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- /* Copyright (C) 1991, 1992, 1994 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, 1992 Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, 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 <fcntlbits.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 <fcntlbits.h>
-
- #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. */
-
-
- /* 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,...));
- extern int open __P ((__const char *__file, int __oflag,...));
-
- /* Create and open FILE, with mode MODE.
- This takes an `int' MODE argument because that is
- what `mode_t' will be widened to. */
- extern int creat __P ((__const char *__file, __mode_t __mode));
-
- #ifdef __OPTIMIZE__
- #define creat(file, m) __open((file), O_WRONLY|O_CREAT|O_TRUNC, (m))
- #endif /* Optimizing. */
-
- #if defined (__USE_MISC) && !defined (F_LOCK)
- /* 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. */
-
- extern int lockf __P ((int __fd, int __cmd, __off_t __len));
- #endif
-
- __END_DECLS
-
- #endif /* fcntl.h */
-