1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
|
/* O_*, F_*, FD_* bit values for Linux.
Copyright (C) 2001-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _FCNTL_H
# error "Never use <bits/fcntl-linux.h> directly; include <fcntl.h> instead."
#endif
/* This file contains shared definitions between Linux architectures
and is included by <bits/fcntl.h> to declare them. The various
#ifndef cases allow the architecture specific file to define those
values with different values.
A minimal <bits/fcntl.h> contains just:
struct flock {...}
#ifdef __USE_LARGEFILE64
struct flock64 {...}
#endif
#include <bits/fcntl-linux.h>
*/
#ifdef __USE_GNU
# include <bits/types/struct_iovec.h>
#endif
/* open/fcntl. */
#define O_ACCMODE 0003
#define O_RDONLY 00
#define O_WRONLY 01
#define O_RDWR 02
#ifndef O_CREAT
# define O_CREAT 0100 /* Not fcntl. */
#endif
#ifndef O_EXCL
# define O_EXCL 0200 /* Not fcntl. */
#endif
#ifndef O_NOCTTY
# define O_NOCTTY 0400 /* Not fcntl. */
#endif
#ifndef O_TRUNC
# define O_TRUNC 01000 /* Not fcntl. */
#endif
#ifndef O_APPEND
# define O_APPEND 02000
#endif
#ifndef O_NONBLOCK
# define O_NONBLOCK 04000
#endif
#ifndef O_NDELAY
# define O_NDELAY O_NONBLOCK
#endif
#ifndef O_SYNC
# define O_SYNC 04010000
#endif
#define O_FSYNC O_SYNC
#ifndef O_ASYNC
# define O_ASYNC 020000
#endif
#ifndef __O_LARGEFILE
# define __O_LARGEFILE 0100000
#endif
#ifndef __O_DIRECTORY
# define __O_DIRECTORY 0200000
#endif
#ifndef __O_NOFOLLOW
# define __O_NOFOLLOW 0400000
#endif
#ifndef __O_CLOEXEC
# define __O_CLOEXEC 02000000
#endif
#ifndef __O_DIRECT
# define __O_DIRECT 040000
#endif
#ifndef __O_NOATIME
# define __O_NOATIME 01000000
#endif
#ifndef __O_PATH
# define __O_PATH 010000000
#endif
#ifndef __O_DSYNC
# define __O_DSYNC 010000
#endif
#ifndef __O_TMPFILE
# define __O_TMPFILE (020000000 | __O_DIRECTORY)
#endif
#ifndef F_GETLK
# ifndef __USE_FILE_OFFSET64
# define F_GETLK 5 /* Get record locking info. */
# define F_SETLK 6 /* Set record locking info (non-blocking). */
# define F_SETLKW 7 /* Set record locking info (blocking). */
# else
# define F_GETLK F_GETLK64 /* Get record locking info. */
# define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/
# define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */
# endif
#endif
#ifndef F_GETLK64
# define F_GETLK64 12 /* Get record locking info. */
# define F_SETLK64 13 /* Set record locking info (non-blocking). */
# define F_SETLKW64 14 /* Set record locking info (blocking). */
#endif
/* open file description locks.
Usually record locks held by a process are released on *any* close and are
not inherited across a fork.
These cmd values will set locks that conflict with process-associated record
locks, but are "owned" by the opened file description, not the process.
This means that they are inherited across fork or clone with CLONE_FILES
like BSD (flock) locks, and they are only released automatically when the
last reference to the the file description against which they were acquired
is put. */
#ifdef __USE_GNU
# define F_OFD_GETLK 36
# define F_OFD_SETLK 37
# define F_OFD_SETLKW 38
#endif
#ifdef __USE_LARGEFILE64
# define O_LARGEFILE __O_LARGEFILE
#endif
#ifdef __USE_XOPEN2K8
# define O_DIRECTORY __O_DIRECTORY /* Must be a directory. */
# define O_NOFOLLOW __O_NOFOLLOW /* Do not follow links. */
# define O_CLOEXEC __O_CLOEXEC /* Set close_on_exec. */
#endif
#ifdef __USE_GNU
# define O_DIRECT __O_DIRECT /* Direct disk access. */
# define O_NOATIME __O_NOATIME /* Do not set atime. */
# define O_PATH __O_PATH /* Resolve pathname but do not open file. */
# define O_TMPFILE __O_TMPFILE /* Atomically create nameless file. */
#endif
/* For now, Linux has no separate synchronicity options for read
operations. We define O_RSYNC therefore as the same as O_SYNC
since this is a superset. */
#if defined __USE_POSIX199309 || defined __USE_UNIX98
# define O_DSYNC __O_DSYNC /* Synchronize data. */
# if defined __O_RSYNC
# define O_RSYNC __O_RSYNC /* Synchronize read operations. */
# else
# define O_RSYNC O_SYNC /* Synchronize read operations. */
# endif
#endif
/* Values for the second argument to `fcntl'. */
#define F_DUPFD 0 /* Duplicate file descriptor. */
#define F_GETFD 1 /* Get file descriptor flags. */
#define F_SETFD 2 /* Set file descriptor flags. */
#define F_GETFL 3 /* Get file status flags. */
#define F_SETFL 4 /* Set file status flags. */
#ifndef __F_SETOWN
# define __F_SETOWN 8
# define __F_GETOWN 9
#endif
#if defined __USE_UNIX98 || defined __USE_XOPEN2K8
# define F_SETOWN __F_SETOWN /* Get owner (process receiving SIGIO). */
# define F_GETOWN __F_GETOWN /* Set owner (process receiving SIGIO). */
#endif
#ifndef __F_SETSIG
# define __F_SETSIG 10 /* Set number of signal to be sent. */
# define __F_GETSIG 11 /* Get number of signal to be sent. */
#endif
#ifndef __F_SETOWN_EX
# define __F_SETOWN_EX 15 /* Get owner (thread receiving SIGIO). */
# define __F_GETOWN_EX 16 /* Set owner (thread receiving SIGIO). */
#endif
#ifdef __USE_GNU
# define F_SETSIG __F_SETSIG /* Set number of signal to be sent. */
# define F_GETSIG __F_GETSIG /* Get number of signal to be sent. */
# define F_SETOWN_EX __F_SETOWN_EX /* Get owner (thread receiving SIGIO). */
# define F_GETOWN_EX __F_GETOWN_EX /* Set owner (thread receiving SIGIO). */
#endif
#ifdef __USE_GNU
# define F_SETLEASE 1024 /* Set a lease. */
# define F_GETLEASE 1025 /* Enquire what lease is active. */
# define F_NOTIFY 1026 /* Request notifications on a directory. */
# define F_SETPIPE_SZ 1031 /* Set pipe page size array. */
# define F_GETPIPE_SZ 1032 /* Set pipe page size array. */
# define F_ADD_SEALS 1033 /* Add seals to file. */
# define F_GET_SEALS 1034 /* Get seals for file. */
/* Set / get write life time hints. */
# define F_GET_RW_HINT 1035
# define F_SET_RW_HINT 1036
# define F_GET_FILE_RW_HINT 1037
# define F_SET_FILE_RW_HINT 1038
#endif
#ifdef __USE_XOPEN2K8
# define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with
close-on-exit set. */
#endif
/* For F_[GET|SET]FD. */
#define FD_CLOEXEC 1 /* Actually anything with low bit set goes */
#ifndef F_RDLCK
/* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */
# define F_RDLCK 0 /* Read lock. */
# define F_WRLCK 1 /* Write lock. */
# define F_UNLCK 2 /* Remove lock. */
#endif
/* For old implementation of BSD flock. */
#ifndef F_EXLCK
# define F_EXLCK 4 /* or 3 */
# define F_SHLCK 8 /* or 4 */
#endif
#ifdef __USE_MISC
/* Operations for BSD flock, also used by the kernel implementation. */
# define LOCK_SH 1 /* Shared lock. */
# define LOCK_EX 2 /* Exclusive lock. */
# define LOCK_NB 4 /* Or'd with one of the above to prevent
blocking. */
# define LOCK_UN 8 /* Remove lock. */
#endif
#ifdef __USE_GNU
# define LOCK_MAND 32 /* This is a mandatory flock: */
# define LOCK_READ 64 /* ... which allows concurrent read operations. */
# define LOCK_WRITE 128 /* ... which allows concurrent write operations. */
# define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */
#endif
#ifdef __USE_GNU
/* Types of directory notifications that may be requested with F_NOTIFY. */
# define DN_ACCESS 0x00000001 /* File accessed. */
# define DN_MODIFY 0x00000002 /* File modified. */
# define DN_CREATE 0x00000004 /* File created. */
# define DN_DELETE 0x00000008 /* File removed. */
# define DN_RENAME 0x00000010 /* File renamed. */
# define DN_ATTRIB 0x00000020 /* File changed attributes. */
# define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */
#endif
#ifdef __USE_GNU
/* Owner types. */
enum __pid_type
{
F_OWNER_TID = 0, /* Kernel thread. */
F_OWNER_PID, /* Process. */
F_OWNER_PGRP, /* Process group. */
F_OWNER_GID = F_OWNER_PGRP /* Alternative, obsolete name. */
};
/* Structure to use with F_GETOWN_EX and F_SETOWN_EX. */
struct f_owner_ex
{
enum __pid_type type; /* Owner type of ID. */
__pid_t pid; /* ID of owner. */
};
#endif
#ifdef __USE_GNU
/* Types of seals. */
# define F_SEAL_SEAL 0x0001 /* Prevent further seals from being set. */
# define F_SEAL_SHRINK 0x0002 /* Prevent file from shrinking. */
# define F_SEAL_GROW 0x0004 /* Prevent file from growing. */
# define F_SEAL_WRITE 0x0008 /* Prevent writes. */
# define F_SEAL_FUTURE_WRITE 0x0010 /* Prevent future writes while
mapped. */
#endif
#ifdef __USE_GNU
/* Hint values for F_{GET,SET}_RW_HINT. */
# define RWH_WRITE_LIFE_NOT_SET 0
# define RWF_WRITE_LIFE_NOT_SET RWH_WRITE_LIFE_NOT_SET
# define RWH_WRITE_LIFE_NONE 1
# define RWH_WRITE_LIFE_SHORT 2
# define RWH_WRITE_LIFE_MEDIUM 3
# define RWH_WRITE_LIFE_LONG 4
# define RWH_WRITE_LIFE_EXTREME 5
#endif
/* Define some more compatibility macros to be backward compatible with
BSD systems which did not managed to hide these kernel macros. */
#ifdef __USE_MISC
# define FAPPEND O_APPEND
# define FFSYNC O_FSYNC
# define FASYNC O_ASYNC
# define FNONBLOCK O_NONBLOCK
# define FNDELAY O_NDELAY
#endif /* Use misc. */
#ifndef __POSIX_FADV_DONTNEED
# define __POSIX_FADV_DONTNEED 4
# define __POSIX_FADV_NOREUSE 5
#endif
/* Advise to `posix_fadvise'. */
#ifdef __USE_XOPEN2K
# define POSIX_FADV_NORMAL 0 /* No further special treatment. */
# define POSIX_FADV_RANDOM 1 /* Expect random page references. */
# define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
# define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
# define POSIX_FADV_DONTNEED __POSIX_FADV_DONTNEED /* Don't need these pages. */
# define POSIX_FADV_NOREUSE __POSIX_FADV_NOREUSE /* Data will be accessed once. */
#endif
#ifdef __USE_GNU
/* Flags for SYNC_FILE_RANGE. */
# define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
in the range before performing the
write. */
# define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
dirty pages in the range which are
not presently under writeback. */
# define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in
the range after performing the
write. */
/* SYNC_FILE_RANGE_WRITE_AND_WAIT ensures all pages in the range are
written to disk before returning. */
# define SYNC_FILE_RANGE_WRITE_AND_WAIT (SYNC_FILE_RANGE_WRITE \
| SYNC_FILE_RANGE_WAIT_BEFORE \
| SYNC_FILE_RANGE_WAIT_AFTER)
/* Flags for SPLICE and VMSPLICE. */
# define SPLICE_F_MOVE 1 /* Move pages instead of copying. */
# define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing
(but we may still block on the fd
we splice from/to). */
# define SPLICE_F_MORE 4 /* Expect more data. */
# define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */
/* Flags for fallocate. */
# include <linux/falloc.h>
/* File handle structure. */
struct file_handle
{
unsigned int handle_bytes;
int handle_type;
/* File identifier. */
unsigned char f_handle[0];
};
/* Maximum handle size (for now). */
# define MAX_HANDLE_SZ 128
#endif
__BEGIN_DECLS
#ifdef __USE_GNU
/* Provide kernel hint to read ahead. */
extern __ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
__THROW;
/* Selective file content synch'ing.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int sync_file_range (int __fd, __off64_t __offset, __off64_t __count,
unsigned int __flags);
/* Splice address range into a pipe.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern __ssize_t vmsplice (int __fdout, const struct iovec *__iov,
size_t __count, unsigned int __flags);
/* Splice two files together.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern __ssize_t splice (int __fdin, __off64_t *__offin, int __fdout,
__off64_t *__offout, size_t __len,
unsigned int __flags);
/* In-kernel implementation of tee for pipe buffers.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern __ssize_t tee (int __fdin, int __fdout, size_t __len,
unsigned int __flags);
/* Reserve storage for the data of the file associated with FD.
This function is a possible cancellation point and therefore not
marked with __THROW. */
# ifndef __USE_FILE_OFFSET64
extern int fallocate (int __fd, int __mode, __off_t __offset, __off_t __len);
# else
# ifdef __REDIRECT
extern int __REDIRECT (fallocate, (int __fd, int __mode, __off64_t __offset,
__off64_t __len),
fallocate64);
# else
# define fallocate fallocate64
# endif
# endif
# ifdef __USE_LARGEFILE64
extern int fallocate64 (int __fd, int __mode, __off64_t __offset,
__off64_t __len);
# endif
/* Map file name to file handle. */
extern int name_to_handle_at (int __dfd, const char *__name,
struct file_handle *__handle, int *__mnt_id,
int __flags) __THROW;
/* Open file using the file handle.
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern int open_by_handle_at (int __mountdirfd, struct file_handle *__handle,
int __flags);
#endif /* use GNU */
__END_DECLS
|