text: /* Copyright (C) 1991,1992,1994-2001,2003,2004,2005,2006,2007,2009,2010,2011
  	Free Software Foundation, Inc.
     This file is part of the GNU C Library.
  
     The GNU C 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.
  
     The GNU C 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 the GNU C Library; if not, write to the Free
     Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
     02111-1307 USA.  */
  
  /*
   *	POSIX Standard: 6.5 File Control Operations	<fcntl.h>
   */
  
  #ifndef	_FCNTL_H
  #define	_FCNTL_H	1
  
  #include <features.h>
  
  /* This must be early so <bits/fcntl.h> can define types winningly.  */
  __BEGIN_DECLS
  
  /* Get the definitions of O_*, F_*, FD_*: all the
     numbers and flag bits for `open', `fcntl', et al.  */
  #include <bits/fcntl.h>
  
  /* For XPG all symbols from <sys/stat.h> should also be available.  */
  #if defined __USE_XOPEN || defined __USE_XOPEN2K8
  # include <bits/types.h>         /* For __mode_t and __dev_t.  */
  # define __need_timespec
  # include <time.h>
  # include <bits/stat.h>
  
  # define S_IFMT		__S_IFMT
  # define S_IFDIR	__S_IFDIR
  # define S_IFCHR	__S_IFCHR
  # define S_IFBLK	__S_IFBLK
  # define S_IFREG	__S_IFREG
  # ifdef __S_IFIFO
  #  define S_IFIFO	__S_IFIFO
  # endif
  # ifdef __S_IFLNK
  #  define S_IFLNK	__S_IFLNK
  # endif
  # if (defined __USE_UNIX98 || defined __USE_XOPEN2K8) && defined __S_IFSOCK
  #  define S_IFSOCK	__S_IFSOCK
  # endif
  
  /* Protection bits.  */
  
  # define S_ISUID	__S_ISUID       /* Set user ID on execution.  */
  # define S_ISGID	__S_ISGID       /* Set group ID on execution.  */
  
  # if defined __USE_BSD || defined __USE_MISC || defined __USE_XOPEN
  /* Save swapped text after use (sticky bit).  This is pretty well obsolete.  */
  #  define S_ISVTX	__S_ISVTX
  # endif
  
  # define S_IRUSR	__S_IREAD       /* Read by owner.  */
  # define S_IWUSR	__S_IWRITE      /* Write by owner.  */
  # define S_IXUSR	__S_IEXEC       /* Execute by owner.  */
  /* Read, write, and execute by owner.  */
  # define S_IRWXU	(__S_IREAD|__S_IWRITE|__S_IEXEC)
  
  # define S_IRGRP	(S_IRUSR >> 3)  /* Read by group.  */
  # define S_IWGRP	(S_IWUSR >> 3)  /* Write by group.  */
  # define S_IXGRP	(S_IXUSR >> 3)  /* Execute by group.  */
  /* Read, write, and execute by group.  */
  # define S_IRWXG	(S_IRWXU >> 3)
  
  # define S_IROTH	(S_IRGRP >> 3)  /* Read by others.  */
  # define S_IWOTH	(S_IWGRP >> 3)  /* Write by others.  */
  # define S_IXOTH	(S_IXGRP >> 3)  /* Execute by others.  */
  /* Read, write, and execute by others.  */
  # define S_IRWXO	(S_IRWXG >> 3)
  #endif
  
  #ifdef	__USE_MISC
  # ifndef R_OK			/* Verbatim from <unistd.h>.  Ugh.  */
  /* Values for the second argument to access.
     These may be OR'd together.  */
  #  define R_OK	4		/* Test for read permission.  */
  #  define W_OK	2		/* Test for write permission.  */
  #  define X_OK	1		/* Test for execute permission.  */
  #  define F_OK	0		/* Test for existence.  */
  # endif
  #endif /* Use misc.  */
  
  /* XPG wants the following symbols.   <stdio.h> has the same definitions.  */
  #if defined __USE_XOPEN || defined __USE_XOPEN2K8
  # define SEEK_SET	0	/* Seek from beginning of file.  */
  # define SEEK_CUR	1	/* Seek from current position.  */
  # define SEEK_END	2	/* Seek from end of file.  */
  #endif	/* XPG */
  
  /* Do the file control operation described by CMD on FD.
     The remaining arguments are interpreted depending on CMD.
  
     This function is a cancellation point and therefore not marked with
     __THROW.  */
  extern int fcntl (int __fd, int __cmd, ...);
  
  /* Open FILE and return a new file descriptor for it, or -1 on error.
     OFLAG determines the type of access used.  If O_CREAT is on OFLAG,
     the third argument is taken as a `mode_t', the mode of the created file.
  
     This function is a cancellation point and therefore not marked with
     __THROW.  */
  #ifndef __USE_FILE_OFFSET64
  extern int open (__const char *__file, int __oflag, ...) __nonnull ((1));
  #else
  # ifdef __REDIRECT
  extern int __REDIRECT (open, (__const char *__file, int __oflag, ...), open64)
       __nonnull ((1));
  # else
  #  define open open64
  # endif
  #endif
  #ifdef __USE_LARGEFILE64
  extern int open64 (__const char *__file, int __oflag, ...) __nonnull ((1));
  #endif
  
  #ifdef __USE_ATFILE
  /* Similar to `open' but a relative path name is interpreted relative to
     the directory for which FD is a descriptor.
  
     NOTE: some other `openat' implementation support additional functionality
     through this interface, especially using the O_XATTR flag.  This is not
     yet supported here.
  
     This function is a cancellation point and therefore not marked with
     __THROW.  */
  # ifndef __USE_FILE_OFFSET64
  extern int openat (int __fd, __const char *__file, int __oflag, ...)
       __nonnull ((2));
  # else
  #  ifdef __REDIRECT
  extern int __REDIRECT (openat, (int __fd, __const char *__file, int __oflag,
  				...), openat64) __nonnull ((2));
  #  else
  #   define openat openat64
  #  endif
  # endif
  # ifdef __USE_LARGEFILE64
  extern int openat64 (int __fd, __const char *__file, int __oflag, ...)
       __nonnull ((2));
  # endif
  #endif
  
  /* Create and open FILE, with mode MODE.  This takes an `int' MODE
     argument because that is what `mode_t' will be widened to.
  
     This function is a cancellation point and therefore not marked with
     __THROW.  */
  #ifndef __USE_FILE_OFFSET64
  extern int creat (__const char *__file, __mode_t __mode) __nonnull ((1));
  #else
  # ifdef __REDIRECT
  extern int __REDIRECT (creat, (__const char *__file, __mode_t __mode),
  		       creat64) __nonnull ((1));
  # else
  #  define creat creat64
  # endif
  #endif
  #ifdef __USE_LARGEFILE64
  extern int creat64 (__const char *__file, __mode_t __mode) __nonnull ((1));
  #endif
  
  #if !defined F_LOCK && (defined __USE_MISC || (defined __USE_XOPEN_EXTENDED \
  					       && !defined __USE_POSIX))
  /* NOTE: These declarations also appear in <unistd.h>; be sure to keep both
     files consistent.  Some systems have them there and some here, and some
     software depends on the macros being defined without including both.  */
  
  /* `lockf' is a simpler interface to the locking facilities of `fcntl'.
     LEN is always relative to the current file position.
     The CMD argument is one of the following.  */
  
  # define F_ULOCK 0	/* Unlock a previously locked region.  */
  # define F_LOCK  1	/* Lock a region for exclusive use.  */
  # define F_TLOCK 2	/* Test and lock a region for exclusive use.  */
  # define F_TEST  3	/* Test a region for other processes locks.  */
  
  # ifndef __USE_FILE_OFFSET64
  extern int lockf (int __fd, int __cmd, __off_t __len);
  # else
  #  ifdef __REDIRECT
  extern int __REDIRECT (lockf, (int __fd, int __cmd, __off64_t __len), lockf64);
  #  else
  #   define lockf lockf64
  #  endif
  # endif
  # ifdef __USE_LARGEFILE64
  extern int lockf64 (int __fd, int __cmd, __off64_t __len);
  # endif
  #endif
  
  #ifdef __USE_XOPEN2K
  /* Advice the system about the expected behaviour of the application with
     respect to the file associated with FD.  */
  # ifndef __USE_FILE_OFFSET64
  extern int posix_fadvise (int __fd, __off_t __offset, __off_t __len,
  			  int __advise) __THROW;
  # else
   # ifdef __REDIRECT_NTH
  extern int __REDIRECT_NTH (posix_fadvise, (int __fd, __off64_t __offset,
  					   __off64_t __len, int __advise),
  			   posix_fadvise64);
  #  else
  #   define posix_fadvise posix_fadvise64
  #  endif
  # endif
  # ifdef __USE_LARGEFILE64
  extern int posix_fadvise64 (int __fd, __off64_t __offset, __off64_t __len,
  			    int __advise) __THROW;
  # endif
  
  
  /* Reserve storage for the data of the file associated with FD.
  
     This function is a possible cancellation point and therefore not
     marked with __THROW.  */
  # ifndef __USE_FILE_OFFSET64
  extern int posix_fallocate (int __fd, __off_t __offset, __off_t __len);
  # else
   # ifdef __REDIRECT
  extern int __REDIRECT (posix_fallocate, (int __fd, __off64_t __offset,
  					 __off64_t __len),
  		       posix_fallocate64);
  #  else
  #   define posix_fallocate posix_fallocate64
  #  endif
  # endif
  # ifdef __USE_LARGEFILE64
  extern int posix_fallocate64 (int __fd, __off64_t __offset, __off64_t __len);
  # endif
  #endif
  
  
  /* Define some inlines helping to catch common problems.  */
  #if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline \
      && defined __va_arg_pack_len
  # include <bits/fcntl2.h>
  #endif
  
  __END_DECLS
  
  #endif /* fcntl.h  */
  