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) 34 static char sccsid[] = "@(#)sysconf.c 8.2 (Berkeley) 3/20/94"; 35 #endif /* LIBC_SCCS and not lint */ 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 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 <errno.h> 46 #include <limits.h> 47 #include <paths.h> 48 #include <pthread.h> /* we just need the limits */ 49 #include <time.h> 50 #include <unistd.h> 51 52 #include "../stdlib/atexit.h" 53 #include "tzfile.h" /* from ../../../contrib/tzcode/stdtime */ 54 55 #define _PATH_ZONEINFO TZDIR /* from tzfile.h */ 56 57 /* 58 * sysconf -- 59 * get configurable system variables. 60 * 61 * XXX 62 * POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values 63 * not change during the lifetime of the calling process. This would seem 64 * to require that any change to system limits kill all running processes. 65 * A workaround might be to cache the values when they are first retrieved 66 * and then simply return the cached value on subsequent calls. This is 67 * less useful than returning up-to-date values, however. 68 */ 69 long 70 sysconf(name) 71 int name; 72 { 73 struct rlimit rl; 74 size_t len; 75 int mib[2], sverrno, value; 76 long lvalue, defaultresult; 77 const char *path; 78 79 defaultresult = -1; 80 81 switch (name) { 82 case _SC_ARG_MAX: 83 mib[0] = CTL_KERN; 84 mib[1] = KERN_ARGMAX; 85 break; 86 case _SC_CHILD_MAX: 87 if (getrlimit(RLIMIT_NPROC, &rl) != 0) 88 return (-1); 89 if (rl.rlim_cur == RLIM_INFINITY) 90 return (-1); 91 if (rl.rlim_cur > LONG_MAX) { 92 errno = EOVERFLOW; 93 return (-1); 94 } 95 return ((long)rl.rlim_cur); 96 case _SC_CLK_TCK: 97 return (CLK_TCK); 98 case _SC_NGROUPS_MAX: 99 mib[0] = CTL_KERN; 100 mib[1] = KERN_NGROUPS; 101 break; 102 case _SC_OPEN_MAX: 103 if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 104 return (-1); 105 if (rl.rlim_cur == RLIM_INFINITY) 106 return (-1); 107 if (rl.rlim_cur > LONG_MAX) { 108 errno = EOVERFLOW; 109 return (-1); 110 } 111 return ((long)rl.rlim_cur); 112 case _SC_STREAM_MAX: 113 if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 114 return (-1); 115 if (rl.rlim_cur == RLIM_INFINITY) 116 return (-1); 117 if (rl.rlim_cur > LONG_MAX) { 118 errno = EOVERFLOW; 119 return (-1); 120 } 121 /* 122 * struct __sFILE currently has a limitation that 123 * file descriptors must fit in a signed short. 124 * This doesn't precisely capture the letter of POSIX 125 * but approximates the spirit. 126 */ 127 if (rl.rlim_cur > SHRT_MAX) 128 return (SHRT_MAX); 129 130 return ((long)rl.rlim_cur); 131 case _SC_JOB_CONTROL: 132 return (_POSIX_JOB_CONTROL); 133 case _SC_SAVED_IDS: 134 /* XXX - must be 1 */ 135 mib[0] = CTL_KERN; 136 mib[1] = KERN_SAVED_IDS; 137 goto yesno; 138 case _SC_VERSION: 139 mib[0] = CTL_KERN; 140 mib[1] = KERN_POSIX1; 141 break; 142 case _SC_BC_BASE_MAX: 143 return (BC_BASE_MAX); 144 case _SC_BC_DIM_MAX: 145 return (BC_DIM_MAX); 146 case _SC_BC_SCALE_MAX: 147 return (BC_SCALE_MAX); 148 case _SC_BC_STRING_MAX: 149 return (BC_STRING_MAX); 150 case _SC_COLL_WEIGHTS_MAX: 151 return (COLL_WEIGHTS_MAX); 152 case _SC_EXPR_NEST_MAX: 153 return (EXPR_NEST_MAX); 154 case _SC_LINE_MAX: 155 return (LINE_MAX); 156 case _SC_RE_DUP_MAX: 157 return (RE_DUP_MAX); 158 case _SC_2_VERSION: 159 /* 160 * This is something of a lie, but it would be silly at 161 * this point to try to deduce this from the contents 162 * of the filesystem. 163 */ 164 return (_POSIX2_VERSION); 165 case _SC_2_C_BIND: 166 return (_POSIX2_C_BIND); 167 case _SC_2_C_DEV: 168 return (_POSIX2_C_DEV); 169 case _SC_2_CHAR_TERM: 170 return (_POSIX2_CHAR_TERM); 171 case _SC_2_FORT_DEV: 172 return (_POSIX2_FORT_DEV); 173 case _SC_2_FORT_RUN: 174 return (_POSIX2_FORT_RUN); 175 case _SC_2_LOCALEDEF: 176 return (_POSIX2_LOCALEDEF); 177 case _SC_2_SW_DEV: 178 return (_POSIX2_SW_DEV); 179 case _SC_2_UPE: 180 return (_POSIX2_UPE); 181 case _SC_TZNAME_MAX: 182 path = _PATH_ZONEINFO; 183 do_NAME_MAX: 184 sverrno = errno; 185 errno = 0; 186 lvalue = pathconf(path, _PC_NAME_MAX); 187 if (lvalue == -1 && errno != 0) 188 return (-1); 189 errno = sverrno; 190 return (lvalue); 191 192 case _SC_ASYNCHRONOUS_IO: 193 #if _POSIX_ASYNCHRONOUS_IO == 0 194 mib[0] = CTL_P1003_1B; 195 mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO; 196 break; 197 #else 198 return (_POSIX_ASYNCHRONOUS_IO); 199 #endif 200 case _SC_MAPPED_FILES: 201 return (_POSIX_MAPPED_FILES); 202 case _SC_MEMLOCK: 203 return (_POSIX_MEMLOCK); 204 case _SC_MEMLOCK_RANGE: 205 return (_POSIX_MEMLOCK_RANGE); 206 case _SC_MEMORY_PROTECTION: 207 return (_POSIX_MEMORY_PROTECTION); 208 case _SC_MESSAGE_PASSING: 209 #if _POSIX_MESSAGE_PASSING == 0 210 mib[0] = CTL_P1003_1B; 211 mib[1] = CTL_P1003_1B_MESSAGE_PASSING; 212 goto yesno; 213 #else 214 return (_POSIX_MESSAGE_PASSING); 215 #endif 216 case _SC_PRIORITIZED_IO: 217 #if _POSIX_PRIORITIZED_IO == 0 218 mib[0] = CTL_P1003_1B; 219 mib[1] = CTL_P1003_1B_PRIORITIZED_IO; 220 goto yesno; 221 #else 222 return (_POSIX_PRIORITIZED_IO); 223 #endif 224 case _SC_PRIORITY_SCHEDULING: 225 #if _POSIX_PRIORITY_SCHEDULING == 0 226 mib[0] = CTL_P1003_1B; 227 mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING; 228 goto yesno; 229 #else 230 return (_POSIX_PRIORITY_SCHEDULING); 231 #endif 232 case _SC_REALTIME_SIGNALS: 233 #if _POSIX_REALTIME_SIGNALS == 0 234 mib[0] = CTL_P1003_1B; 235 mib[1] = CTL_P1003_1B_REALTIME_SIGNALS; 236 goto yesno; 237 #else 238 return (_POSIX_REALTIME_SIGNALS); 239 #endif 240 case _SC_SEMAPHORES: 241 #if _POSIX_SEMAPHORES == 0 242 mib[0] = CTL_P1003_1B; 243 mib[1] = CTL_P1003_1B_SEMAPHORES; 244 goto yesno; 245 #else 246 return (_POSIX_SEMAPHORES); 247 #endif 248 case _SC_FSYNC: 249 return (_POSIX_FSYNC); 250 251 case _SC_SHARED_MEMORY_OBJECTS: 252 return (_POSIX_SHARED_MEMORY_OBJECTS); 253 case _SC_SYNCHRONIZED_IO: 254 #if _POSIX_SYNCHRONIZED_IO == 0 255 mib[0] = CTL_P1003_1B; 256 mib[1] = CTL_P1003_1B_SYNCHRONIZED_IO; 257 goto yesno; 258 #else 259 return (_POSIX_SYNCHRONIZED_IO); 260 #endif 261 case _SC_TIMERS: 262 #if _POSIX_TIMERS == 0 263 mib[0] = CTL_P1003_1B; 264 mib[1] = CTL_P1003_1B_TIMERS; 265 goto yesno; 266 #else 267 return (_POSIX_TIMERS); 268 #endif 269 case _SC_AIO_LISTIO_MAX: 270 mib[0] = CTL_P1003_1B; 271 mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX; 272 break; 273 case _SC_AIO_MAX: 274 mib[0] = CTL_P1003_1B; 275 mib[1] = CTL_P1003_1B_AIO_MAX; 276 break; 277 case _SC_AIO_PRIO_DELTA_MAX: 278 mib[0] = CTL_P1003_1B; 279 mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX; 280 break; 281 case _SC_DELAYTIMER_MAX: 282 mib[0] = CTL_P1003_1B; 283 mib[1] = CTL_P1003_1B_DELAYTIMER_MAX; 284 goto yesno; 285 case _SC_MQ_OPEN_MAX: 286 mib[0] = CTL_P1003_1B; 287 mib[1] = CTL_P1003_1B_MQ_OPEN_MAX; 288 goto yesno; 289 case _SC_PAGESIZE: 290 defaultresult = getpagesize(); 291 mib[0] = CTL_P1003_1B; 292 mib[1] = CTL_P1003_1B_PAGESIZE; 293 goto yesno; 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 mib[0] = CTL_P1003_1B; 300 mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX; 301 goto yesno; 302 case _SC_SEM_VALUE_MAX: 303 mib[0] = CTL_P1003_1B; 304 mib[1] = CTL_P1003_1B_SEM_VALUE_MAX; 305 goto yesno; 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 #if _POSIX_CPUTIME == 0 361 #error "_POSIX_CPUTIME" 362 #else 363 return (_POSIX_CPUTIME); 364 #endif 365 #ifdef notdef 366 case _SC_FILE_LOCKING: 367 /* 368 * XXX - The standard doesn't tell us how to define 369 * _POSIX_FILE_LOCKING, so we can't answer this one. 370 */ 371 #endif 372 #if _POSIX_THREAD_SAFE_FUNCTIONS > -1 373 case _SC_GETGR_R_SIZE_MAX: 374 case _SC_GETPW_R_SIZE_MAX: 375 #error "somebody needs to implement this" 376 #endif 377 case _SC_HOST_NAME_MAX: 378 return (MAXHOSTNAMELEN - 1); /* does not include \0 */ 379 case _SC_LOGIN_NAME_MAX: 380 return (MAXLOGNAME); 381 case _SC_MONOTONIC_CLOCK: 382 #if _POSIX_MONOTONIC_CLOCK == 0 383 #error "_POSIX_MONOTONIC_CLOCK" 384 #else 385 return (_POSIX_MONOTONIC_CLOCK); 386 #endif 387 #if _POSIX_MESSAGE_PASSING > -1 388 case _SC_MQ_PRIO_MAX: 389 return (MQ_PRIO_MAX); 390 #endif 391 case _SC_READER_WRITER_LOCKS: 392 return (_POSIX_READER_WRITER_LOCKS); 393 case _SC_REGEXP: 394 return (_POSIX_REGEXP); 395 case _SC_SHELL: 396 return (_POSIX_SHELL); 397 case _SC_SPAWN: 398 return (_POSIX_SPAWN); 399 case _SC_SPIN_LOCKS: 400 return (_POSIX_SPIN_LOCKS); 401 case _SC_SPORADIC_SERVER: 402 #if _POSIX_SPORADIC_SERVER == 0 403 #error "_POSIX_SPORADIC_SERVER" 404 #else 405 return (_POSIX_SPORADIC_SERVER); 406 #endif 407 case _SC_THREAD_ATTR_STACKADDR: 408 return (_POSIX_THREAD_ATTR_STACKADDR); 409 case _SC_THREAD_ATTR_STACKSIZE: 410 return (_POSIX_THREAD_ATTR_STACKSIZE); 411 case _SC_THREAD_CPUTIME: 412 return (_POSIX_THREAD_CPUTIME); 413 case _SC_THREAD_DESTRUCTOR_ITERATIONS: 414 return (PTHREAD_DESTRUCTOR_ITERATIONS); 415 case _SC_THREAD_KEYS_MAX: 416 return (PTHREAD_KEYS_MAX); 417 case _SC_THREAD_PRIO_INHERIT: 418 return (_POSIX_THREAD_PRIO_INHERIT); 419 case _SC_THREAD_PRIO_PROTECT: 420 return (_POSIX_THREAD_PRIO_PROTECT); 421 case _SC_THREAD_PRIORITY_SCHEDULING: 422 return (_POSIX_THREAD_PRIORITY_SCHEDULING); 423 case _SC_THREAD_PROCESS_SHARED: 424 return (_POSIX_THREAD_PROCESS_SHARED); 425 case _SC_THREAD_SAFE_FUNCTIONS: 426 return (_POSIX_THREAD_SAFE_FUNCTIONS); 427 case _SC_THREAD_STACK_MIN: 428 return (PTHREAD_STACK_MIN); 429 case _SC_THREAD_THREADS_MAX: 430 return (PTHREAD_THREADS_MAX); /* XXX wrong type! */ 431 case _SC_TIMEOUTS: 432 return (_POSIX_TIMEOUTS); 433 case _SC_THREADS: 434 return (_POSIX_THREADS); 435 case _SC_TRACE: 436 #if _POSIX_TRACE == 0 437 #error "_POSIX_TRACE" 438 /* While you're implementing this, also do the ones below. */ 439 #else 440 return (_POSIX_TRACE); 441 #endif 442 #if _POSIX_TRACE > -1 443 case _SC_TRACE_EVENT_FILTER: 444 return (_POSIX_TRACE_EVENT_FILTER); 445 case _SC_TRACE_INHERIT: 446 return (_POSIX_TRACE_INHERIT); 447 case _SC_TRACE_LOG: 448 return (_POSIX_TRACE_LOG); 449 #endif 450 case _SC_TTY_NAME_MAX: 451 path = _PATH_DEV; 452 goto do_NAME_MAX; 453 case _SC_TYPED_MEMORY_OBJECTS: 454 #if _POSIX_TYPED_MEMORY_OBJECTS == 0 455 #error "_POSIX_TYPED_MEMORY_OBJECTS" 456 #else 457 return (_POSIX_TYPED_MEMORY_OBJECTS); 458 #endif 459 case _SC_V6_ILP32_OFF32: 460 #if _V6_ILP32_OFF32 == 0 461 if (sizeof(int) * CHAR_BIT == 32 && 462 sizeof(int) == sizeof(long) && 463 sizeof(long) == sizeof(void *) && 464 sizeof(void *) == sizeof(off_t)) 465 return 1; 466 else 467 return -1; 468 #else 469 return (_V6_ILP32_OFF32); 470 #endif 471 case _SC_V6_ILP32_OFFBIG: 472 #if _V6_ILP32_OFFBIG == 0 473 if (sizeof(int) * CHAR_BIT == 32 && 474 sizeof(int) == sizeof(long) && 475 sizeof(long) == sizeof(void *) && 476 sizeof(off_t) * CHAR_BIT >= 64) 477 return 1; 478 else 479 return -1; 480 #else 481 return (_V6_ILP32_OFFBIG); 482 #endif 483 case _SC_V6_LP64_OFF64: 484 #if _V6_LP64_OFF64 == 0 485 if (sizeof(int) * CHAR_BIT == 32 && 486 sizeof(long) * CHAR_BIT == 64 && 487 sizeof(long) == sizeof(void *) && 488 sizeof(void *) == sizeof(off_t)) 489 return 1; 490 else 491 return -1; 492 #else 493 return (_V6_LP64_OFF64); 494 #endif 495 case _SC_V6_LPBIG_OFFBIG: 496 #if _V6_LPBIG_OFFBIG == 0 497 if (sizeof(int) * CHAR_BIT >= 32 && 498 sizeof(long) * CHAR_BIT >= 64 && 499 sizeof(void *) * CHAR_BIT >= 64 && 500 sizeof(off_t) * CHAR_BIT >= 64) 501 return 1; 502 else 503 return -1; 504 #else 505 return (_V6_LPBIG_OFFBIG); 506 #endif 507 case _SC_ATEXIT_MAX: 508 return (ATEXIT_SIZE); 509 case _SC_IOV_MAX: 510 mib[0] = CTL_KERN; 511 mib[1] = KERN_IOV_MAX; 512 break; 513 case _SC_XOPEN_CRYPT: 514 return (_XOPEN_CRYPT); 515 case _SC_XOPEN_ENH_I18N: 516 return (_XOPEN_ENH_I18N); 517 case _SC_XOPEN_LEGACY: 518 return (_XOPEN_LEGACY); 519 case _SC_XOPEN_REALTIME: 520 #if _XOPEN_REALTIME == 0 521 sverrno = errno; 522 value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 && 523 sysconf(_SC_MEMLOCK) > 0 && 524 sysconf(_SC_MEMLOCK_RANGE) > 0 && 525 sysconf(_SC_MESSAGE_PASSING) > 0 && 526 sysconf(_SC_PRIORITY_SCHEDULING) > 0 && 527 sysconf(_SC_REALTIME_SIGNALS) > 0 && 528 sysconf(_SC_SEMAPHORES) > 0 && 529 sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 && 530 sysconf(_SC_SYNCHRONIZED_IO) > 0 && 531 sysconf(_SC_TIMERS) > 0; 532 errno = sverrno; 533 if (value) 534 return (200112L); 535 else 536 return (-1); 537 #else 538 return (_XOPEN_REALTIME); 539 #endif 540 case _SC_XOPEN_REALTIME_THREADS: 541 #if _XOPEN_REALTIME_THREADS == 0 542 #error "_XOPEN_REALTIME_THREADS" 543 #else 544 return (_XOPEN_REALTIME_THREADS); 545 #endif 546 case _SC_XOPEN_SHM: 547 len = sizeof(lvalue); 548 sverrno = errno; 549 if (sysctlbyname("kern.ipc.shmmin", &lvalue, &len, NULL, 550 0) == -1) { 551 errno = sverrno; 552 return (-1); 553 } 554 errno = sverrno; 555 return (1); 556 case _SC_XOPEN_STREAMS: 557 return (_XOPEN_STREAMS); 558 case _SC_XOPEN_UNIX: 559 return (_XOPEN_UNIX); 560 #ifdef _XOPEN_VERSION 561 case _SC_XOPEN_VERSION: 562 return (_XOPEN_VERSION); 563 #endif 564 #ifdef _XOPEN_XCU_VERSION 565 case _SC_XOPEN_XCU_VERSION: 566 return (_XOPEN_XCU_VERSION); 567 #endif 568 case _SC_SYMLOOP_MAX: 569 return (MAXSYMLINKS); 570 case _SC_RAW_SOCKETS: 571 return (_POSIX_RAW_SOCKETS); 572 case _SC_IPV6: 573 #if _POSIX_IPV6 == 0 574 sverrno = errno; 575 value = socket(PF_INET6, SOCK_DGRAM, 0); 576 errno = sverrno; 577 if (value >= 0) { 578 close(value); 579 return (200112L); 580 } else 581 return (0); 582 #else 583 return (_POSIX_IPV6); 584 #endif 585 586 case _SC_NPROCESSORS_CONF: 587 case _SC_NPROCESSORS_ONLN: 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 default: 601 errno = EINVAL; 602 return (-1); 603 } 604 len = sizeof(value); 605 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 606 value = -1; 607 return ((long)value); 608 } 609