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. */
52 #ifdef __USE_LARGEFILE64
53 # define O_LARGEFILE 0
56 /* For now Linux has synchronisity options for data and read operations.
57 We define the symbols here but let them do the same as O_SYNC since
58 this is a superset. */
59 #if defined __USE_POSIX199309 || defined __USE_UNIX98
60 # define O_DSYNC O_SYNC /* Synchronize data. */
61 # define O_RSYNC O_SYNC /* Synchronize read operations. */
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 #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). */
75 #define F_GETLK64 5 /* Get record locking info. */
76 #define F_SETLK64 6 /* Set record locking info (non-blocking). */
77 #define F_SETLKW64 7 /* Set record locking info (blocking). */
80 # define F_SETOWN 8 /* Get owner of socket (receiver of SIGIO). */
81 # define F_GETOWN 9 /* Set owner of socket (receiver of SIGIO). */
85 # define F_SETSIG 10 /* Set number of signal to be sent. */
86 # define F_GETSIG 11 /* Get number of signal to be sent. */
90 # define F_SETLEASE 1024 /* Set a lease. */
91 # define F_GETLEASE 1025 /* Enquire what lease is active. */
92 # define F_NOTIFY 1026 /* Request notfications on a directory. */
93 # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with
94 close-on-exit set on new fd. */
97 /* For F_[GET|SET]FL. */
98 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */
100 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */
101 #define F_RDLCK 0 /* Read lock. */
102 #define F_WRLCK 1 /* Write lock. */
103 #define F_UNLCK 2 /* Remove lock. */
105 /* for old implementation of bsd flock () */
106 #define F_EXLCK 4 /* or 3 */
107 #define F_SHLCK 8 /* or 4 */
110 /* Operations for bsd flock(), also used by the kernel implementation */
111 # define LOCK_SH 1 /* shared lock */
112 # define LOCK_EX 2 /* exclusive lock */
113 # define LOCK_NB 4 /* or'd with one of the above to prevent
115 # define LOCK_UN 8 /* remove lock */
120 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
121 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
122 #ifndef __USE_FILE_OFFSET64
123 __off_t l_start; /* Offset where the lock begins. */
124 __off_t l_len; /* Size of the locked area; zero means until EOF. */
126 __off64_t l_start; /* Offset where the lock begins. */
127 __off64_t l_len; /* Size of the locked area; zero means until EOF. */
129 __pid_t l_pid; /* Process holding the lock. */
132 #ifdef __USE_LARGEFILE64
135 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
136 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
137 __off64_t l_start; /* Offset where the lock begins. */
138 __off64_t l_len; /* Size of the locked area; zero means until EOF. */
139 __pid_t l_pid; /* Process holding the lock. */
143 /* Define some more compatibility macros to be backward compatible with
144 BSD systems which did not managed to hide these kernel macros. */
146 # define FAPPEND O_APPEND
147 # define FFSYNC O_FSYNC
148 # define FASYNC O_ASYNC
149 # define FNONBLOCK O_NONBLOCK
150 # define FNDELAY O_NDELAY
151 #endif /* Use BSD. */
153 /* Advise to `posix_fadvise'. */
155 # define POSIX_FADV_NORMAL 0 /* No further special treatment. */
156 # define POSIX_FADV_RANDOM 1 /* Expect random page references. */
157 # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
158 # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
159 # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
160 # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
164 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
165 /* Flags for SYNC_FILE_RANGE. */
166 # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
167 in the range before performing the
169 # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
170 dirty pages in the range which are
171 not presently under writeback. */
172 # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in
173 the range after performing the
176 /* Flags for SPLICE and VMSPLICE. */
177 # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */
178 # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing
179 (but we may still block on the fd
180 we splice from/to). */
181 # define SPLICE_F_MORE 4 /* Expect more data. */
182 # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */
187 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
189 /* Provide kernel hint to read ahead. */
190 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
194 /* Selective file content synch'ing. */
195 extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
196 unsigned int __flags);
198 /* Splice address range into a pipe. */
199 extern ssize_t vmsplice (int __fdout, const struct iovec *__iov,
200 size_t __count, unsigned int __flags);
202 /* Splice two files together. */
203 extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout,
204 __off64_t *__offout, size_t __len,
205 unsigned int __flags);
207 /* In-kernel implementation of tee for pipe buffers. */
208 extern ssize_t tee (int __fdin, int __fdout, size_t __len,
209 unsigned int __flags);