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/* Copyright (C) 1991,1992,1994-2001,2003,2004,2005

   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.  */

#ifdef __USE_XOPEN

# include <sys/stat.h>

#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.  */

#ifdef __USE_XOPEN              /* <stdio.h> has the same definitions.  */

# 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 */

#if 0 /*def __USE_GNU*/

# define AT_FDCWD               -100    /* Special value used to indicate

                                           openat should use the current

                                           working directory. */

# define AT_SYMLINK_NOFOLLOW    0x100   /* Do not follow symbolic links.  */

# define AT_REMOVEDIR           0x200   /* Remove directory instead of

                                           unlinking file.  */

#endif

/* 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.  */

#ifndef __USE_FILE_OFFSET64

extern int fcntl (int __fd, int __cmd, ...);

#else

# ifdef __REDIRECT

extern int __REDIRECT (fcntl, (int __fd, int __cmd, ...), fcntl64);

# else

#  define fcntl fcntl64

# endif

#endif

#ifdef __USE_LARGEFILE64

extern int fcntl64 (int __fd, int __cmd, ...);

#endif

/* 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

#if 0 /*def __USE_GNU*/

/* 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

extern int openat64 (int __fd, __const char *__file, int __oflag, ...)

     __nonnull ((2));

#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

#endif

#if 0

/* FIXME -- uClibc should probably implement these... */

/* Reserve storage for the data of the file associated with FD.

   This function is a possible cancellation points 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

__END_DECLS

#endif /* fcntl.h  */