1 /* O_*, F_*, FD_* bit values for Linux.
2 Copyright (C) 1995, 1996, 1997, 1998 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 Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 see <http://www.gnu.org/licenses/>. */
20 # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
24 #include <sys/types.h>
26 # include <bits/uio.h>
29 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files
30 located on an ext2 file system */
31 #define O_ACCMODE 0003
35 #define O_CREAT 0100 /* not fcntl */
36 #define O_EXCL 0200 /* not fcntl */
37 #define O_NOCTTY 0400 /* not fcntl */
38 #define O_TRUNC 01000 /* not fcntl */
39 #define O_APPEND 02000
40 #define O_NONBLOCK 04000
41 #define O_NDELAY O_NONBLOCK
43 #define O_FSYNC O_SYNC
44 #define O_ASYNC 020000
47 # define O_DIRECTORY 040000 /* Must be a directory. */
48 # define O_NOFOLLOW 0100000 /* Do not follow links. */
49 # define O_DIRECT 0200000 /* Direct disk access. */
52 /* For now Linux has synchronisity options for data and read operations.
53 We define the symbols here but let them do the same as O_SYNC since
54 this is a superset. */
55 #if defined __USE_POSIX199309 || defined __USE_UNIX98
56 # define O_DSYNC O_SYNC /* Synchronize data. */
57 # define O_RSYNC O_SYNC /* Synchronize read operations. */
60 #ifdef __USE_LARGEFILE64
61 # define O_LARGEFILE 0400000
64 /* Values for the second argument to `fcntl'. */
65 #define F_DUPFD 0 /* Duplicate file descriptor. */
66 #define F_GETFD 1 /* Get file descriptor flags. */
67 #define F_SETFD 2 /* Set file descriptor flags. */
68 #define F_GETFL 3 /* Get file status flags. */
69 #define F_SETFL 4 /* Set file status flags. */
70 #ifndef __USE_FILE_OFFSET64
71 # define F_GETLK 5 /* Get record locking info. */
72 # define F_SETLK 6 /* Set record locking info (non-blocking). */
73 # define F_SETLKW 7 /* Set record locking info (blocking). */
75 # define F_GETLK F_GETLK64 /* Get record locking info. */
76 # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/
77 # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */
79 #define F_GETLK64 12 /* Get record locking info. */
80 #define F_SETLK64 13 /* Set record locking info (non-blocking). */
81 #define F_SETLKW64 14 /* Set record locking info (blocking). */
83 #if defined __USE_BSD || defined __USE_XOPEN2K
84 # define F_SETOWN 8 /* Get owner of socket (receiver of SIGIO). */
85 # define F_GETOWN 9 /* Set owner of socket (receiver of SIGIO). */
89 # define F_SETSIG 10 /* Set number of signal to be sent. */
90 # define F_GETSIG 11 /* Get number of signal to be sent. */
94 # define F_SETLEASE 1024 /* Set a lease. */
95 # define F_GETLEASE 1025 /* Enquire what lease is active. */
96 # define F_NOTIFY 1026 /* Request notfications on a directory. */
97 # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with
98 close-on-exit set on new fd. */
101 /* For F_[GET|SET]FL. */
102 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */
104 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */
105 #define F_RDLCK 0 /* Read lock. */
106 #define F_WRLCK 1 /* Write lock. */
107 #define F_UNLCK 2 /* Remove lock. */
109 /* for old implementation of bsd flock () */
110 #define F_EXLCK 4 /* or 3 */
111 #define F_SHLCK 8 /* or 4 */
114 /* Operations for bsd flock(), also used by the kernel implementation */
115 # define LOCK_SH 1 /* shared lock */
116 # define LOCK_EX 2 /* exclusive lock */
117 # define LOCK_NB 4 /* or'd with one of the above to prevent
119 # define LOCK_UN 8 /* remove lock */
123 # define LOCK_MAND 32 /* This is a mandatory flock: */
124 # define LOCK_READ 64 /* ... which allows concurrent read operations. */
125 # define LOCK_WRITE 128 /* ... which allows concurrent write operations. */
126 # define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */
130 /* Types of directory notifications that may be requested with F_NOTIFY. */
131 # define DN_ACCESS 0x00000001 /* File accessed. */
132 # define DN_MODIFY 0x00000002 /* File modified. */
133 # define DN_CREATE 0x00000004 /* File created. */
134 # define DN_DELETE 0x00000008 /* File removed. */
135 # define DN_RENAME 0x00000010 /* File renamed. */
136 # define DN_ATTRIB 0x00000020 /* File changed attibutes. */
137 # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */
142 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
143 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
144 #ifndef __USE_FILE_OFFSET64
145 __off_t l_start; /* Offset where the lock begins. */
146 __off_t l_len; /* Size of the locked area; zero means until EOF. */
148 __off64_t l_start; /* Offset where the lock begins. */
149 __off64_t l_len; /* Size of the locked area; zero means until EOF. */
151 __pid_t l_pid; /* Process holding the lock. */
154 #ifdef __USE_LARGEFILE64
157 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
158 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
159 __off64_t l_start; /* Offset where the lock begins. */
160 __off64_t l_len; /* Size of the locked area; zero means until EOF. */
161 __pid_t l_pid; /* Process holding the lock. */
165 /* Define some more compatibility macros to be backward compatible with
166 BSD systems which did not managed to hide these kernel macros. */
168 # define FAPPEND O_APPEND
169 # define FFSYNC O_FSYNC
170 # define FASYNC O_ASYNC
171 # define FNONBLOCK O_NONBLOCK
172 # define FNDELAY O_NDELAY
173 #endif /* Use BSD. */
175 /* Advise to `posix_fadvise'. */
177 # define POSIX_FADV_NORMAL 0 /* No further special treatment. */
178 # define POSIX_FADV_RANDOM 1 /* Expect random page references. */
179 # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
180 # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
181 # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
182 # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
186 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
187 /* Flags for SYNC_FILE_RANGE. */
188 # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
189 in the range before performing the
191 # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
192 dirty pages in the range which are
193 not presently under writeback. */
194 # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in
195 the range after performing the
198 /* Flags for SPLICE and VMSPLICE. */
199 # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */
200 # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing
201 (but we may still block on the fd
202 we splice from/to). */
203 # define SPLICE_F_MORE 4 /* Expect more data. */
204 # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */
209 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
211 /* Provide kernel hint to read ahead. */
212 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
216 /* Selective file content synch'ing. */
217 extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
218 unsigned int __flags);
220 /* Splice address range into a pipe. */
221 extern ssize_t vmsplice (int __fdout, const struct iovec *__iov,
222 size_t __count, unsigned int __flags);
224 /* Splice two files together. */
225 extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout,
226 __off64_t *__offout, size_t __len,
227 unsigned int __flags);
229 /* In-kernel implementation of tee for pipe buffers. */
230 extern ssize_t tee (int __fdin, int __fdout, size_t __len,
231 unsigned int __flags);