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131 lines
4.5 KiB
C
131 lines
4.5 KiB
C
/* Copyright (C) 1991,92,94,95,96,97,98,99 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/*
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* POSIX Standard: 6.5 File Control Operations <fcntl.h>
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*/
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#ifndef _FCNTL_H
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#define _FCNTL_H 1
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#include <features.h>
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/* This must be early so <bits/fcntl.h> can define types winningly. */
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__BEGIN_DECLS
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/* Get the definitions of O_*, F_*, FD_*: all the
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numbers and flag bits for `open', `fcntl', et al. */
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#include <bits/fcntl.h>
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/* For XPG all symbols from <sys/stat.h> should also be available. */
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#ifdef __USE_XOPEN
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# include <sys/stat.h>
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#endif
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#ifdef __USE_MISC
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# ifndef R_OK /* Verbatim from <unistd.h>. Ugh. */
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/* Values for the second argument to access.
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These may be OR'd together. */
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# define R_OK 4 /* Test for read permission. */
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# define W_OK 2 /* Test for write permission. */
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# define X_OK 1 /* Test for execute permission. */
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# define F_OK 0 /* Test for existence. */
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# endif
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#endif /* Use misc. */
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/* XPG wants the following symbols. */
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#ifdef __USE_XOPEN /* <stdio.h> has the same definitions. */
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# define SEEK_SET 0 /* Seek from beginning of file. */
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# define SEEK_CUR 1 /* Seek from current position. */
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# define SEEK_END 2 /* Seek from end of file. */
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#endif /* XPG */
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/* Do the file control operation described by CMD on FD.
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The remaining arguments are interpreted depending on CMD. */
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extern int __fcntl (int __fd, int __cmd, ...) __THROW;
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extern int fcntl (int __fd, int __cmd, ...) __THROW;
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/* Open FILE and return a new file descriptor for it, or -1 on error.
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OFLAG determines the type of access used. If O_CREAT is on OFLAG,
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the third argument is taken as a `mode_t', the mode of the created file. */
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extern int __open (__const char *__file, int __oflag, ...) __THROW;
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#ifndef __USE_FILE_OFFSET64
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extern int open (__const char *__file, int __oflag, ...) __THROW;
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#else
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# ifdef __REDIRECT
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extern int __REDIRECT (open, (__const char *__file, int __oflag, ...) __THROW,
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open64);
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# else
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# define open open64
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# endif
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#endif
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#ifdef __USE_LARGEFILE64
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extern int open64 (__const char *__file, int __oflag, ...) __THROW;
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#endif
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/* Create and open FILE, with mode MODE.
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This takes an `int' MODE argument because that is
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what `mode_t' will be widened to. */
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#ifndef __USE_FILE_OFFSET64
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extern int creat (__const char *__file, __mode_t __mode) __THROW;
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#else
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# ifdef __REDIRECT
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extern int __REDIRECT (creat, (__const char *__file, __mode_t __mode) __THROW,
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creat64);
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# else
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# define creat creat64
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# endif
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#endif
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#ifdef __USE_LARGEFILE64
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extern int creat64 (__const char *__file, __mode_t __mode) __THROW;
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#endif
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#if !defined F_LOCK && (defined __USE_MISC || (defined __USE_XOPEN_EXTENDED \
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&& !defined __USE_POSIX))
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/* NOTE: These declarations also appear in <unistd.h>; be sure to keep both
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files consistent. Some systems have them there and some here, and some
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software depends on the macros being defined without including both. */
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/* `lockf' is a simpler interface to the locking facilities of `fcntl'.
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LEN is always relative to the current file position.
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The CMD argument is one of the following. */
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# define F_ULOCK 0 /* Unlock a previously locked region. */
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# define F_LOCK 1 /* Lock a region for exclusive use. */
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# define F_TLOCK 2 /* Test and lock a region for exclusive use. */
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# define F_TEST 3 /* Test a region for other processes locks. */
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# ifndef __USE_FILE_OFFSET64
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extern int lockf (int __fd, int __cmd, __off_t __len) __THROW;
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# else
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# ifdef __REDIRECT
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extern int __REDIRECT (lockf, (int __fd, int __cmd, __off64_t __len) __THROW,
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lockf64);
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# else
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# define lockf lockf64
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# endif
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# endif
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# ifdef __USE_LARGEFILE64
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extern int lockf64 (int __fd, int __cmd, __off64_t __len) __THROW;
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# endif
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#endif
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__END_DECLS
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#endif /* fcntl.h */
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