1/*- 2 * Copyright (c) 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Sean Eric Fagan of Cygnus Support. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#if defined(LIBC_SCCS) && !defined(lint) 34static char sccsid[] = "@(#)sysconf.c 8.2 (Berkeley) 3/20/94"; 35#endif /* LIBC_SCCS and not lint */ 36#include <sys/cdefs.h> 37__FBSDID("$FreeBSD: stable/10/lib/libc/gen/sysconf.c 317131 2017-04-19 10:57:57Z kib $"); 38 39#include <sys/param.h> 40#include <sys/time.h> 41#include <sys/sysctl.h> 42#include <sys/resource.h> 43#include <sys/socket.h> 44 45#include <elf.h> 46#include <errno.h> 47#include <limits.h> 48#include <paths.h> 49#include <pthread.h> /* we just need the limits */ 50#include <semaphore.h> 51#include <time.h> 52#include <unistd.h> 53 54#include "../stdlib/atexit.h" 55#include "tzfile.h" /* from ../../../contrib/tzcode/stdtime */ 56#include "libc_private.h" 57 58#define _PATH_ZONEINFO TZDIR /* from tzfile.h */ 59 60/* 61 * sysconf -- 62 * get configurable system variables. 63 * 64 * XXX 65 * POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values 66 * not change during the lifetime of the calling process. This would seem 67 * to require that any change to system limits kill all running processes. 68 * A workaround might be to cache the values when they are first retrieved 69 * and then simply return the cached value on subsequent calls. This is 70 * less useful than returning up-to-date values, however. 71 */ 72long 73sysconf(name) 74 int name; 75{ 76 struct rlimit rl; 77 size_t len; 78 int mib[2], sverrno, value; 79 long lvalue, defaultresult; 80 const char *path; 81 82 defaultresult = -1; 83 84 switch (name) { 85 case _SC_ARG_MAX: 86 mib[0] = CTL_KERN; 87 mib[1] = KERN_ARGMAX; 88 break; 89 case _SC_CHILD_MAX: 90 if (getrlimit(RLIMIT_NPROC, &rl) != 0) 91 return (-1); 92 if (rl.rlim_cur == RLIM_INFINITY) 93 return (-1); 94 if (rl.rlim_cur > LONG_MAX) { 95 errno = EOVERFLOW; 96 return (-1); 97 } 98 return ((long)rl.rlim_cur); 99 case _SC_CLK_TCK: 100 return (CLK_TCK); 101 case _SC_NGROUPS_MAX: 102 mib[0] = CTL_KERN; 103 mib[1] = KERN_NGROUPS; 104 break; 105 case _SC_OPEN_MAX: 106 if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 107 return (-1); 108 if (rl.rlim_cur == RLIM_INFINITY) 109 return (-1); 110 if (rl.rlim_cur > LONG_MAX) { 111 errno = EOVERFLOW; 112 return (-1); 113 } 114 return ((long)rl.rlim_cur); 115 case _SC_STREAM_MAX: 116 if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 117 return (-1); 118 if (rl.rlim_cur == RLIM_INFINITY) 119 return (-1); 120 if (rl.rlim_cur > LONG_MAX) { 121 errno = EOVERFLOW; 122 return (-1); 123 } 124 /* 125 * struct __sFILE currently has a limitation that 126 * file descriptors must fit in a signed short. 127 * This doesn't precisely capture the letter of POSIX 128 * but approximates the spirit. 129 */ 130 if (rl.rlim_cur > SHRT_MAX) 131 return (SHRT_MAX); 132 133 return ((long)rl.rlim_cur); 134 case _SC_JOB_CONTROL: 135 return (_POSIX_JOB_CONTROL); 136 case _SC_SAVED_IDS: 137 /* XXX - must be 1 */ 138 mib[0] = CTL_KERN; 139 mib[1] = KERN_SAVED_IDS; 140 goto yesno; 141 case _SC_VERSION: 142 mib[0] = CTL_KERN; 143 mib[1] = KERN_POSIX1; 144 break; 145 case _SC_BC_BASE_MAX: 146 return (BC_BASE_MAX); 147 case _SC_BC_DIM_MAX: 148 return (BC_DIM_MAX); 149 case _SC_BC_SCALE_MAX: 150 return (BC_SCALE_MAX); 151 case _SC_BC_STRING_MAX: 152 return (BC_STRING_MAX); 153 case _SC_COLL_WEIGHTS_MAX: 154 return (COLL_WEIGHTS_MAX); 155 case _SC_EXPR_NEST_MAX: 156 return (EXPR_NEST_MAX); 157 case _SC_LINE_MAX: 158 return (LINE_MAX); 159 case _SC_RE_DUP_MAX: 160 return (RE_DUP_MAX); 161 case _SC_2_VERSION: 162 /* 163 * This is something of a lie, but it would be silly at 164 * this point to try to deduce this from the contents 165 * of the filesystem. 166 */ 167 return (_POSIX2_VERSION); 168 case _SC_2_C_BIND: 169 return (_POSIX2_C_BIND); 170 case _SC_2_C_DEV: 171 return (_POSIX2_C_DEV); 172 case _SC_2_CHAR_TERM: 173 return (_POSIX2_CHAR_TERM); 174 case _SC_2_FORT_DEV: 175 return (_POSIX2_FORT_DEV); 176 case _SC_2_FORT_RUN: 177 return (_POSIX2_FORT_RUN); 178 case _SC_2_LOCALEDEF: 179 return (_POSIX2_LOCALEDEF); 180 case _SC_2_SW_DEV: 181 return (_POSIX2_SW_DEV); 182 case _SC_2_UPE: 183 return (_POSIX2_UPE); 184 case _SC_TZNAME_MAX: 185 path = _PATH_ZONEINFO; 186do_NAME_MAX: 187 sverrno = errno; 188 errno = 0; 189 lvalue = pathconf(path, _PC_NAME_MAX); 190 if (lvalue == -1 && errno != 0) 191 return (-1); 192 errno = sverrno; 193 return (lvalue); 194 195 case _SC_ASYNCHRONOUS_IO: 196#if _POSIX_ASYNCHRONOUS_IO == 0 197 mib[0] = CTL_P1003_1B; 198 mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO; 199 break; 200#else 201 return (_POSIX_ASYNCHRONOUS_IO); 202#endif 203 case _SC_MAPPED_FILES: 204 return (_POSIX_MAPPED_FILES); 205 case _SC_MEMLOCK: 206 return (_POSIX_MEMLOCK); 207 case _SC_MEMLOCK_RANGE: 208 return (_POSIX_MEMLOCK_RANGE); 209 case _SC_MEMORY_PROTECTION: 210 return (_POSIX_MEMORY_PROTECTION); 211 case _SC_MESSAGE_PASSING: 212#if _POSIX_MESSAGE_PASSING == 0 213 mib[0] = CTL_P1003_1B; 214 mib[1] = CTL_P1003_1B_MESSAGE_PASSING; 215 goto yesno; 216#else 217 return (_POSIX_MESSAGE_PASSING); 218#endif 219 case _SC_PRIORITIZED_IO: 220#if _POSIX_PRIORITIZED_IO == 0 221 mib[0] = CTL_P1003_1B; 222 mib[1] = CTL_P1003_1B_PRIORITIZED_IO; 223 goto yesno; 224#else 225 return (_POSIX_PRIORITIZED_IO); 226#endif 227 case _SC_PRIORITY_SCHEDULING: 228#if _POSIX_PRIORITY_SCHEDULING == 0 229 mib[0] = CTL_P1003_1B; 230 mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING; 231 goto yesno; 232#else 233 return (_POSIX_PRIORITY_SCHEDULING); 234#endif 235 case _SC_REALTIME_SIGNALS: 236#if _POSIX_REALTIME_SIGNALS == 0 237 mib[0] = CTL_P1003_1B; 238 mib[1] = CTL_P1003_1B_REALTIME_SIGNALS; 239 goto yesno; 240#else 241 return (_POSIX_REALTIME_SIGNALS); 242#endif 243 case _SC_SEMAPHORES: 244#if _POSIX_SEMAPHORES == 0 245 mib[0] = CTL_P1003_1B; 246 mib[1] = CTL_P1003_1B_SEMAPHORES; 247 goto yesno; 248#else 249 return (_POSIX_SEMAPHORES); 250#endif 251 case _SC_FSYNC: 252 return (_POSIX_FSYNC); 253 254 case _SC_SHARED_MEMORY_OBJECTS: 255 return (_POSIX_SHARED_MEMORY_OBJECTS); 256 case _SC_SYNCHRONIZED_IO: 257#if _POSIX_SYNCHRONIZED_IO == 0 258 mib[0] = CTL_P1003_1B; 259 mib[1] = CTL_P1003_1B_SYNCHRONIZED_IO; 260 goto yesno; 261#else 262 return (_POSIX_SYNCHRONIZED_IO); 263#endif 264 case _SC_TIMERS: 265#if _POSIX_TIMERS == 0 266 mib[0] = CTL_P1003_1B; 267 mib[1] = CTL_P1003_1B_TIMERS; 268 goto yesno; 269#else 270 return (_POSIX_TIMERS); 271#endif 272 case _SC_AIO_LISTIO_MAX: 273 mib[0] = CTL_P1003_1B; 274 mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX; 275 break; 276 case _SC_AIO_MAX: 277 mib[0] = CTL_P1003_1B; 278 mib[1] = CTL_P1003_1B_AIO_MAX; 279 break; 280 case _SC_AIO_PRIO_DELTA_MAX: 281 mib[0] = CTL_P1003_1B; 282 mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX; 283 break; 284 case _SC_DELAYTIMER_MAX: 285 mib[0] = CTL_P1003_1B; 286 mib[1] = CTL_P1003_1B_DELAYTIMER_MAX; 287 goto yesno; 288 case _SC_MQ_OPEN_MAX: 289 mib[0] = CTL_P1003_1B; 290 mib[1] = CTL_P1003_1B_MQ_OPEN_MAX; 291 goto yesno; 292 case _SC_PAGESIZE: 293 defaultresult = getpagesize(); 294 mib[0] = CTL_P1003_1B; 295 mib[1] = CTL_P1003_1B_PAGESIZE; 296 goto yesno; 297 case _SC_RTSIG_MAX: 298 mib[0] = CTL_P1003_1B; 299 mib[1] = CTL_P1003_1B_RTSIG_MAX; 300 goto yesno; 301 case _SC_SEM_NSEMS_MAX: 302 return (-1); 303 case _SC_SEM_VALUE_MAX: 304 return (SEM_VALUE_MAX); 305 case _SC_SIGQUEUE_MAX: 306 mib[0] = CTL_P1003_1B; 307 mib[1] = CTL_P1003_1B_SIGQUEUE_MAX; 308 goto yesno; 309 case _SC_TIMER_MAX: 310 mib[0] = CTL_P1003_1B; 311 mib[1] = CTL_P1003_1B_TIMER_MAX; 312yesno: 313 len = sizeof(value); 314 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 315 return (-1); 316 if (value == 0) 317 return (defaultresult); 318 return ((long)value); 319 320 case _SC_2_PBS: 321 case _SC_2_PBS_ACCOUNTING: 322 case _SC_2_PBS_CHECKPOINT: 323 case _SC_2_PBS_LOCATE: 324 case _SC_2_PBS_MESSAGE: 325 case _SC_2_PBS_TRACK: 326#if _POSIX2_PBS == 0 327#error "don't know how to determine _SC_2_PBS" 328 /* 329 * This probably requires digging through the filesystem 330 * to see if the appropriate package has been installed. 331 * Since we don't currently support this option at all, 332 * it's not worth the effort to write the code now. 333 * Figuring out which of the sub-options are supported 334 * would be even more difficult, so it's probably easier 335 * to always say ``no''. 336 */ 337#else 338 return (_POSIX2_PBS); 339#endif 340 case _SC_ADVISORY_INFO: 341#if _POSIX_ADVISORY_INFO == 0 342#error "_POSIX_ADVISORY_INFO" 343#else 344 return (_POSIX_ADVISORY_INFO); 345#endif 346 case _SC_BARRIERS: 347#if _POSIX_BARRIERS == 0 348#error "_POSIX_BARRIERS" 349#else 350 return (_POSIX_BARRIERS); 351#endif 352 case _SC_CLOCK_SELECTION: 353#if _POSIX_CLOCK_SELECTION == 0 354#error "_POSIX_CLOCK_SELECTION" 355#else 356 return (_POSIX_CLOCK_SELECTION); 357#endif 358 case _SC_CPUTIME: 359 return (_POSIX_CPUTIME); 360#ifdef notdef 361 case _SC_FILE_LOCKING: 362 /* 363 * XXX - The standard doesn't tell us how to define 364 * _POSIX_FILE_LOCKING, so we can't answer this one. 365 */ 366#endif 367 368 /* 369 * SUSv4tc1 says the following about _SC_GETGR_R_SIZE_MAX and 370 * _SC_GETPW_R_SIZE_MAX: 371 * Note that sysconf(_SC_GETGR_R_SIZE_MAX) may return -1 if 372 * there is no hard limit on the size of the buffer needed to 373 * store all the groups returned. 374 */ 375 case _SC_GETGR_R_SIZE_MAX: 376 case _SC_GETPW_R_SIZE_MAX: 377 return (-1); 378 case _SC_HOST_NAME_MAX: 379 return (MAXHOSTNAMELEN - 1); /* does not include \0 */ 380 case _SC_LOGIN_NAME_MAX: 381 return (MAXLOGNAME); 382 case _SC_MONOTONIC_CLOCK: 383#if _POSIX_MONOTONIC_CLOCK == 0 384#error "_POSIX_MONOTONIC_CLOCK" 385#else 386 return (_POSIX_MONOTONIC_CLOCK); 387#endif 388#if _POSIX_MESSAGE_PASSING > -1 389 case _SC_MQ_PRIO_MAX: 390 return (MQ_PRIO_MAX); 391#endif 392 case _SC_READER_WRITER_LOCKS: 393 return (_POSIX_READER_WRITER_LOCKS); 394 case _SC_REGEXP: 395 return (_POSIX_REGEXP); 396 case _SC_SHELL: 397 return (_POSIX_SHELL); 398 case _SC_SPAWN: 399 return (_POSIX_SPAWN); 400 case _SC_SPIN_LOCKS: 401 return (_POSIX_SPIN_LOCKS); 402 case _SC_SPORADIC_SERVER: 403#if _POSIX_SPORADIC_SERVER == 0 404#error "_POSIX_SPORADIC_SERVER" 405#else 406 return (_POSIX_SPORADIC_SERVER); 407#endif 408 case _SC_THREAD_ATTR_STACKADDR: 409 return (_POSIX_THREAD_ATTR_STACKADDR); 410 case _SC_THREAD_ATTR_STACKSIZE: 411 return (_POSIX_THREAD_ATTR_STACKSIZE); 412 case _SC_THREAD_CPUTIME: 413 return (_POSIX_THREAD_CPUTIME); 414 case _SC_THREAD_DESTRUCTOR_ITERATIONS: 415 return (PTHREAD_DESTRUCTOR_ITERATIONS); 416 case _SC_THREAD_KEYS_MAX: 417 return (PTHREAD_KEYS_MAX); 418 case _SC_THREAD_PRIO_INHERIT: 419 return (_POSIX_THREAD_PRIO_INHERIT); 420 case _SC_THREAD_PRIO_PROTECT: 421 return (_POSIX_THREAD_PRIO_PROTECT); 422 case _SC_THREAD_PRIORITY_SCHEDULING: 423 return (_POSIX_THREAD_PRIORITY_SCHEDULING); 424 case _SC_THREAD_PROCESS_SHARED: 425 return (_POSIX_THREAD_PROCESS_SHARED); 426 case _SC_THREAD_SAFE_FUNCTIONS: 427 return (_POSIX_THREAD_SAFE_FUNCTIONS); 428 case _SC_THREAD_STACK_MIN: 429 return (PTHREAD_STACK_MIN); 430 case _SC_THREAD_THREADS_MAX: 431 return (PTHREAD_THREADS_MAX); /* XXX wrong type! */ 432 case _SC_TIMEOUTS: 433 return (_POSIX_TIMEOUTS); 434 case _SC_THREADS: 435 return (_POSIX_THREADS); 436 case _SC_TRACE: 437#if _POSIX_TRACE == 0 438#error "_POSIX_TRACE" 439 /* While you're implementing this, also do the ones below. */ 440#else 441 return (_POSIX_TRACE); 442#endif 443#if _POSIX_TRACE > -1 444 case _SC_TRACE_EVENT_FILTER: 445 return (_POSIX_TRACE_EVENT_FILTER); 446 case _SC_TRACE_INHERIT: 447 return (_POSIX_TRACE_INHERIT); 448 case _SC_TRACE_LOG: 449 return (_POSIX_TRACE_LOG); 450#endif 451 case _SC_TTY_NAME_MAX: 452 path = _PATH_DEV; 453 goto do_NAME_MAX; 454 case _SC_TYPED_MEMORY_OBJECTS: 455#if _POSIX_TYPED_MEMORY_OBJECTS == 0 456#error "_POSIX_TYPED_MEMORY_OBJECTS" 457#else 458 return (_POSIX_TYPED_MEMORY_OBJECTS); 459#endif 460 case _SC_V6_ILP32_OFF32: 461#if _V6_ILP32_OFF32 == 0 462 if (sizeof(int) * CHAR_BIT == 32 && 463 sizeof(int) == sizeof(long) && 464 sizeof(long) == sizeof(void *) && 465 sizeof(void *) == sizeof(off_t)) 466 return 1; 467 else 468 return -1; 469#else 470 return (_V6_ILP32_OFF32); 471#endif 472 case _SC_V6_ILP32_OFFBIG: 473#if _V6_ILP32_OFFBIG == 0 474 if (sizeof(int) * CHAR_BIT == 32 && 475 sizeof(int) == sizeof(long) && 476 sizeof(long) == sizeof(void *) && 477 sizeof(off_t) * CHAR_BIT >= 64) 478 return 1; 479 else 480 return -1; 481#else 482 return (_V6_ILP32_OFFBIG); 483#endif 484 case _SC_V6_LP64_OFF64: 485#if _V6_LP64_OFF64 == 0 486 if (sizeof(int) * CHAR_BIT == 32 && 487 sizeof(long) * CHAR_BIT == 64 && 488 sizeof(long) == sizeof(void *) && 489 sizeof(void *) == sizeof(off_t)) 490 return 1; 491 else 492 return -1; 493#else 494 return (_V6_LP64_OFF64); 495#endif 496 case _SC_V6_LPBIG_OFFBIG: 497#if _V6_LPBIG_OFFBIG == 0 498 if (sizeof(int) * CHAR_BIT >= 32 && 499 sizeof(long) * CHAR_BIT >= 64 && 500 sizeof(void *) * CHAR_BIT >= 64 && 501 sizeof(off_t) * CHAR_BIT >= 64) 502 return 1; 503 else 504 return -1; 505#else 506 return (_V6_LPBIG_OFFBIG); 507#endif 508 case _SC_ATEXIT_MAX: 509 return (ATEXIT_SIZE); 510 case _SC_IOV_MAX: 511 mib[0] = CTL_KERN; 512 mib[1] = KERN_IOV_MAX; 513 break; 514 case _SC_XOPEN_CRYPT: 515 return (_XOPEN_CRYPT); 516 case _SC_XOPEN_ENH_I18N: 517 return (_XOPEN_ENH_I18N); 518 case _SC_XOPEN_LEGACY: 519 return (_XOPEN_LEGACY); 520 case _SC_XOPEN_REALTIME: 521#if _XOPEN_REALTIME == 0 522 sverrno = errno; 523 value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 && 524 sysconf(_SC_MEMLOCK) > 0 && 525 sysconf(_SC_MEMLOCK_RANGE) > 0 && 526 sysconf(_SC_MESSAGE_PASSING) > 0 && 527 sysconf(_SC_PRIORITY_SCHEDULING) > 0 && 528 sysconf(_SC_REALTIME_SIGNALS) > 0 && 529 sysconf(_SC_SEMAPHORES) > 0 && 530 sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 && 531 sysconf(_SC_SYNCHRONIZED_IO) > 0 && 532 sysconf(_SC_TIMERS) > 0; 533 errno = sverrno; 534 if (value) 535 return (200112L); 536 else 537 return (-1); 538#else 539 return (_XOPEN_REALTIME); 540#endif 541 case _SC_XOPEN_REALTIME_THREADS: 542#if _XOPEN_REALTIME_THREADS == 0 543#error "_XOPEN_REALTIME_THREADS" 544#else 545 return (_XOPEN_REALTIME_THREADS); 546#endif 547 case _SC_XOPEN_SHM: 548 len = sizeof(lvalue); 549 sverrno = errno; 550 if (sysctlbyname("kern.ipc.shmmin", &lvalue, &len, NULL, 551 0) == -1) { 552 errno = sverrno; 553 return (-1); 554 } 555 errno = sverrno; 556 return (1); 557 case _SC_XOPEN_STREAMS: 558 return (_XOPEN_STREAMS); 559 case _SC_XOPEN_UNIX: 560 return (_XOPEN_UNIX); 561#ifdef _XOPEN_VERSION 562 case _SC_XOPEN_VERSION: 563 return (_XOPEN_VERSION); 564#endif 565#ifdef _XOPEN_XCU_VERSION 566 case _SC_XOPEN_XCU_VERSION: 567 return (_XOPEN_XCU_VERSION); 568#endif 569 case _SC_SYMLOOP_MAX: 570 return (MAXSYMLINKS); 571 case _SC_RAW_SOCKETS: 572 return (_POSIX_RAW_SOCKETS); 573 case _SC_IPV6: 574#if _POSIX_IPV6 == 0 575 sverrno = errno; 576 value = socket(PF_INET6, SOCK_DGRAM, 0); 577 errno = sverrno; 578 if (value >= 0) { 579 close(value); 580 return (200112L); 581 } else 582 return (0); 583#else 584 return (_POSIX_IPV6); 585#endif 586 587 case _SC_NPROCESSORS_CONF: 588 case _SC_NPROCESSORS_ONLN: 589 if (_elf_aux_info(AT_NCPUS, &value, sizeof(value)) == 0) 590 return ((long)value); 591 mib[0] = CTL_HW; 592 mib[1] = HW_NCPU; 593 break; 594 595#ifdef _SC_PHYS_PAGES 596 case _SC_PHYS_PAGES: 597 len = sizeof(lvalue); 598 if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1) 599 return (-1); 600 return (lvalue); 601#endif 602 603#ifdef _SC_CPUSET_SIZE 604 case _SC_CPUSET_SIZE: 605 len = sizeof(value); 606 if (sysctlbyname("kern.sched.cpusetsize", &value, &len, NULL, 607 0) == -1) 608 return (-1); 609 return ((long)value); 610#endif 611 612 default: 613 errno = EINVAL; 614 return (-1); 615 } 616 len = sizeof(value); 617 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 618 value = -1; 619 return ((long)value); 620} 621