1 /* O_*, F_*, FD_* bit values for Linux.
2 Copyright (C) 2000,2001,2002,2004,2006,2007,2009 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, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
24 #include <sys/types.h>
25 #include <bits/wordsize.h>
27 # include <bits/uio.h>
31 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files
32 located on an ext2 file system */
33 #define O_ACCMODE 0003
37 #define O_CREAT 0100 /* not fcntl */
38 #define O_EXCL 0200 /* not fcntl */
39 #define O_NOCTTY 0400 /* not fcntl */
40 #define O_TRUNC 01000 /* not fcntl */
41 #define O_APPEND 02000
42 #define O_NONBLOCK 04000
43 #define O_NDELAY O_NONBLOCK
45 #define O_FSYNC O_SYNC
46 #define O_ASYNC 020000
49 # define O_DIRECT 040000 /* Direct disk access. */
50 # define O_DIRECTORY 0200000 /* Must be a directory. */
51 # define O_NOFOLLOW 0400000 /* Do not follow links. */
52 # define O_NOATIME 01000000 /* Do not set atime. */
53 # define O_CLOEXEC 02000000 /* Set close_on_exec. */
56 #ifdef __USE_LARGEFILE64
58 /* Not necessary, files are always with 64bit off_t. */
59 # define O_LARGEFILE 0
61 # define O_LARGEFILE 0100000
65 /* For now Linux has synchronisity options for data and read operations.
66 We define the symbols here but let them do the same as O_SYNC since
67 this is a superset. */
68 #if defined __USE_POSIX199309 || defined __USE_UNIX98
69 # define O_DSYNC O_SYNC /* Synchronize data. */
70 # define O_RSYNC O_SYNC /* Synchronize read operations. */
73 /* Values for the second argument to `fcntl'. */
74 #define F_DUPFD 0 /* Duplicate file descriptor. */
75 #define F_GETFD 1 /* Get file descriptor flags. */
76 #define F_SETFD 2 /* Set file descriptor flags. */
77 #define F_GETFL 3 /* Get file status flags. */
78 #define F_SETFL 4 /* Set file status flags. */
80 # define F_GETLK 5 /* Get record locking info. */
81 # define F_SETLK 6 /* Set record locking info (non-blocking). */
82 # define F_SETLKW 7 /* Set record locking info (blocking). */
83 /* Not necessary, we always have 64-bit offsets. */
84 # define F_GETLK64 5 /* Get record locking info. */
85 # define F_SETLK64 6 /* Set record locking info (non-blocking). */
86 # define F_SETLKW64 7 /* Set record locking info (blocking). */
88 # ifndef __USE_FILE_OFFSET64
89 # define F_GETLK 5 /* Get record locking info. */
90 # define F_SETLK 6 /* Set record locking info (non-blocking). */
91 # define F_SETLKW 7 /* Set record locking info (blocking). */
93 # define F_GETLK F_GETLK64 /* Get record locking info. */
94 # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/
95 # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */
97 # define F_GETLK64 12 /* Get record locking info. */
98 # define F_SETLK64 13 /* Set record locking info (non-blocking). */
99 # define F_SETLKW64 14 /* Set record locking info (blocking). */
102 #if defined __USE_BSD || defined __USE_UNIX98
103 # define F_SETOWN 8 /* Get owner (process receiving SIGIO). */
104 # define F_GETOWN 9 /* Set owner (process receiving SIGIO). */
108 # define F_SETSIG 10 /* Set number of signal to be sent. */
109 # define F_GETSIG 11 /* Get number of signal to be sent. */
110 # define F_SETOWN_EX 12 /* Get owner (thread receiving SIGIO). */
111 # define F_GETOWN_EX 13 /* Set owner (thread receiving SIGIO). */
115 # define F_SETLEASE 1024 /* Set a lease. */
116 # define F_GETLEASE 1025 /* Enquire what lease is active. */
117 # define F_NOTIFY 1026 /* Request notfications on a directory. */
118 # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with
119 close-on-exit set. */
122 /* For F_[GET|SET]FD. */
123 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */
125 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */
126 #define F_RDLCK 0 /* Read lock. */
127 #define F_WRLCK 1 /* Write lock. */
128 #define F_UNLCK 2 /* Remove lock. */
130 /* for old implementation of bsd flock () */
131 #define F_EXLCK 4 /* or 3 */
132 #define F_SHLCK 8 /* or 4 */
135 /* Operations for bsd flock(), also used by the kernel implementation */
136 # define LOCK_SH 1 /* shared lock */
137 # define LOCK_EX 2 /* exclusive lock */
138 # define LOCK_NB 4 /* or'd with one of the above to prevent
140 # define LOCK_UN 8 /* remove lock */
144 # define LOCK_MAND 32 /* This is a mandatory flock: */
145 # define LOCK_READ 64 /* ... which allows concurrent read operations. */
146 # define LOCK_WRITE 128 /* ... which allows concurrent write operations. */
147 # define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */
151 /* Types of directory notifications that may be requested with F_NOTIFY. */
152 # define DN_ACCESS 0x00000001 /* File accessed. */
153 # define DN_MODIFY 0x00000002 /* File modified. */
154 # define DN_CREATE 0x00000004 /* File created. */
155 # define DN_DELETE 0x00000008 /* File removed. */
156 # define DN_RENAME 0x00000010 /* File renamed. */
157 # define DN_ATTRIB 0x00000020 /* File changed attibutes. */
158 # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */
163 short int l_type
; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
164 short int l_whence
; /* Where `l_start' is relative to (like `lseek'). */
165 #if __WORDSIZE == 64 || !defined __USE_FILE_OFFSET64
166 __off_t l_start
; /* Offset where the lock begins. */
167 __off_t l_len
; /* Size of the locked area; zero means until EOF. */
169 __off64_t l_start
; /* Offset where the lock begins. */
170 __off64_t l_len
; /* Size of the locked area; zero means until EOF. */
172 __pid_t l_pid
; /* Process holding the lock. */
175 #ifdef __USE_LARGEFILE64
178 short int l_type
; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
179 short int l_whence
; /* Where `l_start' is relative to (like `lseek'). */
180 __off64_t l_start
; /* Offset where the lock begins. */
181 __off64_t l_len
; /* Size of the locked area; zero means until EOF. */
182 __pid_t l_pid
; /* Process holding the lock. */
190 F_OWNER_TID
= 0, /* Kernel thread. */
191 F_OWNER_PID
, /* Process. */
192 F_OWNER_GID
/* Process group. */
195 /* Structure to use with F_GETOWN_EX and F_SETOWN_EX. */
198 enum __pid_type type
; /* Owner type of ID. */
199 __pid_t pid
; /* ID of owner. */
203 /* Define some more compatibility macros to be backward compatible with
204 BSD systems which did not managed to hide these kernel macros. */
206 # define FAPPEND O_APPEND
207 # define FFSYNC O_FSYNC
208 # define FASYNC O_ASYNC
209 # define FNONBLOCK O_NONBLOCK
210 # define FNDELAY O_NDELAY
211 #endif /* Use BSD. */
213 /* Advise to `posix_fadvise'. */
215 # define POSIX_FADV_NORMAL 0 /* No further special treatment. */
216 # define POSIX_FADV_RANDOM 1 /* Expect random page references. */
217 # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
218 # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
219 # if __WORDSIZE == 64
220 # define POSIX_FADV_DONTNEED 6 /* Don't need these pages. */
221 # define POSIX_FADV_NOREUSE 7 /* Data will be accessed once. */
223 # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
224 # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
230 /* Flags for SYNC_FILE_RANGE. */
231 # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
232 in the range before performing the
234 # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
235 dirty pages in the range which are
236 not presently under writeback. */
237 # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in
238 the range after performing the
241 /* Flags for SPLICE and VMSPLICE. */
242 # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */
243 # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing
244 (but we may still block on the fd
245 we splice from/to). */
246 # define SPLICE_F_MORE 4 /* Expect more data. */
247 # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */
254 /* Provide kernel hint to read ahead. */
255 extern ssize_t
readahead (int __fd
, __off64_t __offset
, size_t __count
)
259 /* Selective file content synch'ing. */
260 extern int sync_file_range (int __fd
, __off64_t __from
, __off64_t __to
,
261 unsigned int __flags
);
264 /* Splice address range into a pipe. */
265 extern ssize_t
vmsplice (int __fdout
, const struct iovec
*__iov
,
266 size_t __count
, unsigned int __flags
);
268 /* Splice two files together. */
269 extern ssize_t
splice (int __fdin
, __off64_t
*__offin
, int __fdout
,
270 __off64_t
*__offout
, size_t __len
,
271 unsigned int __flags
);
273 /* In-kernel implementation of tee for pipe buffers. */
274 extern ssize_t
tee (int __fdin
, int __fdout
, size_t __len
,
275 unsigned int __flags
);
277 /* Reserve storage for the data of the file associated with FD. */
278 # ifndef __USE_FILE_OFFSET64
279 extern int fallocate (int __fd
, int __mode
, __off_t __offset
, __off_t __len
);
282 extern int __REDIRECT (fallocate
, (int __fd
, int __mode
, __off64_t __offset
,
286 # define fallocate fallocate64
289 # ifdef __USE_LARGEFILE64
290 extern int fallocate64 (int __fd
, int __mode
, __off64_t __offset
,