1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Sean Eric Fagan of Cygnus Support.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 __SCCSID("@(#)sysconf.c 8.2 (Berkeley) 3/20/94");
37 __FBSDID("$FreeBSD$");
38
39 #include "namespace.h"
40 #include <sys/param.h>
41 #include <sys/time.h>
42 #include <sys/sysctl.h>
43 #include <sys/resource.h>
44 #include <sys/socket.h>
45
46 #include <elf.h>
47 #include <errno.h>
48 #include <limits.h>
49 #include <paths.h>
50 #include <pthread.h> /* we just need the limits */
51 #include <semaphore.h>
52 #include <time.h>
53 #include <unistd.h>
54 #include "un-namespace.h"
55
56 #include "../stdlib/atexit.h"
57 #include "tzfile.h" /* from ../../../contrib/tzcode/stdtime */
58 #include "libc_private.h"
59
60 #define _PATH_ZONEINFO TZDIR /* from tzfile.h */
61
62 /*
63 * sysconf --
64 * get configurable system variables.
65 *
66 * XXX
67 * POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values
68 * not change during the lifetime of the calling process. This would seem
69 * to require that any change to system limits kill all running processes.
70 * A workaround might be to cache the values when they are first retrieved
71 * and then simply return the cached value on subsequent calls. This is
72 * less useful than returning up-to-date values, however.
73 */
74 long
sysconf(int name)75 sysconf(int name)
76 {
77 struct rlimit rl;
78 size_t len;
79 int mib[2], sverrno, value;
80 long lvalue, defaultresult;
81 const char *path;
82
83 defaultresult = -1;
84
85 switch (name) {
86 case _SC_ARG_MAX:
87 mib[0] = CTL_KERN;
88 mib[1] = KERN_ARGMAX;
89 break;
90 case _SC_CHILD_MAX:
91 if (getrlimit(RLIMIT_NPROC, &rl) != 0)
92 return (-1);
93 if (rl.rlim_cur == RLIM_INFINITY)
94 return (-1);
95 if (rl.rlim_cur > LONG_MAX) {
96 errno = EOVERFLOW;
97 return (-1);
98 }
99 return ((long)rl.rlim_cur);
100 case _SC_CLK_TCK:
101 return (CLK_TCK);
102 case _SC_NGROUPS_MAX:
103 mib[0] = CTL_KERN;
104 mib[1] = KERN_NGROUPS;
105 break;
106 case _SC_OPEN_MAX:
107 if (getrlimit(RLIMIT_NOFILE, &rl) != 0)
108 return (-1);
109 if (rl.rlim_cur == RLIM_INFINITY)
110 return (-1);
111 if (rl.rlim_cur > LONG_MAX) {
112 errno = EOVERFLOW;
113 return (-1);
114 }
115 return ((long)rl.rlim_cur);
116 case _SC_STREAM_MAX:
117 if (getrlimit(RLIMIT_NOFILE, &rl) != 0)
118 return (-1);
119 if (rl.rlim_cur == RLIM_INFINITY)
120 return (-1);
121 if (rl.rlim_cur > LONG_MAX) {
122 errno = EOVERFLOW;
123 return (-1);
124 }
125 /*
126 * struct __sFILE currently has a limitation that
127 * file descriptors must fit in a signed short.
128 * This doesn't precisely capture the letter of POSIX
129 * but approximates the spirit.
130 */
131 if (rl.rlim_cur > SHRT_MAX)
132 return (SHRT_MAX);
133
134 return ((long)rl.rlim_cur);
135 case _SC_JOB_CONTROL:
136 return (_POSIX_JOB_CONTROL);
137 case _SC_SAVED_IDS:
138 /* XXX - must be 1 */
139 mib[0] = CTL_KERN;
140 mib[1] = KERN_SAVED_IDS;
141 goto yesno;
142 case _SC_VERSION:
143 mib[0] = CTL_KERN;
144 mib[1] = KERN_POSIX1;
145 break;
146 case _SC_BC_BASE_MAX:
147 return (BC_BASE_MAX);
148 case _SC_BC_DIM_MAX:
149 return (BC_DIM_MAX);
150 case _SC_BC_SCALE_MAX:
151 return (BC_SCALE_MAX);
152 case _SC_BC_STRING_MAX:
153 return (BC_STRING_MAX);
154 case _SC_COLL_WEIGHTS_MAX:
155 return (COLL_WEIGHTS_MAX);
156 case _SC_EXPR_NEST_MAX:
157 return (EXPR_NEST_MAX);
158 case _SC_LINE_MAX:
159 return (LINE_MAX);
160 case _SC_RE_DUP_MAX:
161 return (RE_DUP_MAX);
162 case _SC_2_VERSION:
163 /*
164 * This is something of a lie, but it would be silly at
165 * this point to try to deduce this from the contents
166 * of the filesystem.
167 */
168 return (_POSIX2_VERSION);
169 case _SC_2_C_BIND:
170 return (_POSIX2_C_BIND);
171 case _SC_2_C_DEV:
172 return (_POSIX2_C_DEV);
173 case _SC_2_CHAR_TERM:
174 return (_POSIX2_CHAR_TERM);
175 case _SC_2_FORT_DEV:
176 return (_POSIX2_FORT_DEV);
177 case _SC_2_FORT_RUN:
178 return (_POSIX2_FORT_RUN);
179 case _SC_2_LOCALEDEF:
180 return (_POSIX2_LOCALEDEF);
181 case _SC_2_SW_DEV:
182 return (_POSIX2_SW_DEV);
183 case _SC_2_UPE:
184 return (_POSIX2_UPE);
185 case _SC_TZNAME_MAX:
186 path = _PATH_ZONEINFO;
187 do_NAME_MAX:
188 sverrno = errno;
189 errno = 0;
190 lvalue = pathconf(path, _PC_NAME_MAX);
191 if (lvalue == -1 && errno != 0)
192 return (-1);
193 errno = sverrno;
194 return (lvalue);
195
196 case _SC_ASYNCHRONOUS_IO:
197 #if _POSIX_ASYNCHRONOUS_IO == 0
198 mib[0] = CTL_P1003_1B;
199 mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO;
200 break;
201 #else
202 return (_POSIX_ASYNCHRONOUS_IO);
203 #endif
204 case _SC_MAPPED_FILES:
205 return (_POSIX_MAPPED_FILES);
206 case _SC_MEMLOCK:
207 return (_POSIX_MEMLOCK);
208 case _SC_MEMLOCK_RANGE:
209 return (_POSIX_MEMLOCK_RANGE);
210 case _SC_MEMORY_PROTECTION:
211 return (_POSIX_MEMORY_PROTECTION);
212 case _SC_MESSAGE_PASSING:
213 #if _POSIX_MESSAGE_PASSING == 0
214 mib[0] = CTL_P1003_1B;
215 mib[1] = CTL_P1003_1B_MESSAGE_PASSING;
216 goto yesno;
217 #else
218 return (_POSIX_MESSAGE_PASSING);
219 #endif
220 case _SC_PRIORITIZED_IO:
221 #if _POSIX_PRIORITIZED_IO == 0
222 mib[0] = CTL_P1003_1B;
223 mib[1] = CTL_P1003_1B_PRIORITIZED_IO;
224 goto yesno;
225 #else
226 return (_POSIX_PRIORITIZED_IO);
227 #endif
228 case _SC_PRIORITY_SCHEDULING:
229 #if _POSIX_PRIORITY_SCHEDULING == 0
230 mib[0] = CTL_P1003_1B;
231 mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING;
232 goto yesno;
233 #else
234 return (_POSIX_PRIORITY_SCHEDULING);
235 #endif
236 case _SC_REALTIME_SIGNALS:
237 #if _POSIX_REALTIME_SIGNALS == 0
238 mib[0] = CTL_P1003_1B;
239 mib[1] = CTL_P1003_1B_REALTIME_SIGNALS;
240 goto yesno;
241 #else
242 return (_POSIX_REALTIME_SIGNALS);
243 #endif
244 case _SC_SEMAPHORES:
245 #if _POSIX_SEMAPHORES == 0
246 mib[0] = CTL_P1003_1B;
247 mib[1] = CTL_P1003_1B_SEMAPHORES;
248 goto yesno;
249 #else
250 return (_POSIX_SEMAPHORES);
251 #endif
252 case _SC_FSYNC:
253 return (_POSIX_FSYNC);
254
255 case _SC_SHARED_MEMORY_OBJECTS:
256 return (_POSIX_SHARED_MEMORY_OBJECTS);
257 case _SC_SYNCHRONIZED_IO:
258 #if _POSIX_SYNCHRONIZED_IO == 0
259 mib[0] = CTL_P1003_1B;
260 mib[1] = CTL_P1003_1B_SYNCHRONIZED_IO;
261 goto yesno;
262 #else
263 return (_POSIX_SYNCHRONIZED_IO);
264 #endif
265 case _SC_TIMERS:
266 #if _POSIX_TIMERS == 0
267 mib[0] = CTL_P1003_1B;
268 mib[1] = CTL_P1003_1B_TIMERS;
269 goto yesno;
270 #else
271 return (_POSIX_TIMERS);
272 #endif
273 case _SC_AIO_LISTIO_MAX:
274 mib[0] = CTL_P1003_1B;
275 mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX;
276 break;
277 case _SC_AIO_MAX:
278 mib[0] = CTL_P1003_1B;
279 mib[1] = CTL_P1003_1B_AIO_MAX;
280 break;
281 case _SC_AIO_PRIO_DELTA_MAX:
282 mib[0] = CTL_P1003_1B;
283 mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX;
284 break;
285 case _SC_DELAYTIMER_MAX:
286 mib[0] = CTL_P1003_1B;
287 mib[1] = CTL_P1003_1B_DELAYTIMER_MAX;
288 goto yesno;
289 case _SC_MQ_OPEN_MAX:
290 mib[0] = CTL_P1003_1B;
291 mib[1] = CTL_P1003_1B_MQ_OPEN_MAX;
292 goto yesno;
293 case _SC_PAGESIZE:
294 defaultresult = getpagesize();
295 mib[0] = CTL_P1003_1B;
296 mib[1] = CTL_P1003_1B_PAGESIZE;
297 goto yesno;
298 case _SC_RTSIG_MAX:
299 mib[0] = CTL_P1003_1B;
300 mib[1] = CTL_P1003_1B_RTSIG_MAX;
301 goto yesno;
302 case _SC_SEM_NSEMS_MAX:
303 return (-1);
304 case _SC_SEM_VALUE_MAX:
305 return (SEM_VALUE_MAX);
306 case _SC_SIGQUEUE_MAX:
307 mib[0] = CTL_P1003_1B;
308 mib[1] = CTL_P1003_1B_SIGQUEUE_MAX;
309 goto yesno;
310 case _SC_TIMER_MAX:
311 mib[0] = CTL_P1003_1B;
312 mib[1] = CTL_P1003_1B_TIMER_MAX;
313 yesno:
314 len = sizeof(value);
315 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
316 return (-1);
317 if (value == 0)
318 return (defaultresult);
319 return ((long)value);
320
321 case _SC_2_PBS:
322 case _SC_2_PBS_ACCOUNTING:
323 case _SC_2_PBS_CHECKPOINT:
324 case _SC_2_PBS_LOCATE:
325 case _SC_2_PBS_MESSAGE:
326 case _SC_2_PBS_TRACK:
327 #if _POSIX2_PBS == 0
328 #error "don't know how to determine _SC_2_PBS"
329 /*
330 * This probably requires digging through the filesystem
331 * to see if the appropriate package has been installed.
332 * Since we don't currently support this option at all,
333 * it's not worth the effort to write the code now.
334 * Figuring out which of the sub-options are supported
335 * would be even more difficult, so it's probably easier
336 * to always say ``no''.
337 */
338 #else
339 return (_POSIX2_PBS);
340 #endif
341 case _SC_ADVISORY_INFO:
342 #if _POSIX_ADVISORY_INFO == 0
343 #error "_POSIX_ADVISORY_INFO"
344 #else
345 return (_POSIX_ADVISORY_INFO);
346 #endif
347 case _SC_BARRIERS:
348 #if _POSIX_BARRIERS == 0
349 #error "_POSIX_BARRIERS"
350 #else
351 return (_POSIX_BARRIERS);
352 #endif
353 case _SC_CLOCK_SELECTION:
354 #if _POSIX_CLOCK_SELECTION == 0
355 #error "_POSIX_CLOCK_SELECTION"
356 #else
357 return (_POSIX_CLOCK_SELECTION);
358 #endif
359 case _SC_CPUTIME:
360 return (_POSIX_CPUTIME);
361 #ifdef notdef
362 case _SC_FILE_LOCKING:
363 /*
364 * XXX - The standard doesn't tell us how to define
365 * _POSIX_FILE_LOCKING, so we can't answer this one.
366 */
367 #endif
368
369 /*
370 * SUSv4tc1 says the following about _SC_GETGR_R_SIZE_MAX and
371 * _SC_GETPW_R_SIZE_MAX:
372 * Note that sysconf(_SC_GETGR_R_SIZE_MAX) may return -1 if
373 * there is no hard limit on the size of the buffer needed to
374 * store all the groups returned.
375 */
376 case _SC_GETGR_R_SIZE_MAX:
377 case _SC_GETPW_R_SIZE_MAX:
378 return (-1);
379 case _SC_HOST_NAME_MAX:
380 return (MAXHOSTNAMELEN - 1); /* does not include \0 */
381 case _SC_LOGIN_NAME_MAX:
382 return (MAXLOGNAME);
383 case _SC_MONOTONIC_CLOCK:
384 #if _POSIX_MONOTONIC_CLOCK == 0
385 #error "_POSIX_MONOTONIC_CLOCK"
386 #else
387 return (_POSIX_MONOTONIC_CLOCK);
388 #endif
389 #if _POSIX_MESSAGE_PASSING > -1
390 case _SC_MQ_PRIO_MAX:
391 return (MQ_PRIO_MAX);
392 #endif
393 case _SC_READER_WRITER_LOCKS:
394 return (_POSIX_READER_WRITER_LOCKS);
395 case _SC_REGEXP:
396 return (_POSIX_REGEXP);
397 case _SC_SHELL:
398 return (_POSIX_SHELL);
399 case _SC_SPAWN:
400 return (_POSIX_SPAWN);
401 case _SC_SPIN_LOCKS:
402 return (_POSIX_SPIN_LOCKS);
403 case _SC_SPORADIC_SERVER:
404 #if _POSIX_SPORADIC_SERVER == 0
405 #error "_POSIX_SPORADIC_SERVER"
406 #else
407 return (_POSIX_SPORADIC_SERVER);
408 #endif
409 case _SC_THREAD_ATTR_STACKADDR:
410 return (_POSIX_THREAD_ATTR_STACKADDR);
411 case _SC_THREAD_ATTR_STACKSIZE:
412 return (_POSIX_THREAD_ATTR_STACKSIZE);
413 case _SC_THREAD_CPUTIME:
414 return (_POSIX_THREAD_CPUTIME);
415 case _SC_THREAD_DESTRUCTOR_ITERATIONS:
416 return (PTHREAD_DESTRUCTOR_ITERATIONS);
417 case _SC_THREAD_KEYS_MAX:
418 return (PTHREAD_KEYS_MAX);
419 case _SC_THREAD_PRIO_INHERIT:
420 return (_POSIX_THREAD_PRIO_INHERIT);
421 case _SC_THREAD_PRIO_PROTECT:
422 return (_POSIX_THREAD_PRIO_PROTECT);
423 case _SC_THREAD_PRIORITY_SCHEDULING:
424 return (_POSIX_THREAD_PRIORITY_SCHEDULING);
425 case _SC_THREAD_PROCESS_SHARED:
426 return (_POSIX_THREAD_PROCESS_SHARED);
427 case _SC_THREAD_SAFE_FUNCTIONS:
428 return (_POSIX_THREAD_SAFE_FUNCTIONS);
429 case _SC_THREAD_STACK_MIN:
430 return (PTHREAD_STACK_MIN);
431 case _SC_THREAD_THREADS_MAX:
432 return (PTHREAD_THREADS_MAX); /* XXX wrong type! */
433 case _SC_TIMEOUTS:
434 return (_POSIX_TIMEOUTS);
435 case _SC_THREADS:
436 return (_POSIX_THREADS);
437 case _SC_TRACE:
438 #if _POSIX_TRACE == 0
439 #error "_POSIX_TRACE"
440 /* While you're implementing this, also do the ones below. */
441 #else
442 return (_POSIX_TRACE);
443 #endif
444 #if _POSIX_TRACE > -1
445 case _SC_TRACE_EVENT_FILTER:
446 return (_POSIX_TRACE_EVENT_FILTER);
447 case _SC_TRACE_INHERIT:
448 return (_POSIX_TRACE_INHERIT);
449 case _SC_TRACE_LOG:
450 return (_POSIX_TRACE_LOG);
451 #endif
452 case _SC_TTY_NAME_MAX:
453 path = _PATH_DEV;
454 goto do_NAME_MAX;
455 case _SC_TYPED_MEMORY_OBJECTS:
456 #if _POSIX_TYPED_MEMORY_OBJECTS == 0
457 #error "_POSIX_TYPED_MEMORY_OBJECTS"
458 #else
459 return (_POSIX_TYPED_MEMORY_OBJECTS);
460 #endif
461 case _SC_V6_ILP32_OFF32:
462 #if _V6_ILP32_OFF32 == 0
463 if (sizeof(int) * CHAR_BIT == 32 &&
464 sizeof(int) == sizeof(long) &&
465 sizeof(long) == sizeof(void *) &&
466 sizeof(void *) == sizeof(off_t))
467 return 1;
468 else
469 return -1;
470 #else
471 return (_V6_ILP32_OFF32);
472 #endif
473 case _SC_V6_ILP32_OFFBIG:
474 #if _V6_ILP32_OFFBIG == 0
475 if (sizeof(int) * CHAR_BIT == 32 &&
476 sizeof(int) == sizeof(long) &&
477 sizeof(long) == sizeof(void *) &&
478 sizeof(off_t) * CHAR_BIT >= 64)
479 return 1;
480 else
481 return -1;
482 #else
483 return (_V6_ILP32_OFFBIG);
484 #endif
485 case _SC_V6_LP64_OFF64:
486 #if _V6_LP64_OFF64 == 0
487 if (sizeof(int) * CHAR_BIT == 32 &&
488 sizeof(long) * CHAR_BIT == 64 &&
489 sizeof(long) == sizeof(void *) &&
490 sizeof(void *) == sizeof(off_t))
491 return 1;
492 else
493 return -1;
494 #else
495 return (_V6_LP64_OFF64);
496 #endif
497 case _SC_V6_LPBIG_OFFBIG:
498 #if _V6_LPBIG_OFFBIG == 0
499 if (sizeof(int) * CHAR_BIT >= 32 &&
500 sizeof(long) * CHAR_BIT >= 64 &&
501 sizeof(void *) * CHAR_BIT >= 64 &&
502 sizeof(off_t) * CHAR_BIT >= 64)
503 return 1;
504 else
505 return -1;
506 #else
507 return (_V6_LPBIG_OFFBIG);
508 #endif
509 case _SC_ATEXIT_MAX:
510 return (ATEXIT_SIZE);
511 case _SC_IOV_MAX:
512 mib[0] = CTL_KERN;
513 mib[1] = KERN_IOV_MAX;
514 break;
515 case _SC_XOPEN_CRYPT:
516 return (_XOPEN_CRYPT);
517 case _SC_XOPEN_ENH_I18N:
518 return (_XOPEN_ENH_I18N);
519 case _SC_XOPEN_LEGACY:
520 return (_XOPEN_LEGACY);
521 case _SC_XOPEN_REALTIME:
522 #if _XOPEN_REALTIME == 0
523 sverrno = errno;
524 value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 &&
525 sysconf(_SC_MEMLOCK) > 0 &&
526 sysconf(_SC_MEMLOCK_RANGE) > 0 &&
527 sysconf(_SC_MESSAGE_PASSING) > 0 &&
528 sysconf(_SC_PRIORITY_SCHEDULING) > 0 &&
529 sysconf(_SC_REALTIME_SIGNALS) > 0 &&
530 sysconf(_SC_SEMAPHORES) > 0 &&
531 sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 &&
532 sysconf(_SC_SYNCHRONIZED_IO) > 0 &&
533 sysconf(_SC_TIMERS) > 0;
534 errno = sverrno;
535 if (value)
536 return (200112L);
537 else
538 return (-1);
539 #else
540 return (_XOPEN_REALTIME);
541 #endif
542 case _SC_XOPEN_REALTIME_THREADS:
543 #if _XOPEN_REALTIME_THREADS == 0
544 #error "_XOPEN_REALTIME_THREADS"
545 #else
546 return (_XOPEN_REALTIME_THREADS);
547 #endif
548 case _SC_XOPEN_SHM:
549 len = sizeof(lvalue);
550 sverrno = errno;
551 if (sysctlbyname("kern.ipc.shmmin", &lvalue, &len, NULL,
552 0) == -1) {
553 errno = sverrno;
554 return (-1);
555 }
556 errno = sverrno;
557 return (1);
558 case _SC_XOPEN_STREAMS:
559 return (_XOPEN_STREAMS);
560 case _SC_XOPEN_UNIX:
561 return (_XOPEN_UNIX);
562 #ifdef _XOPEN_VERSION
563 case _SC_XOPEN_VERSION:
564 return (_XOPEN_VERSION);
565 #endif
566 #ifdef _XOPEN_XCU_VERSION
567 case _SC_XOPEN_XCU_VERSION:
568 return (_XOPEN_XCU_VERSION);
569 #endif
570 case _SC_SYMLOOP_MAX:
571 return (MAXSYMLINKS);
572 case _SC_RAW_SOCKETS:
573 return (_POSIX_RAW_SOCKETS);
574 case _SC_IPV6:
575 #if _POSIX_IPV6 == 0
576 sverrno = errno;
577 value = _socket(PF_INET6, SOCK_DGRAM, 0);
578 errno = sverrno;
579 if (value >= 0) {
580 _close(value);
581 return (200112L);
582 } else
583 return (0);
584 #else
585 return (_POSIX_IPV6);
586 #endif
587
588 case _SC_NPROCESSORS_CONF:
589 case _SC_NPROCESSORS_ONLN:
590 if (_elf_aux_info(AT_NCPUS, &value, sizeof(value)) == 0)
591 return ((long)value);
592 mib[0] = CTL_HW;
593 mib[1] = HW_NCPU;
594 break;
595
596 #ifdef _SC_PHYS_PAGES
597 case _SC_PHYS_PAGES:
598 len = sizeof(lvalue);
599 if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1)
600 return (-1);
601 return (lvalue);
602 #endif
603
604 #ifdef _SC_CPUSET_SIZE
605 case _SC_CPUSET_SIZE:
606 len = sizeof(value);
607 if (sysctlbyname("kern.sched.cpusetsize", &value, &len, NULL,
608 0) == -1)
609 return (-1);
610 return ((long)value);
611 #endif
612
613 default:
614 errno = EINVAL;
615 return (-1);
616 }
617 len = sizeof(value);
618 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
619 value = -1;
620 return ((long)value);
621 }
622