text: /*-
   * Copyright (c) 2003-2010 Tim Kientzle
   * Copyright (c) 2011-2012 Michihiro NAKAJIMA
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer
   *    in this position and unchanged.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include "archive_platform.h"
  __FBSDID("$FreeBSD$");
  
  #if defined(_WIN32) && !defined(__CYGWIN__)
  
  #ifdef HAVE_SYS_TYPES_H
  #include <sys/types.h>
  #endif
  #ifdef HAVE_SYS_UTIME_H
  #include <sys/utime.h>
  #endif
  #ifdef HAVE_ERRNO_H
  #include <errno.h>
  #endif
  #ifdef HAVE_FCNTL_H
  #include <fcntl.h>
  #endif
  #ifdef HAVE_LIMITS_H
  #include <limits.h>
  #endif
  #ifdef HAVE_STDLIB_H
  #include <stdlib.h>
  #endif
  #include <winioctl.h>
  
  /* TODO: Support Mac OS 'quarantine' feature.  This is really just a
   * standard tag to mark files that have been downloaded as "tainted".
   * On Mac OS, we should mark the extracted files as tainted if the
   * archive being read was tainted.  Windows has a similar feature; we
   * should investigate ways to support this generically. */
  
  #include "archive.h"
  #include "archive_acl_private.h"
  #include "archive_string.h"
  #include "archive_entry.h"
  #include "archive_private.h"
  
  #ifndef O_BINARY
  #define O_BINARY 0
  #endif
  #ifndef IO_REPARSE_TAG_SYMLINK
  /* Old SDKs do not provide IO_REPARSE_TAG_SYMLINK */
  #define	IO_REPARSE_TAG_SYMLINK 0xA000000CL
  #endif
  
  static BOOL SetFilePointerEx_perso(HANDLE hFile,
                               LARGE_INTEGER liDistanceToMove,
                               PLARGE_INTEGER lpNewFilePointer,
                               DWORD dwMoveMethod)
  {
  	LARGE_INTEGER li;
  	li.QuadPart = liDistanceToMove.QuadPart;
  	li.LowPart = SetFilePointer(
  	    hFile, li.LowPart, &li.HighPart, dwMoveMethod);
  	if(lpNewFilePointer) {
  		lpNewFilePointer->QuadPart = li.QuadPart;
  	}
  	return li.LowPart != (DWORD)-1 || GetLastError() == NO_ERROR;
  }
  
  struct fixup_entry {
  	struct fixup_entry	*next;
  	struct archive_acl	 acl;
  	mode_t			 mode;
  	int64_t			 atime;
  	int64_t                  birthtime;
  	int64_t			 mtime;
  	int64_t			 ctime;
  	unsigned long		 atime_nanos;
  	unsigned long            birthtime_nanos;
  	unsigned long		 mtime_nanos;
  	unsigned long		 ctime_nanos;
  	unsigned long		 fflags_set;
  	int			 fixup; /* bitmask of what needs fixing */
  	wchar_t			*name;
  };
  
  /*
   * We use a bitmask to track which operations remain to be done for
   * this file.  In particular, this helps us avoid unnecessary
   * operations when it's possible to take care of one step as a
   * side-effect of another.  For example, mkdir() can specify the mode
   * for the newly-created object but symlink() cannot.  This means we
   * can skip chmod() if mkdir() succeeded, but we must explicitly
   * chmod() if we're trying to create a directory that already exists
   * (mkdir() failed) or if we're restoring a symlink.  Similarly, we
   * need to verify UID/GID before trying to restore SUID/SGID bits;
   * that verification can occur explicitly through a stat() call or
   * implicitly because of a successful chown() call.
   */
  #define	TODO_MODE_FORCE		0x40000000
  #define	TODO_MODE_BASE		0x20000000
  #define	TODO_SUID		0x10000000
  #define	TODO_SUID_CHECK		0x08000000
  #define	TODO_SGID		0x04000000
  #define	TODO_SGID_CHECK		0x02000000
  #define	TODO_MODE		(TODO_MODE_BASE|TODO_SUID|TODO_SGID)
  #define	TODO_TIMES		ARCHIVE_EXTRACT_TIME
  #define	TODO_OWNER		ARCHIVE_EXTRACT_OWNER
  #define	TODO_FFLAGS		ARCHIVE_EXTRACT_FFLAGS
  #define	TODO_ACLS		ARCHIVE_EXTRACT_ACL
  #define	TODO_XATTR		ARCHIVE_EXTRACT_XATTR
  #define	TODO_MAC_METADATA	ARCHIVE_EXTRACT_MAC_METADATA
  
  struct archive_write_disk {
  	struct archive	archive;
  
  	mode_t			 user_umask;
  	struct fixup_entry	*fixup_list;
  	struct fixup_entry	*current_fixup;
  	int64_t			 user_uid;
  	int			 skip_file_set;
  	int64_t			 skip_file_dev;
  	int64_t			 skip_file_ino;
  	time_t			 start_time;
  
  	int64_t (*lookup_gid)(void *private, const char *gname, int64_t gid);
  	void  (*cleanup_gid)(void *private);
  	void			*lookup_gid_data;
  	int64_t (*lookup_uid)(void *private, const char *uname, int64_t uid);
  	void  (*cleanup_uid)(void *private);
  	void			*lookup_uid_data;
  
  	/*
  	 * Full path of last file to satisfy symlink checks.
  	 */
  	struct archive_wstring	path_safe;
  
  	/*
  	 * Cached stat data from disk for the current entry.
  	 * If this is valid, pst points to st.  Otherwise,
  	 * pst is null.
  	 */
  	BY_HANDLE_FILE_INFORMATION		 st;
  	BY_HANDLE_FILE_INFORMATION		*pst;
  
  	/* Information about the object being restored right now. */
  	struct archive_entry	*entry; /* Entry being extracted. */
  	wchar_t			*name; /* Name of entry, possibly edited. */
  	struct archive_wstring	 _name_data; /* backing store for 'name' */
  	/* Tasks remaining for this object. */
  	int			 todo;
  	/* Tasks deferred until end-of-archive. */
  	int			 deferred;
  	/* Options requested by the client. */
  	int			 flags;
  	/* Handle for the file we're restoring. */
  	HANDLE		 fh;
  	/* Current offset for writing data to the file. */
  	int64_t			 offset;
  	/* Last offset actually written to disk. */
  	int64_t			 fd_offset;
  	/* Total bytes actually written to files. */
  	int64_t			 total_bytes_written;
  	/* Maximum size of file, -1 if unknown. */
  	int64_t			 filesize;
  	/* Dir we were in before this restore; only for deep paths. */
  	int			 restore_pwd;
  	/* Mode we should use for this entry; affected by _PERM and umask. */
  	mode_t			 mode;
  	/* UID/GID to use in restoring this entry. */
  	int64_t			 uid;
  	int64_t			 gid;
  };
  
  /*
   * Default mode for dirs created automatically (will be modified by umask).
   * Note that POSIX specifies 0777 for implicity-created dirs, "modified
   * by the process' file creation mask."
   */
  #define	DEFAULT_DIR_MODE 0777
  /*
   * Dir modes are restored in two steps:  During the extraction, the permissions
   * in the archive are modified to match the following limits.  During
   * the post-extract fixup pass, the permissions from the archive are
   * applied.
   */
  #define	MINIMUM_DIR_MODE 0700
  #define	MAXIMUM_DIR_MODE 0775
  
  static int	check_symlinks(struct archive_write_disk *);
  static int	create_filesystem_object(struct archive_write_disk *);
  static struct fixup_entry *current_fixup(struct archive_write_disk *,
  		    const wchar_t *pathname);
  static int	cleanup_pathname(struct archive_write_disk *);
  static int	create_dir(struct archive_write_disk *, wchar_t *);
  static int	create_parent_dir(struct archive_write_disk *, wchar_t *);
  static int	la_chmod(const wchar_t *, mode_t);
  static int	older(BY_HANDLE_FILE_INFORMATION *, struct archive_entry *);
  static int	permissive_name_w(struct archive_write_disk *);
  static int	restore_entry(struct archive_write_disk *);
  static int	set_acls(struct archive_write_disk *, HANDLE h,
  		    const wchar_t *, struct archive_acl *);
  static int	set_xattrs(struct archive_write_disk *);
  static int	set_fflags(struct archive_write_disk *);
  static int	set_ownership(struct archive_write_disk *);
  static int	set_mode(struct archive_write_disk *, int mode);
  static int	set_times(struct archive_write_disk *, HANDLE, int,
  		    const wchar_t *, time_t, long, time_t, long, time_t,
  		    long, time_t, long);
  static int	set_times_from_entry(struct archive_write_disk *);
  static struct fixup_entry *sort_dir_list(struct fixup_entry *p);
  static ssize_t	write_data_block(struct archive_write_disk *,
  		    const char *, size_t);
  
  static struct archive_vtable *archive_write_disk_vtable(void);
  
  static int	_archive_write_disk_close(struct archive *);
  static int	_archive_write_disk_free(struct archive *);
  static int	_archive_write_disk_header(struct archive *,
  		    struct archive_entry *);
  static int64_t	_archive_write_disk_filter_bytes(struct archive *, int);
  static int	_archive_write_disk_finish_entry(struct archive *);
  static ssize_t	_archive_write_disk_data(struct archive *, const void *,
  		    size_t);
  static ssize_t	_archive_write_disk_data_block(struct archive *, const void *,
  		    size_t, int64_t);
  
  #define bhfi_dev(bhfi)	((bhfi)->dwVolumeSerialNumber)
  /* Treat FileIndex as i-node. We should remove a sequence number
   * which is high-16-bits of nFileIndexHigh. */
  #define bhfi_ino(bhfi)	\
  	((((int64_t)((bhfi)->nFileIndexHigh & 0x0000FFFFUL)) << 32) \
      + (bhfi)->nFileIndexLow)
  #define bhfi_size(bhfi)	\
      ((((int64_t)(bhfi)->nFileSizeHigh) << 32) + (bhfi)->nFileSizeLow)
  
  static int
  file_information(struct archive_write_disk *a, wchar_t *path,
      BY_HANDLE_FILE_INFORMATION *st, mode_t *mode, int sim_lstat)
  {
  	HANDLE h;
  	int r;
  	DWORD flag = FILE_FLAG_BACKUP_SEMANTICS;
  	WIN32_FIND_DATAW	findData;
  
  	if (sim_lstat || mode != NULL) {
  		h = FindFirstFileW(path, &findData);
  		if (h == INVALID_HANDLE_VALUE &&
  		    GetLastError() == ERROR_INVALID_NAME) {
  			wchar_t *full;
  			full = __la_win_permissive_name_w(path);
  			h = FindFirstFileW(full, &findData);
  			free(full);
  		}
  		if (h == INVALID_HANDLE_VALUE) {
  			la_dosmaperr(GetLastError());
  			return (-1);
  		}
  		FindClose(h);
  	}
  
  	/* Is symlink file ? */
  	if (sim_lstat && 
  	    ((findData.dwFileAttributes
  		        & FILE_ATTRIBUTE_REPARSE_POINT) &&
  		(findData.dwReserved0 == IO_REPARSE_TAG_SYMLINK)))
  		flag |= FILE_FLAG_OPEN_REPARSE_POINT;
  
  	h = CreateFileW(a->name, 0, 0, NULL,
  	    OPEN_EXISTING, flag, NULL);
  	if (h == INVALID_HANDLE_VALUE &&
  	    GetLastError() == ERROR_INVALID_NAME) {
  		wchar_t *full;
  		full = __la_win_permissive_name_w(path);
  		h = CreateFileW(full, 0, 0, NULL,
  		    OPEN_EXISTING, flag, NULL);
  		free(full);
  	}
  	if (h == INVALID_HANDLE_VALUE) {
  		la_dosmaperr(GetLastError());
  		return (-1);
  	}
  	r = GetFileInformationByHandle(h, st);
  	CloseHandle(h);
  	if (r == 0) {
  		la_dosmaperr(GetLastError());
  		return (-1);
  	}
  
  	if (mode == NULL)
  		return (0);
  
  	*mode = S_IRUSR | S_IRGRP | S_IROTH;
  	if ((st->dwFileAttributes & FILE_ATTRIBUTE_READONLY) == 0)
  		*mode |= S_IWUSR | S_IWGRP | S_IWOTH;
  	if ((st->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
  	    findData.dwReserved0 == IO_REPARSE_TAG_SYMLINK)
  		*mode |= S_IFLNK;
  	else if (st->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
  		*mode |= S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH;
  	else {
  		const wchar_t *p;
  
  		*mode |= S_IFREG;
  		p = wcsrchr(path, L'.');
  		if (p != NULL && wcslen(p) == 4) {
  			switch (p[1]) {
  			case L'B': case L'b':
  				if ((p[2] == L'A' || p[2] == L'a' ) &&
  				    (p[3] == L'T' || p[3] == L't' ))
  					*mode |= S_IXUSR | S_IXGRP | S_IXOTH;
  				break;
  			case L'C': case L'c':
  				if (((p[2] == L'M' || p[2] == L'm' ) &&
  				    (p[3] == L'D' || p[3] == L'd' )) ||
  				    ((p[2] == L'M' || p[2] == L'm' ) &&
  				    (p[3] == L'D' || p[3] == L'd' )))
  					*mode |= S_IXUSR | S_IXGRP | S_IXOTH;
  				break;
  			case L'E': case L'e':
  				if ((p[2] == L'X' || p[2] == L'x' ) &&
  				    (p[3] == L'E' || p[3] == L'e' ))
  					*mode |= S_IXUSR | S_IXGRP | S_IXOTH;
  				break;
  			default:
  				break;
  			}
  		}
  	}
  	return (0);
  }
  
  /* 
   * Note: The path, for example, "aa/a/../b../c" will be converted to "aa/c"
   * by GetFullPathNameW() W32 API, which __la_win_permissive_name_w uses.
   * It means we cannot handle multiple dirs in one archive_entry.
   * So we have to make the full-pathname in another way, which does not
   * break "../" path string.
   */
  static int
  permissive_name_w(struct archive_write_disk *a)
  {
  	wchar_t *wn, *wnp;
  	wchar_t *ws, *wsp;
  	DWORD l;
  
  	wnp = a->name;
  	if (wnp[0] == L'\\' && wnp[1] == L'\\' &&
  	    wnp[2] == L'?' && wnp[3] == L'\\')
  		/* We have already a permissive name. */
  		return (0);
  
  	if (wnp[0] == L'\\' && wnp[1] == L'\\' &&
  		wnp[2] == L'.' && wnp[3] == L'\\') {
  		/* This is a device name */
  		if (((wnp[4] >= L'a' && wnp[4] <= L'z') ||
  		     (wnp[4] >= L'A' && wnp[4] <= L'Z')) &&
  			 wnp[5] == L':' && wnp[6] == L'\\') {
  			wnp[2] = L'?';/* Not device name. */
  			return (0);
  		}
  	}
  
  	/*
  	 * A full-pathname starting with a drive name like "C:\abc".
  	 */
  	if (((wnp[0] >= L'a' && wnp[0] <= L'z') ||
  	     (wnp[0] >= L'A' && wnp[0] <= L'Z')) &&
  		 wnp[1] == L':' && wnp[2] == L'\\') {
  		wn = _wcsdup(wnp);
  		if (wn == NULL)
  			return (-1);
  		archive_wstring_ensure(&(a->_name_data), 4 + wcslen(wn) + 1);
  		a->name = a->_name_data.s;
  		/* Prepend "\\?\" */
  		archive_wstrncpy(&(a->_name_data), L"\\\\?\\", 4);
  		archive_wstrcat(&(a->_name_data), wn);
  		free(wn);
  		return (0);
  	}
  
  	/*
  	 * A full-pathname pointig a network drive
  	 * like "\\<server-name>\<share-name>\file". 
  	 */
  	if (wnp[0] == L'\\' && wnp[1] == L'\\' && wnp[2] != L'\\') {
  		const wchar_t *p = &wnp[2];
  
  		/* Skip server-name letters. */
  		while (*p != L'\\' && *p != L'\0')
  			++p;
  		if (*p == L'\\') {
  			const wchar_t *rp = ++p;
  			/* Skip share-name letters. */
  			while (*p != L'\\' && *p != L'\0')
  				++p;
  			if (*p == L'\\' && p != rp) {
  				/* Now, match patterns such as
  				 * "\\server-name\share-name\" */
  				wn = _wcsdup(wnp);
  				if (wn == NULL)
  					return (-1);
  				archive_wstring_ensure(&(a->_name_data),
  					8 + wcslen(wn) + 1);
  				a->name = a->_name_data.s;
  				/* Prepend "\\?\UNC\" */
  				archive_wstrncpy(&(a->_name_data),
  					L"\\\\?\\UNC\\", 8);
  				archive_wstrcat(&(a->_name_data), wn+2);
  				free(wn);
  				return (0);
  			}
  		}
  		return (0);
  	}
  
  	/*
  	 * Get current working directory.
  	 */
  	l = GetCurrentDirectoryW(0, NULL);
  	if (l == 0)
  		return (-1);
  	ws = malloc(l * sizeof(wchar_t));
  	l = GetCurrentDirectoryW(l, ws);
  	if (l == 0) {
  		free(ws);
  		return (-1);
  	}
  	wsp = ws;
  
  	/*
  	 * A full-pathname starting without a drive name like "\abc".
  	 */
  	if (wnp[0] == L'\\') {
  		wn = _wcsdup(wnp);
  		if (wn == NULL)
  			return (-1);
  		archive_wstring_ensure(&(a->_name_data),
  			4 + 2 + wcslen(wn) + 1);
  		a->name = a->_name_data.s;
  		/* Prepend "\\?\" and drive name. */
  		archive_wstrncpy(&(a->_name_data), L"\\\\?\\", 4);
  		archive_wstrncat(&(a->_name_data), wsp, 2);
  		archive_wstrcat(&(a->_name_data), wn);
  		free(wsp);
  		free(wn);
  		return (0);
  	}
  
  	wn = _wcsdup(wnp);
  	if (wn == NULL)
  		return (-1);
  	archive_wstring_ensure(&(a->_name_data), 4 + l + 1 + wcslen(wn) + 1);
  	a->name = a->_name_data.s;
  	/* Prepend "\\?\" and drive name. */
  	archive_wstrncpy(&(a->_name_data), L"\\\\?\\", 4);
  	archive_wstrncat(&(a->_name_data), wsp, l);
  	archive_wstrncat(&(a->_name_data), L"\\", 1);
  	archive_wstrcat(&(a->_name_data), wn);
  	a->name = a->_name_data.s;
  	free(wsp);
  	free(wn);
  	return (0);
  }
  
  static int
  la_chmod(const wchar_t *path, mode_t mode)
  {
  	DWORD attr;
  	BOOL r;
  	wchar_t *fullname;
  	int ret = 0;
  
  	fullname = NULL;
  	attr = GetFileAttributesW(path);
  	if (attr == (DWORD)-1 &&
  	    GetLastError() == ERROR_INVALID_NAME) {
  		fullname = __la_win_permissive_name_w(path);
  		attr = GetFileAttributesW(fullname);
  	}
  	if (attr == (DWORD)-1) {
  		la_dosmaperr(GetLastError());
  		ret = -1;
  		goto exit_chmode;
  	}
  	if (mode & _S_IWRITE)
  		attr &= ~FILE_ATTRIBUTE_READONLY;
  	else
  		attr |= FILE_ATTRIBUTE_READONLY;
  	if (fullname != NULL)
  		r = SetFileAttributesW(fullname, attr);
  	else
  		r = SetFileAttributesW(path, attr);
  	if (r == 0) {
  		la_dosmaperr(GetLastError());
  		ret = -1;
  	}
  exit_chmode:
  	free(fullname);
  	return (ret);
  }
  
  static void *
  la_GetFunctionKernel32(const char *name)
  {
  	static HINSTANCE lib;
  	static int set;
  	if (!set) {
  		set = 1;
  		lib = LoadLibrary("kernel32.dll");
  	}
  	if (lib == NULL) {
  		fprintf(stderr, "Can't load kernel32.dll?!\n");
  		exit(1);
  	}
  	return (void *)GetProcAddress(lib, name);
  }
  
  static int
  la_CreateHardLinkW(wchar_t *linkname, wchar_t *target)
  {
  	static BOOLEAN (WINAPI *f)(LPWSTR, LPWSTR, LPSECURITY_ATTRIBUTES);
  	static int set;
  	BOOL ret;
  
  	if (!set) {
  		set = 1;
  		f = la_GetFunctionKernel32("CreateHardLinkW");
  	}
  	if (!f)
  		return (0);
  	ret = (*f)(linkname, target, NULL);
  	if (!ret) {
  		/* Under windows 2000, it is necessary to remove
  		 * the "\\?\" prefix. */
  #define IS_UNC(name)	((name[0] == L'U' || name[0] == L'u') &&	\
  			 (name[1] == L'N' || name[1] == L'n') &&	\
  			 (name[2] == L'C' || name[2] == L'c') &&	\
  			 name[3] == L'\\')
  		if (!wcsncmp(linkname,L"\\\\?\\", 4)) {
  			linkname += 4;
  			if (IS_UNC(linkname))
  				linkname += 4;
  		}
  		if (!wcsncmp(target,L"\\\\?\\", 4)) {
  			target += 4;
  			if (IS_UNC(target))
  				target += 4;
  		}
  #undef IS_UNC
  		ret = (*f)(linkname, target, NULL);
  	}
  	return (ret);
  }
  
  static int
  la_ftruncate(HANDLE handle, int64_t length)
  {
  	LARGE_INTEGER distance;
  
  	if (GetFileType(handle) != FILE_TYPE_DISK) {
  		errno = EBADF;
  		return (-1);
  	}
  	distance.QuadPart = length;
  	if (!SetFilePointerEx_perso(handle, distance, NULL, FILE_BEGIN)) {
  		la_dosmaperr(GetLastError());
  		return (-1);
  	}
  	if (!SetEndOfFile(handle)) {
  		la_dosmaperr(GetLastError());
  		return (-1);
  	}
  	return (0);
  }
  
  static int
  lazy_stat(struct archive_write_disk *a)
  {
  	if (a->pst != NULL) {
  		/* Already have stat() data available. */
  		return (ARCHIVE_OK);
  	}
  	if (a->fh != INVALID_HANDLE_VALUE &&
  	    GetFileInformationByHandle(a->fh, &a->st) == 0) {
  		a->pst = &a->st;
  		return (ARCHIVE_OK);
  	}
  
  	/*
  	 * XXX At this point, symlinks should not be hit, otherwise
  	 * XXX a race occurred.  Do we want to check explicitly for that?
  	 */
  	if (file_information(a, a->name, &a->st, NULL, 1) == 0) {
  		a->pst = &a->st;
  		return (ARCHIVE_OK);
  	}
  	archive_set_error(&a->archive, errno, "Couldn't stat file");
  	return (ARCHIVE_WARN);
  }
  
  static struct archive_vtable *
  archive_write_disk_vtable(void)
  {
  	static struct archive_vtable av;
  	static int inited = 0;
  
  	if (!inited) {
  		av.archive_close = _archive_write_disk_close;
  		av.archive_filter_bytes = _archive_write_disk_filter_bytes;
  		av.archive_free = _archive_write_disk_free;
  		av.archive_write_header = _archive_write_disk_header;
  		av.archive_write_finish_entry
  		    = _archive_write_disk_finish_entry;
  		av.archive_write_data = _archive_write_disk_data;
  		av.archive_write_data_block = _archive_write_disk_data_block;
  		inited = 1;
  	}
  	return (&av);
  }
  
  static int64_t
  _archive_write_disk_filter_bytes(struct archive *_a, int n)
  {
  	struct archive_write_disk *a = (struct archive_write_disk *)_a;
  	(void)n; /* UNUSED */
  	if (n == -1 || n == 0)
  		return (a->total_bytes_written);
  	return (-1);
  }
  
  
  int
  archive_write_disk_set_options(struct archive *_a, int flags)
  {
  	struct archive_write_disk *a = (struct archive_write_disk *)_a;
  
  	a->flags = flags;
  	return (ARCHIVE_OK);
  }
  
  
  /*
   * Extract this entry to disk.
   *
   * TODO: Validate hardlinks.  According to the standards, we're
   * supposed to check each extracted hardlink and squawk if it refers
   * to a file that we didn't restore.  I'm not entirely convinced this
   * is a good idea, but more importantly: Is there any way to validate
   * hardlinks without keeping a complete list of filenames from the
   * entire archive?? Ugh.
   *
   */
  static int
  _archive_write_disk_header(struct archive *_a, struct archive_entry *entry)
  {
  	struct archive_write_disk *a = (struct archive_write_disk *)_a;
  	struct fixup_entry *fe;
  	int ret, r;
  
  	archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
  	    ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
  	    "archive_write_disk_header");
  	archive_clear_error(&a->archive);
  	if (a->archive.state & ARCHIVE_STATE_DATA) {
  		r = _archive_write_disk_finish_entry(&a->archive);
  		if (r == ARCHIVE_FATAL)
  			return (r);
  	}
  
  	/* Set up for this particular entry. */
  	a->pst = NULL;
  	a->current_fixup = NULL;
  	a->deferred = 0;
  	if (a->entry) {
  		archive_entry_free(a->entry);
  		a->entry = NULL;
  	}
  	a->entry = archive_entry_clone(entry);
  	a->fh = INVALID_HANDLE_VALUE;
  	a->fd_offset = 0;
  	a->offset = 0;
  	a->restore_pwd = -1;
  	a->uid = a->user_uid;
  	a->mode = archive_entry_mode(a->entry);
  	if (archive_entry_size_is_set(a->entry))
  		a->filesize = archive_entry_size(a->entry);
  	else
  		a->filesize = -1;
  	archive_wstrcpy(&(a->_name_data), archive_entry_pathname_w(a->entry));
  	a->name = a->_name_data.s;
  	archive_clear_error(&a->archive);
  
  	/*
  	 * Clean up the requested path.  This is necessary for correct
  	 * dir restores; the dir restore logic otherwise gets messed
  	 * up by nonsense like "dir/.".
  	 */
  	ret = cleanup_pathname(a);
  	if (ret != ARCHIVE_OK)
  		return (ret);
  
  	/*
  	 * Generate a full-pathname and use it from here.
  	 */
  	if (permissive_name_w(a) < 0) {
  		errno = EINVAL;
  		return (ARCHIVE_FAILED);
  	}
  
  	/*
  	 * Query the umask so we get predictable mode settings.
  	 * This gets done on every call to _write_header in case the
  	 * user edits their umask during the extraction for some
  	 * reason.
  	 */
  	umask(a->user_umask = umask(0));
  
  	/* Figure out what we need to do for this entry. */
  	a->todo = TODO_MODE_BASE;
  	if (a->flags & ARCHIVE_EXTRACT_PERM) {
  		a->todo |= TODO_MODE_FORCE; /* Be pushy about permissions. */
  		/*
  		 * SGID requires an extra "check" step because we
  		 * cannot easily predict the GID that the system will
  		 * assign.  (Different systems assign GIDs to files
  		 * based on a variety of criteria, including process
  		 * credentials and the gid of the enclosing
  		 * directory.)  We can only restore the SGID bit if
  		 * the file has the right GID, and we only know the
  		 * GID if we either set it (see set_ownership) or if
  		 * we've actually called stat() on the file after it
  		 * was restored.  Since there are several places at
  		 * which we might verify the GID, we need a TODO bit
  		 * to keep track.
  		 */
  		if (a->mode & S_ISGID)
  			a->todo |= TODO_SGID | TODO_SGID_CHECK;
  		/*
  		 * Verifying the SUID is simpler, but can still be
  		 * done in multiple ways, hence the separate "check" bit.
  		 */
  		if (a->mode & S_ISUID)
  			a->todo |= TODO_SUID | TODO_SUID_CHECK;
  	} else {
  		/*
  		 * User didn't request full permissions, so don't
  		 * restore SUID, SGID bits and obey umask.
  		 */
  		a->mode &= ~S_ISUID;
  		a->mode &= ~S_ISGID;
  		a->mode &= ~S_ISVTX;
  		a->mode &= ~a->user_umask;
  	}
  #if 0
  	if (a->flags & ARCHIVE_EXTRACT_OWNER)
  		a->todo |= TODO_OWNER;
  #endif
  	if (a->flags & ARCHIVE_EXTRACT_TIME)
  		a->todo |= TODO_TIMES;
  	if (a->flags & ARCHIVE_EXTRACT_ACL) {
  		if (archive_entry_filetype(a->entry) == AE_IFDIR)
  			a->deferred |= TODO_ACLS;
  		else
  			a->todo |= TODO_ACLS;
  	}
  	if (a->flags & ARCHIVE_EXTRACT_XATTR)
  		a->todo |= TODO_XATTR;
  	if (a->flags & ARCHIVE_EXTRACT_FFLAGS)
  		a->todo |= TODO_FFLAGS;
  	if (a->flags & ARCHIVE_EXTRACT_SECURE_SYMLINKS) {
  		ret = check_symlinks(a);
  		if (ret != ARCHIVE_OK)
  			return (ret);
  	}
  
  	ret = restore_entry(a);
  
  	/*
  	 * TODO: There are rumours that some extended attributes must
  	 * be restored before file data is written.  If this is true,
  	 * then we either need to write all extended attributes both
  	 * before and after restoring the data, or find some rule for
  	 * determining which must go first and which last.  Due to the
  	 * many ways people are using xattrs, this may prove to be an
  	 * intractable problem.
  	 */
  
  	/*
  	 * Fixup uses the unedited pathname from archive_entry_pathname(),
  	 * because it is relative to the base dir and the edited path
  	 * might be relative to some intermediate dir as a result of the
  	 * deep restore logic.
  	 */
  	if (a->deferred & TODO_MODE) {
  		fe = current_fixup(a, archive_entry_pathname_w(entry));
  		fe->fixup |= TODO_MODE_BASE;
  		fe->mode = a->mode;
  	}
  
  	if ((a->deferred & TODO_TIMES)
  		&& (archive_entry_mtime_is_set(entry)
  		    || archive_entry_atime_is_set(entry))) {
  		fe = current_fixup(a, archive_entry_pathname_w(entry));
  		fe->mode = a->mode;
  		fe->fixup |= TODO_TIMES;
  		if (archive_entry_atime_is_set(entry)) {
  			fe->atime = archive_entry_atime(entry);
  			fe->atime_nanos = archive_entry_atime_nsec(entry);
  		} else {
  			/* If atime is unset, use start time. */
  			fe->atime = a->start_time;
  			fe->atime_nanos = 0;
  		}
  		if (archive_entry_mtime_is_set(entry)) {
  			fe->mtime = archive_entry_mtime(entry);
  			fe->mtime_nanos = archive_entry_mtime_nsec(entry);
  		} else {
  			/* If mtime is unset, use start time. */
  			fe->mtime = a->start_time;
  			fe->mtime_nanos = 0;
  		}
  		if (archive_entry_birthtime_is_set(entry)) {
  			fe->birthtime = archive_entry_birthtime(entry);
  			fe->birthtime_nanos = archive_entry_birthtime_nsec(entry);
  		} else {
  			/* If birthtime is unset, use mtime. */
  			fe->birthtime = fe->mtime;
  			fe->birthtime_nanos = fe->mtime_nanos;
  		}
  	}
  
  	if (a->deferred & TODO_ACLS) {
  		fe = current_fixup(a, archive_entry_pathname_w(entry));
  		archive_acl_copy(&fe->acl, archive_entry_acl(entry));
  	}
  
  	if (a->deferred & TODO_FFLAGS) {
  		fe = current_fixup(a, archive_entry_pathname_w(entry));
  		fe->fixup |= TODO_FFLAGS;
  		/* TODO: Complete this.. defer fflags from below. */
  	}
  
  	/*
  	 * On Windows, A creating sparse file requires a special mark.
  	 */
  	if (a->fh != INVALID_HANDLE_VALUE &&
  	    archive_entry_sparse_count(entry) > 0) {
  		int64_t base = 0, offset, length;
  		int i, cnt = archive_entry_sparse_reset(entry);
  		int sparse = 0;
  
  		for (i = 0; i < cnt; i++) {
  			archive_entry_sparse_next(entry, &offset, &length);
  			if (offset - base >= 4096) {
  				sparse = 1;/* we have a hole. */
  				break;
  			}
  			base = offset + length;
  		}
  		if (sparse) {
  			DWORD dmy;
  			/* Mark this file as sparse. */
  			DeviceIoControl(a->fh, FSCTL_SET_SPARSE,
  			    NULL, 0, NULL, 0, &dmy, NULL);
  		}
  	}
  
  	/* We've created the object and are ready to pour data into it. */
  	if (ret >= ARCHIVE_WARN)
  		a->archive.state = ARCHIVE_STATE_DATA;
  	/*
  	 * If it's not open, tell our client not to try writing.
  	 * In particular, dirs, links, etc, don't get written to.
  	 */
  	if (a->fh == INVALID_HANDLE_VALUE) {
  		archive_entry_set_size(entry, 0);
  		a->filesize = 0;
  	}
  
  	return (ret);
  }
  
  int
  archive_write_disk_set_skip_file(struct archive *_a, int64_t d, int64_t i)
  {
  	struct archive_write_disk *a = (struct archive_write_disk *)_a;
  	archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
  	    ARCHIVE_STATE_ANY, "archive_write_disk_set_skip_file");
  	a->skip_file_set = 1;
  	a->skip_file_dev = d;
  	a->skip_file_ino = i;
  	return (ARCHIVE_OK);
  }
  
  static ssize_t
  write_data_block(struct archive_write_disk *a, const char *buff, size_t size)
  {
  	OVERLAPPED ol;
  	uint64_t start_size = size;
  	DWORD bytes_written = 0;
  	ssize_t block_size = 0, bytes_to_write;
  
  	if (size == 0)
  		return (ARCHIVE_OK);
  
  	if (a->filesize == 0 || a->fh == INVALID_HANDLE_VALUE) {
  		archive_set_error(&a->archive, 0,
  		    "Attempt to write to an empty file");
  		return (ARCHIVE_WARN);
  	}
  
  	if (a->flags & ARCHIVE_EXTRACT_SPARSE) {
  		/* XXX TODO XXX Is there a more appropriate choice here ? */
  		/* This needn't match the filesystem allocation size. */
  		block_size = 16*1024;
  	}
  
  	/* If this write would run beyond the file size, truncate it. */
  	if (a->filesize >= 0 && (int64_t)(a->offset + size) > a->filesize)
  		start_size = size = (size_t)(a->filesize - a->offset);
  
  	/* Write the data. */
  	while (size > 0) {
  		if (block_size == 0) {
  			bytes_to_write = size;
  		} else {
  			/* We're sparsifying the file. */
  			const char *p, *end;
  			int64_t block_end;
  
  			/* Skip leading zero bytes. */
  			for (p = buff, end = buff + size; p < end; ++p) {
  				if (*p != '\0')
  					break;
  			}
  			a->offset += p - buff;
  			size -= p - buff;
  			buff = p;
  			if (size == 0)
  				break;
  
  			/* Calculate next block boundary after offset. */
  			block_end
  			    = (a->offset / block_size + 1) * block_size;
  
  			/* If the adjusted write would cross block boundary,
  			 * truncate it to the block boundary. */
  			bytes_to_write = size;
  			if (a->offset + bytes_to_write > block_end)
  				bytes_to_write = (DWORD)(block_end - a->offset);
  		}
  		memset(&ol, 0, sizeof(ol));
  		ol.Offset = (DWORD)(a->offset & 0xFFFFFFFF);
  		ol.OffsetHigh = (DWORD)(a->offset >> 32);
  		if (!WriteFile(a->fh, buff, (uint32_t)bytes_to_write,
  		    &bytes_written, &ol)) {
  			DWORD lasterr;
  
  			lasterr = GetLastError();
  			if (lasterr == ERROR_ACCESS_DENIED)
  				errno = EBADF;
  			else
  				la_dosmaperr(lasterr);
  			archive_set_error(&a->archive, errno, "Write failed");
  			return (ARCHIVE_WARN);
  		}
  		buff += bytes_written;
  		size -= bytes_written;
  		a->total_bytes_written += bytes_written;
  		a->offset += bytes_written;
  		a->fd_offset = a->offset;
  	}
  	return ((ssize_t)(start_size - size));
  }
  
  static ssize_t
  _archive_write_disk_data_block(struct archive *_a,
      const void *buff, size_t size, int64_t offset)
  {
  	struct archive_write_disk *a = (struct archive_write_disk *)_a;
  	ssize_t r;
  
  	archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
  	    ARCHIVE_STATE_DATA, "archive_write_data_block");
  
  	a->offset = offset;
  	r = write_data_block(a, buff, size);
  	if (r < ARCHIVE_OK)
  		return (r);
  	if ((size_t)r < size) {
  		archive_set_error(&a->archive, 0,
  		    "Write request too large");
  		return (ARCHIVE_WARN);
  	}
  	return (ARCHIVE_OK);
  }
  
  static ssize_t
  _archive_write_disk_data(struct archive *_a, const void *buff, size_t size)
  {
  	struct archive_write_disk *a = (struct archive_write_disk *)_a;
  
  	archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
  	    ARCHIVE_STATE_DATA, "archive_write_data");
  
  	return (write_data_block(a, buff, size));
  }
  
  static int
  _archive_write_disk_finish_entry(struct archive *_a)
  {
  	struct archive_write_disk *a = (struct archive_write_disk *)_a;
  	int ret = ARCHIVE_OK;
  
  	archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
  	    ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
  	    "archive_write_finish_entry");
  	if (a->archive.state & ARCHIVE_STATE_HEADER)
  		return (ARCHIVE_OK);
  	archive_clear_error(&a->archive);
  
  	/* Pad or truncate file to the right size. */
  	if (a->fh == INVALID_HANDLE_VALUE) {
  		/* There's no file. */
  	} else if (a->filesize < 0) {
  		/* File size is unknown, so we can't set the size. */
  	} else if (a->fd_offset == a->filesize) {
  		/* Last write ended at exactly the filesize; we're done. */
  		/* Hopefully, this is the common case. */
  	} else {
  		if (la_ftruncate(a->fh, a->filesize) == -1) {
  			archive_set_error(&a->archive, errno,
  			    "File size could not be restored");
  			return (ARCHIVE_FAILED);
  		}
  	}
  
  	/* Restore metadata. */
  
  	/*
  	 * Look up the "real" UID only if we're going to need it.
  	 * TODO: the TODO_SGID condition can be dropped here, can't it?
  	 */
  	if (a->todo & (TODO_OWNER | TODO_SUID | TODO_SGID)) {
  		a->uid = archive_write_disk_uid(&a->archive,
  		    archive_entry_uname(a->entry),
  		    archive_entry_uid(a->entry));
  	}
  	/* Look up the "real" GID only if we're going to need it. */
  	/* TODO: the TODO_SUID condition can be dropped here, can't it? */
  	if (a->todo & (TODO_OWNER | TODO_SGID | TODO_SUID)) {
  		a->gid = archive_write_disk_gid(&a->archive,
  		    archive_entry_gname(a->entry),
  		    archive_entry_gid(a->entry));
  	 }
  
  	/*
  	 * Restore ownership before set_mode tries to restore suid/sgid
  	 * bits.  If we set the owner, we know what it is and can skip
  	 * a stat() call to examine the ownership of the file on disk.
  	 */
  	if (a->todo & TODO_OWNER)
  		ret = set_ownership(a);
  
  	/*
  	 * set_mode must precede ACLs on systems such as Solaris and
  	 * FreeBSD where setting the mode implicitly clears extended ACLs
  	 */
  	if (a->todo & TODO_MODE) {
  		int r2 = set_mode(a, a->mode);
  		if (r2 < ret) ret = r2;
  	}
  
  	/*
  	 * Security-related extended attributes (such as
  	 * security.capability on Linux) have to be restored last,
  	 * since they're implicitly removed by other file changes.
  	 */
  	if (a->todo & TODO_XATTR) {
  		int r2 = set_xattrs(a);
  		if (r2 < ret) ret = r2;
  	}
  
  	/*
  	 * Some flags prevent file modification; they must be restored after
  	 * file contents are written.
  	 */
  	if (a->todo & TODO_FFLAGS) {
  		int r2 = set_fflags(a);
  		if (r2 < ret) ret = r2;
  	}
  
  	/*
  	 * Time must follow most other metadata;
  	 * otherwise atime will get changed.
  	 */
  	if (a->todo & TODO_TIMES) {
  		int r2 = set_times_from_entry(a);
  		if (r2 < ret) ret = r2;
  	}
  
  	/*
  	 * ACLs must be restored after timestamps because there are
  	 * ACLs that prevent attribute changes (including time).
  	 */
  	if (a->todo & TODO_ACLS) {
  		int r2 = set_acls(a, a->fh,
  				  archive_entry_pathname_w(a->entry),
  				  archive_entry_acl(a->entry));
  		if (r2 < ret) ret = r2;
  	}
  
  	/* If there's an fd, we can close it now. */
  	if (a->fh != INVALID_HANDLE_VALUE) {
  		CloseHandle(a->fh);
  		a->fh = INVALID_HANDLE_VALUE;
  	}
  	/* If there's an entry, we can release it now. */
  	if (a->entry) {
  		archive_entry_free(a->entry);
  		a->entry = NULL;
  	}
  	a->archive.state = ARCHIVE_STATE_HEADER;
  	return (ret);
  }
  
  int
  archive_write_disk_set_group_lookup(struct archive *_a,
      void *private_data,
      int64_t (*lookup_gid)(void *private, const char *gname, int64_t gid),
      void (*cleanup_gid)(void *private))
  {
  	struct archive_write_disk *a = (struct archive_write_disk *)_a;
  	archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
  	    ARCHIVE_STATE_ANY, "archive_write_disk_set_group_lookup");
  
  	if (a->cleanup_gid != NULL && a->lookup_gid_data != NULL)
  		(a->cleanup_gid)(a->lookup_gid_data);
  
  	a->lookup_gid = lookup_gid;
  	a->cleanup_gid = cleanup_gid;
  	a->lookup_gid_data = private_data;
  	return (ARCHIVE_OK);
  }
  
  int
  archive_write_disk_set_user_lookup(struct archive *_a,
      void *private_data,
      int64_t (*lookup_uid)(void *private, const char *uname, int64_t uid),
      void (*cleanup_uid)(void *private))
  {
  	struct archive_write_disk *a = (struct archive_write_disk *)_a;
  	archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
  	    ARCHIVE_STATE_ANY, "archive_write_disk_set_user_lookup");
  
  	if (a->cleanup_uid != NULL && a->lookup_uid_data != NULL)
  		(a->cleanup_uid)(a->lookup_uid_data);
  
  	a->lookup_uid = lookup_uid;
  	a->cleanup_uid = cleanup_uid;
  	a->lookup_uid_data = private_data;
  	return (ARCHIVE_OK);
  }
  
  int64_t
  archive_write_disk_gid(struct archive *_a, const char *name, int64_t id)
  {
         struct archive_write_disk *a = (struct archive_write_disk *)_a;
         archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
             ARCHIVE_STATE_ANY, "archive_write_disk_gid");
         if (a->lookup_gid)
                 return (a->lookup_gid)(a->lookup_gid_data, name, id);
         return (id);
  }
   
  int64_t
  archive_write_disk_uid(struct archive *_a, const char *name, int64_t id)
  {
         struct archive_write_disk *a = (struct archive_write_disk *)_a;
         archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
             ARCHIVE_STATE_ANY, "archive_write_disk_uid");
         if (a->lookup_uid)
                 return (a->lookup_uid)(a->lookup_uid_data, name, id);
         return (id);
  }
  
  /*
   * Create a new archive_write_disk object and initialize it with global state.
   */
  struct archive *
  archive_write_disk_new(void)
  {
  	struct archive_write_disk *a;
  
  	a = (struct archive_write_disk *)malloc(sizeof(*a));
  	if (a == NULL)
  		return (NULL);
  	memset(a, 0, sizeof(*a));
  	a->archive.magic = ARCHIVE_WRITE_DISK_MAGIC;
  	/* We're ready to write a header immediately. */
  	a->archive.state = ARCHIVE_STATE_HEADER;
  	a->archive.vtable = archive_write_disk_vtable();
  	a->start_time = time(NULL);
  	/* Query and restore the umask. */
  	umask(a->user_umask = umask(0));
  	if (archive_wstring_ensure(&a->path_safe, 512) == NULL) {
  		free(a);
  		return (NULL);
  	}
  	return (&a->archive);
  }
  
  static int
  disk_unlink(wchar_t *path)
  {
  	wchar_t *fullname;
  	int r;
  
  	r = _wunlink(path);
  	if (r != 0 && GetLastError() == ERROR_INVALID_NAME) {
  		fullname = __la_win_permissive_name_w(path);
  		r = _wunlink(fullname);
  		free(fullname);
  	}
  	return (r);
  }
  
  static int
  disk_rmdir(wchar_t *path)
  {
  	wchar_t *fullname;
  	int r;
  
  	r = _wrmdir(path);
  	if (r != 0 && GetLastError() == ERROR_INVALID_NAME) {
  		fullname = __la_win_permissive_name_w(path);
  		r = _wrmdir(fullname);
  		free(fullname);
  	}
  	return (r);
  }
  
  /*
   * The main restore function.
   */
  static int
  restore_entry(struct archive_write_disk *a)
  {
  	int ret = ARCHIVE_OK, en;
  
  	if (a->flags & ARCHIVE_EXTRACT_UNLINK && !S_ISDIR(a->mode)) {
  		/*
  		 * TODO: Fix this.  Apparently, there are platforms
  		 * that still allow root to hose the entire filesystem
  		 * by unlinking a dir.  The S_ISDIR() test above
  		 * prevents us from using unlink() here if the new
  		 * object is a dir, but that doesn't mean the old
  		 * object isn't a dir.
  		 */
  		if (disk_unlink(a->name) == 0) {
  			/* We removed it, reset cached stat. */
  			a->pst = NULL;
  		} else if (errno == ENOENT) {
  			/* File didn't exist, that's just as good. */
  		} else if (disk_rmdir(a->name) == 0) {
  			/* It was a dir, but now it's gone. */
  			a->pst = NULL;
  		} else {
  			/* We tried, but couldn't get rid of it. */
  			archive_set_error(&a->archive, errno,
  			    "Could not unlink");
  			return(ARCHIVE_FAILED);
  		}
  	}
  
  	/* Try creating it first; if this fails, we'll try to recover. */
  	en = create_filesystem_object(a);
  
  	if ((en == ENOTDIR || en == ENOENT)
  	    && !(a->flags & ARCHIVE_EXTRACT_NO_AUTODIR)) {
  		wchar_t *full;
  		/* If the parent dir doesn't exist, try creating it. */
  		create_parent_dir(a, a->name);
  		/* Now try to create the object again. */
  		full = __la_win_permissive_name_w(a->name);
  		if (full == NULL) {
  			en = EINVAL;
  		} else {
  			/* Remove multiple directories such as "a/../b../c" */
  			archive_wstrcpy(&(a->_name_data), full);
  			a->name = a->_name_data.s;
  			free(full);
  			en = create_filesystem_object(a);
  		}
  	}
  
  	if ((en == EISDIR || en == EEXIST)
  	    && (a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE)) {
  		/* If we're not overwriting, we're done. */
  		archive_entry_unset_size(a->entry);
  		return (ARCHIVE_OK);
  	}
  
  	/*
  	 * Some platforms return EISDIR if you call
  	 * open(O_WRONLY | O_EXCL | O_CREAT) on a directory, some
  	 * return EEXIST.  POSIX is ambiguous, requiring EISDIR
  	 * for open(O_WRONLY) on a dir and EEXIST for open(O_EXCL | O_CREAT)
  	 * on an existing item.
  	 */
  	if (en == EISDIR) {
  		/* A dir is in the way of a non-dir, rmdir it. */
  		if (disk_rmdir(a->name) != 0) {
  			archive_set_error(&a->archive, errno,
  			    "Can't remove already-existing dir");
  			return (ARCHIVE_FAILED);
  		}
  		a->pst = NULL;
  		/* Try again. */
  		en = create_filesystem_object(a);
  	} else if (en == EEXIST) {
  		mode_t st_mode;
  		/*
  		 * We know something is in the way, but we don't know what;
  		 * we need to find out before we go any further.
  		 */
  		int r = 0;
  		/*
  		 * The SECURE_SYMLINK logic has already removed a
  		 * symlink to a dir if the client wants that.  So
  		 * follow the symlink if we're creating a dir.
  		 */
  		if (S_ISDIR(a->mode))
  			r = file_information(a, a->name, &a->st, &st_mode, 0);
  		/*
  		 * If it's not a dir (or it's a broken symlink),
  		 * then don't follow it.
  		 */
  		if (r != 0 || !S_ISDIR(a->mode))
  			r = file_information(a, a->name, &a->st, &st_mode, 1);
  		if (r != 0) {
  			archive_set_error(&a->archive, errno,
  			    "Can't stat existing object");
  			return (ARCHIVE_FAILED);
  		}
  
  		/*
  		 * NO_OVERWRITE_NEWER doesn't apply to directories.
  		 */
  		if ((a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER)
  		    &&  !S_ISDIR(st_mode)) {
  			if (!older(&(a->st), a->entry)) {
  				archive_entry_unset_size(a->entry);
  				return (ARCHIVE_OK);
  			}
  		}
  
  		/* If it's our archive, we're done. */
  		if (a->skip_file_set &&
  		    bhfi_dev(&a->st) == a->skip_file_dev &&
  		    bhfi_ino(&a->st) == a->skip_file_ino) {
  			archive_set_error(&a->archive, 0,
  			    "Refusing to overwrite archive");
  			return (ARCHIVE_FAILED);
  		}
  
  		if (!S_ISDIR(st_mode)) {
  			/* A non-dir is in the way, unlink it. */
  			if (disk_unlink(a->name) != 0) {
  				archive_set_error(&a->archive, errno,
  				    "Can't unlink already-existing object");
  				return (ARCHIVE_FAILED);
  			}
  			a->pst = NULL;
  			/* Try again. */
  			en = create_filesystem_object(a);
  		} else if (!S_ISDIR(a->mode)) {
  			/* A dir is in the way of a non-dir, rmdir it. */
  			if (disk_rmdir(a->name) != 0) {
  				archive_set_error(&a->archive, errno,
  				    "Can't remove already-existing dir");
  				return (ARCHIVE_FAILED);
  			}
  			/* Try again. */
  			en = create_filesystem_object(a);
  		} else {
  			/*
  			 * There's a dir in the way of a dir.  Don't
  			 * waste time with rmdir()/mkdir(), just fix
  			 * up the permissions on the existing dir.
  			 * Note that we don't change perms on existing
  			 * dirs unless _EXTRACT_PERM is specified.
  			 */
  			if ((a->mode != st_mode)
  			    && (a->todo & TODO_MODE_FORCE))
  				a->deferred |= (a->todo & TODO_MODE);
  			/* Ownership doesn't need deferred fixup. */
  			en = 0; /* Forget the EEXIST. */
  		}
  	}
  
  	if (en) {
  		/* Everything failed; give up here. */
  		archive_set_error(&a->archive, en, "Can't create '%ls'",
  		    a->name);
  		return (ARCHIVE_FAILED);
  	}
  
  	a->pst = NULL; /* Cached stat data no longer valid. */
  	return (ret);
  }
  
  /*
   * Returns 0 if creation succeeds, or else returns errno value from
   * the failed system call.   Note:  This function should only ever perform
   * a single system call.
   */
  static int
  create_filesystem_object(struct archive_write_disk *a)
  {
  	/* Create the entry. */
  	const wchar_t *linkname;
  	wchar_t *fullname;
  	mode_t final_mode, mode;
  	int r;
  
  	/* We identify hard/symlinks according to the link names. */
  	/* Since link(2) and symlink(2) don't handle modes, we're done here. */
  	linkname = archive_entry_hardlink_w(a->entry);
  	if (linkname != NULL) {
  		wchar_t *linkfull, *namefull;
  
  		linkfull = __la_win_permissive_name_w(linkname);
  		namefull = __la_win_permissive_name_w(a->name);
  		if (linkfull == NULL || namefull == NULL) {
  			errno = EINVAL;
  			r = -1;
  		} else {
  			r = la_CreateHardLinkW(namefull, linkfull);
  			if (r == 0) {
  				la_dosmaperr(GetLastError());
  				r = errno;
  			} else
  				r = 0;
  		}
  		/*
  		 * New cpio and pax formats allow hardlink entries
  		 * to carry data, so we may have to open the file
  		 * for hardlink entries.
  		 *
  		 * If the hardlink was successfully created and
  		 * the archive doesn't have carry data for it,
  		 * consider it to be non-authoritative for meta data.
  		 * This is consistent with GNU tar and BSD pax.
  		 * If the hardlink does carry data, let the last
  		 * archive entry decide ownership.
  		 */
  		if (r == 0 && a->filesize <= 0) {
  			a->todo = 0;
  			a->deferred = 0;
  		} else if (r == 0 && a->filesize > 0) {
  			a->fh = CreateFileW(namefull, GENERIC_WRITE, 0, NULL,
  			    TRUNCATE_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
  			if (a->fh == INVALID_HANDLE_VALUE) {
  				la_dosmaperr(GetLastError());
  				r = errno;
  			}
  		}
  		free(linkfull);
  		free(namefull);
  		return (r);
  	}
  	linkname = archive_entry_symlink_w(a->entry);
  	if (linkname != NULL) {
  #if HAVE_SYMLINK
  		return symlink(linkname, a->name) ? errno : 0;
  #else
  		return (EPERM);
  #endif
  	}
  
  	/*
  	 * The remaining system calls all set permissions, so let's
  	 * try to take advantage of that to avoid an extra chmod()
  	 * call.  (Recall that umask is set to zero right now!)
  	 */
  
  	/* Mode we want for the final restored object (w/o file type bits). */
  	final_mode = a->mode & 07777;
  	/*
  	 * The mode that will actually be restored in this step.  Note
  	 * that SUID, SGID, etc, require additional work to ensure
  	 * security, so we never restore them at this point.
  	 */
  	mode = final_mode & 0777 & ~a->user_umask;
  
  	switch (a->mode & AE_IFMT) {
  	default:
  		/* POSIX requires that we fall through here. */
  		/* FALLTHROUGH */
  	case AE_IFREG:
  		fullname = a->name;
  		/* O_WRONLY | O_CREAT | O_EXCL */
  		a->fh = CreateFileW(fullname, GENERIC_WRITE, 0, NULL,
  		    CREATE_NEW, FILE_ATTRIBUTE_NORMAL, NULL);
  		if (a->fh == INVALID_HANDLE_VALUE &&
  		    GetLastError() == ERROR_INVALID_NAME &&
  		    fullname == a->name) {
  			fullname = __la_win_permissive_name_w(a->name);
  			a->fh = CreateFileW(fullname, GENERIC_WRITE, 0, NULL,
  			    CREATE_NEW, FILE_ATTRIBUTE_NORMAL, NULL);
  		}
  		if (a->fh == INVALID_HANDLE_VALUE) {
  			if (GetLastError() == ERROR_ACCESS_DENIED) {
  				DWORD attr;
  				/* Simulate an errno of POSIX system. */
  				attr = GetFileAttributesW(fullname);
  				if (attr == (DWORD)-1)
  					la_dosmaperr(GetLastError());
  				else if (attr & FILE_ATTRIBUTE_DIRECTORY)
  					errno = EISDIR;
  				else
  					errno = EACCES;
  			} else
  				la_dosmaperr(GetLastError());
  			r = 1;
  		} else
  			r = 0;
  		if (fullname != a->name)
  			free(fullname);
  		break;
  	case AE_IFCHR:
  	case AE_IFBLK:
  		/* TODO: Find a better way to warn about our inability
  		 * to restore a block device node. */
  		return (EINVAL);
  	case AE_IFDIR:
  		mode = (mode | MINIMUM_DIR_MODE) & MAXIMUM_DIR_MODE;
  		fullname = a->name;
  		r = CreateDirectoryW(fullname, NULL);
  		if (r == 0 && GetLastError() == ERROR_INVALID_NAME &&
  			fullname == a->name) {
  			fullname = __la_win_permissive_name_w(a->name);
  			r = CreateDirectoryW(fullname, NULL);
  		}
  		if (r != 0) {
  			r = 0;
  			/* Defer setting dir times. */
  			a->deferred |= (a->todo & TODO_TIMES);
  			a->todo &= ~TODO_TIMES;
  			/* Never use an immediate chmod(). */
  			/* We can't avoid the chmod() entirely if EXTRACT_PERM
  			 * because of SysV SGID inheritance. */
  			if ((mode != final_mode)
  			    || (a->flags & ARCHIVE_EXTRACT_PERM))
  				a->deferred |= (a->todo & TODO_MODE);
  			a->todo &= ~TODO_MODE;
  		} else {
  			la_dosmaperr(GetLastError());
  			r = -1;
  		}
  		if (fullname != a->name)
  			free(fullname);
  		break;
  	case AE_IFIFO:
  		/* TODO: Find a better way to warn about our inability
  		 * to restore a fifo. */
  		return (EINVAL);
  	}
  
  	/* All the system calls above set errno on failure. */
  	if (r)
  		return (errno);
  
  	/* If we managed to set the final mode, we've avoided a chmod(). */
  	if (mode == final_mode)
  		a->todo &= ~TODO_MODE;
  	return (0);
  }
  
  /*
   * Cleanup function for archive_extract.  Mostly, this involves processing
   * the fixup list, which is used to address a number of problems:
   *   * Dir permissions might prevent us from restoring a file in that
   *     dir, so we restore the dir with minimum 0700 permissions first,
   *     then correct the mode at the end.
   *   * Similarly, the act of restoring a file touches the directory
   *     and changes the timestamp on the dir, so we have to touch-up dir
   *     timestamps at the end as well.
   *   * Some file flags can interfere with the restore by, for example,
   *     preventing the creation of hardlinks to those files.
   *   * Mac OS extended metadata includes ACLs, so must be deferred on dirs.
   *
   * Note that tar/cpio do not require that archives be in a particular
   * order; there is no way to know when the last file has been restored
   * within a directory, so there's no way to optimize the memory usage
   * here by fixing up the directory any earlier than the
   * end-of-archive.
   *
   * XXX TODO: Directory ACLs should be restored here, for the same
   * reason we set directory perms here. XXX
   */
  static int
  _archive_write_disk_close(struct archive *_a)
  {
  	struct archive_write_disk *a = (struct archive_write_disk *)_a;
  	struct fixup_entry *next, *p;
  	int ret;
  
  	archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
  	    ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
  	    "archive_write_disk_close");
  	ret = _archive_write_disk_finish_entry(&a->archive);
  
  	/* Sort dir list so directories are fixed up in depth-first order. */
  	p = sort_dir_list(a->fixup_list);
  
  	while (p != NULL) {
  		a->pst = NULL; /* Mark stat cache as out-of-date. */
  		if (p->fixup & TODO_TIMES) {
  			set_times(a, INVALID_HANDLE_VALUE, p->mode, p->name,
  			    p->atime, p->atime_nanos,
  			    p->birthtime, p->birthtime_nanos,
  			    p->mtime, p->mtime_nanos,
  			    p->ctime, p->ctime_nanos);
  		}
  		if (p->fixup & TODO_MODE_BASE)
  			la_chmod(p->name, p->mode);
  		if (p->fixup & TODO_ACLS)
  			set_acls(a, INVALID_HANDLE_VALUE, p->name, &p->acl);
  		next = p->next;
  		archive_acl_clear(&p->acl);
  		free(p->name);
  		free(p);
  		p = next;
  	}
  	a->fixup_list = NULL;
  	return (ret);
  }
  
  static int
  _archive_write_disk_free(struct archive *_a)
  {
  	struct archive_write_disk *a;
  	int ret;
  	if (_a == NULL)
  		return (ARCHIVE_OK);
  	archive_check_magic(_a, ARCHIVE_WRITE_DISK_MAGIC,
  	    ARCHIVE_STATE_ANY | ARCHIVE_STATE_FATAL, "archive_write_disk_free");
  	a = (struct archive_write_disk *)_a;
  	ret = _archive_write_disk_close(&a->archive);
  	archive_write_disk_set_group_lookup(&a->archive, NULL, NULL, NULL);
  	archive_write_disk_set_user_lookup(&a->archive, NULL, NULL, NULL);
  	if (a->entry)
  		archive_entry_free(a->entry);
  	archive_wstring_free(&a->_name_data);
  	archive_string_free(&a->archive.error_string);
  	archive_wstring_free(&a->path_safe);
  	a->archive.magic = 0;
  	__archive_clean(&a->archive);
  	free(a);
  	return (ret);
  }
  
  /*
   * Simple O(n log n) merge sort to order the fixup list.  In
   * particular, we want to restore dir timestamps depth-first.
   */
  static struct fixup_entry *
  sort_dir_list(struct fixup_entry *p)
  {
  	struct fixup_entry *a, *b, *t;
  
  	if (p == NULL)
  		return (NULL);
  	/* A one-item list is already sorted. */
  	if (p->next == NULL)
  		return (p);
  
  	/* Step 1: split the list. */
  	t = p;
  	a = p->next->next;
  	while (a != NULL) {
  		/* Step a twice, t once. */
  		a = a->next;
  		if (a != NULL)
  			a = a->next;
  		t = t->next;
  	}
  	/* Now, t is at the mid-point, so break the list here. */
  	b = t->next;
  	t->next = NULL;
  	a = p;
  
  	/* Step 2: Recursively sort the two sub-lists. */
  	a = sort_dir_list(a);
  	b = sort_dir_list(b);
  
  	/* Step 3: Merge the returned lists. */
  	/* Pick the first element for the merged list. */
  	if (wcscmp(a->name, b->name) > 0) {
  		t = p = a;
  		a = a->next;
  	} else {
  		t = p = b;
  		b = b->next;
  	}
  
  	/* Always put the later element on the list first. */
  	while (a != NULL && b != NULL) {
  		if (wcscmp(a->name, b->name) > 0) {
  			t->next = a;
  			a = a->next;
  		} else {
  			t->next = b;
  			b = b->next;
  		}
  		t = t->next;
  	}
  
  	/* Only one list is non-empty, so just splice it on. */
  	if (a != NULL)
  		t->next = a;
  	if (b != NULL)
  		t->next = b;
  
  	return (p);
  }
  
  /*
   * Returns a new, initialized fixup entry.
   *
   * TODO: Reduce the memory requirements for this list by using a tree
   * structure rather than a simple list of names.
   */
  static struct fixup_entry *
  new_fixup(struct archive_write_disk *a, const wchar_t *pathname)
  {
  	struct fixup_entry *fe;
  
  	fe = (struct fixup_entry *)calloc(1, sizeof(struct fixup_entry));
  	if (fe == NULL)
  		return (NULL);
  	fe->next = a->fixup_list;
  	a->fixup_list = fe;
  	fe->fixup = 0;
  	fe->name = _wcsdup(pathname);
  	return (fe);
  }
  
  /*
   * Returns a fixup structure for the current entry.
   */
  static struct fixup_entry *
  current_fixup(struct archive_write_disk *a, const wchar_t *pathname)
  {
  	if (a->current_fixup == NULL)
  		a->current_fixup = new_fixup(a, pathname);
  	return (a->current_fixup);
  }
  
  /* TODO: Make this work. */
  /*
   * TODO: The deep-directory support bypasses this; disable deep directory
   * support if we're doing symlink checks.
   */
  /*
   * TODO: Someday, integrate this with the deep dir support; they both
   * scan the path and both can be optimized by comparing against other
   * recent paths.
   */
  /* TODO: Extend this to support symlinks on Windows Vista and later. */
  static int
  check_symlinks(struct archive_write_disk *a)
  {
  	wchar_t *pn, *p;
  	wchar_t c;
  	int r;
  	BY_HANDLE_FILE_INFORMATION st;
  	mode_t st_mode;
  
  	/*
  	 * Guard against symlink tricks.  Reject any archive entry whose
  	 * destination would be altered by a symlink.
  	 */
  	/* Whatever we checked last time doesn't need to be re-checked. */
  	pn = a->name;
  	p = a->path_safe.s;
  	while ((*pn != '\0') && (*p == *pn))
  		++p, ++pn;
  	c = pn[0];
  	/* Keep going until we've checked the entire name. */
  	while (pn[0] != '\0' && (pn[0] != '\\' || pn[1] != '\0')) {
  		/* Skip the next path element. */
  		while (*pn != '\0' && *pn != '\\')
  			++pn;
  		c = pn[0];
  		pn[0] = '\0';
  		/* Check that we haven't hit a symlink. */
  		r = file_information(a, a->name, &st, &st_mode, 1);
  		if (r != 0) {
  			/* We've hit a dir that doesn't exist; stop now. */
  			if (errno == ENOENT)
  				break;
  		} else if (S_ISLNK(st_mode)) {
  			if (c == '\0') {
  				/*
  				 * Last element is symlink; remove it
  				 * so we can overwrite it with the
  				 * item being extracted.
  				 */
  				if (disk_unlink(a->name)) {
  					archive_set_error(&a->archive, errno,
  					    "Could not remove symlink %ls",
  					    a->name);
  					pn[0] = c;
  					return (ARCHIVE_FAILED);
  				}
  				a->pst = NULL;
  				/*
  				 * Even if we did remove it, a warning
  				 * is in order.  The warning is silly,
  				 * though, if we're just replacing one
  				 * symlink with another symlink.
  				 */
  				if (!S_ISLNK(a->mode)) {
  					archive_set_error(&a->archive, 0,
  					    "Removing symlink %ls",
  					    a->name);
  				}
  				/* Symlink gone.  No more problem! */
  				pn[0] = c;
  				return (0);
  			} else if (a->flags & ARCHIVE_EXTRACT_UNLINK) {
  				/* User asked us to remove problems. */
  				if (disk_unlink(a->name) != 0) {
  					archive_set_error(&a->archive, 0,
  					    "Cannot remove intervening "
  					    "symlink %ls", a->name);
  					pn[0] = c;
  					return (ARCHIVE_FAILED);
  				}
  				a->pst = NULL;
  			} else {
  				archive_set_error(&a->archive, 0,
  				    "Cannot extract through symlink %ls",
  				    a->name);
  				pn[0] = c;
  				return (ARCHIVE_FAILED);
  			}
  		}
  	}
  	pn[0] = c;
  	/* We've checked and/or cleaned the whole path, so remember it. */
  	archive_wstrcpy(&a->path_safe, a->name);
  	return (ARCHIVE_OK);
  }
  
  static int
  guidword(wchar_t *p, int n)
  {
  	int i;
  
  	for (i = 0; i < n; i++) {
  		if ((*p >= L'0' && *p <= L'9') ||
  		    (*p >= L'a' && *p <= L'f') ||
  		    (*p >= L'A' && *p <= L'F'))
  			p++;
  		else
  			return (-1);
  	}
  	return (0);
  }
  
  /*
   * Canonicalize the pathname.  In particular, this strips duplicate
   * '\' characters, '.' elements, and trailing '\'.  It also raises an
   * error for an empty path, a trailing '..' or (if _SECURE_NODOTDOT is
   * set) any '..' in the path.
   */
  static int
  cleanup_pathname(struct archive_write_disk *a)
  {
  	wchar_t *dest, *src, *p, *top;
  	wchar_t separator = L'\0';
  
  	p = a->name;
  	if (*p == L'\0') {
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  		    "Invalid empty pathname");
  		return (ARCHIVE_FAILED);
  	}
  
  	/* Replace '/' by '\' */
  	for (; *p != L'\0'; p++) {
  		if (*p == L'/')
  			*p = L'\\';
  	}
  	p = a->name;
  
  	/* Skip leading "\\.\" or "\\?\" or "\\?\UNC\" or
  	 * "\\?\Volume{GUID}\"
  	 * (absolute path prefixes used by Windows API) */
  	if (p[0] == L'\\' && p[1] == L'\\' &&
  	    (p[2] == L'.' || p[2] == L'?') && p[3] ==  L'\\')
  	{
  		/* A path begin with "\\?\UNC\" */
  		if (p[2] == L'?' &&
  		    (p[4] == L'U' || p[4] == L'u') &&
  		    (p[5] == L'N' || p[5] == L'n') &&
  		    (p[6] == L'C' || p[6] == L'c') &&
  		    p[7] == L'\\')
  			p += 8;
  		/* A path begin with "\\?\Volume{GUID}\" */
  		else if (p[2] == L'?' &&
  		    (p[4] == L'V' || p[4] == L'v') &&
  		    (p[5] == L'O' || p[5] == L'o') &&
  		    (p[6] == L'L' || p[6] == L'l') &&
  		    (p[7] == L'U' || p[7] == L'u') &&
  		    (p[8] == L'M' || p[8] == L'm') &&
  		    (p[9] == L'E' || p[9] == L'e') &&
  		    p[10] == L'{') {
  			if (guidword(p+11, 8) == 0 && p[19] == L'-' &&
  			    guidword(p+20, 4) == 0 && p[24] == L'-' &&
  			    guidword(p+25, 4) == 0 && p[29] == L'-' &&
  			    guidword(p+30, 4) == 0 && p[34] == L'-' &&
  			    guidword(p+35, 12) == 0 && p[47] == L'}' &&
  			    p[48] == L'\\')
  				p += 49;
  			else
  				p += 4;
  		/* A path begin with "\\.\PhysicalDriveX" */
  		} else if (p[2] == L'.' &&
  		    (p[4] == L'P' || p[4] == L'p') &&
  		    (p[5] == L'H' || p[5] == L'h') &&
  		    (p[6] == L'Y' || p[6] == L'y') &&
  		    (p[7] == L'S' || p[7] == L's') &&
  		    (p[8] == L'I' || p[8] == L'i') &&
  		    (p[9] == L'C' || p[9] == L'c') &&
  		    (p[9] == L'A' || p[9] == L'a') &&
  		    (p[9] == L'L' || p[9] == L'l') &&
  		    (p[9] == L'D' || p[9] == L'd') &&
  		    (p[9] == L'R' || p[9] == L'r') &&
  		    (p[9] == L'I' || p[9] == L'i') &&
  		    (p[9] == L'V' || p[9] == L'v') &&
  		    (p[9] == L'E' || p[9] == L'e') &&
  		    (p[10] >= L'0' && p[10] <= L'9') &&
  		    p[11] == L'\0') {
  			archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  			    "Path is a physical drive name");
  			return (ARCHIVE_FAILED);
  		} else
  			p += 4;
  	}
  
  	/* Skip leading drive letter from archives created
  	 * on Windows. */
  	if (((p[0] >= L'a' && p[0] <= L'z') ||
  	     (p[0] >= L'A' && p[0] <= L'Z')) &&
  		 p[1] == L':') {
  		if (p[2] == L'\0') {
  			archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  			    "Path is a drive name");
  			return (ARCHIVE_FAILED);
  		}
  		if (p[2] == L'\\')
  			p += 2;
  	}
  
  	top = dest = src = p;
  	/* Rewrite the path name if its character is a unusable. */
  	for (; *p != L'\0'; p++) {
  		if (*p == L':' || *p == L'*' || *p == L'?' || *p == L'"' ||
  		    *p == L'<' || *p == L'>' || *p == L'|')
  			*p = L'_';
  	}
  	/* Skip leading '\'. */
  	if (*src == L'\\')
  		separator = *src++;
  
  	/* Scan the pathname one element at a time. */
  	for (;;) {
  		/* src points to first char after '\' */
  		if (src[0] == L'\0') {
  			break;
  		} else if (src[0] == L'\\') {
  			/* Found '\\'('//'), ignore second one. */
  			src++;
  			continue;
  		} else if (src[0] == L'.') {
  			if (src[1] == L'\0') {
  				/* Ignore trailing '.' */
  				break;
  			} else if (src[1] == L'\\') {
  				/* Skip '.\'. */
  				src += 2;
  				continue;
  			} else if (src[1] == L'.') {
  				if (src[2] == L'\\' || src[2] == L'\0') {
  					/* Conditionally warn about '..' */
  					if (a->flags &
  					    ARCHIVE_EXTRACT_SECURE_NODOTDOT) {
  						archive_set_error(&a->archive,
  						    ARCHIVE_ERRNO_MISC,
  						    "Path contains '..'");
  						return (ARCHIVE_FAILED);
  					}
  				}
  				/*
  				 * Note: Under no circumstances do we
  				 * remove '..' elements.  In
  				 * particular, restoring
  				 * '\foo\..\bar\' should create the
  				 * 'foo' dir as a side-effect.
  				 */
  			}
  		}
  
  		/* Copy current element, including leading '\'. */
  		if (separator)
  			*dest++ = L'\\';
  		while (*src != L'\0' && *src != L'\\') {
  			*dest++ = *src++;
  		}
  
  		if (*src == L'\0')
  			break;
  
  		/* Skip '\' separator. */
  		separator = *src++;
  	}
  	/*
  	 * We've just copied zero or more path elements, not including the
  	 * final '\'.
  	 */
  	if (dest == top) {
  		/*
  		 * Nothing got copied.  The path must have been something
  		 * like '.' or '\' or './' or '/././././/./'.
  		 */
  		if (separator)
  			*dest++ = L'\\';
  		else
  			*dest++ = L'.';
  	}
  	/* Terminate the result. */
  	*dest = L'\0';
  	return (ARCHIVE_OK);
  }
  
  /*
   * Create the parent directory of the specified path, assuming path
   * is already in mutable storage.
   */
  static int
  create_parent_dir(struct archive_write_disk *a, wchar_t *path)
  {
  	wchar_t *slash;
  	int r;
  
  	/* Remove tail element to obtain parent name. */
  	slash = wcsrchr(path, L'\\');
  	if (slash == NULL)
  		return (ARCHIVE_OK);
  	*slash = L'\0';
  	r = create_dir(a, path);
  	*slash = L'\\';
  	return (r);
  }
  
  /*
   * Create the specified dir, recursing to create parents as necessary.
   *
   * Returns ARCHIVE_OK if the path exists when we're done here.
   * Otherwise, returns ARCHIVE_FAILED.
   * Assumes path is in mutable storage; path is unchanged on exit.
   */
  static int
  create_dir(struct archive_write_disk *a, wchar_t *path)
  {
  	BY_HANDLE_FILE_INFORMATION st;
  	struct fixup_entry *le;
  	wchar_t *slash, *base, *full;
  	mode_t mode_final, mode, st_mode;
  	int r;
  
  	/* Check for special names and just skip them. */
  	slash = wcsrchr(path, L'\\');
  	if (slash == NULL)
  		base = path;
  	else
  		base = slash + 1;
  
  	if (base[0] == L'\0' ||
  	    (base[0] == L'.' && base[1] == L'\0') ||
  	    (base[0] == L'.' && base[1] == L'.' && base[2] == L'\0')) {
  		/* Don't bother trying to create null path, '.', or '..'. */
  		if (slash != NULL) {
  			*slash = L'\0';
  			r = create_dir(a, path);
  			*slash = L'\\';
  			return (r);
  		}
  		return (ARCHIVE_OK);
  	}
  
  	/*
  	 * Yes, this should be stat() and not lstat().  Using lstat()
  	 * here loses the ability to extract through symlinks.  Also note
  	 * that this should not use the a->st cache.
  	 */
  	if (file_information(a, path, &st, &st_mode, 0) == 0) {
  		if (S_ISDIR(st_mode))
  			return (ARCHIVE_OK);
  		if ((a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE)) {
  			archive_set_error(&a->archive, EEXIST,
  			    "Can't create directory '%ls'", path);
  			return (ARCHIVE_FAILED);
  		}
  		if (disk_unlink(path) != 0) {
  			archive_set_error(&a->archive, errno,
  			    "Can't create directory '%ls': "
  			    "Conflicting file cannot be removed",
  			    path);
  			return (ARCHIVE_FAILED);
  		}
  	} else if (errno != ENOENT && errno != ENOTDIR) {
  		/* Stat failed? */
  		archive_set_error(&a->archive, errno,
  		    "Can't test directory '%ls'", path);
  		return (ARCHIVE_FAILED);
  	} else if (slash != NULL) {
  		*slash = '\0';
  		r = create_dir(a, path);
  		*slash = '\\';
  		if (r != ARCHIVE_OK)
  			return (r);
  	}
  
  	/*
  	 * Mode we want for the final restored directory.  Per POSIX,
  	 * implicitly-created dirs must be created obeying the umask.
  	 * There's no mention whether this is different for privileged
  	 * restores (which the rest of this code handles by pretending
  	 * umask=0).  I've chosen here to always obey the user's umask for
  	 * implicit dirs, even if _EXTRACT_PERM was specified.
  	 */
  	mode_final = DEFAULT_DIR_MODE & ~a->user_umask;
  	/* Mode we want on disk during the restore process. */
  	mode = mode_final;
  	mode |= MINIMUM_DIR_MODE;
  	mode &= MAXIMUM_DIR_MODE;
  	/*
  	 * Apply __la_win_permissive_name_w to path in order to
  	 * remove '../' path string.
  	 */
  	full = __la_win_permissive_name_w(path);
  	if (full == NULL)
  		errno = EINVAL;
  	else if (CreateDirectoryW(full, NULL) != 0) {
  		if (mode != mode_final) {
  			le = new_fixup(a, path);
  			le->fixup |=TODO_MODE_BASE;
  			le->mode = mode_final;
  		}
  		free(full);
  		return (ARCHIVE_OK);
  	} else {
  		la_dosmaperr(GetLastError());
  	}
  	free(full);
  
  	/*
  	 * Without the following check, a/b/../b/c/d fails at the
  	 * second visit to 'b', so 'd' can't be created.  Note that we
  	 * don't add it to the fixup list here, as it's already been
  	 * added.
  	 */
  	if (file_information(a, path, &st, &st_mode, 0) == 0 &&
  	    S_ISDIR(st_mode))
  		return (ARCHIVE_OK);
  
  	archive_set_error(&a->archive, errno, "Failed to create dir '%ls'",
  	    path);
  	return (ARCHIVE_FAILED);
  }
  
  /*
   * Note: Although we can skip setting the user id if the desired user
   * id matches the current user, we cannot skip setting the group, as
   * many systems set the gid based on the containing directory.  So
   * we have to perform a chown syscall if we want to set the SGID
   * bit.  (The alternative is to stat() and then possibly chown(); it's
   * more efficient to skip the stat() and just always chown().)  Note
   * that a successful chown() here clears the TODO_SGID_CHECK bit, which
   * allows set_mode to skip the stat() check for the GID.
   */
  static int
  set_ownership(struct archive_write_disk *a)
  {
  /* unfortunately, on win32 there is no 'root' user with uid 0,
     so we just have to try the chown and see if it works */
  
  	/* If we know we can't change it, don't bother trying. */
  	if (a->user_uid != 0  &&  a->user_uid != a->uid) {
  		archive_set_error(&a->archive, errno,
  		    "Can't set UID=%jd", (intmax_t)a->uid);
  		return (ARCHIVE_WARN);
  	}
  
  	archive_set_error(&a->archive, errno,
  	    "Can't set user=%jd/group=%jd for %ls",
  	    (intmax_t)a->uid, (intmax_t)a->gid, a->name);
  	return (ARCHIVE_WARN);
  }
  
  static int
  set_times(struct archive_write_disk *a,
      HANDLE h, int mode, const wchar_t *name,
      time_t atime, long atime_nanos,
      time_t birthtime, long birthtime_nanos,
      time_t mtime, long mtime_nanos,
      time_t ctime_sec, long ctime_nanos)
  {
  #define EPOC_TIME ARCHIVE_LITERAL_ULL(116444736000000000)
  #define WINTIME(sec, nsec) ((Int32x32To64(sec, 10000000) + EPOC_TIME)\
  	 + (((nsec)/1000)*10))
  
  	HANDLE hw = 0;
  	ULARGE_INTEGER wintm;
  	FILETIME *pfbtime;
  	FILETIME fatime, fbtime, fmtime;
  
  	(void)ctime_sec; /* UNUSED */
  	(void)ctime_nanos; /* UNUSED */
  
  	if (h != INVALID_HANDLE_VALUE) {
  		hw = NULL;
  	} else {
  		wchar_t *ws;
  
  		if (S_ISLNK(mode))
  			return (ARCHIVE_OK);
  		ws = __la_win_permissive_name_w(name);
  		if (ws == NULL)
  			goto settimes_failed;
  		hw = CreateFileW(ws, FILE_WRITE_ATTRIBUTES,
  		    0, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
  		free(ws);
  		if (hw == INVALID_HANDLE_VALUE)
  			goto settimes_failed;
  		h = hw;
  	}
  
  	wintm.QuadPart = WINTIME(atime, atime_nanos);
  	fatime.dwLowDateTime = wintm.LowPart;
  	fatime.dwHighDateTime = wintm.HighPart;
  	wintm.QuadPart = WINTIME(mtime, mtime_nanos);
  	fmtime.dwLowDateTime = wintm.LowPart;
  	fmtime.dwHighDateTime = wintm.HighPart;
  	/*
  	 * SetFileTime() supports birthtime.
  	 */
  	if (birthtime > 0 || birthtime_nanos > 0) {
  		wintm.QuadPart = WINTIME(birthtime, birthtime_nanos);
  		fbtime.dwLowDateTime = wintm.LowPart;
  		fbtime.dwHighDateTime = wintm.HighPart;
  		pfbtime = &fbtime;
  	} else
  		pfbtime = NULL;
  	if (SetFileTime(h, pfbtime, &fatime, &fmtime) == 0)
  		goto settimes_failed;
  	CloseHandle(hw);
  	return (ARCHIVE_OK);
  
  settimes_failed:
  	CloseHandle(hw);
  	archive_set_error(&a->archive, EINVAL, "Can't restore time");
  	return (ARCHIVE_WARN);
  }
  
  static int
  set_times_from_entry(struct archive_write_disk *a)
  {
  	time_t atime, birthtime, mtime, ctime_sec;
  	long atime_nsec, birthtime_nsec, mtime_nsec, ctime_nsec;
  
  	/* Suitable defaults. */
  	atime = birthtime = mtime = ctime_sec = a->start_time;
  	atime_nsec = birthtime_nsec = mtime_nsec = ctime_nsec = 0;
  
  	/* If no time was provided, we're done. */
  	if (!archive_entry_atime_is_set(a->entry)
  	    && !archive_entry_birthtime_is_set(a->entry)
  	    && !archive_entry_mtime_is_set(a->entry))
  		return (ARCHIVE_OK);
  
  	if (archive_entry_atime_is_set(a->entry)) {
  		atime = archive_entry_atime(a->entry);
  		atime_nsec = archive_entry_atime_nsec(a->entry);
  	}
  	if (archive_entry_birthtime_is_set(a->entry)) {
  		birthtime = archive_entry_birthtime(a->entry);
  		birthtime_nsec = archive_entry_birthtime_nsec(a->entry);
  	}
  	if (archive_entry_mtime_is_set(a->entry)) {
  		mtime = archive_entry_mtime(a->entry);
  		mtime_nsec = archive_entry_mtime_nsec(a->entry);
  	}
  	if (archive_entry_ctime_is_set(a->entry)) {
  		ctime_sec = archive_entry_ctime(a->entry);
  		ctime_nsec = archive_entry_ctime_nsec(a->entry);
  	}
  
  	return set_times(a, a->fh, a->mode, a->name,
  			 atime, atime_nsec,
  			 birthtime, birthtime_nsec,
  			 mtime, mtime_nsec,
  			 ctime_sec, ctime_nsec);
  }
  
  static int
  set_mode(struct archive_write_disk *a, int mode)
  {
  	int r = ARCHIVE_OK;
  	mode &= 07777; /* Strip off file type bits. */
  
  	if (a->todo & TODO_SGID_CHECK) {
  		/*
  		 * If we don't know the GID is right, we must stat()
  		 * to verify it.  We can't just check the GID of this
  		 * process, since systems sometimes set GID from
  		 * the enclosing dir or based on ACLs.
  		 */
  		if ((r = lazy_stat(a)) != ARCHIVE_OK)
  			return (r);
  		if (0 != a->gid) {
  			mode &= ~ S_ISGID;
  		}
  		/* While we're here, double-check the UID. */
  		if (0 != a->uid
  		    && (a->todo & TODO_SUID)) {
  			mode &= ~ S_ISUID;
  		}
  		a->todo &= ~TODO_SGID_CHECK;
  		a->todo &= ~TODO_SUID_CHECK;
  	} else if (a->todo & TODO_SUID_CHECK) {
  		/*
  		 * If we don't know the UID is right, we can just check
  		 * the user, since all systems set the file UID from
  		 * the process UID.
  		 */
  		if (a->user_uid != a->uid) {
  			mode &= ~ S_ISUID;
  		}
  		a->todo &= ~TODO_SUID_CHECK;
  	}
  
  	if (S_ISLNK(a->mode)) {
  #ifdef HAVE_LCHMOD
  		/*
  		 * If this is a symlink, use lchmod().  If the
  		 * platform doesn't support lchmod(), just skip it.  A
  		 * platform that doesn't provide a way to set
  		 * permissions on symlinks probably ignores
  		 * permissions on symlinks, so a failure here has no
  		 * impact.
  		 */
  		if (lchmod(a->name, mode) != 0) {
  			archive_set_error(&a->archive, errno,
  			    "Can't set permissions to 0%o", (int)mode);
  			r = ARCHIVE_WARN;
  		}
  #endif
  	} else if (!S_ISDIR(a->mode)) {
  		/*
  		 * If it's not a symlink and not a dir, then use
  		 * fchmod() or chmod(), depending on whether we have
  		 * an fd.  Dirs get their perms set during the
  		 * post-extract fixup, which is handled elsewhere.
  		 */
  #ifdef HAVE_FCHMOD
  		if (a->fd >= 0) {
  			if (fchmod(a->fd, mode) != 0) {
  				archive_set_error(&a->archive, errno,
  				    "Can't set permissions to 0%o", (int)mode);
  				r = ARCHIVE_WARN;
  			}
  		} else
  #endif
  			/* If this platform lacks fchmod(), then
  			 * we'll just use chmod(). */
  			if (la_chmod(a->name, mode) != 0) {
  				archive_set_error(&a->archive, errno,
  				    "Can't set permissions to 0%o", (int)mode);
  				r = ARCHIVE_WARN;
  			}
  	}
  	return (r);
  }
  
  static int
  set_fflags(struct archive_write_disk *a)
  {
  	(void)a; /* UNUSED */
  	return (ARCHIVE_OK);
  }
  
  /* Default empty function body to satisfy mainline code. */
  static int
  set_acls(struct archive_write_disk *a, HANDLE h, const wchar_t *name,
  	 struct archive_acl *acl)
  {
  	(void)a; /* UNUSED */
  	(void)h; /* UNUSED */
  	(void)name; /* UNUSED */
  	(void)acl; /* UNUSED */
  	return (ARCHIVE_OK);
  }
  
  /*
   * Restore extended attributes - stub implementation for unsupported systems
   */
  static int
  set_xattrs(struct archive_write_disk *a)
  {
  	static int warning_done = 0;
  
  	/* If there aren't any extended attributes, then it's okay not
  	 * to extract them, otherwise, issue a single warning. */
  	if (archive_entry_xattr_count(a->entry) != 0 && !warning_done) {
  		warning_done = 1;
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
  		    "Cannot restore extended attributes on this system");
  		return (ARCHIVE_WARN);
  	}
  	/* Warning was already emitted; suppress further warnings. */
  	return (ARCHIVE_OK);
  }
  
  static void
  fileTimeToUtc(const FILETIME *filetime, time_t *t, long *ns)
  {
  	ULARGE_INTEGER utc;
  
  	utc.HighPart = filetime->dwHighDateTime;
  	utc.LowPart  = filetime->dwLowDateTime;
  	if (utc.QuadPart >= EPOC_TIME) {
  		utc.QuadPart -= EPOC_TIME;
  		/* milli seconds base */
  		*t = (time_t)(utc.QuadPart / 10000000);
  		/* nano seconds base */
  		*ns = (long)(utc.QuadPart % 10000000) * 100;
  	} else {
  		*t = 0;
  		*ns = 0;
  	}
  }
  /*
   * Test if file on disk is older than entry.
   */
  static int
  older(BY_HANDLE_FILE_INFORMATION *st, struct archive_entry *entry)
  {
  	time_t sec;
  	long nsec;
  
  	fileTimeToUtc(&st->ftLastWriteTime, &sec, &nsec);
  	/* First, test the seconds and return if we have a definite answer. */
  	/* Definitely older. */
  	if (sec < archive_entry_mtime(entry))
  		return (1);
  	/* Definitely younger. */
  	if (sec > archive_entry_mtime(entry))
  		return (0);
  	if (nsec < archive_entry_mtime_nsec(entry))
  		return (1);
  	/* Same age or newer, so not older. */
  	return (0);
  }
  
  #endif /* _WIN32 && !__CYGWIN__ */
  
  