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 <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 <time.h> 51 #include <unistd.h> 52 53 #include "../stdlib/atexit.h" 54 #include "tzfile.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 72 sysconf(name) 73 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 defaultresult = getpagesize(); 293 mib[0] = CTL_P1003_1B; 294 mib[1] = CTL_P1003_1B_PAGESIZE; 295 goto yesno; 296 case _SC_RTSIG_MAX: 297 mib[0] = CTL_P1003_1B; 298 mib[1] = CTL_P1003_1B_RTSIG_MAX; 299 goto yesno; 300 case _SC_SEM_NSEMS_MAX: 301 mib[0] = CTL_P1003_1B; 302 mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX; 303 goto yesno; 304 case _SC_SEM_VALUE_MAX: 305 mib[0] = CTL_P1003_1B; 306 mib[1] = CTL_P1003_1B_SEM_VALUE_MAX; 307 goto yesno; 308 case _SC_SIGQUEUE_MAX: 309 mib[0] = CTL_P1003_1B; 310 mib[1] = CTL_P1003_1B_SIGQUEUE_MAX; 311 goto yesno; 312 case _SC_TIMER_MAX: 313 mib[0] = CTL_P1003_1B; 314 mib[1] = CTL_P1003_1B_TIMER_MAX; 315 yesno: 316 len = sizeof(value); 317 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 318 return (-1); 319 if (value == 0) 320 return (defaultresult); 321 return ((long)value); 322 323 case _SC_2_PBS: 324 case _SC_2_PBS_ACCOUNTING: 325 case _SC_2_PBS_CHECKPOINT: 326 case _SC_2_PBS_LOCATE: 327 case _SC_2_PBS_MESSAGE: 328 case _SC_2_PBS_TRACK: 329 #if _POSIX2_PBS == 0 330 #error "don't know how to determine _SC_2_PBS" 331 /* 332 * This probably requires digging through the filesystem 333 * to see if the appropriate package has been installed. 334 * Since we don't currently support this option at all, 335 * it's not worth the effort to write the code now. 336 * Figuring out which of the sub-options are supported 337 * would be even more difficult, so it's probably easier 338 * to always say ``no''. 339 */ 340 #else 341 return (_POSIX2_PBS); 342 #endif 343 case _SC_ADVISORY_INFO: 344 #if _POSIX_ADVISORY_INFO == 0 345 #error "_POSIX_ADVISORY_INFO" 346 #else 347 return (_POSIX_ADVISORY_INFO); 348 #endif 349 case _SC_BARRIERS: 350 #if _POSIX_BARRIERS == 0 351 #error "_POSIX_BARRIERS" 352 #else 353 return (_POSIX_BARRIERS); 354 #endif 355 case _SC_CLOCK_SELECTION: 356 #if _POSIX_CLOCK_SELECTION == 0 357 #error "_POSIX_CLOCK_SELECTION" 358 #else 359 return (_POSIX_CLOCK_SELECTION); 360 #endif 361 case _SC_CPUTIME: 362 return (_POSIX_CPUTIME); 363 #ifdef notdef 364 case _SC_FILE_LOCKING: 365 /* 366 * XXX - The standard doesn't tell us how to define 367 * _POSIX_FILE_LOCKING, so we can't answer this one. 368 */ 369 #endif 370 #if _POSIX_THREAD_SAFE_FUNCTIONS > -1 371 case _SC_GETGR_R_SIZE_MAX: 372 case _SC_GETPW_R_SIZE_MAX: 373 #error "somebody needs to implement this" 374 #endif 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_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 608 609 default: 610 errno = EINVAL; 611 return (-1); 612 } 613 len = sizeof(value); 614 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 615 value = -1; 616 return ((long)value); 617 } 618