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