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