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/* Copyright (C) 1991, 92, 94, 95, 96, 97, 98 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  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

/* are on unistd.h */
#if 0

#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.  */

#endif /* 0 */

/* 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 */

/* Do the file control operation described by CMD on FD.
   The remaining arguments are interpreted depending on CMD.  */
extern int __fcntl __P ((int __fd, int __cmd, ...));
extern int fcntl __P ((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.  */
extern int __open __P ((__const char *__file, int __oflag, ...));
#ifndef __USE_FILE_OFFSET64
extern int open __P ((__const char *__file, int __oflag, ...));
#else
# ifdef __REDIRECT
extern int __REDIRECT (open, __P ((__const char *__file, int __oflag, ...)),
                       open64);
# else
#  define open open64
# endif
#endif
#ifdef __USE_LARGEFILE64
extern int open64 __P ((__const char *__file, int __oflag, ...));
#endif

/* Create and open FILE, with mode MODE.
   This takes an `int' MODE argument because that is
   what `mode_t' will be widened to.  */
#ifndef __USE_FILE_OFFSET64
extern int creat __P ((__const char *__file, __mode_t __mode));
#else
# ifdef __REDIRECT
extern int __REDIRECT (creat, __P ((__const char *__file, __mode_t __mode)),
                       creat64);
# else
#  define creat creat64
# endif
#endif
#ifdef __USE_LARGEFILE64
extern int creat64 __P ((__const char *__file, __mode_t __mode));
#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 __P ((int __fd, int __cmd, __off_t __len));
# else
# ifdef __REDIRECT
extern int __REDIRECT (lockf, __P ((int __fd, int __cmd, __off64_t __len)),
                       lockf64);
# else
#  define lockf lockf64
# endif
# endif
# ifdef __USE_LARGEFILE64
extern int lockf64 __P ((int __fd, int __cmd, __off64_t __len));
# endif
#endif

__END_DECLS

#endif /* fcntl.h  */