1 /* O_*, F_*, FD_* bit values for Linux.
2 Copyright (C) 1995, 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
20 # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
24 #include <sys/types.h>
26 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files
27 located on an ext2 file system */
28 #define O_ACCMODE 0003
32 #define O_CREAT 0100 /* not fcntl */
33 #define O_EXCL 0200 /* not fcntl */
34 #define O_NOCTTY 0400 /* not fcntl */
35 #define O_TRUNC 01000 /* not fcntl */
36 #define O_APPEND 02000
37 #define O_NONBLOCK 04000
38 #define O_NDELAY O_NONBLOCK
40 #define O_FSYNC O_SYNC
41 #define O_ASYNC 020000
44 # define O_DIRECT 040000 /* Direct disk access. */
45 # define O_DIRECTORY 0200000 /* Must be a directory. */
46 # define O_NOFOLLOW 0400000 /* Do not follow links. */
47 # define O_NOATIME 01000000 /* don't set atime */
48 # define O_CLOEXEC 02000000 /* set close_on_exec */
51 /* For now Linux has synchronisity options for data and read operations.
52 We define the symbols here but let them do the same as O_SYNC since
53 this is a superset. */
54 #if defined __USE_POSIX199309 || defined __USE_UNIX98
55 # define O_DSYNC O_SYNC /* Synchronize data. */
56 # define O_RSYNC O_SYNC /* Synchronize read operations. */
59 #ifdef __USE_LARGEFILE64
60 # define O_LARGEFILE 0100000
63 /* Values for the second argument to `fcntl'. */
64 #define F_DUPFD 0 /* Duplicate file descriptor. */
65 #define F_GETFD 1 /* Get file descriptor flags. */
66 #define F_SETFD 2 /* Set file descriptor flags. */
67 #define F_GETFL 3 /* Get file status flags. */
68 #define F_SETFL 4 /* Set file status flags. */
69 #ifndef __USE_FILE_OFFSET64
70 # define F_GETLK 5 /* Get record locking info. */
71 # define F_SETLK 6 /* Set record locking info (non-blocking). */
72 # define F_SETLKW 7 /* Set record locking info (blocking). */
74 # define F_GETLK F_GETLK64 /* Get record locking info. */
75 # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/
76 # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */
78 #define F_GETLK64 12 /* Get record locking info. */
79 #define F_SETLK64 13 /* Set record locking info (non-blocking). */
80 #define F_SETLKW64 14 /* Set record locking info (blocking). */
82 #if defined __USE_BSD || defined __USE_XOPEN2K
83 # define F_SETOWN 8 /* Get owner of socket (receiver of SIGIO). */
84 # define F_GETOWN 9 /* Set owner of socket (receiver of SIGIO). */
88 # define F_SETSIG 10 /* Set number of signal to be sent. */
89 # define F_GETSIG 11 /* Get number of signal to be sent. */
93 # define F_SETLEASE 1024 /* Set a lease. */
94 # define F_GETLEASE 1025 /* Enquire what lease is active. */
95 # define F_NOTIFY 1026 /* Request notfications on a directory. */
96 # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with
97 close-on-exit set on new fd. */
100 /* For F_[GET|SET]FL. */
101 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */
103 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */
104 #define F_RDLCK 0 /* Read lock. */
105 #define F_WRLCK 1 /* Write lock. */
106 #define F_UNLCK 2 /* Remove lock. */
108 /* For old implementation of bsd flock(). */
109 #define F_EXLCK 4 /* or 3 */
110 #define F_SHLCK 8 /* or 4 */
113 /* Operations for bsd flock(), also used by the kernel implementation. */
114 # define LOCK_SH 1 /* shared lock */
115 # define LOCK_EX 2 /* exclusive lock */
116 # define LOCK_NB 4 /* or'd with one of the above to prevent
118 # define LOCK_UN 8 /* remove lock */
123 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
124 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
125 #ifndef __USE_FILE_OFFSET64
126 __off_t l_start; /* Offset where the lock begins. */
127 __off_t l_len; /* Size of the locked area; zero means until EOF. */
129 __off64_t l_start; /* Offset where the lock begins. */
130 __off64_t l_len; /* Size of the locked area; zero means until EOF. */
132 __pid_t l_pid; /* Process holding the lock. */
135 #ifdef __USE_LARGEFILE64
138 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
139 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
140 __off64_t l_start; /* Offset where the lock begins. */
141 __off64_t l_len; /* Size of the locked area; zero means until EOF. */
142 __pid_t l_pid; /* Process holding the lock. */
146 /* Define some more compatibility macros to be backward compatible with
147 BSD systems which did not managed to hide these kernel macros. */
149 # define FAPPEND O_APPEND
150 # define FFSYNC O_FSYNC
151 # define FASYNC O_ASYNC
152 # define FNONBLOCK O_NONBLOCK
153 # define FNDELAY O_NDELAY
154 #endif /* Use BSD. */
156 /* Advise to `posix_fadvise'. */
158 # define POSIX_FADV_NORMAL 0 /* No further special treatment. */
159 # define POSIX_FADV_RANDOM 1 /* Expect random page references. */
160 # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
161 # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
162 # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
163 # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
167 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
168 /* Flags for SYNC_FILE_RANGE. */
169 # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
170 in the range before performing the
172 # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
173 dirty pages in the range which are
174 not presently under writeback. */
175 # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in
176 the range after performing the
179 /* Flags for SPLICE and VMSPLICE. */
180 # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */
181 # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing
182 (but we may still block on the fd
183 we splice from/to). */
184 # define SPLICE_F_MORE 4 /* Expect more data. */
185 # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */
190 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
192 /* Provide kernel hint to read ahead. */
193 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
197 /* Selective file content synch'ing. */
198 extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
199 unsigned int __flags);
201 /* Splice address range into a pipe. */
202 extern ssize_t vmsplice (int __fdout, const struct iovec *__iov,
203 size_t __count, unsigned int __flags);
205 /* Splice two files together. */
206 extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout,
207 __off64_t *__offout, size_t __len,
208 unsigned int __flags);
210 /* In-kernel implementation of tee for pipe buffers. */
211 extern ssize_t tee (int __fdin, int __fdout, size_t __len,
212 unsigned int __flags);