FreeBSD/Linux Kernel Cross Reference
sys/sys/unistd.h
1 /* $NetBSD: unistd.h,v 1.63 2020/05/16 18:31:53 christos Exp $ */
2
3 /*
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)unistd.h 8.2 (Berkeley) 1/7/94
32 */
33
34 #ifndef _SYS_UNISTD_H_
35 #define _SYS_UNISTD_H_
36
37 #include <sys/featuretest.h>
38
39 /* compile-time symbolic constants */
40 #define _POSIX_JOB_CONTROL 1
41 /* implementation supports job control */
42
43 /*
44 * According to POSIX 1003.1:
45 * "The saved set-user-ID capability allows a program to regain the
46 * effective user ID established at the last exec call."
47 * However, the setuid/setgid function as specified by POSIX 1003.1 does
48 * not allow changing the effective ID from the super-user without also
49 * changed the saved ID, so it is impossible to get super-user privileges
50 * back later. Instead we provide this feature independent of the current
51 * effective ID through the seteuid/setegid function. In addition, we do
52 * not use the saved ID as specified by POSIX 1003.1 in setuid/setgid,
53 * because this would make it impossible for a set-user-ID executable
54 * owned by a user other than the super-user to permanently revoke its
55 * extra privileges.
56 */
57 #ifdef _NOT_AVAILABLE
58 #define _POSIX_SAVED_IDS 1
59 /* saved set-user-ID and set-group-ID */
60 #endif
61
62 #define _POSIX_VERSION 200112L
63 #define _POSIX2_VERSION 200112L
64
65 /*
66 * We support the posix_spawn() family of functions (unconditionally).
67 */
68 #define _POSIX_SPAWN 200809L
69
70 /* execution-time symbolic constants */
71
72 /*
73 * POSIX options and option groups we unconditionally do or don't
74 * implement. Those options which are implemented (or not) entirely
75 * in user mode are defined in <unistd.h>. Please keep this list in
76 * alphabetical order.
77 *
78 * Anything which is defined as zero below **must** have an
79 * implementation for the corresponding sysconf() which is able to
80 * determine conclusively whether or not the feature is supported.
81 * Anything which is defined as other than -1 below **must** have
82 * complete headers, types, and function declarations as specified by
83 * the POSIX standard; however, if the relevant sysconf() function
84 * returns -1, the functions may be stubbed out.
85 */
86 /* Advisory information */
87 #undef _POSIX_ADVISORY_INFO
88 /* asynchronous I/O is available */
89 #define _POSIX_ASYNCHRONOUS_IO 200112L
90 /* barriers */
91 #define _POSIX_BARRIERS 200112L
92 /* chown requires correct privileges */
93 #define _POSIX_CHOWN_RESTRICTED 1
94 /* clock selection */
95 #define _POSIX_CLOCK_SELECTION -1
96 /* cputime clock */
97 #define _POSIX_CPUTIME 200112L
98 /* CPU type */
99 #undef _POSIX_CPUTYPE
100 /* file synchronization is available */
101 #define _POSIX_FSYNC 1
102 /* support IPv6 */
103 #define _POSIX_IPV6 0
104 /* job control is available */
105 #define _POSIX_JOB_CONTROL 1
106 /* memory mapped files */
107 #define _POSIX_MAPPED_FILES 1
108 /* memory locking whole address space */
109 #define _POSIX_MEMLOCK 1
110 /* memory locking address ranges */
111 #define _POSIX_MEMLOCK_RANGE 1
112 /* memory access protections */
113 #define _POSIX_MEMORY_PROTECTION 1
114 /* message passing is available */
115 #define _POSIX_MESSAGE_PASSING 200112L
116 /* monotonic clock */
117 #define _POSIX_MONOTONIC_CLOCK 200112L
118 /* too-long path comp generate errors */
119 #define _POSIX_NO_TRUNC 1
120 /* prioritized I/O */
121 #define _POSIX_PRIORITIZED_IO -1
122 /* priority scheduling */
123 #define _POSIX_PRIORITY_SCHEDULING 200112L
124 /* raw sockets */
125 #define _POSIX_RAW_SOCKETS 200112L
126 /* read/write locks */
127 #define _POSIX_READER_WRITER_LOCKS 200112L
128 /* realtime signals */
129 #undef _POSIX_REALTIME_SIGNALS
130 /* regular expressions */
131 #define _POSIX_REGEXP 1
132 /* semaphores */
133 #define _POSIX_SEMAPHORES 0
134 /* shared memory objects */
135 #define _POSIX_SHARED_MEMORY_OBJECTS 0
136 /* shell */
137 #define _POSIX_SHELL 1
138 /* spin locks */
139 #define _POSIX_SPIN_LOCKS 200112L
140 /* sporadic server */
141 #undef _POSIX_SPORADIC_SERVER
142 /* synchronized I/O is available */
143 #define _POSIX_SYNCHRONIZED_IO 1
144 /* threads */
145 #define _POSIX_THREADS 200112L
146 /* pthread_attr for stack size */
147 #define _POSIX_THREAD_ATTR_STACKSIZE 200112L
148 /* pthread_attr for stack address */
149 #define _POSIX_THREAD_ATTR_STACKADDR 200112L
150 /* thread cputime clock */
151 #define _POSIX_THREAD_CPUTIME 200112L
152 /* _r functions */
153 #define _POSIX_THREAD_PRIO_PROTECT 200112L
154 /* PTHREAD_PRIO_PROTECT */
155 #define _POSIX_THREAD_SAFE_FUNCTIONS 200112L
156 /* timeouts */
157 #undef _POSIX_TIMEOUTS
158 /* timers */
159 #define _POSIX_TIMERS 200112L
160 /* typed memory objects */
161 #undef _POSIX_TYPED_MEMORY_OBJECTS
162 /* may disable terminal spec chars */
163 #define _POSIX_VDISABLE __CAST(unsigned char, '\377')
164
165 /* C binding */
166 #define _POSIX2_C_BIND 200112L
167
168 /* XPG4.2 shared memory */
169 #define _XOPEN_SHM 0
170
171 /* access function */
172 #define F_OK 0 /* test for existence of file */
173 #define X_OK 0x01 /* test for execute or search permission */
174 #define W_OK 0x02 /* test for write permission */
175 #define R_OK 0x04 /* test for read permission */
176
177 /* whence values for lseek(2) */
178 #define SEEK_SET 0 /* set file offset to offset */
179 #define SEEK_CUR 1 /* set file offset to current plus offset */
180 #define SEEK_END 2 /* set file offset to EOF plus offset */
181
182 #if defined(_NETBSD_SOURCE)
183 /* whence values for lseek(2); renamed by POSIX 1003.1 */
184 #define L_SET SEEK_SET
185 #define L_INCR SEEK_CUR
186 #define L_XTND SEEK_END
187
188 /*
189 * fsync_range values.
190 *
191 * Note the following flag values were chosen to not overlap
192 * values for SEEK_XXX flags. While not currently implemented,
193 * it is possible to extend this call to respect SEEK_CUR and
194 * SEEK_END offset addressing modes.
195 */
196 #define FDATASYNC 0x0010 /* sync data and minimal metadata */
197 #define FFILESYNC 0x0020 /* sync data and metadata */
198 #define FDISKSYNC 0x0040 /* flush disk caches after sync */
199 #endif
200
201 /* configurable pathname variables; use as argument to pathconf(3) */
202 #define _PC_LINK_MAX 1
203 #define _PC_MAX_CANON 2
204 #define _PC_MAX_INPUT 3
205 #define _PC_NAME_MAX 4
206 #define _PC_PATH_MAX 5
207 #define _PC_PIPE_BUF 6
208 #define _PC_CHOWN_RESTRICTED 7
209 #define _PC_NO_TRUNC 8
210 #define _PC_VDISABLE 9
211 #define _PC_SYNC_IO 10
212 #define _PC_FILESIZEBITS 11
213 #define _PC_SYMLINK_MAX 12
214 #define _PC_2_SYMLINKS 13
215 #define _PC_ACL_EXTENDED 14
216
217 /* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */
218 #define _PC_MIN_HOLE_SIZE 15
219
220 #ifdef _NETBSD_SOURCE
221 #define _PC_ACL_PATH_MAX 16
222 #define _PC_ACL_NFS4 17
223 #endif
224
225 /* configurable system variables; use as argument to sysconf(3) */
226 /*
227 * XXX The value of _SC_CLK_TCK is embedded in <time.h>.
228 * XXX The value of _SC_PAGESIZE is embedded in <sys/shm.h>.
229 */
230 #define _SC_ARG_MAX 1
231 #define _SC_CHILD_MAX 2
232 #define _O_SC_CLK_TCK 3 /* Old version, always 100 */
233 #define _SC_NGROUPS_MAX 4
234 #define _SC_OPEN_MAX 5
235 #define _SC_JOB_CONTROL 6
236 #define _SC_SAVED_IDS 7
237 #define _SC_VERSION 8
238 #define _SC_BC_BASE_MAX 9
239 #define _SC_BC_DIM_MAX 10
240 #define _SC_BC_SCALE_MAX 11
241 #define _SC_BC_STRING_MAX 12
242 #define _SC_COLL_WEIGHTS_MAX 13
243 #define _SC_EXPR_NEST_MAX 14
244 #define _SC_LINE_MAX 15
245 #define _SC_RE_DUP_MAX 16
246 #define _SC_2_VERSION 17
247 #define _SC_2_C_BIND 18
248 #define _SC_2_C_DEV 19
249 #define _SC_2_CHAR_TERM 20
250 #define _SC_2_FORT_DEV 21
251 #define _SC_2_FORT_RUN 22
252 #define _SC_2_LOCALEDEF 23
253 #define _SC_2_SW_DEV 24
254 #define _SC_2_UPE 25
255 #define _SC_STREAM_MAX 26
256 #define _SC_TZNAME_MAX 27
257 #define _SC_PAGESIZE 28
258 #define _SC_PAGE_SIZE _SC_PAGESIZE /* 1170 compatibility */
259 #define _SC_FSYNC 29
260 #define _SC_XOPEN_SHM 30
261 #define _SC_SYNCHRONIZED_IO 31
262 #define _SC_IOV_MAX 32
263 #define _SC_MAPPED_FILES 33
264 #define _SC_MEMLOCK 34
265 #define _SC_MEMLOCK_RANGE 35
266 #define _SC_MEMORY_PROTECTION 36
267 #define _SC_LOGIN_NAME_MAX 37
268 #define _SC_MONOTONIC_CLOCK 38
269 #define _SC_CLK_TCK 39 /* New, variable version */
270 #define _SC_ATEXIT_MAX 40
271 #define _SC_THREADS 41
272 #define _SC_SEMAPHORES 42
273 #define _SC_BARRIERS 43
274 #define _SC_TIMERS 44
275 #define _SC_SPIN_LOCKS 45
276 #define _SC_READER_WRITER_LOCKS 46
277 #define _SC_GETGR_R_SIZE_MAX 47
278 #define _SC_GETPW_R_SIZE_MAX 48
279 #define _SC_CLOCK_SELECTION 49
280 #define _SC_ASYNCHRONOUS_IO 50
281 #define _SC_AIO_LISTIO_MAX 51
282 #define _SC_AIO_MAX 52
283 #define _SC_MESSAGE_PASSING 53
284 #define _SC_MQ_OPEN_MAX 54
285 #define _SC_MQ_PRIO_MAX 55
286 #define _SC_PRIORITY_SCHEDULING 56
287 #define _SC_THREAD_DESTRUCTOR_ITERATIONS 57
288 #define _SC_THREAD_KEYS_MAX 58
289 #define _SC_THREAD_STACK_MIN 59
290 #define _SC_THREAD_THREADS_MAX 60
291 #define _SC_THREAD_ATTR_STACKADDR 61
292 #define _SC_THREAD_ATTR_STACKSIZE 62
293 #define _SC_THREAD_PRIORITY_SCHEDULING 63
294 #define _SC_THREAD_PRIO_INHERIT 64
295 #define _SC_THREAD_PRIO_PROTECT 65
296 #define _SC_THREAD_PROCESS_SHARED 66
297 #define _SC_THREAD_SAFE_FUNCTIONS 67
298 #define _SC_TTY_NAME_MAX 68
299 #define _SC_HOST_NAME_MAX 69
300 #define _SC_PASS_MAX 70
301 #define _SC_REGEXP 71
302 #define _SC_SHELL 72
303 #define _SC_SYMLOOP_MAX 73
304
305 /* Actually, they are not supported or implemented yet */
306 #define _SC_V6_ILP32_OFF32 74
307 #define _SC_V6_ILP32_OFFBIG 75
308 #define _SC_V6_LP64_OFF64 76
309 #define _SC_V6_LPBIG_OFFBIG 77
310 #define _SC_2_PBS 80
311 #define _SC_2_PBS_ACCOUNTING 81
312 #define _SC_2_PBS_CHECKPOINT 82
313 #define _SC_2_PBS_LOCATE 83
314 #define _SC_2_PBS_MESSAGE 84
315 #define _SC_2_PBS_TRACK 85
316
317 /* These are implemented */
318 #define _SC_SPAWN 86
319 #define _SC_SHARED_MEMORY_OBJECTS 87
320
321 #define _SC_TIMER_MAX 88
322 #define _SC_SEM_NSEMS_MAX 89
323 #define _SC_CPUTIME 90
324 #define _SC_THREAD_CPUTIME 91
325 #define _SC_DELAYTIMER_MAX 92
326 #define _SC_SIGQUEUE_MAX 93
327 #define _SC_REALTIME_SIGNALS 94
328 #define _SC_RTSIG_MAX 95
329
330 /* Extensions found in Solaris and Linux. */
331 #define _SC_PHYS_PAGES 121
332
333 #ifdef _NETBSD_SOURCE
334 /* Commonly provided sysconf() extensions */
335 #define _SC_NPROCESSORS_CONF 1001
336 #define _SC_NPROCESSORS_ONLN 1002
337 /* Native variables */
338 #define _SC_SCHED_RT_TS 2001
339 #define _SC_SCHED_PRI_MIN 2002
340 #define _SC_SCHED_PRI_MAX 2003
341 #endif /* _NETBSD_SOURCE */
342
343 /* configurable system strings */
344 #define _CS_PATH 1
345
346 #endif /* !_SYS_UNISTD_H_ */
Cache object: 142e854d46323f8df9201e205a0c1773
|