1 /* O_*, F_*, FD_* bit values for Linux.
2 Copyright (C) 1995, 1996, 1997, 1998, 2000, 2002, 2003, 2004, 2006
3 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
26 #include <sys/types.h>
28 # include <bits/uio.h>
32 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files
33 located on an ext2 file system */
34 #define O_ACCMODE 0003
38 #define O_APPEND 0x0008
40 #define O_NONBLOCK 0x0080
41 #define O_NDELAY O_NONBLOCK
42 #define O_CREAT 0x0100 /* not fcntl */
43 #define O_TRUNC 0x0200 /* not fcntl */
44 #define O_EXCL 0x0400 /* not fcntl */
45 #define O_NOCTTY 0x0800 /* not fcntl */
46 #define O_FSYNC O_SYNC
47 #define O_ASYNC 0x1000
50 # define O_NOFOLLOW 0x20000 /* Do not follow links. */
51 # define O_DIRECT 0x8000 /* Direct disk access hint. */
52 # define O_DIRECTORY 0x10000 /* Must be a directory. */
53 # define O_NOATIME 0x40000 /* Do not set atime. */
54 # define O_CLOEXEC 02000000 /* set close_on_exec */
57 /* For now Linux has no synchronisity options for data and read operations.
58 We define the symbols here but let them do the same as O_SYNC since
59 this is a superset. */
60 #if defined __USE_POSIX199309 || defined __USE_UNIX98
61 # define O_DSYNC O_SYNC /* Synchronize data. */
62 # define O_RSYNC O_SYNC /* Synchronize read operations. */
65 #ifdef __USE_LARGEFILE64
67 # define O_LARGEFILE 0
69 # define O_LARGEFILE 0x2000 /* Allow large file opens. */
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. */
79 #ifndef __USE_FILE_OFFSET64
80 # define F_GETLK 14 /* 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). */
84 # define F_GETLK F_GETLK64 /* Get record locking info. */
85 # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/
86 # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */
90 # define F_GETLK64 14 /* Get record locking info. */
91 # define F_SETLK64 6 /* Set record locking info (non-blocking). */
92 # define F_SETLKW64 7 /* Set record locking info (blocking). */
94 # define F_GETLK64 33 /* Get record locking info. */
95 # define F_SETLK64 34 /* Set record locking info (non-blocking). */
96 # define F_SETLKW64 35 /* Set record locking info (blocking). */
99 #if defined __USE_BSD || defined __USE_UNIX98
100 # define F_SETOWN 24 /* Get owner of socket (receiver of SIGIO). */
101 # define F_GETOWN 23 /* Set owner of socket (receiver of SIGIO). */
105 # define F_SETSIG 10 /* Set number of signal to be sent. */
106 # define F_GETSIG 11 /* Get number of signal to be sent. */
110 # define F_SETLEASE 1024 /* Set a lease. */
111 # define F_GETLEASE 1025 /* Enquire what lease is active. */
112 # define F_NOTIFY 1026 /* Request notfications on a directory. */
113 # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with
114 close-on-exit set on new fd. */
117 /* For F_[GET|SET]FL. */
118 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */
120 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */
121 #define F_RDLCK 0 /* Read lock. */
122 #define F_WRLCK 1 /* Write lock. */
123 #define F_UNLCK 2 /* Remove lock. */
125 /* For old implementation of bsd flock(). */
126 #define F_EXLCK 4 /* or 3 */
127 #define F_SHLCK 8 /* or 4 */
130 /* Operations for bsd flock(), also used by the kernel implementation. */
131 # define LOCK_SH 1 /* shared lock */
132 # define LOCK_EX 2 /* exclusive lock */
133 # define LOCK_NB 4 /* or'd with one of the above to prevent
135 # define LOCK_UN 8 /* remove lock */
139 # define LOCK_MAND 32 /* This is a mandatory flock: */
140 # define LOCK_READ 64 /* ... which allows concurrent read operations. */
141 # define LOCK_WRITE 128 /* ... which allows concurrent write operations. */
142 # define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */
146 /* Types of directory notifications that may be requested with F_NOTIFY. */
147 # define DN_ACCESS 0x00000001 /* File accessed. */
148 # define DN_MODIFY 0x00000002 /* File modified. */
149 # define DN_CREATE 0x00000004 /* File created. */
150 # define DN_DELETE 0x00000008 /* File removed. */
151 # define DN_RENAME 0x00000010 /* File renamed. */
152 # define DN_ATTRIB 0x00000020 /* File changed attibutes. */
153 # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */
158 short int l_type
; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
159 short int l_whence
; /* Where `l_start' is relative to (like `lseek'). */
160 #ifndef __USE_FILE_OFFSET64
161 __off_t l_start
; /* Offset where the lock begins. */
162 __off_t l_len
; /* Size of the locked area; zero means until EOF. */
163 #if _MIPS_SIM != _ABI64
164 /* The 64-bit flock structure, used by the n64 ABI, and for 64-bit
165 fcntls in o32 and n32, never has this field. */
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. */
173 #if ! defined __USE_FILE_OFFSET64 && _MIPS_SIM != _ABI64
174 /* The 64-bit flock structure, used by the n64 ABI, and for 64-bit
175 flock in o32 and n32, never has this field. */
179 typedef struct flock flock_t
;
181 #ifdef __USE_LARGEFILE64
184 short int l_type
; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
185 short int l_whence
; /* Where `l_start' is relative to (like `lseek'). */
186 __off64_t l_start
; /* Offset where the lock begins. */
187 __off64_t l_len
; /* Size of the locked area; zero means until EOF. */
188 __pid_t l_pid
; /* Process holding the lock. */
192 /* Define some more compatibility macros to be backward compatible with
193 BSD systems which did not managed to hide these kernel macros. */
195 # define FAPPEND O_APPEND
196 # define FFSYNC O_FSYNC
197 # define FASYNC O_ASYNC
198 # define FNONBLOCK O_NONBLOCK
199 # define FNDELAY O_NDELAY
200 #endif /* Use BSD. */
202 /* Advise to `posix_fadvise'. */
204 # define POSIX_FADV_NORMAL 0 /* No further special treatment. */
205 # define POSIX_FADV_RANDOM 1 /* Expect random page references. */
206 # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
207 # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
208 # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
209 # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
213 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
214 /* Flags for SYNC_FILE_RANGE. */
215 # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
216 in the range before performing the
218 # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
219 dirty pages in the range which are
220 not presently under writeback. */
221 # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in
222 the range after performing the
225 /* Flags for SPLICE and VMSPLICE. */
226 # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */
227 # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing
228 (but we may still block on the fd
229 we splice from/to). */
230 # define SPLICE_F_MORE 4 /* Expect more data. */
231 # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */
236 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__
238 /* Provide kernel hint to read ahead. */
239 extern ssize_t
readahead (int __fd
, __off64_t __offset
, size_t __count
)
243 /* Selective file content synch'ing. */
244 extern int sync_file_range (int __fd
, __off64_t __from
, __off64_t __to
,
245 unsigned int __flags
);
247 /* Splice address range into a pipe. */
248 extern ssize_t
vmsplice (int __fdout
, const struct iovec
*__iov
,
249 size_t __count
, unsigned int __flags
);
251 /* Splice two files together. */
252 extern ssize_t
splice (int __fdin
, __off64_t
*__offin
, int __fdout
,
253 __off64_t
*__offout
, size_t __len
,
254 unsigned int __flags
);
256 /* In-kernel implementation of tee for pipe buffers. */
257 extern ssize_t
tee (int __fdin
, int __fdout
, size_t __len
,
258 unsigned int __flags
);