[thirdparty/glibc.git] / io / fcntl.h

/* Copyright (C) 1991, 92, 94, 95, 96 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 <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));

#if !defined(F_LOCK) && (defined(__USE_MISC) || defined(__USE_XOPEN_EXTENDED))
/* 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  */
Commit	Line	Data
b0d20a87	1	/* Copyright (C) 1991, 92, 94, 95, 96 Free Software Foundation, Inc.
54d79e99	2	This file is part of the GNU C Library.
28f540f4	3
54d79e99 UD	4	The GNU C Library is free software; you can redistribute it and/or
	5	modify it under the terms of the GNU Library General Public License as
	6	published by the Free Software Foundation; either version 2 of the
	7	License, or (at your option) any later version.
28f540f4	8
54d79e99 UD	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	Library General Public License for more details.
28f540f4	13
54d79e99 UD	14	You should have received a copy of the GNU Library General Public
	15	License along with the GNU C Library; see the file COPYING.LIB. If not,
	16	write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	17	Boston, MA 02111-1307, USA. */
28f540f4 RM	18
	19	/*
	20	* POSIX Standard: 6.5 File Control Operations <fcntl.h>
	21	*/
	22
	23	#ifndef _FCNTL_H
	24
	25	#define _FCNTL_H 1
	26	#include <features.h>
	27
	28	/* This must be early so <fcntlbits.h> can define types winningly. */
	29	__BEGIN_DECLS
	30
	31	/* Get the definitions of O_, F_, FD_*: all the
	32	numbers and flag bits for `open', `fcntl', et al. */
	33	#include <fcntlbits.h>
	34
	35	#ifdef __USE_MISC
	36	#ifndef R_OK /* Verbatim from <unistd.h>. Ugh. */
	37	/* Values for the second argument to access.
	38	These may be OR'd together. */
	39	#define R_OK 4 /* Test for read permission. */
	40	#define W_OK 2 /* Test for write permission. */
	41	#define X_OK 1 /* Test for execute permission. */
	42	#define F_OK 0 /* Test for existence. */
	43	#endif
	44	#endif /* Use misc. */
	45
28f540f4 RM	46	/* Do the file control operation described by CMD on FD.
	47	The remaining arguments are interpreted depending on CMD. */
	48	extern int __fcntl __P ((int __fd, int __cmd, ...));
	49	extern int fcntl __P ((int __fd, int __cmd, ...));
	50
	51	/* Open FILE and return a new file descriptor for it, or -1 on error.
	52	OFLAG determines the type of access used. If O_CREAT is on OFLAG,
	53	the third argument is taken as a `mode_t', the mode of the created file. */
23396375 UD	54	extern int __open __P ((__const char *__file, int __oflag, ...));
23396375 UD	55	extern int open __P ((__const char *__file, int __oflag, ...));
28f540f4 RM	56
	57	/* Create and open FILE, with mode MODE.
	58	This takes an `int' MODE argument because that is
	59	what `mode_t' will be widened to. */
	60	extern int creat __P ((__const char *__file, __mode_t __mode));
	61
54d79e99	62	#if !defined(F_LOCK) && (defined(__USE_MISC) \|\| defined(__USE_XOPEN_EXTENDED))
28f540f4 RM	63	/* NOTE: These declarations also appear in <unistd.h>; be sure to keep both
	64	files consistent. Some systems have them there and some here, and some
	65	software depends on the macros being defined without including both. */
	66
	67	/* `lockf' is a simpler interface to the locking facilities of `fcntl'.
	68	LEN is always relative to the current file position.
	69	The CMD argument is one of the following. */
	70
	71	#define F_ULOCK 0 /* Unlock a previously locked region. */
b0d20a87	72	#define F_LOCK 1 /* Lock a region for exclusive use. */
28f540f4 RM	73	#define F_TLOCK 2 /* Test and lock a region for exclusive use. */
	74	#define F_TEST 3 /* Test a region for other processes locks. */
	75
	76	extern int lockf __P ((int __fd, int __cmd, __off_t __len));
	77	#endif
	78
	79	__END_DECLS
	80
	81	#endif /* fcntl.h */