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1 | .\" Copyright (c) 2003 Andries Brouwer (aeb@cwi.nl) | |
2 | .\" | |
3 | .\" %%%LICENSE_START(GPLv2+_DOC_FULL) | |
4 | .\" This is free documentation; you can redistribute it and/or | |
5 | .\" modify it under the terms of the GNU General Public License as | |
6 | .\" published by the Free Software Foundation; either version 2 of | |
7 | .\" the License, or (at your option) any later version. | |
8 | .\" | |
9 | .\" The GNU General Public License's references to "object code" | |
10 | .\" and "executables" are to be interpreted as the output of any | |
11 | .\" document formatting or typesetting system, including | |
12 | .\" intermediate and printed output. | |
13 | .\" | |
14 | .\" This manual is distributed in the hope that it will be useful, | |
15 | .\" but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | .\" GNU General Public License for more details. | |
18 | .\" | |
19 | .\" You should have received a copy of the GNU General Public | |
20 | .\" License along with this manual; if not, see | |
21 | .\" <http://www.gnu.org/licenses/>. | |
22 | .\" %%%LICENSE_END | |
23 | .\" | |
24 | .TH POSIXOPTIONS 7 2018-04-30 "" "Linux Programmer's Manual" | |
25 | .SH NAME | |
26 | posixoptions \- optional parts of the POSIX standard | |
27 | .SH DESCRIPTION | |
28 | The POSIX standard (the information below is from POSIX.1-2001) | |
29 | describes a set of behaviors and interfaces for a compliant system. | |
30 | However, many interfaces are optional and there are feature test macros | |
31 | to test the availability of interfaces at compile time, and functions | |
32 | .BR sysconf (3), | |
33 | .BR fpathconf (3), | |
34 | .BR pathconf (3), | |
35 | .BR confstr (3) | |
36 | to do this at run time. | |
37 | From shell scripts one can use | |
38 | .BR getconf (1). | |
39 | For more detail, see | |
40 | .BR sysconf (3). | |
41 | .PP | |
42 | We give the name of the POSIX abbreviation, the option, the name of the | |
43 | .BR sysconf (3) | |
44 | parameter used to inquire about the option, and possibly | |
45 | a very short description. | |
46 | Much more precise detail can be found in the POSIX standard itself, | |
47 | versions of which can nowadays be accessed freely on the web. | |
48 | .SS ADV - _POSIX_ADVISORY_INFO - _SC_ADVISORY_INFO | |
49 | The following advisory functions are present: | |
50 | .PP | |
51 | .nf | |
52 | .in +4n | |
53 | .IR posix_fadvise () | |
54 | .IR posix_fallocate () | |
55 | .IR posix_memalign () | |
56 | .IR posix_madvise () | |
57 | .in | |
58 | .fi | |
59 | .SS AIO - _POSIX_ASYNCHRONOUS_IO - _SC_ASYNCHRONOUS_IO | |
60 | The header | |
61 | .I <aio.h> | |
62 | is present. | |
63 | The following functions are present: | |
64 | .PP | |
65 | .nf | |
66 | .in +4n | |
67 | .IR aio_cancel () | |
68 | .IR aio_error () | |
69 | .IR aio_fsync () | |
70 | .IR aio_read () | |
71 | .IR aio_return () | |
72 | .IR aio_suspend () | |
73 | .IR aio_write () | |
74 | .IR lio_listio () | |
75 | .in | |
76 | .fi | |
77 | .SS BAR - _POSIX_BARRIERS - _SC_BARRIERS | |
78 | This option implies the | |
79 | .B _POSIX_THREADS | |
80 | and | |
81 | .B _POSIX_THREAD_SAFE_FUNCTIONS | |
82 | options. | |
83 | The following functions are present: | |
84 | .PP | |
85 | .nf | |
86 | .in +4n | |
87 | .IR pthread_barrier_destroy () | |
88 | .IR pthread_barrier_init () | |
89 | .IR pthread_barrier_wait () | |
90 | .IR pthread_barrierattr_destroy () | |
91 | .IR pthread_barrierattr_init () | |
92 | .in | |
93 | .fi | |
94 | .\" .SS BE | |
95 | .\" Batch environment. | |
96 | .\" .SS CD | |
97 | .\" C development. | |
98 | .SS --- - POSIX_CHOWN_RESTRICTED | |
99 | If this option is in effect (as it always is under POSIX.1-2001), | |
100 | then only root may change the owner of a file, and nonroot can | |
101 | set the group of a file only to one of the groups it belongs to. | |
102 | This affects the following functions | |
103 | .PP | |
104 | .nf | |
105 | .in +4n | |
106 | .IR chown () | |
107 | .IR fchown () | |
108 | .in | |
109 | .fi | |
110 | .\" What about lchown() ? | |
111 | .SS CS - _POSIX_CLOCK_SELECTION - _SC_CLOCK_SELECTION | |
112 | This option implies the | |
113 | .B _POSIX_TIMERS | |
114 | option. | |
115 | The following functions are present: | |
116 | .PP | |
117 | .nf | |
118 | .in +4n | |
119 | .IR pthread_condattr_getclock () | |
120 | .IR pthread_condattr_setclock () | |
121 | .IR clock_nanosleep () | |
122 | .in | |
123 | .fi | |
124 | .PP | |
125 | If | |
126 | .B CLOCK_REALTIME | |
127 | is changed by the function | |
128 | .IR clock_settime (), | |
129 | then this affects all timers set for an absolute time. | |
130 | .SS CPT - _POSIX_CPUTIME - _SC_CPUTIME | |
131 | The | |
132 | .B CLOCK_PROCESS_CPUTIME_ID | |
133 | clock ID is supported. | |
134 | The initial value of this clock is 0 for each process. | |
135 | This option implies the | |
136 | .B _POSIX_TIMERS | |
137 | option. | |
138 | The function | |
139 | .IR clock_getcpuclockid () | |
140 | is present. | |
141 | .\" .SS FD | |
142 | .\" Fortran development | |
143 | .\" .SS FR | |
144 | .\" Fortran runtime | |
145 | .SS --- - _POSIX_FILE_LOCKING - _SC_FILE_LOCKING | |
146 | This option has been deleted. | |
147 | Not in final XPG6. | |
148 | .SS FSC - _POSIX_FSYNC - _SC_FSYNC | |
149 | The function | |
150 | .IR fsync () | |
151 | is present. | |
152 | .SS IP6 - _POSIX_IPV6 - _SC_IPV6 | |
153 | Internet Protocol Version 6 is supported. | |
154 | .SS --- - _POSIX_JOB_CONTROL - _SC_JOB_CONTROL | |
155 | If this option is in effect (as it always is under POSIX.1-2001), | |
156 | then the system implements POSIX-style job control, | |
157 | and the following functions are present: | |
158 | .PP | |
159 | .nf | |
160 | .in +4n | |
161 | .IR setpgid () | |
162 | .IR tcdrain () | |
163 | .IR tcflush () | |
164 | .IR tcgetpgrp () | |
165 | .IR tcsendbreak () | |
166 | .IR tcsetattr () | |
167 | .IR tcsetpgrp () | |
168 | .in | |
169 | .fi | |
170 | .SS MF - _POSIX_MAPPED_FILES - _SC_MAPPED_FILES | |
171 | Shared memory is supported. | |
172 | The include file | |
173 | .I <sys/mman.h> | |
174 | is present. | |
175 | The following functions are present: | |
176 | .PP | |
177 | .nf | |
178 | .in +4n | |
179 | .IR mmap () | |
180 | .IR msync () | |
181 | .IR munmap () | |
182 | .in | |
183 | .fi | |
184 | .SS ML - _POSIX_MEMLOCK - _SC_MEMLOCK | |
185 | Shared memory can be locked into core. | |
186 | The following functions are present: | |
187 | .PP | |
188 | .nf | |
189 | .in +4n | |
190 | .IR mlockall () | |
191 | .IR munlockall () | |
192 | .in | |
193 | .fi | |
194 | .SS MR/MLR - _POSIX_MEMLOCK_RANGE - _SC_MEMLOCK_RANGE | |
195 | More precisely, ranges can be locked into core. | |
196 | The following functions are present: | |
197 | .PP | |
198 | .nf | |
199 | .in +4n | |
200 | .IR mlock () | |
201 | .IR munlock () | |
202 | .in | |
203 | .fi | |
204 | .SS MPR - _POSIX_MEMORY_PROTECTION - _SC_MEMORY_PROTECTION | |
205 | The function | |
206 | .IR mprotect () | |
207 | is present. | |
208 | .SS MSG - _POSIX_MESSAGE_PASSING - _SC_MESSAGE_PASSING | |
209 | The include file | |
210 | .I <mqueue.h> | |
211 | is present. | |
212 | The following functions are present: | |
213 | .PP | |
214 | .nf | |
215 | .in +4n | |
216 | .IR mq_close () | |
217 | .IR mq_getattr () | |
218 | .IR mq_notify () | |
219 | .IR mq_open () | |
220 | .IR mq_receive () | |
221 | .IR mq_send () | |
222 | .IR mq_setattr () | |
223 | .IR mq_unlink () | |
224 | .in | |
225 | .fi | |
226 | .SS MON - _POSIX_MONOTONIC_CLOCK - _SC_MONOTONIC_CLOCK | |
227 | .B CLOCK_MONOTONIC | |
228 | is supported. | |
229 | This option implies the | |
230 | .B _POSIX_TIMERS | |
231 | option. | |
232 | The following functions are affected: | |
233 | .PP | |
234 | .nf | |
235 | .in +4n | |
236 | .IR aio_suspend () | |
237 | .IR clock_getres () | |
238 | .IR clock_gettime () | |
239 | .IR clock_settime () | |
240 | .IR timer_create () | |
241 | .in | |
242 | .fi | |
243 | .SS --- - _POSIX_MULTI_PROCESS - _SC_MULTI_PROCESS | |
244 | This option has been deleted. | |
245 | Not in final XPG6. | |
246 | .\" .SS MX | |
247 | .\" IEC 60559 Floating-Point Option. | |
248 | .SS --- - _POSIX_NO_TRUNC | |
249 | If this option is in effect (as it always is under POSIX.1-2001), | |
250 | then pathname components longer than | |
251 | .B NAME_MAX | |
252 | are not truncated, | |
253 | but give an error. | |
254 | This property may be dependent on the path prefix of the component. | |
255 | .SS PIO - _POSIX_PRIORITIZED_IO - _SC_PRIORITIZED_IO | |
256 | This option says that one can specify priorities for asynchronous I/O. | |
257 | This affects the functions | |
258 | .PP | |
259 | .nf | |
260 | .in +4n | |
261 | .IR aio_read () | |
262 | .IR aio_write () | |
263 | .in | |
264 | .fi | |
265 | .SS PS - _POSIX_PRIORITY_SCHEDULING - _SC_PRIORITY_SCHEDULING | |
266 | The include file | |
267 | .I <sched.h> | |
268 | is present. | |
269 | The following functions are present: | |
270 | .PP | |
271 | .nf | |
272 | .in +4n | |
273 | .IR sched_get_priority_max () | |
274 | .IR sched_get_priority_min () | |
275 | .IR sched_getparam () | |
276 | .IR sched_getscheduler () | |
277 | .IR sched_rr_get_interval () | |
278 | .IR sched_setparam () | |
279 | .IR sched_setscheduler () | |
280 | .IR sched_yield () | |
281 | .in | |
282 | .fi | |
283 | .PP | |
284 | If also | |
285 | .B _POSIX_SPAWN | |
286 | is in effect, then the following functions are present: | |
287 | .PP | |
288 | .nf | |
289 | .in +4n | |
290 | .IR posix_spawnattr_getschedparam () | |
291 | .IR posix_spawnattr_getschedpolicy () | |
292 | .IR posix_spawnattr_setschedparam () | |
293 | .IR posix_spawnattr_setschedpolicy () | |
294 | .in | |
295 | .fi | |
296 | .SS RS - _POSIX_RAW_SOCKETS | |
297 | Raw sockets are supported. | |
298 | The following functions are affected: | |
299 | .PP | |
300 | .nf | |
301 | .in +4n | |
302 | .IR getsockopt () | |
303 | .IR setsockopt () | |
304 | .in | |
305 | .fi | |
306 | .SS --- - _POSIX_READER_WRITER_LOCKS - _SC_READER_WRITER_LOCKS | |
307 | This option implies the | |
308 | .B _POSIX_THREADS | |
309 | option. | |
310 | Conversely, | |
311 | under POSIX.1-2001 the | |
312 | .B _POSIX_THREADS | |
313 | option implies this option. | |
314 | .PP | |
315 | The following functions are present: | |
316 | .PP | |
317 | .in +4n | |
318 | .nf | |
319 | .IR pthread_rwlock_destroy () | |
320 | .IR pthread_rwlock_init () | |
321 | .IR pthread_rwlock_rdlock () | |
322 | .IR pthread_rwlock_tryrdlock () | |
323 | .IR pthread_rwlock_trywrlock () | |
324 | .IR pthread_rwlock_unlock () | |
325 | .IR pthread_rwlock_wrlock () | |
326 | .IR pthread_rwlockattr_destroy () | |
327 | .IR pthread_rwlockattr_init () | |
328 | .in | |
329 | .fi | |
330 | .SS RTS - _POSIX_REALTIME_SIGNALS - _SC_REALTIME_SIGNALS | |
331 | Realtime signals are supported. | |
332 | The following functions are present: | |
333 | .PP | |
334 | .nf | |
335 | .in +4n | |
336 | .IR sigqueue () | |
337 | .IR sigtimedwait () | |
338 | .IR sigwaitinfo () | |
339 | .in | |
340 | .fi | |
341 | .SS --- - _POSIX_REGEXP - _SC_REGEXP | |
342 | If this option is in effect (as it always is under POSIX.1-2001), | |
343 | then POSIX regular expressions are supported | |
344 | and the following functions are present: | |
345 | .PP | |
346 | .nf | |
347 | .in +4n | |
348 | .IR regcomp () | |
349 | .IR regerror () | |
350 | .IR regexec () | |
351 | .IR regfree () | |
352 | .in | |
353 | .fi | |
354 | .SS --- - _POSIX_SAVED_IDS - _SC_SAVED_IDS | |
355 | If this option is in effect (as it always is under POSIX.1-2001), | |
356 | then a process has a saved set-user-ID and a saved set-group-ID. | |
357 | The following functions are affected: | |
358 | .PP | |
359 | .nf | |
360 | .in +4n | |
361 | .IR exec () | |
362 | .IR kill () | |
363 | .IR seteuid () | |
364 | .IR setegid () | |
365 | .IR setgid () | |
366 | .IR setuid () | |
367 | .in | |
368 | .fi | |
369 | .\" .SS SD | |
370 | .\" Software development | |
371 | .SS SEM - _POSIX_SEMAPHORES - _SC_SEMAPHORES | |
372 | The include file | |
373 | .I <semaphore.h> | |
374 | is present. | |
375 | The following functions are present: | |
376 | .PP | |
377 | .nf | |
378 | .in +4n | |
379 | .IR sem_close () | |
380 | .IR sem_destroy () | |
381 | .IR sem_getvalue () | |
382 | .IR sem_init () | |
383 | .IR sem_open () | |
384 | .IR sem_post () | |
385 | .IR sem_trywait () | |
386 | .IR sem_unlink () | |
387 | .IR sem_wait () | |
388 | .in | |
389 | .fi | |
390 | .SS SHM - _POSIX_SHARED_MEMORY_OBJECTS - _SC_SHARED_MEMORY_OBJECTS | |
391 | The following functions are present: | |
392 | .PP | |
393 | .nf | |
394 | .in +4n | |
395 | .IR mmap () | |
396 | .IR munmap () | |
397 | .IR shm_open () | |
398 | .IR shm_unlink () | |
399 | .in | |
400 | .fi | |
401 | .SS --- - _POSIX_SHELL - _SC_SHELL | |
402 | If this option is in effect (as it always is under POSIX.1-2001), | |
403 | the function | |
404 | .IR system () | |
405 | is present. | |
406 | .SS SPN - _POSIX_SPAWN - _SC_SPAWN | |
407 | This option describes support for process creation in a context where | |
408 | it is difficult or impossible to use | |
409 | .IR fork (), | |
410 | for example, because no MMU is present. | |
411 | .PP | |
412 | If | |
413 | .B _POSIX_SPAWN | |
414 | is in effect, then the include file | |
415 | .I <spawn.h> | |
416 | and the following functions are present: | |
417 | .PP | |
418 | .nf | |
419 | .in +4n | |
420 | .IR posix_spawn () | |
421 | .IR posix_spawn_file_actions_addclose () | |
422 | .IR posix_spawn_file_actions_adddup2 () | |
423 | .IR posix_spawn_file_actions_addopen () | |
424 | .IR posix_spawn_file_actions_destroy () | |
425 | .IR posix_spawn_file_actions_init () | |
426 | .IR posix_spawnattr_destroy () | |
427 | .IR posix_spawnattr_getsigdefault () | |
428 | .IR posix_spawnattr_getflags () | |
429 | .IR posix_spawnattr_getpgroup () | |
430 | .IR posix_spawnattr_getsigmask () | |
431 | .IR posix_spawnattr_init () | |
432 | .IR posix_spawnattr_setsigdefault () | |
433 | .IR posix_spawnattr_setflags () | |
434 | .IR posix_spawnattr_setpgroup () | |
435 | .IR posix_spawnattr_setsigmask () | |
436 | .IR posix_spawnp () | |
437 | .in | |
438 | .fi | |
439 | .PP | |
440 | If also | |
441 | .B _POSIX_PRIORITY_SCHEDULING | |
442 | is in effect, then | |
443 | the following functions are present: | |
444 | .PP | |
445 | .nf | |
446 | .in +4n | |
447 | .IR posix_spawnattr_getschedparam () | |
448 | .IR posix_spawnattr_getschedpolicy () | |
449 | .IR posix_spawnattr_setschedparam () | |
450 | .IR posix_spawnattr_setschedpolicy () | |
451 | .in | |
452 | .fi | |
453 | .SS SPI - _POSIX_SPIN_LOCKS - _SC_SPIN_LOCKS | |
454 | This option implies the | |
455 | .B _POSIX_THREADS | |
456 | and | |
457 | .B _POSIX_THREAD_SAFE_FUNCTIONS | |
458 | options. | |
459 | The following functions are present: | |
460 | .PP | |
461 | .nf | |
462 | .in +4n | |
463 | .IR pthread_spin_destroy () | |
464 | .IR pthread_spin_init () | |
465 | .IR pthread_spin_lock () | |
466 | .IR pthread_spin_trylock () | |
467 | .IR pthread_spin_unlock () | |
468 | .in -4n | |
469 | .fi | |
470 | .SS SS - _POSIX_SPORADIC_SERVER - _SC_SPORADIC_SERVER | |
471 | The scheduling policy | |
472 | .B SCHED_SPORADIC | |
473 | is supported. | |
474 | This option implies the | |
475 | .B _POSIX_PRIORITY_SCHEDULING | |
476 | option. | |
477 | The following functions are affected: | |
478 | .PP | |
479 | .nf | |
480 | .in +4n | |
481 | .IR sched_setparam () | |
482 | .IR sched_setscheduler () | |
483 | .in | |
484 | .fi | |
485 | .SS SIO - _POSIX_SYNCHRONIZED_IO - _SC_SYNCHRONIZED_IO | |
486 | The following functions are affected: | |
487 | .PP | |
488 | .nf | |
489 | .in +4n | |
490 | .IR open () | |
491 | .IR msync () | |
492 | .IR fsync () | |
493 | .IR fdatasync () | |
494 | .in | |
495 | .fi | |
496 | .SS TSA - _POSIX_THREAD_ATTR_STACKADDR - _SC_THREAD_ATTR_STACKADDR | |
497 | The following functions are affected: | |
498 | .PP | |
499 | .nf | |
500 | .in +4n | |
501 | .IR pthread_attr_getstack () | |
502 | .IR pthread_attr_getstackaddr () | |
503 | .IR pthread_attr_setstack () | |
504 | .IR pthread_attr_setstackaddr () | |
505 | .in | |
506 | .fi | |
507 | .SS TSS - _POSIX_THREAD_ATTR_STACKSIZE - _SC_THREAD_ATTR_STACKSIZE | |
508 | The following functions are affected: | |
509 | .PP | |
510 | .nf | |
511 | .in +4n | |
512 | .IR pthread_attr_getstack () | |
513 | .IR pthread_attr_getstacksize () | |
514 | .IR pthread_attr_setstack () | |
515 | .IR pthread_attr_setstacksize () | |
516 | .in | |
517 | .fi | |
518 | .SS TCT - _POSIX_THREAD_CPUTIME - _SC_THREAD_CPUTIME | |
519 | The clockID CLOCK_THREAD_CPUTIME_ID is supported. | |
520 | This option implies the | |
521 | .B _POSIX_TIMERS | |
522 | option. | |
523 | The following functions are affected: | |
524 | .PP | |
525 | .nf | |
526 | .in +4n | |
527 | .IR pthread_getcpuclockid () | |
528 | .IR clock_getres () | |
529 | .IR clock_gettime () | |
530 | .IR clock_settime () | |
531 | .IR timer_create () | |
532 | .in | |
533 | .fi | |
534 | .SS TPI - _POSIX_THREAD_PRIO_INHERIT - _SC_THREAD_PRIO_INHERIT | |
535 | The following functions are affected: | |
536 | .PP | |
537 | .nf | |
538 | .in +4n | |
539 | .IR pthread_mutexattr_getprotocol () | |
540 | .IR pthread_mutexattr_setprotocol () | |
541 | .in | |
542 | .fi | |
543 | .SS TPP - _POSIX_THREAD_PRIO_PROTECT - _SC_THREAD_PRIO_PROTECT | |
544 | The following functions are affected: | |
545 | .PP | |
546 | .nf | |
547 | .in +4n | |
548 | .IR pthread_mutex_getprioceiling () | |
549 | .IR pthread_mutex_setprioceiling () | |
550 | .IR pthread_mutexattr_getprioceiling () | |
551 | .IR pthread_mutexattr_getprotocol () | |
552 | .IR pthread_mutexattr_setprioceiling () | |
553 | .IR pthread_mutexattr_setprotocol () | |
554 | .in | |
555 | .fi | |
556 | .SS TPS - _POSIX_THREAD_PRIORITY_SCHEDULING - _SC_THREAD_PRIORITY_SCHEDULING | |
557 | If this option is in effect, the different threads inside a process | |
558 | can run with different priorities and/or different schedulers. | |
559 | The following functions are affected: | |
560 | .PP | |
561 | .nf | |
562 | .in +4n | |
563 | .IR pthread_attr_getinheritsched () | |
564 | .IR pthread_attr_getschedpolicy () | |
565 | .IR pthread_attr_getscope () | |
566 | .IR pthread_attr_setinheritsched () | |
567 | .IR pthread_attr_setschedpolicy () | |
568 | .IR pthread_attr_setscope () | |
569 | .IR pthread_getschedparam () | |
570 | .IR pthread_setschedparam () | |
571 | .IR pthread_setschedprio () | |
572 | .in | |
573 | .fi | |
574 | .SS TSH - _POSIX_THREAD_PROCESS_SHARED - _SC_THREAD_PROCESS_SHARED | |
575 | The following functions are affected: | |
576 | .PP | |
577 | .nf | |
578 | .in +4n | |
579 | .IR pthread_barrierattr_getpshared () | |
580 | .IR pthread_barrierattr_setpshared () | |
581 | .IR pthread_condattr_getpshared () | |
582 | .IR pthread_condattr_setpshared () | |
583 | .IR pthread_mutexattr_getpshared () | |
584 | .IR pthread_mutexattr_setpshared () | |
585 | .IR pthread_rwlockattr_getpshared () | |
586 | .IR pthread_rwlockattr_setpshared () | |
587 | .in | |
588 | .fi | |
589 | .SS TSF - _POSIX_THREAD_SAFE_FUNCTIONS - _SC_THREAD_SAFE_FUNCTIONS | |
590 | The following functions are affected: | |
591 | .PP | |
592 | .nf | |
593 | .in +4n | |
594 | .IR readdir_r () | |
595 | .IR getgrgid_r () | |
596 | .IR getgrnam_r () | |
597 | .IR getpwnam_r () | |
598 | .IR getpwuid_r () | |
599 | .IR flockfile () | |
600 | .IR ftrylockfile () | |
601 | .IR funlockfile () | |
602 | .IR getc_unlocked () | |
603 | .IR getchar_unlocked () | |
604 | .IR putc_unlocked () | |
605 | .IR putchar_unlocked () | |
606 | .IR rand_r () | |
607 | .IR strerror_r () | |
608 | .IR strtok_r () | |
609 | .IR asctime_r () | |
610 | .IR ctime_r () | |
611 | .IR gmtime_r () | |
612 | .IR localtime_r () | |
613 | .in | |
614 | .fi | |
615 | .SS TSP - _POSIX_THREAD_SPORADIC_SERVER - _SC_THREAD_SPORADIC_SERVER | |
616 | This option implies the | |
617 | .B _POSIX_THREAD_PRIORITY_SCHEDULING | |
618 | option. | |
619 | The following functions are affected: | |
620 | .PP | |
621 | .nf | |
622 | .in +4n | |
623 | .IR sched_getparam () | |
624 | .IR sched_setparam () | |
625 | .IR sched_setscheduler () | |
626 | .in | |
627 | .fi | |
628 | .SS THR - _POSIX_THREADS - _SC_THREADS | |
629 | Basic support for POSIX threads is available. | |
630 | The following functions are present: | |
631 | .PP | |
632 | .nf | |
633 | .in +4n | |
634 | .IR pthread_atfork () | |
635 | .IR pthread_attr_destroy () | |
636 | .IR pthread_attr_getdetachstate () | |
637 | .IR pthread_attr_getschedparam () | |
638 | .IR pthread_attr_init () | |
639 | .IR pthread_attr_setdetachstate () | |
640 | .IR pthread_attr_setschedparam () | |
641 | .IR pthread_cancel () | |
642 | .IR pthread_cleanup_push () | |
643 | .IR pthread_cleanup_pop () | |
644 | .IR pthread_cond_broadcast () | |
645 | .IR pthread_cond_destroy () | |
646 | .IR pthread_cond_init () | |
647 | .IR pthread_cond_signal () | |
648 | .IR pthread_cond_timedwait () | |
649 | .IR pthread_cond_wait () | |
650 | .IR pthread_condattr_destroy () | |
651 | .IR pthread_condattr_init () | |
652 | .IR pthread_create () | |
653 | .IR pthread_detach () | |
654 | .IR pthread_equal () | |
655 | .IR pthread_exit () | |
656 | .IR pthread_getspecific () | |
657 | .IR pthread_join () | |
658 | .IR pthread_key_create () | |
659 | .IR pthread_key_delete () | |
660 | .IR pthread_mutex_destroy () | |
661 | .IR pthread_mutex_init () | |
662 | .IR pthread_mutex_lock () | |
663 | .IR pthread_mutex_trylock () | |
664 | .IR pthread_mutex_unlock () | |
665 | .IR pthread_mutexattr_destroy () | |
666 | .IR pthread_mutexattr_init () | |
667 | .IR pthread_once () | |
668 | .IR pthread_rwlock_destroy () | |
669 | .IR pthread_rwlock_init () | |
670 | .IR pthread_rwlock_rdlock () | |
671 | .IR pthread_rwlock_tryrdlock () | |
672 | .IR pthread_rwlock_trywrlock () | |
673 | .IR pthread_rwlock_unlock () | |
674 | .IR pthread_rwlock_wrlock () | |
675 | .IR pthread_rwlockattr_destroy () | |
676 | .IR pthread_rwlockattr_init () | |
677 | .IR pthread_self () | |
678 | .IR pthread_setcancelstate () | |
679 | .IR pthread_setcanceltype () | |
680 | .IR pthread_setspecific () | |
681 | .IR pthread_testcancel () | |
682 | .in | |
683 | .fi | |
684 | .SS TMO - _POSIX_TIMEOUTS - _SC_TIMEOUTS | |
685 | The following functions are present: | |
686 | .PP | |
687 | .nf | |
688 | .in +4n | |
689 | .IR mq_timedreceive () | |
690 | .IR mq_timedsend () | |
691 | .IR pthread_mutex_timedlock () | |
692 | .IR pthread_rwlock_timedrdlock () | |
693 | .IR pthread_rwlock_timedwrlock () | |
694 | .IR sem_timedwait () | |
695 | .IR posix_trace_timedgetnext_event () | |
696 | .in | |
697 | .fi | |
698 | .SS TMR - _POSIX_TIMERS - _SC_TIMERS | |
699 | The following functions are present: | |
700 | .PP | |
701 | .nf | |
702 | .in +4n | |
703 | .IR clock_getres () | |
704 | .IR clock_gettime () | |
705 | .IR clock_settime () | |
706 | .IR nanosleep () | |
707 | .IR timer_create () | |
708 | .IR timer_delete () | |
709 | .IR timer_gettime () | |
710 | .IR timer_getoverrun () | |
711 | .IR timer_settime () | |
712 | .in | |
713 | .fi | |
714 | .SS TRC - _POSIX_TRACE - _SC_TRACE | |
715 | POSIX tracing is available. | |
716 | The following functions are present: | |
717 | .PP | |
718 | .nf | |
719 | .in +4n | |
720 | .IR posix_trace_attr_destroy () | |
721 | .IR posix_trace_attr_getclockres () | |
722 | .IR posix_trace_attr_getcreatetime () | |
723 | .IR posix_trace_attr_getgenversion () | |
724 | .IR posix_trace_attr_getmaxdatasize () | |
725 | .IR posix_trace_attr_getmaxsystemeventsize () | |
726 | .IR posix_trace_attr_getmaxusereventsize () | |
727 | .IR posix_trace_attr_getname () | |
728 | .IR posix_trace_attr_getstreamfullpolicy () | |
729 | .IR posix_trace_attr_getstreamsize () | |
730 | .IR posix_trace_attr_init () | |
731 | .IR posix_trace_attr_setmaxdatasize () | |
732 | .IR posix_trace_attr_setname () | |
733 | .IR posix_trace_attr_setstreamsize () | |
734 | .IR posix_trace_attr_setstreamfullpolicy () | |
735 | .IR posix_trace_clear () | |
736 | .IR posix_trace_create () | |
737 | .IR posix_trace_event () | |
738 | .IR posix_trace_eventid_equal () | |
739 | .IR posix_trace_eventid_get_name () | |
740 | .IR posix_trace_eventid_open () | |
741 | .IR posix_trace_eventtypelist_getnext_id () | |
742 | .IR posix_trace_eventtypelist_rewind () | |
743 | .IR posix_trace_flush () | |
744 | .IR posix_trace_get_attr () | |
745 | .IR posix_trace_get_status () | |
746 | .IR posix_trace_getnext_event () | |
747 | .IR posix_trace_shutdown () | |
748 | .IR posix_trace_start () | |
749 | .IR posix_trace_stop () | |
750 | .IR posix_trace_trygetnext_event () | |
751 | .in | |
752 | .fi | |
753 | .SS TEF - _POSIX_TRACE_EVENT_FILTER - _SC_TRACE_EVENT_FILTER | |
754 | This option implies the | |
755 | .B _POSIX_TRACE | |
756 | option. | |
757 | The following functions are present: | |
758 | .PP | |
759 | .nf | |
760 | .in +4n | |
761 | .IR posix_trace_eventset_add () | |
762 | .IR posix_trace_eventset_del () | |
763 | .IR posix_trace_eventset_empty () | |
764 | .IR posix_trace_eventset_fill () | |
765 | .IR posix_trace_eventset_ismember () | |
766 | .IR posix_trace_get_filter () | |
767 | .IR posix_trace_set_filter () | |
768 | .IR posix_trace_trid_eventid_open () | |
769 | .in | |
770 | .fi | |
771 | .SS TRI - _POSIX_TRACE_INHERIT - _SC_TRACE_INHERIT | |
772 | Tracing children of the traced process is supported. | |
773 | This option implies the | |
774 | .B _POSIX_TRACE | |
775 | option. | |
776 | The following functions are present: | |
777 | .PP | |
778 | .nf | |
779 | .in +4n | |
780 | .IR posix_trace_attr_getinherited () | |
781 | .IR posix_trace_attr_setinherited () | |
782 | .in | |
783 | .fi | |
784 | .SS TRL - _POSIX_TRACE_LOG - _SC_TRACE_LOG | |
785 | This option implies the | |
786 | .B _POSIX_TRACE | |
787 | option. | |
788 | The following functions are present: | |
789 | .PP | |
790 | .nf | |
791 | .in +4n | |
792 | .IR posix_trace_attr_getlogfullpolicy () | |
793 | .IR posix_trace_attr_getlogsize () | |
794 | .IR posix_trace_attr_setlogfullpolicy () | |
795 | .IR posix_trace_attr_setlogsize () | |
796 | .IR posix_trace_close () | |
797 | .IR posix_trace_create_withlog () | |
798 | .IR posix_trace_open () | |
799 | .IR posix_trace_rewind () | |
800 | .in | |
801 | .fi | |
802 | .SS TYM - _POSIX_TYPED_MEMORY_OBJECTS - _SC_TYPED_MEMORY_OBJECT | |
803 | The following functions are present: | |
804 | .PP | |
805 | .nf | |
806 | .in +4n | |
807 | .IR posix_mem_offset () | |
808 | .IR posix_typed_mem_get_info () | |
809 | .IR posix_typed_mem_open () | |
810 | .in | |
811 | .fi | |
812 | .SS --- - _POSIX_VDISABLE | |
813 | Always present (probably 0). | |
814 | Value to set a changeable special control | |
815 | character to indicate that it is disabled. | |
816 | .SH X/OPEN SYSTEM INTERFACE EXTENSIONS | |
817 | .SS XSI - _XOPEN_CRYPT - _SC_XOPEN_CRYPT | |
818 | The following functions are present: | |
819 | .PP | |
820 | .nf | |
821 | .in +4n | |
822 | .IR crypt () | |
823 | .IR encrypt () | |
824 | .IR setkey () | |
825 | .fi | |
826 | .SS XSI - _XOPEN_REALTIME - _SC_XOPEN_REALTIME | |
827 | This option implies the following options: | |
828 | .PP | |
829 | .PD 0 | |
830 | .TP | |
831 | .BR _POSIX_ASYNCHRONOUS_IO == 200112L | |
832 | .TP | |
833 | .B _POSIX_FSYNC | |
834 | .TP | |
835 | .B _POSIX_MAPPED_FILES | |
836 | .TP | |
837 | .BR _POSIX_MEMLOCK == 200112L | |
838 | .TP | |
839 | .BR _POSIX_MEMLOCK_RANGE == 200112L | |
840 | .TP | |
841 | .B _POSIX_MEMORY_PROTECTION | |
842 | .TP | |
843 | .BR _POSIX_MESSAGE_PASSING == 200112L | |
844 | .TP | |
845 | .B _POSIX_PRIORITIZED_IO | |
846 | .TP | |
847 | .BR _POSIX_PRIORITY_SCHEDULING == 200112L | |
848 | .TP | |
849 | .BR _POSIX_REALTIME_SIGNALS == 200112L | |
850 | .TP | |
851 | .BR _POSIX_SEMAPHORES == 200112L | |
852 | .TP | |
853 | .BR _POSIX_SHARED_MEMORY_OBJECTS == 200112L | |
854 | .TP | |
855 | .BR _POSIX_SYNCHRONIZED_IO == 200112L | |
856 | .TP | |
857 | .BR _POSIX_TIMERS == 200112L | |
858 | .PD | |
859 | .\" | |
860 | .SS ADV - --- - --- | |
861 | The Advanced Realtime option group implies that the following options | |
862 | are all defined to 200112L: | |
863 | .PP | |
864 | .PD 0 | |
865 | .TP | |
866 | .B _POSIX_ADVISORY_INFO | |
867 | .TP | |
868 | .B _POSIX_CLOCK_SELECTION | |
869 | (implies | |
870 | .BR _POSIX_TIMERS ) | |
871 | .TP | |
872 | .B _POSIX_CPUTIME | |
873 | (implies | |
874 | .BR _POSIX_TIMERS ) | |
875 | .TP | |
876 | .B _POSIX_MONOTONIC_CLOCK | |
877 | (implies | |
878 | .BR _POSIX_TIMERS ) | |
879 | .TP | |
880 | .B _POSIX_SPAWN | |
881 | .TP | |
882 | .B _POSIX_SPORADIC_SERVER | |
883 | (implies | |
884 | .BR _POSIX_PRIORITY_SCHEDULING ) | |
885 | .TP | |
886 | .B _POSIX_TIMEOUTS | |
887 | .TP | |
888 | .B _POSIX_TYPED_MEMORY_OBJECTS | |
889 | .PD | |
890 | .\" | |
891 | .SS XSI - _XOPEN_REALTIME_THREADS - _SC_XOPEN_REALTIME_THREADS | |
892 | This option implies that the following options | |
893 | are all defined to 200112L: | |
894 | .PP | |
895 | .PD 0 | |
896 | .TP | |
897 | .B _POSIX_THREAD_PRIO_INHERIT | |
898 | .TP | |
899 | .B _POSIX_THREAD_PRIO_PROTECT | |
900 | .TP | |
901 | .B _POSIX_THREAD_PRIORITY_SCHEDULING | |
902 | .PD | |
903 | .SS ADVANCED REALTIME THREADS - --- - --- | |
904 | This option implies that the following options | |
905 | are all defined to 200112L: | |
906 | .PP | |
907 | .PD 0 | |
908 | .TP | |
909 | .B _POSIX_BARRIERS | |
910 | (implies | |
911 | .BR _POSIX_THREADS , | |
912 | .BR _POSIX_THREAD_SAFE_FUNCTIONS ) | |
913 | .TP | |
914 | .B _POSIX_SPIN_LOCKS | |
915 | (implies | |
916 | .BR _POSIX_THREADS , | |
917 | .BR _POSIX_THREAD_SAFE_FUNCTIONS ) | |
918 | .TP | |
919 | .B _POSIX_THREAD_CPUTIME | |
920 | (implies | |
921 | .BR _POSIX_TIMERS ) | |
922 | .TP | |
923 | .B _POSIX_THREAD_SPORADIC_SERVER | |
924 | (implies | |
925 | .BR _POSIX_THREAD_PRIORITY_SCHEDULING ) | |
926 | .PD | |
927 | .\" | |
928 | .SS TRACING - --- - --- | |
929 | This option implies that the following options | |
930 | are all defined to 200112L: | |
931 | .PP | |
932 | .PD 0 | |
933 | .TP | |
934 | .B _POSIX_TRACE | |
935 | .TP | |
936 | .B _POSIX_TRACE_EVENT_FILTER | |
937 | .TP | |
938 | .B _POSIX_TRACE_LOG | |
939 | .TP | |
940 | .B _POSIX_TRACE_INHERIT | |
941 | .PD | |
942 | .SS STREAMS - _XOPEN_STREAMS - _SC_XOPEN_STREAMS | |
943 | The following functions are present: | |
944 | .PP | |
945 | .nf | |
946 | .in +4n | |
947 | .IR fattach () | |
948 | .IR fdetach () | |
949 | .IR getmsg () | |
950 | .IR getpmsg () | |
951 | .IR ioctl () | |
952 | .IR isastream () | |
953 | .IR putmsg () | |
954 | .IR putpmsg () | |
955 | .in | |
956 | .fi | |
957 | .SS XSI - _XOPEN_LEGACY - _SC_XOPEN_LEGACY | |
958 | Functions included in the legacy option group were previously mandatory, | |
959 | but are now optional in this version. | |
960 | The following functions are present: | |
961 | .PP | |
962 | .nf | |
963 | .in +4n | |
964 | .IR bcmp () | |
965 | .IR bcopy () | |
966 | .IR bzero () | |
967 | .IR ecvt () | |
968 | .IR fcvt () | |
969 | .IR ftime () | |
970 | .IR gcvt () | |
971 | .IR getcwd () | |
972 | .IR index () | |
973 | .IR mktemp () | |
974 | .IR rindex () | |
975 | .IR utimes () | |
976 | .IR wcswcs () | |
977 | .in | |
978 | .fi | |
979 | .SS XSI - _XOPEN_UNIX - _SC_XOPEN_UNIX | |
980 | The following functions are present: | |
981 | .PP | |
982 | .nf | |
983 | .in +4n | |
984 | .IR mmap () | |
985 | .IR munmap () | |
986 | .IR msync () | |
987 | .in | |
988 | .fi | |
989 | .PP | |
990 | This option implies the following options: | |
991 | .PP | |
992 | .PD 0 | |
993 | .TP | |
994 | .B _POSIX_FSYNC | |
995 | .TP | |
996 | .B _POSIX_MAPPED_FILES | |
997 | .TP | |
998 | .B _POSIX_MEMORY_PROTECTION | |
999 | .TP | |
1000 | .B _POSIX_THREAD_ATTR_STACKADDR | |
1001 | .TP | |
1002 | .B _POSIX_THREAD_ATTR_STACKSIZE | |
1003 | .TP | |
1004 | .B _POSIX_THREAD_PROCESS_SHARED | |
1005 | .TP | |
1006 | .B _POSIX_THREAD_SAFE_FUNCTIONS | |
1007 | .TP | |
1008 | .B _POSIX_THREADS | |
1009 | .PD | |
1010 | .PP | |
1011 | This option may imply the following options from the XSI option groups: | |
1012 | .PP | |
1013 | .PD 0 | |
1014 | .TP | |
1015 | .RB "Encryption (" _XOPEN_CRYPT ) | |
1016 | .TP | |
1017 | .RB "Realtime (" _XOPEN_REALTIME ) | |
1018 | .TP | |
1019 | .RB "Advanced Realtime (" ADB ) | |
1020 | .TP | |
1021 | .RB "Realtime Threads (" _XOPEN_REALTIME_THREADS ) | |
1022 | .TP | |
1023 | .RB "Advanced Realtime Threads (" "ADVANCED REALTIME THREADS" ) | |
1024 | .TP | |
1025 | .RB "Tracing (" TRACING ) | |
1026 | .TP | |
1027 | .RB "XSI Streams (" STREAMS ) | |
1028 | .TP | |
1029 | .RB "Legacy (" _XOPEN_LEGACY ) | |
1030 | .PD | |
1031 | .SH SEE ALSO | |
1032 | .BR sysconf (3), | |
1033 | .BR standards (7) |