_handle;
              pfd.events = POLLOUT;
  
              if (!timeout || !(ret = poll( &pfd, 1, timeout )))
              {
                  /* return with what we got so far */
                  status = total ? STATUS_SUCCESS : STATUS_TIMEOUT;
                  goto done;
              }
              if (ret == -1 && errno != EINTR)
              {
                  status = errno_to_status( errno );
                  goto done;
              }
              /* will now restart the write */
          }
      }
  
  done:
      send_completion = cvalue != 0;
  
  err:
      if (needs_close) close( unix_handle );
  
      if (type == FD_TYPE_SERIAL && (status == STATUS_SUCCESS || status == STATUS_PENDING))
          set_pending_write( handle );
  
      if (status == STATUS_SUCCESS)
      {
          io->u.Status = status;
          io->Information = total;
          TRACE("= SUCCESS (%u)\n", total);
          if (event) NtSetEvent( event, NULL );
          if (apc) NtQueueApcThread( GetCurrentThread(), (PNTAPCFUNC)apc,
                                     (ULONG_PTR)apc_user, (ULONG_PTR)io, 0 );
      }
      else
      {
          TRACE("= 0x%08x\n", status);
          if (status != STATUS_PENDING && event) NtResetEvent( event, NULL );
      }
  
      ret_status = async_write && type == FD_TYPE_FILE && status == STATUS_SUCCESS ? STATUS_PENDING : status;
      if (send_completion) add_completion( handle, cvalue, status, total, ret_status == STATUS_PENDING );
      return ret_status;
  }
  
  
  /******************************************************************************
   *              NtWriteFileGather   (NTDLL.@)
   */
  NTSTATUS WINAPI NtWriteFileGather( HANDLE file, HANDLE event, PIO_APC_ROUTINE apc, void *apc_user,
                                     IO_STATUS_BLOCK *io, FILE_SEGMENT_ELEMENT *segments,
                                     ULONG length, LARGE_INTEGER *offset, ULONG *key )
  {
      int result, unix_handle, needs_close;
      unsigned int options;
      NTSTATUS status;
      ULONG pos = 0, total = 0;
      enum server_fd_type type;
      ULONG_PTR cvalue = apc ? 0 : (ULONG_PTR)apc_user;
      BOOL send_completion = FALSE;
  
      TRACE( "(%p,%p,%p,%p,%p,%p,0x%08x,%p,%p),partial stub!\n",
             file, event, apc, apc_user, io, segments, length, offset, key );
  
      if (length % page_size) return STATUS_INVALID_PARAMETER;
      if (!io) return STATUS_ACCESS_VIOLATION;
  
      status = server_get_unix_fd( file, FILE_WRITE_DATA, &unix_handle, &needs_close, &type, &options );
      if (status) return status;
  
      if ((type != FD_TYPE_FILE) ||
          (options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT)) ||
          !(options & FILE_NO_INTERMEDIATE_BUFFERING))
      {
          status = STATUS_INVALID_PARAMETER;
          goto done;
      }
  
      while (length)
      {
          if (offset && offset->QuadPart != FILE_USE_FILE_POINTER_POSITION)
              result = pwrite( unix_handle, (char *)segments->Buffer + pos,
                               page_size - pos, offset->QuadPart + total );
          else
              result = write( unix_handle, (char *)segments->Buffer + pos, page_size - pos );
  
          if (result == -1)
          {
              if (errno == EINTR) continue;
              if (errno == EFAULT)
              {
                  status = STATUS_INVALID_USER_BUFFER;
                  goto done;
              }
              status = errno_to_status( errno );
              break;
          }
          if (!result)
          {
              status = STATUS_DISK_FULL;
              break;
          }
          total += result;
          length -= result;
          if ((pos += result) == page_size)
          {
              pos = 0;
              segments++;
          }
      }
  
      send_completion = cvalue != 0;
  
   done:
      if (needs_close) close( unix_handle );
      if (status == STATUS_SUCCESS)
      {
          io->u.Status = status;
          io->Information = total;
          TRACE("= SUCCESS (%u)\n", total);
          if (event) NtSetEvent( event, NULL );
          if (apc) NtQueueApcThread( GetCurrentThread(), (PNTAPCFUNC)apc,
                                     (ULONG_PTR)apc_user, (ULONG_PTR)io, 0 );
      }
      else
      {
          TRACE("= 0x%08x\n", status);
          if (status != STATUS_PENDING && event) NtResetEvent( event, NULL );
      }
      if (send_completion) add_completion( file, cvalue, status, total, FALSE );
      return status;
  }
  
  
  /******************************************************************************
   *              NtDeviceIoControlFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtDeviceIoControlFile( HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc, void *apc_context,
                                         IO_STATUS_BLOCK *io, ULONG code, void *in_buffer, ULONG in_size,
                                         void *out_buffer, ULONG out_size )
  {
      ULONG device = (code >> 16);
      NTSTATUS status = STATUS_NOT_SUPPORTED;
  
      TRACE( "(%p,%p,%p,%p,%p,0x%08x,%p,0x%08x,%p,0x%08x)\n",
             handle, event, apc, apc_context, io, code, in_buffer, in_size, out_buffer, out_size );
  
      switch (device)
      {
      case FILE_DEVICE_DISK:
      case FILE_DEVICE_CD_ROM:
      case FILE_DEVICE_DVD:
      case FILE_DEVICE_CONTROLLER:
      case FILE_DEVICE_MASS_STORAGE:
          status = cdrom_DeviceIoControl( handle, event, apc, apc_context, io, code,
                                          in_buffer, in_size, out_buffer, out_size );
          break;
      case FILE_DEVICE_SERIAL_PORT:
          status = serial_DeviceIoControl( handle, event, apc, apc_context, io, code,
                                           in_buffer, in_size, out_buffer, out_size );
          break;
      case FILE_DEVICE_TAPE:
          status = tape_DeviceIoControl( handle, event, apc, apc_context, io, code,
                                         in_buffer, in_size, out_buffer, out_size );
          break;
      }
  
      if (status == STATUS_NOT_SUPPORTED || status == STATUS_BAD_DEVICE_TYPE)
          return server_ioctl_file( handle, event, apc, apc_context, io, code,
                                    in_buffer, in_size, out_buffer, out_size );
  
      if (status != STATUS_PENDING) io->u.Status = status;
      return status;
  }
  
  
  /* Tell Valgrind to ignore any holes in structs we will be passing to the
   * server */
  static void ignore_server_ioctl_struct_holes( ULONG code, const void *in_buffer, ULONG in_size )
  {
  #ifdef VALGRIND_MAKE_MEM_DEFINED
  # define IGNORE_STRUCT_HOLE(buf, size, t, f1, f2) \
      do { \
          if (FIELD_OFFSET(t, f1) + sizeof(((t *)0)->f1) < FIELD_OFFSET(t, f2)) \
              if ((size) >= FIELD_OFFSET(t, f2)) \
                  VALGRIND_MAKE_MEM_DEFINED( \
                      (const char *)(buf) + FIELD_OFFSET(t, f1) + sizeof(((t *)0)->f1), \
                      FIELD_OFFSET(t, f2) - FIELD_OFFSET(t, f1) + sizeof(((t *)0)->f1)); \
      } while (0)
  
      switch (code)
      {
      case FSCTL_PIPE_WAIT:
          IGNORE_STRUCT_HOLE(in_buffer, in_size, FILE_PIPE_WAIT_FOR_BUFFER, TimeoutSpecified, Name);
          break;
      }
  #endif
  }
  
  
  /*
   * Retrieve the unix name corresponding to a file handle, remove that directory, and then symlink
   * the requested directory to the location of the old directory.
   */
  NTSTATUS FILE_CreateSymlink(HANDLE handle, REPARSE_DATA_BUFFER *buffer)
  {
      BOOL src_allocated = FALSE, path_allocated = FALSE, dest_allocated = FALSE;
      BOOL nt_dest_allocated = FALSE, tempdir_created = FALSE;
      char *unix_src, *unix_dest, *unix_path = NULL;
      char tmpdir[PATH_MAX], tmplink[PATH_MAX], *d;
      SIZE_T unix_dest_len = PATH_MAX;
      char magic_dest[PATH_MAX];
      int dest_fd, needs_close;
      int relative_offset = 0;
      UNICODE_STRING nt_dest;
      int dest_len, offset;
      BOOL is_dir = TRUE;
      NTSTATUS status;
      struct stat st;
      WCHAR *dest;
      ULONG flags;
      int i;
  
      switch(buffer->ReparseTag)
      {
      case IO_REPARSE_TAG_MOUNT_POINT:
          dest_len = buffer->MountPointReparseBuffer.SubstituteNameLength;
          offset = buffer->MountPointReparseBuffer.SubstituteNameOffset;
          dest = &buffer->MountPointReparseBuffer.PathBuffer[offset];
          flags = 0;
          break;
      case IO_REPARSE_TAG_SYMLINK:
          dest_len = buffer->SymbolicLinkReparseBuffer.SubstituteNameLength;
          offset = buffer->SymbolicLinkReparseBuffer.SubstituteNameOffset;
          dest = &buffer->SymbolicLinkReparseBuffer.PathBuffer[offset];
          flags = buffer->SymbolicLinkReparseBuffer.Flags;
          break;
      default:
          return STATUS_NOT_IMPLEMENTED;
      }
  
      if ((status = server_get_unix_fd( handle, FILE_SPECIAL_ACCESS, &dest_fd, &needs_close, NULL, NULL )))
          return status;
  
      if ((status = server_get_unix_name( handle, &unix_src )))
          goto cleanup;
      src_allocated = TRUE;
      if (flags == SYMLINK_FLAG_RELATIVE)
      {
          SIZE_T nt_path_len = PATH_MAX, unix_path_len = PATH_MAX;
          WCHAR *nt_path;
  
          /* resolve the NT path of the source */
          unix_path = malloc( strlen(unix_src) + 2 );
          path_allocated = TRUE;
          strcpy( unix_path, unix_src );
          d = dirname( unix_path );
          if (d != unix_path) strcpy( unix_path, d );
          strcat( unix_path, "/");
          for (;;)
          {
              nt_path = malloc( nt_path_len * sizeof(WCHAR) );
              if (!nt_path)
              {
                  status = STATUS_NO_MEMORY;
                  goto cleanup;
              }
              status = wine_unix_to_nt_file_name( unix_path, nt_path, &nt_path_len );
              if (status != STATUS_BUFFER_TOO_SMALL) break;
              free( nt_path );
          }
          if (status != STATUS_SUCCESS)
              goto cleanup;
          free(unix_path);
          /* re-resolve the unix path for the source */
          for (;;)
          {
              UNICODE_STRING nt_path_tmp;
              unix_path = malloc( unix_path_len );
              if (!unix_path)
              {
                  status = STATUS_NO_MEMORY;
                  goto cleanup;
              }
              nt_path_tmp.Buffer = nt_path;
              nt_path_tmp.Length = lstrlenW(nt_path) * sizeof(WCHAR);
              status = wine_nt_to_unix_file_name( &nt_path_tmp, unix_path, &unix_path_len, FALSE );
              if (status != STATUS_BUFFER_TOO_SMALL) break;
              free( unix_path );
          }
          /* append the destination */
          nt_dest.MaximumLength = dest_len + (lstrlenW( nt_path ) + 1) * sizeof(WCHAR);
          nt_dest.Buffer = RtlAllocateHeap( GetProcessHeap(), 0, nt_dest.MaximumLength );
          lstrcpyW( nt_dest.Buffer, nt_path );
          free( nt_path );
          memcpy( &nt_dest.Buffer[lstrlenW(nt_dest.Buffer)], dest, dest_len + sizeof(WCHAR));
          nt_dest.Length = lstrlenW( nt_dest.Buffer ) * sizeof(WCHAR);
      }
      else
      {
          RtlCreateUnicodeString( &nt_dest, dest );
          nt_dest.Length = dest_len;
      }
      nt_dest_allocated = TRUE;
      /* resolve the NT path of the destination */
      for (;;)
      {
          unix_dest = malloc( unix_dest_len );
          if (!unix_dest)
          {
              status = STATUS_NO_MEMORY;
              goto cleanup;
          }
          status = wine_nt_to_unix_file_name( &nt_dest, unix_dest, &unix_dest_len, FILE_WINE_PATH );
          if (status != STATUS_BUFFER_TOO_SMALL) break;
          free( unix_dest );
      }
      if (status != STATUS_SUCCESS && status != STATUS_NO_SUCH_FILE)
          goto cleanup;
      dest_allocated = TRUE;
      /* check that the source and destination paths are the same up to the relative path */
      if (flags == SYMLINK_FLAG_RELATIVE)
      {
          relative_offset = strlen(unix_path);
          if (strncmp( unix_path, unix_dest, relative_offset ) != 0)
          {
              status = STATUS_IO_REPARSE_DATA_INVALID;
              goto cleanup;
          }
      }
  
      TRACE( "Linking %s to %s\n", unix_src, &unix_dest[relative_offset] );
  
      /* Encode the reparse tag into the symlink */
      strcpy( magic_dest, "" );
      if (flags == SYMLINK_FLAG_RELATIVE)
          strcat( magic_dest, "." );
      strcat( magic_dest, "/" );
      for (i = 0; i < sizeof(ULONG)*8; i++)
      {
          if ((buffer->ReparseTag >> i) & 1)
              strcat( magic_dest, "." );
          strcat( magic_dest, "/" );
      }
      /* Encode the type (file or directory) if NT symlink */
      if (buffer->ReparseTag == IO_REPARSE_TAG_SYMLINK)
      {
          if (fstat( dest_fd, &st ) == -1)
          {
              status = errno_to_status( errno );
              goto cleanup;
          }
          is_dir = S_ISDIR(st.st_mode);
          if (is_dir)
              strcat( magic_dest, "." );
          strcat( magic_dest, "/" );
      }
      strcat( magic_dest, &unix_dest[relative_offset] );
  
      /* Produce the link in a temporary location in the same folder */
      strcpy( tmpdir, unix_src );
      d = dirname( tmpdir);
      if (d != tmpdir) strcpy( tmpdir, d );
      strcat( tmpdir, "/.winelink.XXXXXX" );
      if (mkdtemp( tmpdir ) == NULL)
      {
          status = errno_to_status( errno );
          goto cleanup;
      }
      tempdir_created = TRUE;
      strcpy( tmplink, tmpdir );
      strcat( tmplink, "/tmplink" );
      if (symlink( magic_dest, tmplink ))
      {
          status = errno_to_status( errno );
          goto cleanup;
      }
      /* Atomically move the link into position */
      if (!renameat2( -1, tmplink, -1, unix_src, RENAME_EXCHANGE ))
      {
          /* success: link and folder/file have switched locations */
          if (is_dir)
              rmdir( tmplink ); /* remove the folder (at link location) */
          else
              unlink( tmplink ); /* remove the file (at link location) */
      }
      else if (errno == ENOSYS)
      {
          FIXME( "Atomic exchange of directory with symbolic link unsupported on this system, "
                 "using unsafe exchange instead.\n" );
          if (rmdir( unix_src ))
          {
              status = errno_to_status( errno );
              goto cleanup;
          }
          if (rename( tmplink, unix_src ))
          {
              status = errno_to_status( errno );
              goto cleanup; /* not moved, orignal file/folder at destination is orphaned */
          }
      }
      else
      {
          status = errno_to_status( errno );
          goto cleanup;
      }
      status = STATUS_SUCCESS;
  
  cleanup:
      if (tempdir_created) rmdir( tmpdir );
      if (path_allocated) free( unix_path );
      if (dest_allocated) free( unix_dest );
      if (nt_dest_allocated) RtlFreeUnicodeString( &nt_dest );
      if (src_allocated) free( unix_src );
      if (needs_close) close( dest_fd );
      return status;
  }
  
  
  NTSTATUS FILE_DecodeSymlink(const char *unix_src, char *unix_dest, int *unix_dest_len,
                              DWORD *tag, ULONG *flags, BOOL *is_dir)
  {
      int len = MAX_PATH;
      DWORD reparse_tag;
      NTSTATUS status;
      BOOL dir_flag;
      char *p, *tmp;
      ssize_t ret;
      int i;
  
      if (unix_dest_len) len = *unix_dest_len;
      if (!unix_dest)
          tmp = malloc( len );
      else
          tmp = unix_dest;
      if ((ret = readlink( unix_src, tmp, len )) < 0)
      {
          status = errno_to_status( errno );
          goto cleanup;
      }
      len = ret;
  
      /* Decode the reparse tag from the symlink */
      p = tmp;
      if (*p == '.')
      {
          if (flags) *flags = SYMLINK_FLAG_RELATIVE;
          p++;
      }
      if (*p++ != '/')
      {
          status = STATUS_NOT_IMPLEMENTED;
          goto cleanup;
      }
      reparse_tag = 0;
      for (i = 0; i < sizeof(ULONG)*8; i++)
      {
          char c = *p++;
          int val;
  
          if (c == '/')
              val = 0;
          else if (c == '.' && *p++ == '/')
              val = 1;
          else
          {
              status = STATUS_NOT_IMPLEMENTED;
              goto cleanup;
          }
          reparse_tag |= (val << i);
      }
      /* skip past the directory/file flag */
      if (reparse_tag == IO_REPARSE_TAG_SYMLINK)
      {
          char c = *p++;
  
          if (c == '/')
              dir_flag = FALSE;
          else if (c == '.' && *p++ == '/')
              dir_flag = TRUE;
          else
          {
              status = STATUS_NOT_IMPLEMENTED;
              goto cleanup;
          }
      }
      else
          dir_flag = TRUE;
      len -= (p - tmp);
      if (tag) *tag = reparse_tag;
      if (is_dir) *is_dir = dir_flag;
      if (unix_dest) memmove(unix_dest, p, len + 1);
      if (unix_dest_len) *unix_dest_len = len;
      status = STATUS_SUCCESS;
  
  cleanup:
      if (!unix_dest) free( tmp );
      return status;
  }
  
  
  /*
   * Retrieve the unix name corresponding to a file handle and use that to find the destination of the
   * symlink corresponding to that file handle.
   */
  NTSTATUS FILE_GetSymlink(HANDLE handle, REPARSE_DATA_BUFFER *buffer, ULONG out_size)
  {
      char *unix_src, unix_dest[PATH_MAX];
      VOID *subst_name, *print_name;
      SIZE_T nt_dest_len = PATH_MAX;
      int unix_dest_len = PATH_MAX;
      BOOL dest_allocated = FALSE;
      int dest_fd, needs_close;
      int path_len = 0;
      DWORD max_length;
      NTSTATUS status;
      ULONG flags = 0;
      WCHAR *nt_dest;
      INT prefix_len;
  
      if ((status = server_get_unix_fd( handle, FILE_ANY_ACCESS, &dest_fd, &needs_close, NULL, NULL )))
          return status;
  
      if ((status = server_get_unix_name( handle, &unix_src )))
          goto cleanup;
  
      if ((status = FILE_DecodeSymlink( unix_src, unix_dest, &unix_dest_len, &buffer->ReparseTag, &flags, NULL )))
          goto cleanup;
  
      /* convert the relative path into an absolute path */
      if (flags == SYMLINK_FLAG_RELATIVE)
      {
          int unix_src_len = strlen(unix_src);
          int offset = unix_src_len + 2;
          char *d;
  
          memcpy( &unix_dest[offset], unix_dest, unix_dest_len );
          unix_dest[offset+unix_dest_len] = 0;
          memcpy( unix_dest, unix_src, unix_src_len );
          unix_dest[unix_src_len] = 0;
          d = dirname( unix_dest );
          if (d != unix_dest) strcpy( unix_dest, d );
          strcat( unix_dest, "/" );
          path_len = strlen( unix_dest );
          memmove( &unix_dest[path_len], &unix_dest[offset], unix_dest_len + 1 );
          unix_dest_len = strlen( unix_dest );
      }
      /* resolve the NT path */
      for (;;)
      {
          nt_dest = malloc( nt_dest_len * sizeof(WCHAR) );
          if (!nt_dest)
          {
              status = STATUS_NO_MEMORY;
              goto cleanup;
          }
          status = wine_unix_to_nt_file_name( unix_dest, nt_dest, &nt_dest_len );
          if (status != STATUS_BUFFER_TOO_SMALL) break;
          free( nt_dest );
      }
      dest_allocated = TRUE;
      if (status != STATUS_SUCCESS)
          goto cleanup;
      nt_dest_len *= sizeof(WCHAR);
  
      /* remove the relative path from the NT path */
      if (flags == SYMLINK_FLAG_RELATIVE)
      {
          SIZE_T nt_path_len = PATH_MAX;
          int relative_offset;
          WCHAR *nt_path;
  
          unix_dest_len = path_len;
          for (;;)
          {
              nt_path = malloc( nt_path_len * sizeof(WCHAR) );
              if (!nt_path)
              {
                  status = STATUS_NO_MEMORY;
                  goto cleanup;
              }
              status = wine_unix_to_nt_file_name( unix_dest, nt_path, &nt_path_len );
              if (status != STATUS_BUFFER_TOO_SMALL) break;
              free( nt_path );
          }
          if (status != STATUS_SUCCESS)
              goto cleanup;
          relative_offset = lstrlenW( nt_path );
          if (wcsnicmp( nt_path, nt_dest, relative_offset ) != 0)
          {
              free( nt_path );
              status = STATUS_IO_REPARSE_DATA_INVALID;
              goto cleanup;
          }
          free( nt_path );
          nt_dest_len = lstrlenW( &nt_dest[relative_offset] ) * sizeof(WCHAR);
          memmove( nt_dest, &nt_dest[relative_offset], nt_dest_len + sizeof(WCHAR) );
      }
  
      prefix_len = (flags == SYMLINK_FLAG_RELATIVE) ? 0 : strlen("\\??\\");
      switch(buffer->ReparseTag)
      {
      case IO_REPARSE_TAG_MOUNT_POINT:
          max_length = out_size-FIELD_OFFSET(typeof(*buffer), MountPointReparseBuffer.PathBuffer[1]);
          buffer->MountPointReparseBuffer.SubstituteNameOffset = 0;
          buffer->MountPointReparseBuffer.SubstituteNameLength = nt_dest_len;
          subst_name = &buffer->MountPointReparseBuffer.PathBuffer[buffer->MountPointReparseBuffer.SubstituteNameOffset/sizeof(WCHAR)];
          buffer->MountPointReparseBuffer.PrintNameOffset = nt_dest_len + sizeof(WCHAR);
          buffer->MountPointReparseBuffer.PrintNameLength = nt_dest_len - prefix_len*sizeof(WCHAR);
          print_name = &buffer->MountPointReparseBuffer.PathBuffer[buffer->MountPointReparseBuffer.PrintNameOffset/sizeof(WCHAR)];
          break;
      case IO_REPARSE_TAG_SYMLINK:
          max_length = out_size-FIELD_OFFSET(typeof(*buffer), SymbolicLinkReparseBuffer.PathBuffer[1]);
          buffer->SymbolicLinkReparseBuffer.SubstituteNameOffset = 0;
          buffer->SymbolicLinkReparseBuffer.SubstituteNameLength = nt_dest_len;
          subst_name = &buffer->SymbolicLinkReparseBuffer.PathBuffer[buffer->SymbolicLinkReparseBuffer.SubstituteNameOffset/sizeof(WCHAR)];
          buffer->SymbolicLinkReparseBuffer.PrintNameOffset = nt_dest_len + sizeof(WCHAR);
          buffer->SymbolicLinkReparseBuffer.PrintNameLength = nt_dest_len - prefix_len*sizeof(WCHAR);
          print_name = &buffer->SymbolicLinkReparseBuffer.PathBuffer[buffer->SymbolicLinkReparseBuffer.PrintNameOffset/sizeof(WCHAR)];
          buffer->SymbolicLinkReparseBuffer.Flags = flags;
          break;
      default:
          /* unrecognized (regular) files should probably be treated as symlinks */
          WARN("unrecognized symbolic link\n");
          status = STATUS_NOT_IMPLEMENTED;
          goto cleanup;
      }
      if (nt_dest_len > max_length)
      {
          status = STATUS_BUFFER_TOO_SMALL;
          goto cleanup;
      }
  
      memcpy( subst_name, nt_dest, nt_dest_len );
      memcpy( print_name, &nt_dest[prefix_len], nt_dest_len - prefix_len*sizeof(WCHAR) );
      status = STATUS_SUCCESS;
  
  cleanup:
      if (dest_allocated) free( nt_dest );
      if (needs_close) close( dest_fd );
      return status;
  }
  
  
  /*
   * Retrieve the unix name corresponding to a file handle, remove that symlink, and then recreate
   * a directory at the location of the old filename.
   */
  NTSTATUS FILE_RemoveSymlink(HANDLE handle, REPARSE_GUID_DATA_BUFFER *buffer)
  {
      char tmpdir[PATH_MAX], tmpfile[PATH_MAX], *d;
      BOOL tempdir_created = FALSE;
      int dest_fd, needs_close;
      BOOL is_dir = TRUE;
      NTSTATUS status;
      char *unix_name;
      struct stat st;
  
      if ((status = server_get_unix_fd( handle, FILE_SPECIAL_ACCESS, &dest_fd, &needs_close, NULL, NULL )))
          return status;
  
      if ((status = server_get_unix_name( handle, &unix_name )))
          goto cleanup;
  
      TRACE( "Deleting symlink %s\n", unix_name );
  
      /* Produce the file/directory in a temporary location in the same folder */
      if (fstat( dest_fd, &st ) == -1)
      {
          status = errno_to_status( errno );
          goto cleanup;
      }
      is_dir = S_ISDIR(st.st_mode);
      strcpy( tmpdir, unix_name );
      d = dirname( tmpdir);
      if (d != tmpdir) strcpy( tmpdir, d );
      strcat( tmpdir, "/.winelink.XXXXXX" );
      if (mkdtemp( tmpdir ) == NULL)
      {
          status = errno_to_status( errno );
          goto cleanup;
      }
      tempdir_created = TRUE;
      strcpy( tmpfile, tmpdir );
      strcat( tmpfile, "/tmpfile" );
      if (is_dir && mkdir( tmpfile, st.st_mode ))
      {
          status = errno_to_status( errno );
          goto cleanup;
      }
      else if (!is_dir)
      {
          int fd = open( tmpfile, O_CREAT|O_WRONLY|O_TRUNC, st.st_mode );
          if (fd < 0)
              {
              status = errno_to_status( errno );
              goto cleanup;
          }
          close( fd );
      }
      /* attemp to retain the ownership (if possible) */
      lchown( tmpfile, st.st_uid, st.st_gid );
      /* Atomically move the directory into position */
      if (!renameat2( -1, tmpfile, -1, unix_name, RENAME_EXCHANGE ))
      {
          /* success: link and folder have switched locations */
          unlink( tmpfile ); /* remove the link (at folder location) */
      }
      else if (errno == ENOSYS)
      {
          FIXME( "Atomic exchange of directory with symbolic link unsupported on this system, "
                 "using unsafe exchange instead.\n" );
          if (unlink( unix_name ))
          {
              status = errno_to_status( errno );
              goto cleanup;
          }
          if (rename( tmpfile, unix_name ))
          {
              status = errno_to_status( errno );
              goto cleanup; /* not moved, orignal file/folder at destination is orphaned */
          }
      }
      else
      {
          status = errno_to_status( errno );
          goto cleanup;
      }
      status = STATUS_SUCCESS;
  
  cleanup:
      if (tempdir_created) rmdir( tmpdir );
      if (needs_close) close( dest_fd );
      return status;
  }
  
  
  /******************************************************************************
   *              NtFsControlFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtFsControlFile( HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc, void *apc_context,
                                   IO_STATUS_BLOCK *io, ULONG code, void *in_buffer, ULONG in_size,
                                   void *out_buffer, ULONG out_size )
  {
      NTSTATUS status;
  
      TRACE( "(%p,%p,%p,%p,%p,0x%08x,%p,0x%08x,%p,0x%08x)\n",
             handle, event, apc, apc_context, io, code, in_buffer, in_size, out_buffer, out_size );
  
      if (!io) return STATUS_INVALID_PARAMETER;
  
      ignore_server_ioctl_struct_holes( code, in_buffer, in_size );
  
      switch (code)
      {
      case FSCTL_DISMOUNT_VOLUME:
          status = server_ioctl_file( handle, event, apc, apc_context, io, code,
                                      in_buffer, in_size, out_buffer, out_size );
          if (!status) status = unmount_device( handle );
          return status;
  
      case FSCTL_PIPE_IMPERSONATE:
          FIXME("FSCTL_PIPE_IMPERSONATE: impersonating self\n");
          return server_ioctl_file( handle, event, apc, apc_context, io, code,
                                    in_buffer, in_size, out_buffer, out_size );
  
      case FSCTL_IS_VOLUME_MOUNTED:
      case FSCTL_LOCK_VOLUME:
      case FSCTL_UNLOCK_VOLUME:
          FIXME("stub! return success - Unsupported fsctl %x (device=%x access=%x func=%x method=%x)\n",
                code, code >> 16, (code >> 14) & 3, (code >> 2) & 0xfff, code & 3);
          status = STATUS_SUCCESS;
          break;
  
      case FSCTL_GET_RETRIEVAL_POINTERS:
      {
          RETRIEVAL_POINTERS_BUFFER *buffer = (RETRIEVAL_POINTERS_BUFFER *)out_buffer;
  
          FIXME("stub: FSCTL_GET_RETRIEVAL_POINTERS\n");
  
          if (out_size >= sizeof(RETRIEVAL_POINTERS_BUFFER))
          {
              buffer->ExtentCount                 = 1;
              buffer->StartingVcn.QuadPart        = 1;
              buffer->Extents[0].NextVcn.QuadPart = 0;
              buffer->Extents[0].Lcn.QuadPart     = 0;
              io->Information = sizeof(RETRIEVAL_POINTERS_BUFFER);
              status = STATUS_SUCCESS;
          }
          else
          {
              io->Information = 0;
              status = STATUS_BUFFER_TOO_SMALL;
          }
          break;
      }
  
      case FSCTL_GET_OBJECT_ID:
      {
          FILE_OBJECTID_BUFFER *info = out_buffer;
          int fd, needs_close;
          struct stat st;
  
          io->Information = 0;
          if (out_size >= sizeof(*info))
          {
              status = server_get_unix_fd( handle, 0, &fd, &needs_close, NULL, NULL );
              if (status) break;
              fstat( fd, &st );
              if (needs_close) close( fd );
              memset( info, 0, sizeof(*info) );
              memcpy( info->ObjectId, &st.st_dev, sizeof(st.st_dev) );
              memcpy( info->ObjectId + 8, &st.st_ino, sizeof(st.st_ino) );
              io->Information = sizeof(*info);
          }
          else status = STATUS_BUFFER_TOO_SMALL;
          break;
      }
  
      case FSCTL_DELETE_REPARSE_POINT:
      {
          REPARSE_GUID_DATA_BUFFER *buffer = (REPARSE_GUID_DATA_BUFFER *)in_buffer;
  
          switch(buffer->ReparseTag)
          {
          case IO_REPARSE_TAG_MOUNT_POINT:
          case IO_REPARSE_TAG_SYMLINK:
              status = FILE_RemoveSymlink( handle, buffer );
              break;
          default:
              FIXME("stub: FSCTL_DELETE_REPARSE_POINT(%x)\n", buffer->ReparseTag);
              status = STATUS_NOT_IMPLEMENTED;
              break;
          }
          break;
      }
      case FSCTL_GET_REPARSE_POINT:
      {
          REPARSE_DATA_BUFFER *buffer = (REPARSE_DATA_BUFFER *)out_buffer;
          status = FILE_GetSymlink( handle, buffer, out_size );
          break;
      }
      case FSCTL_SET_REPARSE_POINT:
      {
          REPARSE_DATA_BUFFER *buffer = (REPARSE_DATA_BUFFER *)in_buffer;
  
          switch(buffer->ReparseTag)
          {
          case IO_REPARSE_TAG_MOUNT_POINT:
          case IO_REPARSE_TAG_SYMLINK:
              status = FILE_CreateSymlink( handle, buffer );
              break;
          default:
              FIXME("stub: FSCTL_SET_REPARSE_POINT(%x)\n", buffer->ReparseTag);
              status = STATUS_NOT_IMPLEMENTED;
              break;
          }
          break;
      }
  
      case FSCTL_SET_SPARSE:
          TRACE("FSCTL_SET_SPARSE: Ignoring request\n");
          io->Information = 0;
          status = STATUS_SUCCESS;
          break;
      default:
          return server_ioctl_file( handle, event, apc, apc_context, io, code,
                                    in_buffer, in_size, out_buffer, out_size );
      }
  
      if (status != STATUS_PENDING) io->u.Status = status;
      return status;
  }
  
  
  /******************************************************************************
   *              NtFlushBuffersFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtFlushBuffersFile( HANDLE handle, IO_STATUS_BLOCK *io )
  {
      NTSTATUS ret;
      HANDLE wait_handle;
      enum server_fd_type type;
      int fd, needs_close;
  
      if (!io || !virtual_check_buffer_for_write( io, sizeof(*io) )) return STATUS_ACCESS_VIOLATION;
  
      ret = server_get_unix_fd( handle, FILE_WRITE_DATA, &fd, &needs_close, &type, NULL );
      if (ret == STATUS_ACCESS_DENIED)
          ret = server_get_unix_fd( handle, FILE_APPEND_DATA, &fd, &needs_close, &type, NULL );
  
      if (!ret && (type == FD_TYPE_FILE || type == FD_TYPE_DIR || type == FD_TYPE_CHAR))
      {
          if (fsync(fd)) ret = errno_to_status( errno );
          io->u.Status    = ret;
          io->Information = 0;
      }
      else if (!ret && type == FD_TYPE_SERIAL)
      {
          ret = serial_FlushBuffersFile( fd );
      }
      else if (ret != STATUS_ACCESS_DENIED)
      {
          struct async_irp *async;
  
          if (!(async = (struct async_irp *)alloc_fileio( sizeof(*async), irp_completion, handle )))
              return STATUS_NO_MEMORY;
          async->buffer  = NULL;
          async->size    = 0;
  
          SERVER_START_REQ( flush )
          {
              req->async = server_async( handle, &async->io, NULL, NULL, NULL, io );
              ret = wine_server_call( req );
              wait_handle = wine_server_ptr_handle( reply->event );
              if (wait_handle && ret != STATUS_PENDING)
              {
                  io->u.Status    = ret;
                  io->Information = 0;
              }
          }
          SERVER_END_REQ;
  
          if (ret != STATUS_PENDING) free( async );
  
          if (wait_handle) ret = wait_async( wait_handle, FALSE, io );
      }
  
      if (needs_close) close( fd );
      return ret;
  }
  
  
  /**************************************************************************
   *           NtCancelIoFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtCancelIoFile( HANDLE handle, IO_STATUS_BLOCK *io_status )
  {
      TRACE( "%p %p\n", handle, io_status );
  
      SERVER_START_REQ( cancel_async )
      {
          req->handle      = wine_server_obj_handle( handle );
          req->only_thread = TRUE;
          io_status->u.Status = wine_server_call( req );
      }
      SERVER_END_REQ;
      return io_status->u.Status;
  }
  
  
  /**************************************************************************
   *           NtCancelIoFileEx   (NTDLL.@)
   */
  NTSTATUS WINAPI NtCancelIoFileEx( HANDLE handle, IO_STATUS_BLOCK *io, IO_STATUS_BLOCK *io_status )
  {
      TRACE( "%p %p %p\n", handle, io, io_status );
  
      SERVER_START_REQ( cancel_async )
      {
          req->handle = wine_server_obj_handle( handle );
          req->iosb   = wine_server_client_ptr( io );
          io_status->u.Status = wine_server_call( req );
      }
      SERVER_END_REQ;
      return io_status->u.Status;
  }
  
  
  /******************************************************************
   *           NtLockFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtLockFile( HANDLE file, HANDLE event, PIO_APC_ROUTINE apc, void* apc_user,
                              IO_STATUS_BLOCK *io_status, LARGE_INTEGER *offset,
                              LARGE_INTEGER *count, ULONG *key, BOOLEAN dont_wait, BOOLEAN exclusive )
  {
      static int warn;
      NTSTATUS ret;
      HANDLE handle;
      BOOLEAN async;
  
      if (apc || io_status || key)
      {
          FIXME("Unimplemented yet parameter\n");
          return STATUS_NOT_IMPLEMENTED;
      }
      if (apc_user && !warn++) FIXME("I/O completion on lock not implemented yet\n");
  
      for (;;)
      {
          SERVER_START_REQ( lock_file )
          {
              req->handle      = wine_server_obj_handle( file );
              req->offset      = offset->QuadPart;
              req->count       = count->QuadPart;
              req->shared      = !exclusive;
              req->wait        = !dont_wait;
              ret = wine_server_call( req );
              handle = wine_server_ptr_handle( reply->handle );
              async  = reply->overlapped;
          }
          SERVER_END_REQ;
          if (ret != STATUS_PENDING)
          {
              if (!ret && event) NtSetEvent( event, NULL );
              return ret;
          }
          if (async)
          {
              FIXME( "Async I/O lock wait not implemented, might deadlock\n" );
              if (handle) NtClose( handle );
              return STATUS_PENDING;
          }
          if (handle)
          {
              NtWaitForSingleObject( handle, FALSE, NULL );
              NtClose( handle );
          }
          else  /* Unix lock conflict, sleep a bit and retry */
          {
              LARGE_INTEGER time;
              time.QuadPart = -100 * (ULONGLONG)10000;
              NtDelayExecution( FALSE, &time );
          }
      }
  }
  
  
  /******************************************************************
   *           NtUnlockFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtUnlockFile( HANDLE handle, IO_STATUS_BLOCK *io_status, LARGE_INTEGER *offset,
                                LARGE_INTEGER *count, ULONG *key )
  {
      NTSTATUS status;
  
      TRACE( "%p %x%08x %x%08x\n",
             handle, offset->u.HighPart, offset->u.LowPart, count->u.HighPart, count->u.LowPart );
  
      if (io_status || key)
      {
          FIXME("Unimplemented yet parameter\n");
          return STATUS_NOT_IMPLEMENTED;
      }
  
      SERVER_START_REQ( unlock_file )
      {
          req->handle = wine_server_obj_handle( handle );
          req->offset = offset->QuadPart;
          req->count  = count->QuadPart;
          status = wine_server_call( req );
      }
      SERVER_END_REQ;
      return status;
  }
  
  
  static NTSTATUS read_changes_apc( void *user, IO_STATUS_BLOCK *iosb, NTSTATUS status )
  {
      struct async_fileio_read_changes *fileio = user;
      int size = 0;
  
      if (status == STATUS_ALERTED)
      {
          SERVER_START_REQ( read_change )
          {
              req->handle = wine_server_obj_handle( fileio->io.handle );
              wine_server_set_reply( req, fileio->data, fileio->data_size );
              status = wine_server_call( req );
              size = wine_server_reply_size( reply );
          }
          SERVER_END_REQ;
  
          if (status == STATUS_SUCCESS && fileio->buffer)
          {
              FILE_NOTIFY_INFORMATION *pfni = fileio->buffer;
              int i, left = fileio->buffer_size;
              DWORD *last_entry_offset = NULL;
              struct filesystem_event *event = (struct filesystem_event*)fileio->data;
  
              while (size && left >= sizeof(*pfni))
              {
                  DWORD len = (left - offsetof(FILE_NOTIFY_INFORMATION, FileName)) / sizeof(WCHAR);
  
                  /* convert to an NT style path */
                  for (i = 0; i < event->len; i++)
                      if (event->name[i] == '/') event->name[i] = '\\';
  
                  pfni->Action = event->action;
                  pfni->FileNameLength = ntdll_umbstowcs( event->name, event->len, pfni->FileName, len );
                  last_entry_offset = &pfni->NextEntryOffset;
  
                  if (pfni->FileNameLength == len) break;
  
                  i = offsetof(FILE_NOTIFY_INFORMATION, FileName[pfni->FileNameLength]);
                  pfni->FileNameLength *= sizeof(WCHAR);
                  pfni->NextEntryOffset = i;
                  pfni = (FILE_NOTIFY_INFORMATION*)((char*)pfni + i);
                  left -= i;
  
                  i = (offsetof(struct filesystem_event, name[event->len])
                       + sizeof(int)-1) / sizeof(int) * sizeof(int);
                  event = (struct filesystem_event*)((char*)event + i);
                  size -= i;
              }
  
              if (size)
              {
                  status = STATUS_NOTIFY_ENUM_DIR;
                  size = 0;
              }
              else
              {
                  if (last_entry_offset) *last_entry_offset = 0;
                  size = fileio->buffer_size - left;
              }
          }
          else
          {
              status = STATUS_NOTIFY_ENUM_DIR;
              size = 0;
          }
      }
  
      if (status != STATUS_PENDING)
      {
          iosb->u.Status = status;
          iosb->Information = size;
          release_fileio( &fileio->io );
      }
      return status;
  }
  
  #define FILE_NOTIFY_ALL        (  \
   FILE_NOTIFY_CHANGE_FILE_NAME   | \
   FILE_NOTIFY_CHANGE_DIR_NAME    | \
   FILE_NOTIFY_CHANGE_ATTRIBUTES  | \
   FILE_NOTIFY_CHANGE_SIZE        | \
   FILE_NOTIFY_CHANGE_LAST_WRITE  | \
   FILE_NOTIFY_CHANGE_LAST_ACCESS | \
   FILE_NOTIFY_CHANGE_CREATION    | \
   FILE_NOTIFY_CHANGE_SECURITY   )
  
  /******************************************************************************
   *              NtNotifyChangeDirectoryFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtNotifyChangeDirectoryFile( HANDLE handle, HANDLE event, PIO_APC_ROUTINE apc,
                                               void *apc_context, IO_STATUS_BLOCK *iosb, void *buffer,
                                               ULONG buffer_size, ULONG filter, BOOLEAN subtree )
  {
      struct async_fileio_read_changes *fileio;
      NTSTATUS status;
      ULONG size = max( 4096, buffer_size );
  
      TRACE( "%p %p %p %p %p %p %u %u %d\n",
             handle, event, apc, apc_context, iosb, buffer, buffer_size, filter, subtree );
  
      if (!iosb) return STATUS_ACCESS_VIOLATION;
      if (filter == 0 || (filter & ~FILE_NOTIFY_ALL)) return STATUS_INVALID_PARAMETER;
  
      fileio = (struct async_fileio_read_changes *)alloc_fileio(
          offsetof(struct async_fileio_read_changes, data[size]), read_changes_apc, handle );
      if (!fileio) return STATUS_NO_MEMORY;
  
      fileio->buffer      = buffer;
      fileio->buffer_size = buffer_size;
      fileio->data_size   = size;
  
      SERVER_START_REQ( read_directory_changes )
      {
          req->filter    = filter;
          req->want_data = (buffer != NULL);
          req->subtree   = subtree;
          req->async     = server_async( handle, &fileio->io, event, apc, apc_context, iosb );
          status = wine_server_call( req );
      }
      SERVER_END_REQ;
  
      if (status != STATUS_PENDING) free( fileio );
      return status;
  }
  
  
  #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
  /* helper for FILE_GetDeviceInfo to hide some platform differences in fstatfs */
  static inline void get_device_info_fstatfs( FILE_FS_DEVICE_INFORMATION *info, const char *fstypename,
                                              unsigned int flags )
  {
      if (!strcmp("cd9660", fstypename) || !strcmp("udf", fstypename))
      {
          info->DeviceType = FILE_DEVICE_CD_ROM_FILE_SYSTEM;
          /* Don't assume read-only, let the mount options set it below */
          info->Characteristics |= FILE_REMOVABLE_MEDIA;
      }
      else if (!strcmp("nfs", fstypename) || !strcmp("nwfs", fstypename) ||
               !strcmp("smbfs", fstypename) || !strcmp("afpfs", fstypename))
      {
          info->DeviceType = FILE_DEVICE_NETWORK_FILE_SYSTEM;
          info->Characteristics |= FILE_REMOTE_DEVICE;
      }
      else if (!strcmp("procfs", fstypename))
          info->DeviceType = FILE_DEVICE_VIRTUAL_DISK;
      else
          info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
  
      if (flags & MNT_RDONLY)
          info->Characteristics |= FILE_READ_ONLY_DEVICE;
  
      if (!(flags & MNT_LOCAL))
      {
          info->DeviceType = FILE_DEVICE_NETWORK_FILE_SYSTEM;
          info->Characteristics |= FILE_REMOTE_DEVICE;
      }
  }
  #endif
  
  static inline BOOL is_device_placeholder( int fd )
  {
      static const char wine_placeholder[] = "Wine device placeholder";
      char buffer[sizeof(wine_placeholder)-1];
  
      if (pread( fd, buffer, sizeof(wine_placeholder) - 1, 0 ) != sizeof(wine_placeholder) - 1)
          return FALSE;
      return !memcmp( buffer, wine_placeholder, sizeof(wine_placeholder) - 1 );
  }
  
  static NTSTATUS get_device_info( int fd, FILE_FS_DEVICE_INFORMATION *info )
  {
      struct stat st;
  
      info->Characteristics = 0;
      if (fstat( fd, &st ) < 0) return errno_to_status( errno );
      if (S_ISCHR( st.st_mode ))
      {
          info->DeviceType = FILE_DEVICE_UNKNOWN;
  #ifdef linux
          switch(major(st.st_rdev))
          {
          case MEM_MAJOR:
              info->DeviceType = FILE_DEVICE_NULL;
              break;
          case TTY_MAJOR:
              info->DeviceType = FILE_DEVICE_SERIAL_PORT;
              break;
          case LP_MAJOR:
              info->DeviceType = FILE_DEVICE_PARALLEL_PORT;
              break;
          case SCSI_TAPE_MAJOR:
              info->DeviceType = FILE_DEVICE_TAPE;
              break;
          }
  #endif
      }
      else if (S_ISBLK( st.st_mode ))
      {
          info->DeviceType = FILE_DEVICE_DISK;
      }
      else if (S_ISFIFO( st.st_mode ) || S_ISSOCK( st.st_mode ))
      {
          info->DeviceType = FILE_DEVICE_NAMED_PIPE;
      }
      else if (is_device_placeholder( fd ))
      {
          info->DeviceType = FILE_DEVICE_DISK;
      }
      else  /* regular file or directory */
      {
  #if defined(linux) && defined(HAVE_FSTATFS)
          struct statfs stfs;
  
          /* check for floppy disk */
          if (major(st.st_dev) == FLOPPY_MAJOR)
              info->Characteristics |= FILE_REMOVABLE_MEDIA;
  
          if (fstatfs( fd, &stfs ) < 0) stfs.f_type = 0;
          switch (stfs.f_type)
          {
          case 0x9660:      /* iso9660 */
          case 0x9fa1:      /* supermount */
          case 0x15013346:  /* udf */
              info->DeviceType = FILE_DEVICE_CD_ROM_FILE_SYSTEM;
              info->Characteristics |= FILE_REMOVABLE_MEDIA|FILE_READ_ONLY_DEVICE;
              break;
          case 0x6969:  /* nfs */
          case 0xff534d42: /* cifs */
          case 0xfe534d42: /* smb2 */
          case 0x517b:  /* smbfs */
          case 0x564c:  /* ncpfs */
              info->DeviceType = FILE_DEVICE_NETWORK_FILE_SYSTEM;
              info->Characteristics |= FILE_REMOTE_DEVICE;
              break;
          case 0x1373:      /* devfs */
          case 0x9fa0:      /* procfs */
              info->DeviceType = FILE_DEVICE_VIRTUAL_DISK;
              break;
          case 0x01021994:  /* tmpfs */
          case 0x28cd3d45:  /* cramfs */
              /* Don't map these to FILE_DEVICE_VIRTUAL_DISK by default. Virtual
               * filesystems are rare on Windows, and some programs refuse to
               * recognize them as valid. */
          default:
              info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
              break;
          }
  #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
          struct statfs stfs;
  
          if (fstatfs( fd, &stfs ) < 0)
              info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
          else
              get_device_info_fstatfs( info, stfs.f_fstypename, stfs.f_flags );
  #elif defined(__NetBSD__)
          struct statvfs stfs;
  
          if (fstatvfs( fd, &stfs) < 0)
              info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
          else
              get_device_info_fstatfs( info, stfs.f_fstypename, stfs.f_flag );
  #elif defined(sun)
          /* Use dkio to work out device types */
          {
  # include <sys/dkio.h>
  # include <sys/vtoc.h>
              struct dk_cinfo dkinf;
              int retval = ioctl(fd, DKIOCINFO, &dkinf);
              if(retval==-1){
                  WARN("Unable to get disk device type information - assuming a disk like device\n");
                  info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
              }
              switch (dkinf.dki_ctype)
              {
              case DKC_CDROM:
                  info->DeviceType = FILE_DEVICE_CD_ROM_FILE_SYSTEM;
                  info->Characteristics |= FILE_REMOVABLE_MEDIA|FILE_READ_ONLY_DEVICE;
                  break;
              case DKC_NCRFLOPPY:
              case DKC_SMSFLOPPY:
              case DKC_INTEL82072:
              case DKC_INTEL82077:
                  info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
                  info->Characteristics |= FILE_REMOVABLE_MEDIA;
                  break;
              case DKC_MD:
              /* Don't map these to FILE_DEVICE_VIRTUAL_DISK by default. Virtual
               * filesystems are rare on Windows, and some programs refuse to
               * recognize them as valid. */
              default:
                  info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
              }
          }
  #else
          static int warned;
          if (!warned++) FIXME( "device info not properly supported on this platform\n" );
          info->DeviceType = FILE_DEVICE_DISK_FILE_SYSTEM;
  #endif
          info->Characteristics |= FILE_DEVICE_IS_MOUNTED;
      }
      return STATUS_SUCCESS;
  }
  
  
  /******************************************************************************
   *              NtQueryVolumeInformationFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtQueryVolumeInformationFile( HANDLE handle, IO_STATUS_BLOCK *io,
                                                void *buffer, ULONG length,
                                                FS_INFORMATION_CLASS info_class )
  {
      int fd, needs_close;
      struct stat st;
  
      io->u.Status = server_get_unix_fd( handle, 0, &fd, &needs_close, NULL, NULL );
      if (io->u.Status == STATUS_BAD_DEVICE_TYPE)
      {
          SERVER_START_REQ( get_volume_info )
          {
              req->handle = wine_server_obj_handle( handle );
              req->info_class = info_class;
              wine_server_set_reply( req, buffer, length );
              io->u.Status = wine_server_call( req );
              if (!io->u.Status) io->Information = wine_server_reply_size( reply );
          }
          SERVER_END_REQ;
          return io->u.Status;
      }
      else if (io->u.Status) return io->u.Status;
  
      io->u.Status = STATUS_NOT_IMPLEMENTED;
      io->Information = 0;
  
      switch( info_class )
      {
      case FileFsLabelInformation:
          FIXME( "%p: label info not supported\n", handle );
          break;
  
      case FileFsSizeInformation:
          if (length < sizeof(FILE_FS_SIZE_INFORMATION))
              io->u.Status = STATUS_BUFFER_TOO_SMALL;
          else
          {
              FILE_FS_SIZE_INFORMATION *info = buffer;
  
              if (fstat( fd, &st ) < 0)
              {
                  io->u.Status = errno_to_status( errno );
                  break;
              }
              if (!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode))
              {
                  io->u.Status = STATUS_INVALID_DEVICE_REQUEST;
              }
              else
              {
                  ULONGLONG bsize;
                  /* Linux's fstatvfs is buggy */
  #if !defined(linux) || !defined(HAVE_FSTATFS)
                  struct statvfs stfs;
  
                  if (fstatvfs( fd, &stfs ) < 0)
                  {
                      io->u.Status = errno_to_status( errno );
                      break;
                  }
                  bsize = stfs.f_frsize;
  #else
                  struct statfs stfs;
                  if (fstatfs( fd, &stfs ) < 0)
                  {
                      io->u.Status = errno_to_status( errno );
                      break;
                  }
                  bsize = stfs.f_bsize;
  #endif
                  if (bsize == 2048)  /* assume CD-ROM */
                  {
                      info->BytesPerSector = 2048;
                      info->SectorsPerAllocationUnit = 1;
                  }
                  else
                  {
                      info->BytesPerSector = 512;
                      info->SectorsPerAllocationUnit = 8;
                  }
                  info->TotalAllocationUnits.QuadPart = bsize * stfs.f_blocks / (info->BytesPerSector * info->SectorsPerAllocationUnit);
                  info->AvailableAllocationUnits.QuadPart = bsize * stfs.f_bavail / (info->BytesPerSector * info->SectorsPerAllocationUnit);
                  io->Information = sizeof(*info);
                  io->u.Status = STATUS_SUCCESS;
              }
          }
          break;
  
      case FileFsDeviceInformation:
          if (length < sizeof(FILE_FS_DEVICE_INFORMATION))
              io->u.Status = STATUS_BUFFER_TOO_SMALL;
          else
          {
              FILE_FS_DEVICE_INFORMATION *info = buffer;
  
              if ((io->u.Status = get_device_info( fd, info )) == STATUS_SUCCESS)
                  io->Information = sizeof(*info);
          }
          break;
  
      case FileFsAttributeInformation:
      {
          static const WCHAR fatW[] = {'F','A','T'};
          static const WCHAR fat32W[] = {'F','A','T','3','2'};
          static const WCHAR ntfsW[] = {'N','T','F','S'};
          static const WCHAR cdfsW[] = {'C','D','F','S'};
          static const WCHAR udfW[] = {'U','D','F'};
  
          FILE_FS_ATTRIBUTE_INFORMATION *info = buffer;
          struct mountmgr_unix_drive drive;
          enum mountmgr_fs_type fs_type = MOUNTMGR_FS_TYPE_NTFS;
  
          if (length < sizeof(FILE_FS_ATTRIBUTE_INFORMATION))
          {
              io->u.Status = STATUS_INFO_LENGTH_MISMATCH;
              break;
          }
  
          if (!get_mountmgr_fs_info( handle, fd, &drive, sizeof(drive) )) fs_type = drive.fs_type;
          else
          {
              struct statfs stfs;
  
              if (!fstatfs( fd, &stfs ))
              {
  #if defined(linux) && defined(HAVE_FSTATFS)
                  switch (stfs.f_type)
                  {
                  case 0x9660:
                      fs_type = MOUNTMGR_FS_TYPE_ISO9660;
                      break;
                  case 0x15013346:
                      fs_type = MOUNTMGR_FS_TYPE_UDF;
                      break;
                  case 0x4d44:
                      fs_type = MOUNTMGR_FS_TYPE_FAT32;
                      break;
                  }
  #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
                  if (!strcmp( stfs.f_fstypename, "cd9660" ))
                      fs_type = MOUNTMGR_FS_TYPE_ISO9660;
                  else if (!strcmp( stfs.f_fstypename, "udf" ))
                      fs_type = MOUNTMGR_FS_TYPE_UDF;
                  else if (!strcmp( stfs.f_fstypename, "msdos" ))
                      fs_type = MOUNTMGR_FS_TYPE_FAT32;
  #endif
              }
          }
  
          switch (fs_type)
          {
          case MOUNTMGR_FS_TYPE_ISO9660:
              info->FileSystemAttributes = FILE_READ_ONLY_VOLUME;
              info->MaximumComponentNameLength = 221;
              info->FileSystemNameLength = min( sizeof(cdfsW), length - offsetof( FILE_FS_ATTRIBUTE_INFORMATION, FileSystemName ) );
              memcpy(info->FileSystemName, cdfsW, info->FileSystemNameLength);
              break;
          case MOUNTMGR_FS_TYPE_UDF:
              info->FileSystemAttributes = FILE_READ_ONLY_VOLUME | FILE_UNICODE_ON_DISK | FILE_CASE_SENSITIVE_SEARCH;
              info->MaximumComponentNameLength = 255;
              info->FileSystemNameLength = min( sizeof(udfW), length - offsetof( FILE_FS_ATTRIBUTE_INFORMATION, FileSystemName ) );
              memcpy(info->FileSystemName, udfW, info->FileSystemNameLength);
              break;
          case MOUNTMGR_FS_TYPE_FAT:
              info->FileSystemAttributes = FILE_CASE_PRESERVED_NAMES; /* FIXME */
              info->MaximumComponentNameLength = 255;
              info->FileSystemNameLength = min( sizeof(fatW), length - offsetof( FILE_FS_ATTRIBUTE_INFORMATION, FileSystemName ) );
              memcpy(info->FileSystemName, fatW, info->FileSystemNameLength);
              break;
          case MOUNTMGR_FS_TYPE_FAT32:
              info->FileSystemAttributes = FILE_CASE_PRESERVED_NAMES; /* FIXME */
              info->MaximumComponentNameLength = 255;
              info->FileSystemNameLength = min( sizeof(fat32W), length - offsetof( FILE_FS_ATTRIBUTE_INFORMATION, FileSystemName ) );
              memcpy(info->FileSystemName, fat32W, info->FileSystemNameLength);
              break;
          default:
              info->FileSystemAttributes = FILE_CASE_PRESERVED_NAMES | FILE_PERSISTENT_ACLS;
              info->MaximumComponentNameLength = 255;
              info->FileSystemNameLength = min( sizeof(ntfsW), length - offsetof( FILE_FS_ATTRIBUTE_INFORMATION, FileSystemName ) );
              memcpy(info->FileSystemName, ntfsW, info->FileSystemNameLength);
              break;
          }
  
          io->Information = offsetof( FILE_FS_ATTRIBUTE_INFORMATION, FileSystemName ) + info->FileSystemNameLength;
          io->u.Status = STATUS_SUCCESS;
          break;
      }
  
      case FileFsVolumeInformation:
      {
          FILE_FS_VOLUME_INFORMATION *info = buffer;
          ULONGLONG data[64];
          struct mountmgr_unix_drive *drive = (struct mountmgr_unix_drive *)data;
          const WCHAR *label;
  
          if (length < sizeof(FILE_FS_VOLUME_INFORMATION))
          {
              io->u.Status = STATUS_INFO_LENGTH_MISMATCH;
              break;
          }
  
          if (get_mountmgr_fs_info( handle, fd, drive, sizeof(data) ))
          {
              io->u.Status = STATUS_NOT_IMPLEMENTED;
              break;
          }
  
          label = (WCHAR *)((char *)drive + drive->label_offset);
          info->VolumeCreationTime.QuadPart = 0; /* FIXME */
          info->VolumeSerialNumber = drive->serial;
          info->VolumeLabelLength = min( wcslen( label ) * sizeof(WCHAR),
                                         length - offsetof( FILE_FS_VOLUME_INFORMATION, VolumeLabel ) );
          info->SupportsObjects = (drive->fs_type == MOUNTMGR_FS_TYPE_NTFS);
          memcpy( info->VolumeLabel, label, info->VolumeLabelLength );
          io->Information = offsetof( FILE_FS_VOLUME_INFORMATION, VolumeLabel ) + info->VolumeLabelLength;
          io->u.Status = STATUS_SUCCESS;
          break;
      }
  
      case FileFsControlInformation:
          FIXME( "%p: control info not supported\n", handle );
          break;
  
      case FileFsFullSizeInformation:
          FIXME( "%p: full size info not supported\n", handle );
          break;
  
      case FileFsObjectIdInformation:
          FIXME( "%p: object id info not supported\n", handle );
          break;
  
      case FileFsMaximumInformation:
          FIXME( "%p: maximum info not supported\n", handle );
          break;
  
      default:
          io->u.Status = STATUS_INVALID_PARAMETER;
          break;
      }
      if (needs_close) close( fd );
      return io->u.Status;
  }
  
  
  /******************************************************************************
   *              NtSetVolumeInformationFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtSetVolumeInformationFile( HANDLE handle, IO_STATUS_BLOCK *io, void *info,
                                              ULONG length, FS_INFORMATION_CLASS class )
  {
      FIXME( "(%p,%p,%p,0x%08x,0x%08x) stub\n", handle, io, info, length, class );
      return STATUS_SUCCESS;
  }
  
  
  /******************************************************************
   *           NtQueryEaFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtQueryEaFile( HANDLE handle, IO_STATUS_BLOCK *io, void *buffer, ULONG length,
                                 BOOLEAN single_entry, void *list, ULONG list_len,
                                 ULONG *index, BOOLEAN restart )
  {
      FIXME( "(%p,%p,%p,%d,%d,%p,%d,%p,%d) stub\n",
             handle, io, buffer, length, single_entry, list, list_len, index, restart );
      return STATUS_ACCESS_DENIED;
  }
  
  
  /******************************************************************
   *           NtSetEaFile   (NTDLL.@)
   */
  NTSTATUS WINAPI NtSetEaFile( HANDLE handle, IO_STATUS_BLOCK *io, void *buffer, ULONG length )
  {
      FIXME( "(%p,%p,%p,%d) stub\n", handle, io, buffer, length );
      return STATUS_ACCESS_DENIED;
  }
  
  
  /**************************************************************************
   *           NtQueryObject   (NTDLL.@)
   */
  NTSTATUS WINAPI NtQueryObject( HANDLE handle, OBJECT_INFORMATION_CLASS info_class,
                                 void *ptr, ULONG len, ULONG *used_len )
  {
      NTSTATUS status;
  
      TRACE("(%p,0x%08x,%p,0x%08x,%p)\n", handle, info_class, ptr, len, used_len);
  
      if (used_len) *used_len = 0;
  
      switch (info_class)
      {
      case ObjectBasicInformation:
      {
          OBJECT_BASIC_INFORMATION *p = ptr;
  
          if (len < sizeof(*p)) return STATUS_INVALID_BUFFER_SIZE;
  
          SERVER_START_REQ( get_object_info )
          {
              req->handle = wine_server_obj_handle( handle );
              status = wine_server_call( req );
              if (status == STATUS_SUCCESS)
              {
                  memset( p, 0, sizeof(*p) );
                  p->GrantedAccess = reply->access;
                  p->PointerCount = reply->ref_count;
                  p->HandleCount = reply->handle_count;
                  if (used_len) *used_len = sizeof(*p);
              }
          }
          SERVER_END_REQ;
          break;
      }
  
      case ObjectNameInformation:
      {
          OBJECT_NAME_INFORMATION *p = ptr;
          char *unix_name;
          WCHAR *nt_name;
  
          /* first try as a file object */
  
          if (!(status = server_get_unix_name( handle, &unix_name )))
          {
              if (!(status = unix_to_nt_file_name( unix_name, &nt_name )))
              {
                  ULONG size = (wcslen(nt_name) + 1) * sizeof(WCHAR);
                  if (len < sizeof(*p)) status = STATUS_INFO_LENGTH_MISMATCH;
                  else if (len < sizeof(*p) + size) status = STATUS_BUFFER_OVERFLOW;
                  else
                  {
                      p->Name.Buffer = (WCHAR *)(p + 1);
                      p->Name.Length = size - sizeof(WCHAR);
                      p->Name.MaximumLength = size;
                      wcscpy( p->Name.Buffer, nt_name );
                  }
                  if (used_len) *used_len = sizeof(*p) + size;
                  free( nt_name );
              }
              free( unix_name );
              break;
          }
          else if (status != STATUS_OBJECT_TYPE_MISMATCH) break;
  
          /* not a file, treat as a generic object */
  
          SERVER_START_REQ( get_object_info )
          {
              req->handle = wine_server_obj_handle( handle );
              if (len > sizeof(*p)) wine_server_set_reply( req, p + 1, len - sizeof(*p) );
              status = wine_server_call( req );
              if (status == STATUS_SUCCESS)
              {
                  if (!reply->total)  /* no name */
                  {
                      if (sizeof(*p) > len) status = STATUS_INFO_LENGTH_MISMATCH;
                      else memset( p, 0, sizeof(*p) );
                      if (used_len) *used_len = sizeof(*p);
                  }
                  else if (sizeof(*p) + reply->total + sizeof(WCHAR) > len)
                  {
                      if (used_len) *used_len = sizeof(*p) + reply->total + sizeof(WCHAR);
                      status = STATUS_INFO_LENGTH_MISMATCH;
                  }
                  else
                  {
                      ULONG res = wine_server_reply_size( reply );
                      p->Name.Buffer = (WCHAR *)(p + 1);
                      p->Name.Length = res;
                      p->Name.MaximumLength = res + sizeof(WCHAR);
                      p->Name.Buffer[res / sizeof(WCHAR)] = 0;
                      if (used_len) *used_len = sizeof(*p) + p->Name.MaximumLength;
                  }
              }
          }
          SERVER_END_REQ;
          break;
      }
  
      case ObjectTypeInformation:
      {
          OBJECT_TYPE_INFORMATION *p = ptr;
  
          SERVER_START_REQ( get_object_type )
          {
              req->handle = wine_server_obj_handle( handle );
              if (len > sizeof(*p)) wine_server_set_reply( req, p + 1, len - sizeof(*p) );
              status = wine_server_call( req );
              if (status == STATUS_SUCCESS)
              {
                  if (!reply->total)  /* no name */
                  {
                      if (sizeof(*p) > len) status = STATUS_INFO_LENGTH_MISMATCH;
                      else memset( p, 0, sizeof(*p) );
                      if (used_len) *used_len = sizeof(*p);
                  }
                  else if (sizeof(*p) + reply->total + sizeof(WCHAR) > len)
                  {
                      if (used_len) *used_len = sizeof(*p) + reply->total + sizeof(WCHAR);
                      status = STATUS_INFO_LENGTH_MISMATCH;
                  }
                  else
                  {
                      ULONG res = wine_server_reply_size( reply );
                      p->TypeName.Buffer = (WCHAR *)(p + 1);
                      p->TypeName.Length = res;
                      p->TypeName.MaximumLength = res + sizeof(WCHAR);
                      p->TypeName.Buffer[res / sizeof(WCHAR)] = 0;
                      if (used_len) *used_len = sizeof(*p) + p->TypeName.MaximumLength;
                  }
              }
          }
          SERVER_END_REQ;
          break;
      }
  
      case ObjectDataInformation:
      {
          OBJECT_DATA_INFORMATION* p = ptr;
  
          if (len < sizeof(*p)) return STATUS_INVALID_BUFFER_SIZE;
  
          SERVER_START_REQ( set_handle_info )
          {
              req->handle = wine_server_obj_handle( handle );
              req->flags  = 0;
              req->mask   = 0;
              status = wine_server_call( req );
              if (status == STATUS_SUCCESS)
              {
                  p->InheritHandle = (reply->old_flags & HANDLE_FLAG_INHERIT) != 0;
                  p->ProtectFromClose = (reply->old_flags & HANDLE_FLAG_PROTECT_FROM_CLOSE) != 0;
                  if (used_len) *used_len = sizeof(*p);
              }
          }
          SERVER_END_REQ;
          break;
      }
  
      default:
          FIXME("Unsupported information class %u\n", info_class);
          status = STATUS_NOT_IMPLEMENTED;
          break;
      }
      return status;
  }
  
  
  /**************************************************************************
   *           NtSetInformationObject   (NTDLL.@)
   */
  NTSTATUS WINAPI NtSetInformationObject( HANDLE handle, OBJECT_INFORMATION_CLASS info_class,
                                          void *ptr, ULONG len )
  {
      NTSTATUS status;
  
      TRACE("(%p,0x%08x,%p,0x%08x)\n", handle, info_class, ptr, len);
  
      switch (info_class)
      {
      case ObjectDataInformation:
      {
          OBJECT_DATA_INFORMATION* p = ptr;
  
          if (len < sizeof(*p)) return STATUS_INVALID_BUFFER_SIZE;
  
          SERVER_START_REQ( set_handle_info )
          {
              req->handle = wine_server_obj_handle( handle );
              req->mask   = HANDLE_FLAG_INHERIT | HANDLE_FLAG_PROTECT_FROM_CLOSE;
              if (p->InheritHandle)    req->flags |= HANDLE_FLAG_INHERIT;
              if (p->ProtectFromClose) req->flags |= HANDLE_FLAG_PROTECT_FROM_CLOSE;
              status = wine_server_call( req );
          }
          SERVER_END_REQ;
      break;
      }
  
      default:
          FIXME("Unsupported information class %u\n", info_class);
          status = STATUS_NOT_IMPLEMENTED;
          break;
      }
      return status;
  }
  