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

/* Copyright (C) 1991-2018 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 Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

/*
 *	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 __mode_t, __dev_t and __off_t  .*/
#include <bits/types.h>

/* Get the definitions of O_*, F_*, FD_*: all the
   numbers and flag bits for `open', `fcntl', et al.  */
#include <bits/fcntl.h>

/* Detect if open needs mode as a third argument (or for openat as a fourth
   argument).  */
#ifdef __O_TMPFILE
# define __OPEN_NEEDS_MODE(oflag) \
  (((oflag) & O_CREAT) != 0 || ((oflag) & __O_TMPFILE) == __O_TMPFILE)
#else
# define __OPEN_NEEDS_MODE(oflag) (((oflag) & O_CREAT) != 0)
#endif

/* POSIX.1-2001 specifies that these types are defined by <fcntl.h>.
   Earlier POSIX standards permitted any type ending in `_t' to be defined
   by any POSIX header, so we don't conditionalize the definitions here.  */
#ifndef __mode_t_defined
typedef __mode_t mode_t;
# define __mode_t_defined
#endif

#ifndef __off_t_defined
# ifndef __USE_FILE_OFFSET64
typedef __off_t off_t;
# else
typedef __off64_t off_t;
# endif
# define __off_t_defined
#endif

#if defined __USE_LARGEFILE64 && !defined __off64_t_defined
typedef __off64_t off64_t;
# define __off64_t_defined
#endif

#ifndef __pid_t_defined
typedef __pid_t pid_t;
# define __pid_t_defined
#endif

/* For XPG all symbols from <sys/stat.h> should also be available.  */
#ifdef __USE_XOPEN2K8
# include <bits/types/struct_timespec.h>
#endif
#if defined __USE_XOPEN || defined __USE_XOPEN2K8
# include <bits/stat.h>

# define S_IFMT		__S_IFMT
# define S_IFDIR	__S_IFDIR
# define S_IFCHR	__S_IFCHR
# define S_IFBLK	__S_IFBLK
# define S_IFREG	__S_IFREG
# ifdef __S_IFIFO
#  define S_IFIFO	__S_IFIFO
# endif
# ifdef __S_IFLNK
#  define S_IFLNK	__S_IFLNK
# endif
# if (defined __USE_UNIX98 || defined __USE_XOPEN2K8) && defined __S_IFSOCK
#  define S_IFSOCK	__S_IFSOCK
# endif

/* Protection bits.  */

# define S_ISUID	__S_ISUID       /* Set user ID on execution.  */
# define S_ISGID	__S_ISGID       /* Set group ID on execution.  */

# if defined __USE_MISC || defined __USE_XOPEN
/* Save swapped text after use (sticky bit).  This is pretty well obsolete.  */
#  define S_ISVTX	__S_ISVTX
# endif

# define S_IRUSR	__S_IREAD       /* Read by owner.  */
# define S_IWUSR	__S_IWRITE      /* Write by owner.  */
# define S_IXUSR	__S_IEXEC       /* Execute by owner.  */
/* Read, write, and execute by owner.  */
# define S_IRWXU	(__S_IREAD|__S_IWRITE|__S_IEXEC)

# define S_IRGRP	(S_IRUSR >> 3)  /* Read by group.  */
# define S_IWGRP	(S_IWUSR >> 3)  /* Write by group.  */
# define S_IXGRP	(S_IXUSR >> 3)  /* Execute by group.  */
/* Read, write, and execute by group.  */
# define S_IRWXG	(S_IRWXU >> 3)

# define S_IROTH	(S_IRGRP >> 3)  /* Read by others.  */
# define S_IWOTH	(S_IWGRP >> 3)  /* Write by others.  */
# define S_IXOTH	(S_IXGRP >> 3)  /* Execute by others.  */
/* Read, write, and execute by others.  */
# define S_IRWXO	(S_IRWXG >> 3)
#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.   <stdio.h> has the same definitions.  */
#if defined __USE_XOPEN || defined __USE_XOPEN2K8
# 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 */

/* The constants AT_REMOVEDIR and AT_EACCESS have the same value.  AT_EASSESS
   is meaningful only to faccessat, while AT_REMOVEDIR is meaningful only to
   unlinkat.  The two functions do completely different things and therefore,
   the flags can be allowed to overlap.  For example, passing AT_REMOVEDIR to
   faccessat would be undefined behavior and thus treating it equivalent to
   AT_EACCESS is valid undefined behavior.  */
#ifdef __USE_ATFILE
# define AT_FDCWD		-100	/* Special value used to indicate
					   the *at functions should use the
					   current working directory. */
# define AT_SYMLINK_NOFOLLOW	0x100	/* Do not follow symbolic links.  */
# define AT_REMOVEDIR		0x200	/* Remove directory instead of
					   unlinking file.  */
# define AT_SYMLINK_FOLLOW	0x400	/* Follow symbolic links.  */
# ifdef __USE_GNU
#  define AT_NO_AUTOMOUNT	0x800	/* Suppress terminal automount
					   traversal.  */
#  define AT_EMPTY_PATH		0x1000	/* Allow empty relative pathname.  */
# endif
# define AT_EACCESS		0x200	/* Test access permitted for
					   effective IDs, not real IDs.  */
#endif

/* Do the file control operation described by CMD on FD.
   The remaining arguments are interpreted depending on CMD.

   This function is a cancellation point and therefore not marked with
   __THROW.  */
extern int fcntl (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 or O_TMPFILE is set
   in OFLAG, the third argument is taken as a `mode_t', the mode of the
   created file.

   This function is a cancellation point and therefore not marked with
   __THROW.  */
#ifndef __USE_FILE_OFFSET64
extern int open (const char *__file, int __oflag, ...) __nonnull ((1));
#else
# ifdef __REDIRECT
extern int __REDIRECT (open, (const char *__file, int __oflag, ...), open64)
     __nonnull ((1));
# else
#  define open open64
# endif
#endif
#ifdef __USE_LARGEFILE64
extern int open64 (const char *__file, int __oflag, ...) __nonnull ((1));
#endif

#ifdef __USE_ATFILE
/* Similar to `open' but a relative path name is interpreted relative to
   the directory for which FD is a descriptor.

   NOTE: some other `openat' implementation support additional functionality
   through this interface, especially using the O_XATTR flag.  This is not
   yet supported here.

   This function is a cancellation point and therefore not marked with
   __THROW.  */
# ifndef __USE_FILE_OFFSET64
extern int openat (int __fd, const char *__file, int __oflag, ...)
     __nonnull ((2));
# else
#  ifdef __REDIRECT
extern int __REDIRECT (openat, (int __fd, const char *__file, int __oflag,
				...), openat64) __nonnull ((2));
#  else
#   define openat openat64
#  endif
# endif
# ifdef __USE_LARGEFILE64
extern int openat64 (int __fd, const char *__file, int __oflag, ...)
     __nonnull ((2));
# endif
#endif

/* Create and open FILE, with mode MODE.  This takes an `int' MODE
   argument because that is what `mode_t' will be widened to.

   This function is a cancellation point and therefore not marked with
   __THROW.  */
#ifndef __USE_FILE_OFFSET64
extern int creat (const char *__file, mode_t __mode) __nonnull ((1));
#else
# ifdef __REDIRECT
extern int __REDIRECT (creat, (const char *__file, mode_t __mode),
		       creat64) __nonnull ((1));
# else
#  define creat creat64
# endif
#endif
#ifdef __USE_LARGEFILE64
extern int creat64 (const char *__file, mode_t __mode) __nonnull ((1));
#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 (int __fd, int __cmd, off_t __len);
# else
#  ifdef __REDIRECT
extern int __REDIRECT (lockf, (int __fd, int __cmd, __off64_t __len), lockf64);
#  else
#   define lockf lockf64
#  endif
# endif
# ifdef __USE_LARGEFILE64
extern int lockf64 (int __fd, int __cmd, off64_t __len);
# endif
#endif

#ifdef __USE_XOPEN2K
/* Advice the system about the expected behaviour of the application with
   respect to the file associated with FD.  */
# ifndef __USE_FILE_OFFSET64
extern int posix_fadvise (int __fd, off_t __offset, off_t __len,
			  int __advise) __THROW;
# else
 # ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (posix_fadvise, (int __fd, __off64_t __offset,
					   __off64_t __len, int __advise),
			   posix_fadvise64);
#  else
#   define posix_fadvise posix_fadvise64
#  endif
# endif
# ifdef __USE_LARGEFILE64
extern int posix_fadvise64 (int __fd, off64_t __offset, off64_t __len,
			    int __advise) __THROW;
# endif


/* Reserve storage for the data of the file associated with FD.

   This function is a possible cancellation point and therefore not
   marked with __THROW.  */
# ifndef __USE_FILE_OFFSET64
extern int posix_fallocate (int __fd, off_t __offset, off_t __len);
# else
 # ifdef __REDIRECT
extern int __REDIRECT (posix_fallocate, (int __fd, __off64_t __offset,
					 __off64_t __len),
		       posix_fallocate64);
#  else
#   define posix_fallocate posix_fallocate64
#  endif
# endif
# ifdef __USE_LARGEFILE64
extern int posix_fallocate64 (int __fd, off64_t __offset, off64_t __len);
# endif
#endif


/* Define some inlines helping to catch common problems.  */
#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function \
    && defined __va_arg_pack_len
# include <bits/fcntl2.h>
#endif

__END_DECLS

#endif /* fcntl.h  */
Commit	Line	Data
688903eb	1	/* Copyright (C) 1991-2018 Free Software Foundation, Inc.
54d79e99	2	This file is part of the GNU C Library.
28f540f4	3
54d79e99	4	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	5	modify it under the terms of the GNU Lesser General Public
	6	License as published by the Free Software Foundation; either
	7	version 2.1 of the 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
41bdb6e2	12	Lesser General Public License for more details.
28f540f4	13
41bdb6e2	14	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	15	License along with the GNU C Library; if not, see
59ba27a6 PE	16	<http://www.gnu.org/licenses/>. */
28f540f4 RM	17
	18	/*
	19	* POSIX Standard: 6.5 File Control Operations <fcntl.h>
	20	*/
	21
	22	#ifndef _FCNTL_H
28f540f4	23	#define _FCNTL_H 1
5107cf1d	24
28f540f4 RM	25	#include <features.h>
28f540f4 RM	26
5107cf1d	27	/* This must be early so <bits/fcntl.h> can define types winningly. */
28f540f4 RM	28	__BEGIN_DECLS
28f540f4 RM	29
ac5c94d3 RM	30	/* Get __mode_t, __dev_t and __off_t .*/
	31	#include <bits/types.h>
	32
28f540f4 RM	33	/* Get the definitions of O_, F_, FD_*: all the
28f540f4 RM	34	numbers and flag bits for `open', `fcntl', et al. */
5107cf1d	35	#include <bits/fcntl.h>
28f540f4	36
65f6f938 ER	37	/* Detect if open needs mode as a third argument (or for openat as a fourth
	38	argument). */
	39	#ifdef __O_TMPFILE
	40	# define __OPEN_NEEDS_MODE(oflag) \
	41	(((oflag) & O_CREAT) != 0 \|\| ((oflag) & __O_TMPFILE) == __O_TMPFILE)
	42	#else
	43	# define __OPEN_NEEDS_MODE(oflag) (((oflag) & O_CREAT) != 0)
	44	#endif
	45
3a8db22f AJ	46	/* POSIX.1-2001 specifies that these types are defined by <fcntl.h>.
	47	Earlier POSIX standards permitted any type ending in `_t' to be defined
	48	by any POSIX header, so we don't conditionalize the definitions here. */
	49	#ifndef __mode_t_defined
f42d41d1	50	typedef __mode_t mode_t;
3a8db22f AJ	51	# define __mode_t_defined
3a8db22f AJ	52	#endif
f42d41d1	53
3a8db22f AJ	54	#ifndef __off_t_defined
3a8db22f AJ	55	# ifndef __USE_FILE_OFFSET64
f42d41d1	56	typedef __off_t off_t;
3a8db22f	57	# else
f42d41d1	58	typedef __off64_t off_t;
f42d41d1	59	# endif
3a8db22f AJ	60	# define __off_t_defined
	61	#endif
	62
	63	#if defined __USE_LARGEFILE64 && !defined __off64_t_defined
	64	typedef __off64_t off64_t;
	65	# define __off64_t_defined
	66	#endif
f42d41d1	67
3a8db22f	68	#ifndef __pid_t_defined
f42d41d1	69	typedef __pid_t pid_t;
3a8db22f AJ	70	# define __pid_t_defined
3a8db22f AJ	71	#endif
f42d41d1	72
6077fe6e	73	/* For XPG all symbols from <sys/stat.h> should also be available. */
35281b18	74	#ifdef __USE_XOPEN2K8
05b68e14	75	# include <bits/types/struct_timespec.h>
35281b18 JM	76	#endif
35281b18 JM	77	#if defined __USE_XOPEN \|\| defined __USE_XOPEN2K8
f095bb72 UD	78	# include <bits/stat.h>
	79
	80	# define S_IFMT __S_IFMT
	81	# define S_IFDIR __S_IFDIR
	82	# define S_IFCHR __S_IFCHR
	83	# define S_IFBLK __S_IFBLK
	84	# define S_IFREG __S_IFREG
	85	# ifdef __S_IFIFO
	86	# define S_IFIFO __S_IFIFO
	87	# endif
	88	# ifdef __S_IFLNK
	89	# define S_IFLNK __S_IFLNK
	90	# endif
	91	# if (defined __USE_UNIX98 \|\| defined __USE_XOPEN2K8) && defined __S_IFSOCK
	92	# define S_IFSOCK __S_IFSOCK
	93	# endif
	94
	95	/* Protection bits. */
	96
	97	# define S_ISUID __S_ISUID /* Set user ID on execution. */
	98	# define S_ISGID __S_ISGID /* Set group ID on execution. */
	99
ed9a38e2	100	# if defined __USE_MISC \|\| defined __USE_XOPEN
f095bb72 UD	101	/* Save swapped text after use (sticky bit). This is pretty well obsolete. */
	102	# define S_ISVTX __S_ISVTX
	103	# endif
	104
	105	# define S_IRUSR __S_IREAD /* Read by owner. */
	106	# define S_IWUSR __S_IWRITE /* Write by owner. */
	107	# define S_IXUSR __S_IEXEC /* Execute by owner. */
	108	/* Read, write, and execute by owner. */
	109	# define S_IRWXU (__S_IREAD\|__S_IWRITE\|__S_IEXEC)
	110
	111	# define S_IRGRP (S_IRUSR >> 3) /* Read by group. */
	112	# define S_IWGRP (S_IWUSR >> 3) /* Write by group. */
	113	# define S_IXGRP (S_IXUSR >> 3) /* Execute by group. */
	114	/* Read, write, and execute by group. */
	115	# define S_IRWXG (S_IRWXU >> 3)
	116
	117	# define S_IROTH (S_IRGRP >> 3) /* Read by others. */
	118	# define S_IWOTH (S_IWGRP >> 3) /* Write by others. */
	119	# define S_IXOTH (S_IXGRP >> 3) /* Execute by others. */
	120	/* Read, write, and execute by others. */
	121	# define S_IRWXO (S_IRWXG >> 3)
9756dfe1 UD	122	#endif
9756dfe1 UD	123
28f540f4	124	#ifdef __USE_MISC
dfd2257a	125	# ifndef R_OK /* Verbatim from <unistd.h>. Ugh. */
28f540f4 RM	126	/* Values for the second argument to access.
28f540f4 RM	127	These may be OR'd together. */
dfd2257a UD	128	# define R_OK 4 /* Test for read permission. */
	129	# define W_OK 2 /* Test for write permission. */
	130	# define X_OK 1 /* Test for execute permission. */
	131	# define F_OK 0 /* Test for existence. */
	132	# endif
28f540f4 RM	133	#endif /* Use misc. */
28f540f4 RM	134
f095bb72 UD	135	/* XPG wants the following symbols. <stdio.h> has the same definitions. */
f095bb72 UD	136	#if defined __USE_XOPEN \|\| defined __USE_XOPEN2K8
4bae5567 UD	137	# define SEEK_SET 0 /* Seek from beginning of file. */
	138	# define SEEK_CUR 1 /* Seek from current position. */
	139	# define SEEK_END 2 /* Seek from end of file. */
	140	#endif /* XPG */
	141
39120df9 PF	142	/* The constants AT_REMOVEDIR and AT_EACCESS have the same value. AT_EASSESS
	143	is meaningful only to faccessat, while AT_REMOVEDIR is meaningful only to
	144	unlinkat. The two functions do completely different things and therefore,
	145	the flags can be allowed to overlap. For example, passing AT_REMOVEDIR to
	146	faccessat would be undefined behavior and thus treating it equivalent to
	147	AT_EACCESS is valid undefined behavior. */
0b8f25bb	148	#ifdef __USE_ATFILE
26cec518	149	# define AT_FDCWD -100 /* Special value used to indicate
c804fb5f UD	150	the *at functions should use the
c804fb5f UD	151	current working directory. */
26cec518 UD	152	# define AT_SYMLINK_NOFOLLOW 0x100 /* Do not follow symbolic links. */
	153	# define AT_REMOVEDIR 0x200 /* Remove directory instead of
	154	unlinking file. */
c804fb5f	155	# define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic links. */
d94a4670 UD	156	# ifdef __USE_GNU
d94a4670 UD	157	# define AT_NO_AUTOMOUNT 0x800 /* Suppress terminal automount
620a0529	158	traversal. */
d94a4670 UD	159	# define AT_EMPTY_PATH 0x1000 /* Allow empty relative pathname. */
d94a4670 UD	160	# endif
d15b99ac RM	161	# define AT_EACCESS 0x200 /* Test access permitted for
d15b99ac RM	162	effective IDs, not real IDs. */
26cec518 UD	163	#endif
26cec518 UD	164
28f540f4	165	/* Do the file control operation described by CMD on FD.
2c008571 UD	166	The remaining arguments are interpreted depending on CMD.
	167
	168	This function is a cancellation point and therefore not marked with
	169	__THROW. */
	170	extern int fcntl (int __fd, int __cmd, ...);
28f540f4 RM	171
28f540f4 RM	172	/* Open FILE and return a new file descriptor for it, or -1 on error.
65f6f938 ER	173	OFLAG determines the type of access used. If O_CREAT or O_TMPFILE is set
	174	in OFLAG, the third argument is taken as a `mode_t', the mode of the
	175	created file.
2c008571 UD	176
	177	This function is a cancellation point and therefore not marked with
	178	__THROW. */
dfd2257a	179	#ifndef __USE_FILE_OFFSET64
a784e502	180	extern int open (const char *__file, int __oflag, ...) __nonnull ((1));
dfd2257a	181	#else
918b9d72	182	# ifdef __REDIRECT
a784e502	183	extern int __REDIRECT (open, (const char *__file, int __oflag, ...), open64)
8a1f658b	184	__nonnull ((1));
918b9d72 UD	185	# else
	186	# define open open64
	187	# endif
dfd2257a UD	188	#endif
dfd2257a UD	189	#ifdef __USE_LARGEFILE64
a784e502	190	extern int open64 (const char *__file, int __oflag, ...) __nonnull ((1));
dfd2257a	191	#endif
28f540f4	192
0b8f25bb RM	193	#ifdef __USE_ATFILE
0b8f25bb RM	194	/* Similar to `open' but a relative path name is interpreted relative to
4973cbe5 UD	195	the directory for which FD is a descriptor.
4973cbe5 UD	196
0b8f25bb	197	NOTE: some other `openat' implementation support additional functionality
4973cbe5 UD	198	through this interface, especially using the O_XATTR flag. This is not
	199	yet supported here.
	200
	201	This function is a cancellation point and therefore not marked with
	202	__THROW. */
	203	# ifndef __USE_FILE_OFFSET64
a784e502	204	extern int openat (int __fd, const char *__file, int __oflag, ...)
4973cbe5 UD	205	__nonnull ((2));
	206	# else
	207	# ifdef __REDIRECT
a784e502	208	extern int __REDIRECT (openat, (int __fd, const char *__file, int __oflag,
4973cbe5 UD	209	...), openat64) __nonnull ((2));
	210	# else
	211	# define openat openat64
	212	# endif
	213	# endif
f095bb72	214	# ifdef __USE_LARGEFILE64
a784e502	215	extern int openat64 (int __fd, const char *__file, int __oflag, ...)
4973cbe5	216	__nonnull ((2));
f095bb72	217	# endif
4973cbe5 UD	218	#endif
4973cbe5 UD	219
2c008571 UD	220	/* Create and open FILE, with mode MODE. This takes an `int' MODE
	221	argument because that is what `mode_t' will be widened to.
	222
	223	This function is a cancellation point and therefore not marked with
	224	__THROW. */
dfd2257a	225	#ifndef __USE_FILE_OFFSET64
3a8db22f	226	extern int creat (const char *__file, mode_t __mode) __nonnull ((1));
dfd2257a	227	#else
918b9d72	228	# ifdef __REDIRECT
3a8db22f	229	extern int __REDIRECT (creat, (const char *__file, mode_t __mode),
8a1f658b	230	creat64) __nonnull ((1));
918b9d72 UD	231	# else
	232	# define creat creat64
	233	# endif
dfd2257a UD	234	#endif
dfd2257a UD	235	#ifdef __USE_LARGEFILE64
3a8db22f	236	extern int creat64 (const char *__file, mode_t __mode) __nonnull ((1));
dfd2257a	237	#endif
28f540f4	238
9756dfe1 UD	239	#if !defined F_LOCK && (defined __USE_MISC \|\| (defined __USE_XOPEN_EXTENDED \
9756dfe1 UD	240	&& !defined __USE_POSIX))
28f540f4 RM	241	/* NOTE: These declarations also appear in <unistd.h>; be sure to keep both
	242	files consistent. Some systems have them there and some here, and some
	243	software depends on the macros being defined without including both. */
	244
	245	/* `lockf' is a simpler interface to the locking facilities of `fcntl'.
	246	LEN is always relative to the current file position.
	247	The CMD argument is one of the following. */
	248
dfd2257a UD	249	# define F_ULOCK 0 /* Unlock a previously locked region. */
	250	# define F_LOCK 1 /* Lock a region for exclusive use. */
	251	# define F_TLOCK 2 /* Test and lock a region for exclusive use. */
	252	# define F_TEST 3 /* Test a region for other processes locks. */
28f540f4	253
dfd2257a	254	# ifndef __USE_FILE_OFFSET64
3a8db22f	255	extern int lockf (int __fd, int __cmd, off_t __len);
dfd2257a	256	# else
b6a2b287	257	# ifdef __REDIRECT
8dab36a1	258	extern int __REDIRECT (lockf, (int __fd, int __cmd, __off64_t __len), lockf64);
b6a2b287 UD	259	# else
	260	# define lockf lockf64
	261	# endif
dfd2257a UD	262	# endif
dfd2257a UD	263	# ifdef __USE_LARGEFILE64
3a8db22f	264	extern int lockf64 (int __fd, int __cmd, off64_t __len);
dfd2257a	265	# endif
28f540f4 RM	266	#endif
28f540f4 RM	267
bb8e0116 UD	268	#ifdef __USE_XOPEN2K
	269	/* Advice the system about the expected behaviour of the application with
	270	respect to the file associated with FD. */
	271	# ifndef __USE_FILE_OFFSET64
3a8db22f	272	extern int posix_fadvise (int __fd, off_t __offset, off_t __len,
bb8e0116 UD	273	int __advise) __THROW;
bb8e0116 UD	274	# else
b6a2b287	275	# ifdef __REDIRECT_NTH
f377d022 UD	276	extern int __REDIRECT_NTH (posix_fadvise, (int __fd, __off64_t __offset,
	277	__off64_t __len, int __advise),
	278	posix_fadvise64);
b6a2b287 UD	279	# else
	280	# define posix_fadvise posix_fadvise64
	281	# endif
bb8e0116 UD	282	# endif
bb8e0116 UD	283	# ifdef __USE_LARGEFILE64
3a8db22f	284	extern int posix_fadvise64 (int __fd, off64_t __offset, off64_t __len,
bb8e0116 UD	285	int __advise) __THROW;
	286	# endif
	287
	288
73299943 UD	289	/* Reserve storage for the data of the file associated with FD.
73299943 UD	290
4c1423ed	291	This function is a possible cancellation point and therefore not
73299943	292	marked with __THROW. */
bb8e0116	293	# ifndef __USE_FILE_OFFSET64
3a8db22f	294	extern int posix_fallocate (int __fd, off_t __offset, off_t __len);
bb8e0116	295	# else
b6a2b287	296	# ifdef __REDIRECT
bb8e0116	297	extern int __REDIRECT (posix_fallocate, (int __fd, __off64_t __offset,
089d05d5	298	__off64_t __len),
bb8e0116	299	posix_fallocate64);
b6a2b287 UD	300	# else
	301	# define posix_fallocate posix_fallocate64
	302	# endif
bb8e0116 UD	303	# endif
bb8e0116 UD	304	# ifdef __USE_LARGEFILE64
3a8db22f	305	extern int posix_fallocate64 (int __fd, off64_t __offset, off64_t __len);
bb8e0116 UD	306	# endif
	307	#endif
	308
ddfd0535	309
3a50811c	310	/* Define some inlines helping to catch common problems. */
5ac3ea17	311	#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function \
3a50811c	312	&& defined __va_arg_pack_len
ddfd0535 UD	313	# include <bits/fcntl2.h>
	314	#endif
	315
28f540f4 RM	316	__END_DECLS
	317
	318	#endif /* fcntl.h */