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 * 3. 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 * @(#)sysconf.c 8.2 (Berkeley) 3/20/94 33 * $FreeBSD: src/lib/libc/gen/sysconf.c,v 1.26 2008/02/27 05:56:57 wollman Exp $ 34 * $DragonFly: src/lib/libc/gen/sysconf.c,v 1.5 2008/02/21 12:47:54 hasso Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/time.h> 39 #include <sys/sysctl.h> 40 #include <sys/resource.h> 41 #include <sys/socket.h> 42 43 #include <errno.h> 44 #include <limits.h> 45 #include <paths.h> 46 #include <pthread.h> /* we just need the limits */ 47 #include <time.h> 48 #include <unistd.h> 49 50 #include "../stdlib/atexit.h" 51 #include "../stdtime/tzfile.h" 52 53 #define _PATH_ZONEINFO TZDIR /* from tzfile.h */ 54 55 /* 56 * sysconf -- 57 * get configurable system variables. 58 * 59 * XXX 60 * POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values 61 * not change during the lifetime of the calling process. This would seem 62 * to require that any change to system limits kill all running processes. 63 * A workaround might be to cache the values when they are first retrieved 64 * and then simply return the cached value on subsequent calls. This is 65 * less useful than returning up-to-date values, however. 66 */ 67 long 68 sysconf(int name) 69 { 70 struct rlimit rl; 71 size_t len; 72 int mib[2], sverrno, value; 73 long lvalue, defaultresult; 74 const char *path; 75 76 defaultresult = -1; 77 78 switch (name) { 79 case _SC_ARG_MAX: 80 mib[0] = CTL_KERN; 81 mib[1] = KERN_ARGMAX; 82 break; 83 case _SC_CHILD_MAX: 84 if (getrlimit(RLIMIT_NPROC, &rl) != 0) 85 return (-1); 86 if (rl.rlim_cur == RLIM_INFINITY) 87 return (-1); 88 if (rl.rlim_cur > LONG_MAX) { 89 errno = EOVERFLOW; 90 return (-1); 91 } 92 return ((long)rl.rlim_cur); 93 case _SC_CLK_TCK: 94 return (CLK_TCK); 95 case _SC_NGROUPS_MAX: 96 mib[0] = CTL_KERN; 97 mib[1] = KERN_NGROUPS; 98 break; 99 case _SC_OPEN_MAX: 100 if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 101 return (-1); 102 if (rl.rlim_cur == RLIM_INFINITY) 103 return (-1); 104 if (rl.rlim_cur > LONG_MAX) { 105 errno = EOVERFLOW; 106 return (-1); 107 } 108 return ((long)rl.rlim_cur); 109 case _SC_STREAM_MAX: 110 if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 111 return (-1); 112 if (rl.rlim_cur == RLIM_INFINITY) 113 return (-1); 114 if (rl.rlim_cur > LONG_MAX) { 115 errno = EOVERFLOW; 116 return (-1); 117 } 118 /* 119 * struct __sFILE currently has a limitation that 120 * file descriptors must fit in a signed short. 121 * This doesn't precisely capture the letter of POSIX 122 * but approximates the spirit. 123 */ 124 if (rl.rlim_cur > SHRT_MAX) 125 return (SHRT_MAX); 126 127 return ((long)rl.rlim_cur); 128 case _SC_JOB_CONTROL: 129 return (_POSIX_JOB_CONTROL); 130 case _SC_SAVED_IDS: 131 /* XXX - must be 1 */ 132 mib[0] = CTL_KERN; 133 mib[1] = KERN_SAVED_IDS; 134 goto yesno; 135 case _SC_VERSION: 136 mib[0] = CTL_KERN; 137 mib[1] = KERN_POSIX1; 138 break; 139 case _SC_BC_BASE_MAX: 140 return (BC_BASE_MAX); 141 case _SC_BC_DIM_MAX: 142 return (BC_DIM_MAX); 143 case _SC_BC_SCALE_MAX: 144 return (BC_SCALE_MAX); 145 case _SC_BC_STRING_MAX: 146 return (BC_STRING_MAX); 147 case _SC_COLL_WEIGHTS_MAX: 148 return (COLL_WEIGHTS_MAX); 149 case _SC_EXPR_NEST_MAX: 150 return (EXPR_NEST_MAX); 151 case _SC_LINE_MAX: 152 return (LINE_MAX); 153 case _SC_RE_DUP_MAX: 154 return (RE_DUP_MAX); 155 case _SC_2_VERSION: 156 /* 157 * This is something of a lie, but it would be silly at 158 * this point to try to deduce this from the contents 159 * of the filesystem. 160 */ 161 return (_POSIX2_VERSION); 162 case _SC_2_C_BIND: 163 return (_POSIX2_C_BIND); 164 case _SC_2_C_DEV: 165 return (_POSIX2_C_DEV); 166 case _SC_2_CHAR_TERM: 167 return (_POSIX2_CHAR_TERM); 168 case _SC_2_FORT_DEV: 169 return (_POSIX2_FORT_DEV); 170 case _SC_2_FORT_RUN: 171 return (_POSIX2_FORT_RUN); 172 case _SC_2_LOCALEDEF: 173 return (_POSIX2_LOCALEDEF); 174 case _SC_2_SW_DEV: 175 return (_POSIX2_SW_DEV); 176 case _SC_2_UPE: 177 return (_POSIX2_UPE); 178 case _SC_TZNAME_MAX: 179 path = _PATH_ZONEINFO; 180 do_NAME_MAX: 181 sverrno = errno; 182 errno = 0; 183 lvalue = pathconf(path, _PC_NAME_MAX); 184 if (lvalue == -1 && errno != 0) 185 return (-1); 186 errno = sverrno; 187 return (lvalue); 188 189 case _SC_ASYNCHRONOUS_IO: 190 #if _POSIX_ASYNCHRONOUS_IO == 0 191 mib[0] = CTL_P1003_1B; 192 mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO; 193 break; 194 #else 195 return (_POSIX_ASYNCHRONOUS_IO); 196 #endif 197 case _SC_MAPPED_FILES: 198 return (_POSIX_MAPPED_FILES); 199 case _SC_MEMLOCK: 200 return (_POSIX_MEMLOCK); 201 case _SC_MEMLOCK_RANGE: 202 return (_POSIX_MEMLOCK_RANGE); 203 case _SC_MEMORY_PROTECTION: 204 return (_POSIX_MEMORY_PROTECTION); 205 case _SC_MESSAGE_PASSING: 206 return (_POSIX_MESSAGE_PASSING); 207 case _SC_PRIORITIZED_IO: 208 #if _POSIX_PRIORITIZED_IO == 0 209 mib[0] = CTL_P1003_1B; 210 mib[1] = CTL_P1003_1B_PRIORITIZED_IO; 211 goto yesno; 212 #else 213 return (_POSIX_PRIORITIZED_IO); 214 #endif 215 case _SC_PRIORITY_SCHEDULING: 216 #if _POSIX_PRIORITY_SCHEDULING == 0 217 mib[0] = CTL_P1003_1B; 218 mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING; 219 goto yesno; 220 #else 221 return (_POSIX_PRIORITY_SCHEDULING); 222 #endif 223 case _SC_REALTIME_SIGNALS: 224 #if _POSIX_REALTIME_SIGNALS == 0 225 mib[0] = CTL_P1003_1B; 226 mib[1] = CTL_P1003_1B_REALTIME_SIGNALS; 227 goto yesno; 228 #else 229 return (_POSIX_REALTIME_SIGNALS); 230 #endif 231 case _SC_SEMAPHORES: 232 #if _POSIX_SEMAPHORES == 0 233 mib[0] = CTL_P1003_1B; 234 mib[1] = CTL_P1003_1B_SEMAPHORES; 235 goto yesno; 236 #else 237 return (_POSIX_SEMAPHORES); 238 #endif 239 case _SC_FSYNC: 240 return (_POSIX_FSYNC); 241 242 case _SC_SHARED_MEMORY_OBJECTS: 243 return (_POSIX_SHARED_MEMORY_OBJECTS); 244 case _SC_SYNCHRONIZED_IO: 245 #if _POSIX_SYNCHRONIZED_IO == 0 246 mib[0] = CTL_P1003_1B; 247 mib[1] = CTL_P1003_1B_SYNCHRONIZED_IO; 248 goto yesno; 249 #else 250 return (_POSIX_SYNCHRONIZED_IO); 251 #endif 252 case _SC_TIMERS: 253 #if _POSIX_TIMERS == 0 254 mib[0] = CTL_P1003_1B; 255 mib[1] = CTL_P1003_1B_TIMERS; 256 goto yesno; 257 #else 258 return (_POSIX_TIMERS); 259 #endif 260 case _SC_AIO_LISTIO_MAX: 261 mib[0] = CTL_P1003_1B; 262 mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX; 263 break; 264 case _SC_AIO_MAX: 265 mib[0] = CTL_P1003_1B; 266 mib[1] = CTL_P1003_1B_AIO_MAX; 267 break; 268 case _SC_AIO_PRIO_DELTA_MAX: 269 mib[0] = CTL_P1003_1B; 270 mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX; 271 break; 272 case _SC_DELAYTIMER_MAX: 273 mib[0] = CTL_P1003_1B; 274 mib[1] = CTL_P1003_1B_DELAYTIMER_MAX; 275 goto yesno; 276 case _SC_PAGESIZE: 277 defaultresult = getpagesize(); 278 mib[0] = CTL_P1003_1B; 279 mib[1] = CTL_P1003_1B_PAGESIZE; 280 goto yesno; 281 case _SC_RTSIG_MAX: 282 mib[0] = CTL_P1003_1B; 283 mib[1] = CTL_P1003_1B_RTSIG_MAX; 284 goto yesno; 285 case _SC_SEM_NSEMS_MAX: 286 mib[0] = CTL_P1003_1B; 287 mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX; 288 goto yesno; 289 case _SC_SEM_VALUE_MAX: 290 mib[0] = CTL_P1003_1B; 291 mib[1] = CTL_P1003_1B_SEM_VALUE_MAX; 292 goto yesno; 293 case _SC_SIGQUEUE_MAX: 294 mib[0] = CTL_P1003_1B; 295 mib[1] = CTL_P1003_1B_SIGQUEUE_MAX; 296 goto yesno; 297 case _SC_TIMER_MAX: 298 mib[0] = CTL_P1003_1B; 299 mib[1] = CTL_P1003_1B_TIMER_MAX; 300 yesno: 301 len = sizeof(value); 302 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 303 return (-1); 304 if (value == 0) 305 return (defaultresult); 306 return ((long)value); 307 308 case _SC_2_PBS: 309 case _SC_2_PBS_ACCOUNTING: 310 case _SC_2_PBS_CHECKPOINT: 311 case _SC_2_PBS_LOCATE: 312 case _SC_2_PBS_MESSAGE: 313 case _SC_2_PBS_TRACK: 314 #if _POSIX2_PBS == 0 315 #error "don't know how to determine _SC_2_PBS" 316 /* 317 * This probably requires digging through the filesystem 318 * to see if the appropriate package has been installed. 319 * Since we don't currently support this option at all, 320 * it's not worth the effort to write the code now. 321 * Figuring out which of the sub-options are supported 322 * would be even more difficult, so it's probably easier 323 * to always say ``no''. 324 */ 325 #else 326 return (_POSIX2_PBS); 327 #endif 328 case _SC_ADVISORY_INFO: 329 #if _POSIX_ADVISORY_INFO == 0 330 #error "_POSIX_ADVISORY_INFO" 331 #else 332 return (_POSIX_ADVISORY_INFO); 333 #endif 334 case _SC_BARRIERS: 335 #if _POSIX_BARRIERS == 0 336 #error "_POSIX_BARRIERS" 337 #else 338 return (_POSIX_BARRIERS); 339 #endif 340 case _SC_CLOCK_SELECTION: 341 #if _POSIX_CLOCK_SELECTION == 0 342 #error "_POSIX_CLOCK_SELECTION" 343 #else 344 return (_POSIX_CLOCK_SELECTION); 345 #endif 346 case _SC_CPUTIME: 347 #if _POSIX_CPUTIME == 0 348 #error "_POSIX_CPUTIME" 349 #else 350 return (_POSIX_CPUTIME); 351 #endif 352 #ifdef notdef 353 case _SC_FILE_LOCKING: 354 /* 355 * XXX - The standard doesn't tell us how to define 356 * _POSIX_FILE_LOCKING, so we can't answer this one. 357 */ 358 #endif 359 #if _POSIX_THREAD_SAFE_FUNCTIONS > -1 360 case _SC_GETGR_R_SIZE_MAX: 361 case _SC_GETPW_R_SIZE_MAX: 362 #error "somebody needs to implement this" 363 #endif 364 case _SC_HOST_NAME_MAX: 365 return (MAXHOSTNAMELEN - 1); /* does not include \0 */ 366 case _SC_LOGIN_NAME_MAX: 367 return (MAXLOGNAME); 368 case _SC_MONOTONIC_CLOCK: 369 #if _POSIX_MONOTONIC_CLOCK == 0 370 #error "_POSIX_MONOTONIC_CLOCK" 371 #else 372 return (_POSIX_MONOTONIC_CLOCK); 373 #endif 374 case _SC_MQ_OPEN_MAX: 375 len = sizeof(lvalue); 376 if (sysctlbyname("kern.mqueue.mq_open_max", &lvalue, &len, 377 NULL, 0) == -1) 378 return (-1); 379 return (lvalue); 380 381 case _SC_MQ_PRIO_MAX: 382 len = sizeof(lvalue); 383 if (sysctlbyname("kern.mqueue.mq_prio_max", &lvalue, &len, 384 NULL, 0) == -1) 385 return (-1); 386 return (lvalue); 387 388 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 mib[0] = CTL_HW; 586 mib[1] = HW_NCPU; 587 break; 588 589 #ifdef _SC_PHYS_PAGES 590 case _SC_PHYS_PAGES: 591 len = sizeof(lvalue); 592 if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1) 593 return (-1); 594 return (lvalue); 595 #endif 596 597 default: 598 errno = EINVAL; 599 return (-1); 600 } 601 len = sizeof(value); 602 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 603 value = -1; 604 return ((long)value); 605 } 606