1 /* Copyright (C) 1991,1992,1994-2001,2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
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.
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 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 * POSIX Standard: 6.5 File Control Operations <fcntl.h>
28 /* This must be early so <bits/fcntl.h> can define types winningly. */
31 /* Get the definitions of O_*, F_*, FD_*: all the
32 numbers and flag bits for `open', `fcntl', et al. */
33 #include <bits/fcntl.h>
35 /* For XPG all symbols from <sys/stat.h> should also be available. */
37 # include <sys/stat.h>
41 # ifndef R_OK /* Verbatim from <unistd.h>. Ugh. */
42 /* Values for the second argument to access.
43 These may be OR'd together. */
44 # define R_OK 4 /* Test for read permission. */
45 # define W_OK 2 /* Test for write permission. */
46 # define X_OK 1 /* Test for execute permission. */
47 # define F_OK 0 /* Test for existence. */
49 #endif /* Use misc. */
51 /* XPG wants the following symbols. */
52 #ifdef __USE_XOPEN /* <stdio.h> has the same definitions. */
53 # define SEEK_SET 0 /* Seek from beginning of file. */
54 # define SEEK_CUR 1 /* Seek from current position. */
55 # define SEEK_END 2 /* Seek from end of file. */
58 /* Do the file control operation described by CMD on FD.
59 The remaining arguments are interpreted depending on CMD.
61 This function is a cancellation point and therefore not marked with
63 extern int fcntl (int __fd, int __cmd, ...);
65 /* Open FILE and return a new file descriptor for it, or -1 on error.
66 OFLAG determines the type of access used. If O_CREAT is on OFLAG,
67 the third argument is taken as a `mode_t', the mode of the created file.
69 This function is a cancellation point and therefore not marked with
71 #ifndef __USE_FILE_OFFSET64
72 extern int open (__const char *__file, int __oflag, ...);
75 extern int __REDIRECT (open, (__const char *__file, int __oflag, ...), open64);
80 #ifdef __USE_LARGEFILE64
81 extern int open64 (__const char *__file, int __oflag, ...);
84 /* Create and open FILE, with mode MODE. This takes an `int' MODE
85 argument because that is what `mode_t' will be widened to.
87 This function is a cancellation point and therefore not marked with
89 #ifndef __USE_FILE_OFFSET64
90 extern int creat (__const char *__file, __mode_t __mode);
93 extern int __REDIRECT (creat, (__const char *__file, __mode_t __mode),
96 # define creat creat64
99 #ifdef __USE_LARGEFILE64
100 extern int creat64 (__const char *__file, __mode_t __mode);
103 #if !defined F_LOCK && (defined __USE_MISC || (defined __USE_XOPEN_EXTENDED \
104 && !defined __USE_POSIX))
105 /* NOTE: These declarations also appear in <unistd.h>; be sure to keep both
106 files consistent. Some systems have them there and some here, and some
107 software depends on the macros being defined without including both. */
109 /* `lockf' is a simpler interface to the locking facilities of `fcntl'.
110 LEN is always relative to the current file position.
111 The CMD argument is one of the following. */
113 # define F_ULOCK 0 /* Unlock a previously locked region. */
114 # define F_LOCK 1 /* Lock a region for exclusive use. */
115 # define F_TLOCK 2 /* Test and lock a region for exclusive use. */
116 # define F_TEST 3 /* Test a region for other processes locks. */
118 # ifndef __USE_FILE_OFFSET64
119 extern int lockf (int __fd, int __cmd, __off_t __len) __THROW;
122 extern int __REDIRECT (lockf, (int __fd, int __cmd, __off64_t __len) __THROW,
125 # define lockf lockf64
128 # ifdef __USE_LARGEFILE64
129 extern int lockf64 (int __fd, int __cmd, __off64_t __len) __THROW;
134 /* Advice the system about the expected behaviour of the application with
135 respect to the file associated with FD. */
136 # ifndef __USE_FILE_OFFSET64
137 extern int posix_fadvise (int __fd, __off_t __offset, off_t __len,
138 int __advise) __THROW;
141 extern int __REDIRECT (posix_fadvise, (int __fd, __off64_t __offset,
142 off64_t __len, int __advise) __THROW,
145 # define posix_fadvise posix_fadvise64
148 # ifdef __USE_LARGEFILE64
149 extern int posix_fadvise64 (int __fd, __off64_t __offset, off64_t __len,
150 int __advise) __THROW;
154 /* Reserve storage for the data of the file associated with FD.
156 This function is a possible cancellation points and therefore not
157 marked with __THROW. */
158 # ifndef __USE_FILE_OFFSET64
159 extern int posix_fallocate (int __fd, __off_t __offset, size_t __len);
162 extern int __REDIRECT (posix_fallocate, (int __fd, __off64_t __offset,
166 # define posix_fallocate posix_fallocate64
169 # ifdef __USE_LARGEFILE64
170 extern int posix_fallocate64 (int __fd, __off64_t __offset, size_t __len);