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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
#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 */
/* 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, mode_t mode));
#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 */
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