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1 | /* Copyright (C) 1991-2016 Free Software Foundation, Inc. | |
2 | This file is part of the GNU C Library. | |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library; if not, see | |
16 | <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <errno.h> | |
19 | #include <limits.h> | |
20 | #include <grp.h> | |
21 | #include <pwd.h> | |
22 | #include <stddef.h> | |
23 | #include <stdio.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <time.h> | |
27 | #include <unistd.h> | |
28 | #include <sys/param.h> | |
29 | #include <sys/stat.h> | |
30 | #include <sys/sysinfo.h> | |
31 | #include <sys/types.h> | |
32 | #include <regex.h> | |
33 | ||
34 | #define NEED_SPEC_ARRAY 0 | |
35 | #include <posix-conf-vars.h> | |
36 | ||
37 | #define NEED_CHECK_SPEC \ | |
38 | (!defined _XBS5_ILP32_OFF32 || !defined _XBS5_ILP32_OFFBIG \ | |
39 | || !defined _XBS5_LP64_OFF64 || !defined _XBS5_LPBIG_OFFBIG \ | |
40 | || !defined _POSIX_V6_ILP32_OFF32 || !defined _POSIX_V6_ILP32_OFFBIG \ | |
41 | || !defined _POSIX_V6_LP64_OFF64 || !defined _POSIX_V6_LPBIG_OFFBIG \ | |
42 | || !defined _POSIX_V7_ILP32_OFF32 || !defined _POSIX_V7_ILP32_OFFBIG \ | |
43 | || !defined _POSIX_V7_LP64_OFF64 || !defined _POSIX_V7_LPBIG_OFFBIG) | |
44 | #if NEED_CHECK_SPEC | |
45 | static long int __sysconf_check_spec (const char *spec); | |
46 | #endif | |
47 | ||
48 | ||
49 | /* Get the value of the system variable NAME. */ | |
50 | long int | |
51 | __sysconf (int name) | |
52 | { | |
53 | switch (name) | |
54 | { | |
55 | /* Also add obsolete or unnecessarily added constants here. */ | |
56 | case _SC_EQUIV_CLASS_MAX: | |
57 | default: | |
58 | __set_errno (EINVAL); | |
59 | return -1; | |
60 | ||
61 | case _SC_ARG_MAX: | |
62 | #ifdef ARG_MAX | |
63 | return ARG_MAX; | |
64 | #else | |
65 | return -1; | |
66 | #endif | |
67 | ||
68 | case _SC_CHILD_MAX: | |
69 | #ifdef CHILD_MAX | |
70 | return CHILD_MAX; | |
71 | #else | |
72 | return __get_child_max (); | |
73 | #endif | |
74 | ||
75 | case _SC_CLK_TCK: | |
76 | return __getclktck (); | |
77 | ||
78 | case _SC_NGROUPS_MAX: | |
79 | #ifdef NGROUPS_MAX | |
80 | return NGROUPS_MAX; | |
81 | #else | |
82 | return -1; | |
83 | #endif | |
84 | ||
85 | case _SC_OPEN_MAX: | |
86 | return __getdtablesize (); | |
87 | ||
88 | case _SC_STREAM_MAX: | |
89 | #ifdef STREAM_MAX | |
90 | return STREAM_MAX; | |
91 | #else | |
92 | return FOPEN_MAX; | |
93 | #endif | |
94 | ||
95 | case _SC_TZNAME_MAX: | |
96 | return MAX (__tzname_max (), _POSIX_TZNAME_MAX); | |
97 | ||
98 | case _SC_JOB_CONTROL: | |
99 | #if CONF_IS_DEFINED_SET (_POSIX_JOB_CONTROL) | |
100 | return _POSIX_JOB_CONTROL; | |
101 | #else | |
102 | return -1; | |
103 | #endif | |
104 | ||
105 | case _SC_SAVED_IDS: | |
106 | #if CONF_IS_DEFINED_SET (_POSIX_SAVED_IDS) | |
107 | return 1; | |
108 | #else | |
109 | return -1; | |
110 | #endif | |
111 | ||
112 | case _SC_REALTIME_SIGNALS: | |
113 | #if CONF_IS_DEFINED_SET (_POSIX_REALTIME_SIGNALS) | |
114 | return _POSIX_REALTIME_SIGNALS; | |
115 | #else | |
116 | return -1; | |
117 | #endif | |
118 | ||
119 | case _SC_PRIORITY_SCHEDULING: | |
120 | #if CONF_IS_DEFINED_SET (_POSIX_PRIORITY_SCHEDULING) | |
121 | return _POSIX_PRIORITY_SCHEDULING; | |
122 | #else | |
123 | return -1; | |
124 | #endif | |
125 | ||
126 | case _SC_TIMERS: | |
127 | #if CONF_IS_DEFINED_SET (_POSIX_TIMERS) | |
128 | return _POSIX_TIMERS; | |
129 | #else | |
130 | return -1; | |
131 | #endif | |
132 | ||
133 | case _SC_ASYNCHRONOUS_IO: | |
134 | #if CONF_IS_DEFINED_SET (_POSIX_ASYNCHRONOUS_IO) | |
135 | return _POSIX_ASYNCHRONOUS_IO; | |
136 | #else | |
137 | return -1; | |
138 | #endif | |
139 | ||
140 | case _SC_PRIORITIZED_IO: | |
141 | #if CONF_IS_DEFINED_SET (_POSIX_PRIORITIZED_IO) | |
142 | return _POSIX_PRIORITIZED_IO; | |
143 | #else | |
144 | return -1; | |
145 | #endif | |
146 | ||
147 | case _SC_SYNCHRONIZED_IO: | |
148 | #if CONF_IS_DEFINED_SET (_POSIX_SYNCHRONIZED_IO) | |
149 | return _POSIX_SYNCHRONIZED_IO; | |
150 | #else | |
151 | return -1; | |
152 | #endif | |
153 | ||
154 | case _SC_FSYNC: | |
155 | #if CONF_IS_DEFINED_SET (_POSIX_FSYNC) | |
156 | return _POSIX_FSYNC; | |
157 | #else | |
158 | return -1; | |
159 | #endif | |
160 | ||
161 | case _SC_MAPPED_FILES: | |
162 | #if CONF_IS_DEFINED_SET (_POSIX_MAPPED_FILES) | |
163 | return _POSIX_MAPPED_FILES; | |
164 | #else | |
165 | return -1; | |
166 | #endif | |
167 | ||
168 | case _SC_MEMLOCK: | |
169 | #if CONF_IS_DEFINED_SET (_POSIX_MEMLOCK) | |
170 | return _POSIX_MEMLOCK; | |
171 | #else | |
172 | return -1; | |
173 | #endif | |
174 | ||
175 | case _SC_MEMLOCK_RANGE: | |
176 | #if CONF_IS_DEFINED_SET (_POSIX_MEMLOCK_RANGE) | |
177 | return _POSIX_MEMLOCK_RANGE; | |
178 | #else | |
179 | return -1; | |
180 | #endif | |
181 | ||
182 | case _SC_MEMORY_PROTECTION: | |
183 | #if CONF_IS_DEFINED_SET (_POSIX_MEMORY_PROTECTION) | |
184 | return _POSIX_MEMORY_PROTECTION; | |
185 | #else | |
186 | return -1; | |
187 | #endif | |
188 | ||
189 | case _SC_MESSAGE_PASSING: | |
190 | #if CONF_IS_DEFINED_SET (_POSIX_MESSAGE_PASSING) | |
191 | return _POSIX_MESSAGE_PASSING; | |
192 | #else | |
193 | return -1; | |
194 | #endif | |
195 | ||
196 | case _SC_SEMAPHORES: | |
197 | #if CONF_IS_DEFINED_SET (_POSIX_SEMAPHORES) | |
198 | return _POSIX_SEMAPHORES; | |
199 | #else | |
200 | return -1; | |
201 | #endif | |
202 | ||
203 | case _SC_SHARED_MEMORY_OBJECTS: | |
204 | #if CONF_IS_DEFINED_SET (_POSIX_SHARED_MEMORY_OBJECTS) | |
205 | return _POSIX_SHARED_MEMORY_OBJECTS; | |
206 | #else | |
207 | return -1; | |
208 | #endif | |
209 | ||
210 | case _SC_VERSION: | |
211 | return _POSIX_VERSION; | |
212 | ||
213 | case _SC_PAGESIZE: | |
214 | return __getpagesize (); | |
215 | ||
216 | case _SC_AIO_LISTIO_MAX: | |
217 | #ifdef AIO_LISTIO_MAX | |
218 | return AIO_LISTIO_MAX; | |
219 | #else | |
220 | return -1; | |
221 | #endif | |
222 | ||
223 | case _SC_AIO_MAX: | |
224 | #ifdef AIO_MAX | |
225 | return AIO_MAX; | |
226 | #else | |
227 | return -1; | |
228 | #endif | |
229 | ||
230 | case _SC_AIO_PRIO_DELTA_MAX: | |
231 | #ifdef AIO_PRIO_DELTA_MAX | |
232 | return AIO_PRIO_DELTA_MAX; | |
233 | #else | |
234 | return -1; | |
235 | #endif | |
236 | ||
237 | case _SC_DELAYTIMER_MAX: | |
238 | #ifdef DELAYTIMER_MAX | |
239 | return DELAYTIMER_MAX; | |
240 | #else | |
241 | return -1; | |
242 | #endif | |
243 | ||
244 | case _SC_MQ_OPEN_MAX: | |
245 | #ifdef MQ_OPEN_MAX | |
246 | return MQ_OPEN_MAX; | |
247 | #else | |
248 | return -1; | |
249 | #endif | |
250 | ||
251 | case _SC_MQ_PRIO_MAX: | |
252 | #ifdef MQ_PRIO_MAX | |
253 | return MQ_PRIO_MAX; | |
254 | #else | |
255 | return -1; | |
256 | #endif | |
257 | ||
258 | case _SC_RTSIG_MAX: | |
259 | #ifdef RTSIG_MAX | |
260 | return RTSIG_MAX; | |
261 | #else | |
262 | return -1; | |
263 | #endif | |
264 | ||
265 | case _SC_SEM_NSEMS_MAX: | |
266 | #ifdef SEM_NSEMS_MAX | |
267 | return SEM_NSEMS_MAX; | |
268 | #else | |
269 | return -1; | |
270 | #endif | |
271 | ||
272 | case _SC_SEM_VALUE_MAX: | |
273 | #ifdef SEM_VALUE_MAX | |
274 | return SEM_VALUE_MAX; | |
275 | #else | |
276 | return -1; | |
277 | #endif | |
278 | ||
279 | case _SC_SIGQUEUE_MAX: | |
280 | #ifdef SIGQUEUE_MAX | |
281 | return SIGQUEUE_MAX; | |
282 | #else | |
283 | return -1; | |
284 | #endif | |
285 | ||
286 | case _SC_TIMER_MAX: | |
287 | #ifdef TIMER_MAX | |
288 | return TIMER_MAX; | |
289 | #else | |
290 | return -1; | |
291 | #endif | |
292 | ||
293 | case _SC_BC_BASE_MAX: | |
294 | #ifdef BC_BASE_MAX | |
295 | return BC_BASE_MAX; | |
296 | #else | |
297 | return -1; | |
298 | #endif | |
299 | ||
300 | case _SC_BC_DIM_MAX: | |
301 | #ifdef BC_DIM_MAX | |
302 | return BC_DIM_MAX; | |
303 | #else | |
304 | return -1; | |
305 | #endif | |
306 | ||
307 | case _SC_BC_SCALE_MAX: | |
308 | #ifdef BC_SCALE_MAX | |
309 | return BC_SCALE_MAX; | |
310 | #else | |
311 | return -1; | |
312 | #endif | |
313 | ||
314 | case _SC_BC_STRING_MAX: | |
315 | #ifdef BC_STRING_MAX | |
316 | return BC_STRING_MAX; | |
317 | #else | |
318 | return -1; | |
319 | #endif | |
320 | ||
321 | case _SC_COLL_WEIGHTS_MAX: | |
322 | #ifdef COLL_WEIGHTS_MAX | |
323 | return COLL_WEIGHTS_MAX; | |
324 | #else | |
325 | return -1; | |
326 | #endif | |
327 | ||
328 | case _SC_EXPR_NEST_MAX: | |
329 | #ifdef EXPR_NEST_MAX | |
330 | return EXPR_NEST_MAX; | |
331 | #else | |
332 | return -1; | |
333 | #endif | |
334 | ||
335 | case _SC_LINE_MAX: | |
336 | #ifdef LINE_MAX | |
337 | return LINE_MAX; | |
338 | #else | |
339 | return -1; | |
340 | #endif | |
341 | ||
342 | case _SC_RE_DUP_MAX: | |
343 | #ifdef RE_DUP_MAX | |
344 | return RE_DUP_MAX; | |
345 | #else | |
346 | return -1; | |
347 | #endif | |
348 | ||
349 | case _SC_CHARCLASS_NAME_MAX: | |
350 | #ifdef CHARCLASS_NAME_MAX | |
351 | return CHARCLASS_NAME_MAX; | |
352 | #else | |
353 | return -1; | |
354 | #endif | |
355 | ||
356 | case _SC_PII: | |
357 | #if CONF_IS_DEFINED_SET (_POSIX_PII) | |
358 | return 1; | |
359 | #else | |
360 | return -1; | |
361 | #endif | |
362 | ||
363 | case _SC_PII_XTI: | |
364 | #if CONF_IS_DEFINED_SET (_POSIX_PII_XTI) | |
365 | return 1; | |
366 | #else | |
367 | return -1; | |
368 | #endif | |
369 | ||
370 | case _SC_PII_SOCKET: | |
371 | #if CONF_IS_DEFINED_SET (_POSIX_PII_SOCKET) | |
372 | return 1; | |
373 | #else | |
374 | return -1; | |
375 | #endif | |
376 | ||
377 | case _SC_PII_INTERNET: | |
378 | #if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET) | |
379 | return 1; | |
380 | #else | |
381 | return -1; | |
382 | #endif | |
383 | ||
384 | case _SC_PII_OSI: | |
385 | #if CONF_IS_DEFINED_SET (_POSIX_PII_OSI) | |
386 | return 1; | |
387 | #else | |
388 | return -1; | |
389 | #endif | |
390 | ||
391 | case _SC_POLL: | |
392 | #if CONF_IS_DEFINED_SET (_POSIX_POLL) | |
393 | return 1; | |
394 | #else | |
395 | return -1; | |
396 | #endif | |
397 | ||
398 | case _SC_SELECT: | |
399 | #if CONF_IS_DEFINED_SET (_POSIX_SELECT) | |
400 | return 1; | |
401 | #else | |
402 | return -1; | |
403 | #endif | |
404 | ||
405 | /* The same as _SC_IOV_MAX. */ | |
406 | case _SC_UIO_MAXIOV: | |
407 | #ifdef UIO_MAXIOV | |
408 | return UIO_MAXIOV; | |
409 | #else | |
410 | return -1; | |
411 | #endif | |
412 | ||
413 | case _SC_PII_INTERNET_STREAM: | |
414 | #if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET_STREAM) | |
415 | return 1; | |
416 | #else | |
417 | return -1; | |
418 | #endif | |
419 | ||
420 | case _SC_PII_INTERNET_DGRAM: | |
421 | #if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET_DGRAM) | |
422 | return 1; | |
423 | #else | |
424 | return -1; | |
425 | #endif | |
426 | ||
427 | case _SC_PII_OSI_COTS: | |
428 | #if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_COTS) | |
429 | return 1; | |
430 | #else | |
431 | return -1; | |
432 | #endif | |
433 | ||
434 | case _SC_PII_OSI_CLTS: | |
435 | #if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_CLTS) | |
436 | return 1; | |
437 | #else | |
438 | return -1; | |
439 | #endif | |
440 | ||
441 | case _SC_PII_OSI_M: | |
442 | #if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_M) | |
443 | return 1; | |
444 | #else | |
445 | return -1; | |
446 | #endif | |
447 | ||
448 | case _SC_T_IOV_MAX: | |
449 | #ifdef _T_IOV_MAX | |
450 | return _T_IOV_MAX; | |
451 | #else | |
452 | return -1; | |
453 | #endif | |
454 | ||
455 | case _SC_2_VERSION: | |
456 | return _POSIX2_VERSION; | |
457 | ||
458 | case _SC_2_C_BIND: | |
459 | #ifdef _POSIX2_C_BIND | |
460 | return _POSIX2_C_BIND; | |
461 | #else | |
462 | return -1; | |
463 | #endif | |
464 | ||
465 | case _SC_2_C_DEV: | |
466 | #ifdef _POSIX2_C_DEV | |
467 | return _POSIX2_C_DEV; | |
468 | #else | |
469 | return -1; | |
470 | #endif | |
471 | ||
472 | case _SC_2_C_VERSION: | |
473 | #ifdef _POSIX2_C_VERSION | |
474 | return _POSIX2_C_VERSION; | |
475 | #else | |
476 | return -1; | |
477 | #endif | |
478 | ||
479 | case _SC_2_FORT_DEV: | |
480 | #ifdef _POSIX2_FORT_DEV | |
481 | return _POSIX2_FORT_DEV; | |
482 | #else | |
483 | return -1; | |
484 | #endif | |
485 | ||
486 | case _SC_2_FORT_RUN: | |
487 | #ifdef _POSIX2_FORT_RUN | |
488 | return _POSIX2_FORT_RUN; | |
489 | #else | |
490 | return -1; | |
491 | #endif | |
492 | ||
493 | case _SC_2_LOCALEDEF: | |
494 | #ifdef _POSIX2_LOCALEDEF | |
495 | return _POSIX2_LOCALEDEF; | |
496 | #else | |
497 | return -1; | |
498 | #endif | |
499 | ||
500 | case _SC_2_SW_DEV: | |
501 | #ifdef _POSIX2_SW_DEV | |
502 | return _POSIX2_SW_DEV; | |
503 | #else | |
504 | return -1; | |
505 | #endif | |
506 | ||
507 | case _SC_2_CHAR_TERM: | |
508 | #ifdef _POSIX2_CHAR_TERM | |
509 | return _POSIX2_CHAR_TERM; | |
510 | #else | |
511 | return -1; | |
512 | #endif | |
513 | ||
514 | case _SC_2_UPE: | |
515 | #ifdef _POSIX2_UPE | |
516 | return _POSIX2_UPE; | |
517 | #else | |
518 | return -1; | |
519 | #endif | |
520 | ||
521 | /* POSIX 1003.1c (POSIX Threads). */ | |
522 | case _SC_THREADS: | |
523 | #if CONF_IS_DEFINED_SET (_POSIX_THREADS) | |
524 | return _POSIX_THREADS; | |
525 | #else | |
526 | return -1; | |
527 | #endif | |
528 | ||
529 | case _SC_THREAD_SAFE_FUNCTIONS: | |
530 | #if CONF_IS_DEFINED_SET (_POSIX_THREAD_SAFE_FUNCTIONS) | |
531 | return _POSIX_THREAD_SAFE_FUNCTIONS; | |
532 | #else | |
533 | return -1; | |
534 | #endif | |
535 | ||
536 | case _SC_GETGR_R_SIZE_MAX: | |
537 | return NSS_BUFLEN_GROUP; | |
538 | ||
539 | case _SC_GETPW_R_SIZE_MAX: | |
540 | return NSS_BUFLEN_PASSWD; | |
541 | ||
542 | case _SC_LOGIN_NAME_MAX: | |
543 | #ifdef LOGIN_NAME_MAX | |
544 | return LOGIN_NAME_MAX; | |
545 | #else | |
546 | return -1; | |
547 | #endif | |
548 | ||
549 | case _SC_TTY_NAME_MAX: | |
550 | #ifdef TTY_NAME_MAX | |
551 | return TTY_NAME_MAX; | |
552 | #else | |
553 | return -1; | |
554 | #endif | |
555 | ||
556 | case _SC_THREAD_DESTRUCTOR_ITERATIONS: | |
557 | #if CONF_IS_DEFINED_SET (_POSIX_THREAD_DESTRUCTOR_ITERATIONS) | |
558 | return _POSIX_THREAD_DESTRUCTOR_ITERATIONS; | |
559 | #else | |
560 | return -1; | |
561 | #endif | |
562 | ||
563 | case _SC_THREAD_KEYS_MAX: | |
564 | #ifdef PTHREAD_KEYS_MAX | |
565 | return PTHREAD_KEYS_MAX; | |
566 | #else | |
567 | return -1; | |
568 | #endif | |
569 | ||
570 | case _SC_THREAD_STACK_MIN: | |
571 | #ifdef PTHREAD_STACK_MIN | |
572 | return PTHREAD_STACK_MIN; | |
573 | #else | |
574 | return -1; | |
575 | #endif | |
576 | ||
577 | case _SC_THREAD_THREADS_MAX: | |
578 | #ifdef PTHREAD_THREADS_MAX | |
579 | return PTHREAD_THREADS_MAX; | |
580 | #else | |
581 | return -1; | |
582 | #endif | |
583 | ||
584 | case _SC_THREAD_ATTR_STACKADDR: | |
585 | #if CONF_IS_DEFINED_SET (_POSIX_THREAD_ATTR_STACKADDR) | |
586 | return _POSIX_THREAD_ATTR_STACKADDR; | |
587 | #else | |
588 | return -1; | |
589 | #endif | |
590 | ||
591 | case _SC_THREAD_ATTR_STACKSIZE: | |
592 | #if CONF_IS_DEFINED_SET (_POSIX_THREAD_ATTR_STACKSIZE) | |
593 | return _POSIX_THREAD_ATTR_STACKSIZE; | |
594 | #else | |
595 | return -1; | |
596 | #endif | |
597 | ||
598 | case _SC_THREAD_PRIORITY_SCHEDULING: | |
599 | #if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIORITY_SCHEDULING) | |
600 | return _POSIX_THREAD_PRIORITY_SCHEDULING; | |
601 | #else | |
602 | return -1; | |
603 | #endif | |
604 | ||
605 | case _SC_THREAD_PRIO_INHERIT: | |
606 | #if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIO_INHERIT) | |
607 | return _POSIX_THREAD_PRIO_INHERIT; | |
608 | #else | |
609 | return -1; | |
610 | #endif | |
611 | ||
612 | case _SC_THREAD_PRIO_PROTECT: | |
613 | #if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIO_PROTECT) | |
614 | return _POSIX_THREAD_PRIO_PROTECT; | |
615 | #else | |
616 | return -1; | |
617 | #endif | |
618 | ||
619 | case _SC_THREAD_PROCESS_SHARED: | |
620 | #if CONF_IS_DEFINED_SET (_POSIX_THREAD_PROCESS_SHARED) | |
621 | return _POSIX_THREAD_PROCESS_SHARED; | |
622 | #else | |
623 | return -1; | |
624 | #endif | |
625 | ||
626 | case _SC_NPROCESSORS_CONF: | |
627 | return __get_nprocs_conf (); | |
628 | ||
629 | case _SC_NPROCESSORS_ONLN: | |
630 | return __get_nprocs (); | |
631 | ||
632 | case _SC_PHYS_PAGES: | |
633 | return __get_phys_pages (); | |
634 | ||
635 | case _SC_AVPHYS_PAGES: | |
636 | return __get_avphys_pages (); | |
637 | ||
638 | case _SC_ATEXIT_MAX: | |
639 | /* We have no limit since we use lists. */ | |
640 | return INT_MAX; | |
641 | ||
642 | case _SC_PASS_MAX: | |
643 | /* We have no limit but since the return value might be used to | |
644 | allocate a buffer we restrict the value. */ | |
645 | return BUFSIZ; | |
646 | ||
647 | case _SC_XOPEN_VERSION: | |
648 | return _XOPEN_VERSION; | |
649 | ||
650 | case _SC_XOPEN_XCU_VERSION: | |
651 | return _XOPEN_XCU_VERSION; | |
652 | ||
653 | case _SC_XOPEN_UNIX: | |
654 | return _XOPEN_UNIX; | |
655 | ||
656 | case _SC_XOPEN_CRYPT: | |
657 | #ifdef _XOPEN_CRYPT | |
658 | return _XOPEN_CRYPT; | |
659 | #else | |
660 | return -1; | |
661 | #endif | |
662 | ||
663 | case _SC_XOPEN_ENH_I18N: | |
664 | #ifdef _XOPEN_ENH_I18N | |
665 | return _XOPEN_ENH_I18N; | |
666 | #else | |
667 | return -1; | |
668 | #endif | |
669 | ||
670 | case _SC_XOPEN_SHM: | |
671 | #ifdef _XOPEN_SHM | |
672 | return _XOPEN_SHM; | |
673 | #else | |
674 | return -1; | |
675 | #endif | |
676 | ||
677 | case _SC_XOPEN_XPG2: | |
678 | #ifdef _XOPEN_XPG2 | |
679 | return _XOPEN_XPG2; | |
680 | #else | |
681 | return -1; | |
682 | #endif | |
683 | ||
684 | case _SC_XOPEN_XPG3: | |
685 | #ifdef _XOPEN_XPG3 | |
686 | return _XOPEN_XPG3; | |
687 | #else | |
688 | return -1; | |
689 | #endif | |
690 | ||
691 | case _SC_XOPEN_XPG4: | |
692 | #ifdef _XOPEN_XPG4 | |
693 | return _XOPEN_XPG4; | |
694 | #else | |
695 | return -1; | |
696 | #endif | |
697 | ||
698 | case _SC_CHAR_BIT: | |
699 | return CHAR_BIT; | |
700 | ||
701 | case _SC_CHAR_MAX: | |
702 | return CHAR_MAX; | |
703 | ||
704 | case _SC_CHAR_MIN: | |
705 | return CHAR_MIN; | |
706 | ||
707 | case _SC_INT_MAX: | |
708 | return INT_MAX; | |
709 | ||
710 | case _SC_INT_MIN: | |
711 | return INT_MIN; | |
712 | ||
713 | case _SC_LONG_BIT: | |
714 | return sizeof (long int) * CHAR_BIT; | |
715 | ||
716 | case _SC_WORD_BIT: | |
717 | return sizeof (int) * CHAR_BIT; | |
718 | ||
719 | case _SC_MB_LEN_MAX: | |
720 | return MB_LEN_MAX; | |
721 | ||
722 | case _SC_NZERO: | |
723 | return NZERO; | |
724 | ||
725 | case _SC_SSIZE_MAX: | |
726 | return _POSIX_SSIZE_MAX; | |
727 | ||
728 | case _SC_SCHAR_MAX: | |
729 | return SCHAR_MAX; | |
730 | ||
731 | case _SC_SCHAR_MIN: | |
732 | return SCHAR_MIN; | |
733 | ||
734 | case _SC_SHRT_MAX: | |
735 | return SHRT_MAX; | |
736 | ||
737 | case _SC_SHRT_MIN: | |
738 | return SHRT_MIN; | |
739 | ||
740 | case _SC_UCHAR_MAX: | |
741 | return UCHAR_MAX; | |
742 | ||
743 | case _SC_UINT_MAX: | |
744 | return UINT_MAX; | |
745 | ||
746 | case _SC_ULONG_MAX: | |
747 | return ULONG_MAX; | |
748 | ||
749 | case _SC_USHRT_MAX: | |
750 | return USHRT_MAX; | |
751 | ||
752 | case _SC_NL_ARGMAX: | |
753 | #ifdef NL_ARGMAX | |
754 | return NL_ARGMAX; | |
755 | #else | |
756 | return -1; | |
757 | #endif | |
758 | ||
759 | case _SC_NL_LANGMAX: | |
760 | #ifdef NL_LANGMAX | |
761 | return NL_LANGMAX; | |
762 | #else | |
763 | return -1; | |
764 | #endif | |
765 | ||
766 | case _SC_NL_MSGMAX: | |
767 | #ifdef NL_MSGMAX | |
768 | return NL_MSGMAX; | |
769 | #else | |
770 | return -1; | |
771 | #endif | |
772 | ||
773 | case _SC_NL_NMAX: | |
774 | #ifdef NL_NMAX | |
775 | return NL_NMAX; | |
776 | #else | |
777 | return -1; | |
778 | #endif | |
779 | ||
780 | case _SC_NL_SETMAX: | |
781 | #ifdef NL_SETMAX | |
782 | return NL_SETMAX; | |
783 | #else | |
784 | return -1; | |
785 | #endif | |
786 | ||
787 | case _SC_NL_TEXTMAX: | |
788 | #ifdef NL_TEXTMAX | |
789 | return NL_TEXTMAX; | |
790 | #else | |
791 | return -1; | |
792 | #endif | |
793 | ||
794 | #define START_ENV_GROUP(VERSION) \ | |
795 | /* Empty. */ | |
796 | ||
797 | #define END_ENV_GROUP(VERSION) \ | |
798 | /* Empty. */ | |
799 | ||
800 | #define KNOWN_ABSENT_ENVIRONMENT(SC_PREFIX, ENV_PREFIX, SUFFIX) \ | |
801 | case _SC_##SC_PREFIX##_##SUFFIX: \ | |
802 | return _##ENV_PREFIX##_##SUFFIX; | |
803 | ||
804 | #define KNOWN_PRESENT_ENVIRONMENT(SC_PREFIX, ENV_PREFIX, SUFFIX) \ | |
805 | case _SC_##SC_PREFIX##_##SUFFIX: \ | |
806 | return _##ENV_PREFIX##_##SUFFIX; | |
807 | ||
808 | #define UNKNOWN_ENVIRONMENT(SC_PREFIX, ENV_PREFIX, SUFFIX) \ | |
809 | case _SC_##SC_PREFIX##_##SUFFIX: \ | |
810 | return __sysconf_check_spec (#SUFFIX); | |
811 | ||
812 | #include <posix/posix-envs.def> | |
813 | ||
814 | #undef START_ENV_GROUP | |
815 | #undef END_ENV_GROUP | |
816 | #undef KNOWN_ABSENT_ENVIRONMENT | |
817 | #undef KNOWN_PRESENT_ENVIRONMENT | |
818 | #undef UNKNOWN_ENVIRONMENT | |
819 | ||
820 | case _SC_XOPEN_LEGACY: | |
821 | return _XOPEN_LEGACY; | |
822 | ||
823 | case _SC_XOPEN_REALTIME: | |
824 | #ifdef _XOPEN_REALTIME | |
825 | return _XOPEN_REALTIME; | |
826 | #else | |
827 | return -1; | |
828 | #endif | |
829 | case _SC_XOPEN_REALTIME_THREADS: | |
830 | #ifdef _XOPEN_REALTIME_THREADS | |
831 | return _XOPEN_REALTIME_THREADS; | |
832 | #else | |
833 | return -1; | |
834 | #endif | |
835 | ||
836 | case _SC_ADVISORY_INFO: | |
837 | #if CONF_IS_DEFINED_SET (_POSIX_ADVISORY_INFO) | |
838 | return _POSIX_ADVISORY_INFO; | |
839 | #else | |
840 | return -1; | |
841 | #endif | |
842 | ||
843 | case _SC_BARRIERS: | |
844 | #if CONF_IS_DEFINED_SET (_POSIX_BARRIERS) | |
845 | return _POSIX_BARRIERS; | |
846 | #else | |
847 | return -1; | |
848 | #endif | |
849 | ||
850 | case _SC_BASE: | |
851 | #if CONF_IS_DEFINED_SET (_POSIX_BASE) | |
852 | return _POSIX_BASE; | |
853 | #else | |
854 | return -1; | |
855 | #endif | |
856 | case _SC_C_LANG_SUPPORT: | |
857 | #if CONF_IS_DEFINED_SET (_POSIX_C_LANG_SUPPORT) | |
858 | return _POSIX_C_LANG_SUPPORT; | |
859 | #else | |
860 | return -1; | |
861 | #endif | |
862 | case _SC_C_LANG_SUPPORT_R: | |
863 | #if CONF_IS_DEFINED_SET (_POSIX_C_LANG_SUPPORT_R) | |
864 | return _POSIX_C_LANG_SUPPORT_R; | |
865 | #else | |
866 | return -1; | |
867 | #endif | |
868 | ||
869 | case _SC_CLOCK_SELECTION: | |
870 | #if CONF_IS_DEFINED_SET (_POSIX_CLOCK_SELECTION) | |
871 | return _POSIX_CLOCK_SELECTION; | |
872 | #else | |
873 | return -1; | |
874 | #endif | |
875 | ||
876 | case _SC_CPUTIME: | |
877 | #if CONF_IS_DEFINED_SET (_POSIX_CPUTIME) | |
878 | return _POSIX_CPUTIME; | |
879 | #else | |
880 | return -1; | |
881 | #endif | |
882 | ||
883 | case _SC_DEVICE_IO: | |
884 | #if CONF_IS_DEFINED_SET (_POSIX_DEVICE_IO) | |
885 | return _POSIX_DEVICE_IO; | |
886 | #else | |
887 | return -1; | |
888 | #endif | |
889 | case _SC_DEVICE_SPECIFIC: | |
890 | #if CONF_IS_DEFINED_SET (_POSIX_DEVICE_SPECIFIC) | |
891 | return _POSIX_DEVICE_SPECIFIC; | |
892 | #else | |
893 | return -1; | |
894 | #endif | |
895 | case _SC_DEVICE_SPECIFIC_R: | |
896 | #if CONF_IS_DEFINED_SET (_POSIX_DEVICE_SPECIFIC_R) | |
897 | return _POSIX_DEVICE_SPECIFIC_R; | |
898 | #else | |
899 | return -1; | |
900 | #endif | |
901 | ||
902 | case _SC_FD_MGMT: | |
903 | #if CONF_IS_DEFINED_SET (_POSIX_FD_MGMT) | |
904 | return _POSIX_FD_MGMT; | |
905 | #else | |
906 | return -1; | |
907 | #endif | |
908 | ||
909 | case _SC_FIFO: | |
910 | #if CONF_IS_DEFINED_SET (_POSIX_FIFO) | |
911 | return _POSIX_FIFO; | |
912 | #else | |
913 | return -1; | |
914 | #endif | |
915 | case _SC_PIPE: | |
916 | #if CONF_IS_DEFINED_SET (_POSIX_PIPE) | |
917 | return _POSIX_PIPE; | |
918 | #else | |
919 | return -1; | |
920 | #endif | |
921 | ||
922 | case _SC_FILE_ATTRIBUTES: | |
923 | #if CONF_IS_DEFINED_SET (_POSIX_FILE_ATTRIBUTES) | |
924 | return _POSIX_FILE_ATTRIBUTES; | |
925 | #else | |
926 | return -1; | |
927 | #endif | |
928 | case _SC_FILE_LOCKING: | |
929 | #if CONF_IS_DEFINED_SET (_POSIX_FILE_LOCKING) | |
930 | return _POSIX_FILE_LOCKING; | |
931 | #else | |
932 | return -1; | |
933 | #endif | |
934 | case _SC_FILE_SYSTEM: | |
935 | #if CONF_IS_DEFINED_SET (_POSIX_FILE_SYSTEM) | |
936 | return _POSIX_FILE_SYSTEM; | |
937 | #else | |
938 | return -1; | |
939 | #endif | |
940 | ||
941 | case _SC_MONOTONIC_CLOCK: | |
942 | #if CONF_IS_DEFINED_SET (_POSIX_MONOTONIC_CLOCK) | |
943 | return _POSIX_MONOTONIC_CLOCK; | |
944 | #else | |
945 | return -1; | |
946 | #endif | |
947 | ||
948 | case _SC_MULTI_PROCESS: | |
949 | #if CONF_IS_DEFINED_SET (_POSIX_MULTI_PROCESS) | |
950 | return _POSIX_MULTI_PROCESS; | |
951 | #else | |
952 | return -1; | |
953 | #endif | |
954 | case _SC_SINGLE_PROCESS: | |
955 | #if CONF_IS_DEFINED_SET (_POSIX_SINGLE_PROCESS) | |
956 | return _POSIX_SINGLE_PROCESS; | |
957 | #else | |
958 | return -1; | |
959 | #endif | |
960 | ||
961 | case _SC_NETWORKING: | |
962 | #if CONF_IS_DEFINED_SET (_POSIX_NETWORKING) | |
963 | return _POSIX_NETWORKING; | |
964 | #else | |
965 | return -1; | |
966 | #endif | |
967 | ||
968 | case _SC_READER_WRITER_LOCKS: | |
969 | #if CONF_IS_DEFINED_SET (_POSIX_READER_WRITER_LOCKS) | |
970 | return _POSIX_READER_WRITER_LOCKS; | |
971 | #else | |
972 | return -1; | |
973 | #endif | |
974 | case _SC_SPIN_LOCKS: | |
975 | #if CONF_IS_DEFINED_SET (_POSIX_SPIN_LOCKS) | |
976 | return _POSIX_SPIN_LOCKS; | |
977 | #else | |
978 | return -1; | |
979 | #endif | |
980 | ||
981 | case _SC_REGEXP: | |
982 | #if CONF_IS_DEFINED_SET (_POSIX_REGEXP) | |
983 | return _POSIX_REGEXP; | |
984 | #else | |
985 | return -1; | |
986 | #endif | |
987 | /* _REGEX_VERSION has been removed with IEEE Std 1003.1-2001/Cor 2-2004, | |
988 | item XSH/TC2/D6/137. */ | |
989 | case _SC_REGEX_VERSION: | |
990 | return -1; | |
991 | ||
992 | case _SC_SHELL: | |
993 | #if CONF_IS_DEFINED_SET (_POSIX_SHELL) | |
994 | return _POSIX_SHELL; | |
995 | #else | |
996 | return -1; | |
997 | #endif | |
998 | ||
999 | case _SC_SIGNALS: | |
1000 | #if CONF_IS_DEFINED (_POSIX_SIGNALS) | |
1001 | return _POSIX_SIGNALS; | |
1002 | #else | |
1003 | return -1; | |
1004 | #endif | |
1005 | ||
1006 | case _SC_SPAWN: | |
1007 | #if CONF_IS_DEFINED_SET (_POSIX_SPAWN) | |
1008 | return _POSIX_SPAWN; | |
1009 | #else | |
1010 | return -1; | |
1011 | #endif | |
1012 | ||
1013 | case _SC_SPORADIC_SERVER: | |
1014 | #if CONF_IS_DEFINED_SET (_POSIX_SPORADIC_SERVER) | |
1015 | return _POSIX_SPORADIC_SERVER; | |
1016 | #else | |
1017 | return -1; | |
1018 | #endif | |
1019 | case _SC_THREAD_SPORADIC_SERVER: | |
1020 | #if CONF_IS_DEFINED_SET (_POSIX_THREAD_SPORADIC_SERVER) | |
1021 | return _POSIX_THREAD_SPORADIC_SERVER; | |
1022 | #else | |
1023 | return -1; | |
1024 | #endif | |
1025 | ||
1026 | case _SC_SYSTEM_DATABASE: | |
1027 | #if CONF_IS_DEFINED_SET (_POSIX_SYSTEM_DATABASE) | |
1028 | return _POSIX_SYSTEM_DATABASE; | |
1029 | #else | |
1030 | return -1; | |
1031 | #endif | |
1032 | case _SC_SYSTEM_DATABASE_R: | |
1033 | #if CONF_IS_DEFINED_SET (_POSIX_SYSTEM_DATABASE_R) | |
1034 | return _POSIX_SYSTEM_DATABASE_R; | |
1035 | #else | |
1036 | return -1; | |
1037 | #endif | |
1038 | ||
1039 | case _SC_THREAD_CPUTIME: | |
1040 | #if CONF_IS_DEFINED_SET (_POSIX_THREAD_CPUTIME) | |
1041 | return _POSIX_THREAD_CPUTIME; | |
1042 | #else | |
1043 | return -1; | |
1044 | #endif | |
1045 | ||
1046 | case _SC_TIMEOUTS: | |
1047 | #if CONF_IS_DEFINED_SET (_POSIX_TIMEOUTS) | |
1048 | return _POSIX_TIMEOUTS; | |
1049 | #else | |
1050 | return -1; | |
1051 | #endif | |
1052 | ||
1053 | case _SC_TYPED_MEMORY_OBJECTS: | |
1054 | #if CONF_IS_DEFINED_SET (_POSIX_TYPED_MEMORY_OBJECTS) | |
1055 | return _POSIX_TYPED_MEMORY_OBJECTS; | |
1056 | #else | |
1057 | return -1; | |
1058 | #endif | |
1059 | ||
1060 | case _SC_USER_GROUPS: | |
1061 | #if CONF_IS_DEFINED_SET (_POSIX_USER_GROUPS) | |
1062 | return _POSIX_USER_GROUPS; | |
1063 | #else | |
1064 | return -1; | |
1065 | #endif | |
1066 | case _SC_USER_GROUPS_R: | |
1067 | #if CONF_IS_DEFINED_SET (_POSIX_USER_GROUPS_R) | |
1068 | return _POSIX_USER_GROUPS_R; | |
1069 | #else | |
1070 | return -1; | |
1071 | #endif | |
1072 | ||
1073 | case _SC_2_PBS: | |
1074 | #ifdef _POSIX2_PBS | |
1075 | return _POSIX2_PBS; | |
1076 | #else | |
1077 | return -1; | |
1078 | #endif | |
1079 | case _SC_2_PBS_ACCOUNTING: | |
1080 | #ifdef _POSIX2_PBS_ACCOUNTING | |
1081 | return _POSIX2_PBS_ACCOUNTING; | |
1082 | #else | |
1083 | return -1; | |
1084 | #endif | |
1085 | case _SC_2_PBS_CHECKPOINT: | |
1086 | #ifdef _POSIX2_PBS_CHECKPOINT | |
1087 | return _POSIX2_PBS_CHECKPOINT; | |
1088 | #else | |
1089 | return -1; | |
1090 | #endif | |
1091 | case _SC_2_PBS_LOCATE: | |
1092 | #ifdef _POSIX2_PBS_LOCATE | |
1093 | return _POSIX2_PBS_LOCATE; | |
1094 | #else | |
1095 | return -1; | |
1096 | #endif | |
1097 | case _SC_2_PBS_MESSAGE: | |
1098 | #ifdef _POSIX2_PBS_MESSAGE | |
1099 | return _POSIX2_PBS_MESSAGE; | |
1100 | #else | |
1101 | return -1; | |
1102 | #endif | |
1103 | case _SC_2_PBS_TRACK: | |
1104 | #ifdef _POSIX2_PBS_TRACK | |
1105 | return _POSIX2_PBS_TRACK; | |
1106 | #else | |
1107 | return -1; | |
1108 | #endif | |
1109 | ||
1110 | case _SC_SYMLOOP_MAX: | |
1111 | #ifdef SYMLOOP_MAX | |
1112 | return SYMLOOP_MAX; | |
1113 | #else | |
1114 | return -1; | |
1115 | #endif | |
1116 | ||
1117 | case _SC_STREAMS: | |
1118 | #ifdef _XOPEN_STREAMS | |
1119 | return _XOPEN_STREAMS; | |
1120 | #else | |
1121 | return -1; | |
1122 | #endif | |
1123 | ||
1124 | case _SC_HOST_NAME_MAX: | |
1125 | #ifdef HOST_NAME_MAX | |
1126 | return HOST_NAME_MAX; | |
1127 | #else | |
1128 | return -1; | |
1129 | #endif | |
1130 | ||
1131 | case _SC_TRACE: | |
1132 | #if CONF_IS_DEFINED_SET (_POSIX_TRACE) | |
1133 | return _POSIX_TRACE; | |
1134 | #else | |
1135 | return -1; | |
1136 | #endif | |
1137 | case _SC_TRACE_EVENT_FILTER: | |
1138 | #if CONF_IS_DEFINED_SET (_POSIX_TRACE_EVENT_FILTER) | |
1139 | return _POSIX_TRACE_EVENT_FILTER; | |
1140 | #else | |
1141 | return -1; | |
1142 | #endif | |
1143 | case _SC_TRACE_INHERIT: | |
1144 | #if CONF_IS_DEFINED_SET (_POSIX_TRACE_INHERIT) | |
1145 | return _POSIX_TRACE_INHERIT; | |
1146 | #else | |
1147 | return -1; | |
1148 | #endif | |
1149 | case _SC_TRACE_LOG: | |
1150 | #if CONF_IS_DEFINED_SET (_POSIX_TRACE_LOG) | |
1151 | return _POSIX_TRACE_LOG; | |
1152 | #else | |
1153 | return -1; | |
1154 | #endif | |
1155 | ||
1156 | case _SC_TRACE_EVENT_NAME_MAX: | |
1157 | case _SC_TRACE_NAME_MAX: | |
1158 | case _SC_TRACE_SYS_MAX: | |
1159 | case _SC_TRACE_USER_EVENT_MAX: | |
1160 | /* No support for tracing. */ | |
1161 | ||
1162 | case _SC_XOPEN_STREAMS: | |
1163 | /* No support for STREAMS. */ | |
1164 | return -1; | |
1165 | ||
1166 | case _SC_LEVEL1_ICACHE_SIZE: | |
1167 | case _SC_LEVEL1_ICACHE_ASSOC: | |
1168 | case _SC_LEVEL1_ICACHE_LINESIZE: | |
1169 | case _SC_LEVEL1_DCACHE_SIZE: | |
1170 | case _SC_LEVEL1_DCACHE_ASSOC: | |
1171 | case _SC_LEVEL1_DCACHE_LINESIZE: | |
1172 | case _SC_LEVEL2_CACHE_SIZE: | |
1173 | case _SC_LEVEL2_CACHE_ASSOC: | |
1174 | case _SC_LEVEL2_CACHE_LINESIZE: | |
1175 | case _SC_LEVEL3_CACHE_SIZE: | |
1176 | case _SC_LEVEL3_CACHE_ASSOC: | |
1177 | case _SC_LEVEL3_CACHE_LINESIZE: | |
1178 | case _SC_LEVEL4_CACHE_SIZE: | |
1179 | case _SC_LEVEL4_CACHE_ASSOC: | |
1180 | case _SC_LEVEL4_CACHE_LINESIZE: | |
1181 | /* In general we cannot determine these values. Therefore we | |
1182 | return zero which indicates that no information is | |
1183 | available. */ | |
1184 | return 0; | |
1185 | ||
1186 | case _SC_IPV6: | |
1187 | #if CONF_IS_DEFINED_SET (_POSIX_IPV6) | |
1188 | return _POSIX_IPV6; | |
1189 | #else | |
1190 | return -1; | |
1191 | #endif | |
1192 | ||
1193 | case _SC_RAW_SOCKETS: | |
1194 | #if CONF_IS_DEFINED_SET (_POSIX_RAW_SOCKETS) | |
1195 | return _POSIX_RAW_SOCKETS; | |
1196 | #else | |
1197 | return -1; | |
1198 | #endif | |
1199 | } | |
1200 | } | |
1201 | ||
1202 | #undef __sysconf | |
1203 | weak_alias (__sysconf, sysconf) | |
1204 | libc_hidden_def (__sysconf) | |
1205 | ||
1206 | #if NEED_CHECK_SPEC | |
1207 | static long int | |
1208 | __sysconf_check_spec (const char *spec) | |
1209 | { | |
1210 | int save_errno = errno; | |
1211 | ||
1212 | const char *getconf_dir = __libc_secure_getenv ("GETCONF_DIR") ?: GETCONF_DIR; | |
1213 | size_t getconf_dirlen = strlen (getconf_dir); | |
1214 | size_t speclen = strlen (spec); | |
1215 | ||
1216 | char name[getconf_dirlen + sizeof ("/POSIX_V6_") + speclen]; | |
1217 | memcpy (mempcpy (mempcpy (name, getconf_dir, getconf_dirlen), | |
1218 | "/POSIX_V6_", sizeof ("/POSIX_V6_") - 1), | |
1219 | spec, speclen + 1); | |
1220 | ||
1221 | struct stat64 st; | |
1222 | long int ret = __xstat64 (_STAT_VER, name, &st) >= 0 ? 1 : -1; | |
1223 | ||
1224 | __set_errno (save_errno); | |
1225 | return ret; | |
1226 | } | |
1227 | #endif |