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(int name) 73 { 74 struct rlimit rl; 75 size_t len; 76 int mib[2], sverrno, value; 77 long lvalue, defaultresult; 78 const char *path; 79 80 defaultresult = -1; 81 82 switch (name) { 83 case _SC_ARG_MAX: 84 mib[0] = CTL_KERN; 85 mib[1] = KERN_ARGMAX; 86 break; 87 case _SC_CHILD_MAX: 88 if (getrlimit(RLIMIT_NPROC, &rl) != 0) 89 return (-1); 90 if (rl.rlim_cur == RLIM_INFINITY) 91 return (-1); 92 if (rl.rlim_cur > LONG_MAX) { 93 errno = EOVERFLOW; 94 return (-1); 95 } 96 return ((long)rl.rlim_cur); 97 case _SC_CLK_TCK: 98 return (CLK_TCK); 99 case _SC_NGROUPS_MAX: 100 mib[0] = CTL_KERN; 101 mib[1] = KERN_NGROUPS; 102 break; 103 case _SC_OPEN_MAX: 104 if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 105 return (-1); 106 if (rl.rlim_cur == RLIM_INFINITY) 107 return (-1); 108 if (rl.rlim_cur > LONG_MAX) { 109 errno = EOVERFLOW; 110 return (-1); 111 } 112 return ((long)rl.rlim_cur); 113 case _SC_STREAM_MAX: 114 if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 115 return (-1); 116 if (rl.rlim_cur == RLIM_INFINITY) 117 return (-1); 118 if (rl.rlim_cur > LONG_MAX) { 119 errno = EOVERFLOW; 120 return (-1); 121 } 122 /* 123 * struct __sFILE currently has a limitation that 124 * file descriptors must fit in a signed short. 125 * This doesn't precisely capture the letter of POSIX 126 * but approximates the spirit. 127 */ 128 if (rl.rlim_cur > SHRT_MAX) 129 return (SHRT_MAX); 130 131 return ((long)rl.rlim_cur); 132 case _SC_JOB_CONTROL: 133 return (_POSIX_JOB_CONTROL); 134 case _SC_SAVED_IDS: 135 /* XXX - must be 1 */ 136 mib[0] = CTL_KERN; 137 mib[1] = KERN_SAVED_IDS; 138 goto yesno; 139 case _SC_VERSION: 140 mib[0] = CTL_KERN; 141 mib[1] = KERN_POSIX1; 142 break; 143 case _SC_BC_BASE_MAX: 144 return (BC_BASE_MAX); 145 case _SC_BC_DIM_MAX: 146 return (BC_DIM_MAX); 147 case _SC_BC_SCALE_MAX: 148 return (BC_SCALE_MAX); 149 case _SC_BC_STRING_MAX: 150 return (BC_STRING_MAX); 151 case _SC_COLL_WEIGHTS_MAX: 152 return (COLL_WEIGHTS_MAX); 153 case _SC_EXPR_NEST_MAX: 154 return (EXPR_NEST_MAX); 155 case _SC_LINE_MAX: 156 return (LINE_MAX); 157 case _SC_RE_DUP_MAX: 158 return (RE_DUP_MAX); 159 case _SC_2_VERSION: 160 /* 161 * This is something of a lie, but it would be silly at 162 * this point to try to deduce this from the contents 163 * of the filesystem. 164 */ 165 return (_POSIX2_VERSION); 166 case _SC_2_C_BIND: 167 return (_POSIX2_C_BIND); 168 case _SC_2_C_DEV: 169 return (_POSIX2_C_DEV); 170 case _SC_2_CHAR_TERM: 171 return (_POSIX2_CHAR_TERM); 172 case _SC_2_FORT_DEV: 173 return (_POSIX2_FORT_DEV); 174 case _SC_2_FORT_RUN: 175 return (_POSIX2_FORT_RUN); 176 case _SC_2_LOCALEDEF: 177 return (_POSIX2_LOCALEDEF); 178 case _SC_2_SW_DEV: 179 return (_POSIX2_SW_DEV); 180 case _SC_2_UPE: 181 return (_POSIX2_UPE); 182 case _SC_TZNAME_MAX: 183 path = _PATH_ZONEINFO; 184 do_NAME_MAX: 185 sverrno = errno; 186 errno = 0; 187 lvalue = pathconf(path, _PC_NAME_MAX); 188 if (lvalue == -1 && errno != 0) 189 return (-1); 190 errno = sverrno; 191 return (lvalue); 192 193 case _SC_ASYNCHRONOUS_IO: 194 #if _POSIX_ASYNCHRONOUS_IO == 0 195 mib[0] = CTL_P1003_1B; 196 mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO; 197 break; 198 #else 199 return (_POSIX_ASYNCHRONOUS_IO); 200 #endif 201 case _SC_MAPPED_FILES: 202 return (_POSIX_MAPPED_FILES); 203 case _SC_MEMLOCK: 204 return (_POSIX_MEMLOCK); 205 case _SC_MEMLOCK_RANGE: 206 return (_POSIX_MEMLOCK_RANGE); 207 case _SC_MEMORY_PROTECTION: 208 return (_POSIX_MEMORY_PROTECTION); 209 case _SC_MESSAGE_PASSING: 210 #if _POSIX_MESSAGE_PASSING == 0 211 mib[0] = CTL_P1003_1B; 212 mib[1] = CTL_P1003_1B_MESSAGE_PASSING; 213 goto yesno; 214 #else 215 return (_POSIX_MESSAGE_PASSING); 216 #endif 217 case _SC_PRIORITIZED_IO: 218 #if _POSIX_PRIORITIZED_IO == 0 219 mib[0] = CTL_P1003_1B; 220 mib[1] = CTL_P1003_1B_PRIORITIZED_IO; 221 goto yesno; 222 #else 223 return (_POSIX_PRIORITIZED_IO); 224 #endif 225 case _SC_PRIORITY_SCHEDULING: 226 #if _POSIX_PRIORITY_SCHEDULING == 0 227 mib[0] = CTL_P1003_1B; 228 mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING; 229 goto yesno; 230 #else 231 return (_POSIX_PRIORITY_SCHEDULING); 232 #endif 233 case _SC_REALTIME_SIGNALS: 234 #if _POSIX_REALTIME_SIGNALS == 0 235 mib[0] = CTL_P1003_1B; 236 mib[1] = CTL_P1003_1B_REALTIME_SIGNALS; 237 goto yesno; 238 #else 239 return (_POSIX_REALTIME_SIGNALS); 240 #endif 241 case _SC_SEMAPHORES: 242 #if _POSIX_SEMAPHORES == 0 243 mib[0] = CTL_P1003_1B; 244 mib[1] = CTL_P1003_1B_SEMAPHORES; 245 goto yesno; 246 #else 247 return (_POSIX_SEMAPHORES); 248 #endif 249 case _SC_FSYNC: 250 return (_POSIX_FSYNC); 251 252 case _SC_SHARED_MEMORY_OBJECTS: 253 return (_POSIX_SHARED_MEMORY_OBJECTS); 254 case _SC_SYNCHRONIZED_IO: 255 #if _POSIX_SYNCHRONIZED_IO == 0 256 mib[0] = CTL_P1003_1B; 257 mib[1] = CTL_P1003_1B_SYNCHRONIZED_IO; 258 goto yesno; 259 #else 260 return (_POSIX_SYNCHRONIZED_IO); 261 #endif 262 case _SC_TIMERS: 263 #if _POSIX_TIMERS == 0 264 mib[0] = CTL_P1003_1B; 265 mib[1] = CTL_P1003_1B_TIMERS; 266 goto yesno; 267 #else 268 return (_POSIX_TIMERS); 269 #endif 270 case _SC_AIO_LISTIO_MAX: 271 mib[0] = CTL_P1003_1B; 272 mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX; 273 break; 274 case _SC_AIO_MAX: 275 mib[0] = CTL_P1003_1B; 276 mib[1] = CTL_P1003_1B_AIO_MAX; 277 break; 278 case _SC_AIO_PRIO_DELTA_MAX: 279 mib[0] = CTL_P1003_1B; 280 mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX; 281 break; 282 case _SC_DELAYTIMER_MAX: 283 mib[0] = CTL_P1003_1B; 284 mib[1] = CTL_P1003_1B_DELAYTIMER_MAX; 285 goto yesno; 286 case _SC_MQ_OPEN_MAX: 287 mib[0] = CTL_P1003_1B; 288 mib[1] = CTL_P1003_1B_MQ_OPEN_MAX; 289 goto yesno; 290 case _SC_PAGESIZE: 291 defaultresult = getpagesize(); 292 mib[0] = CTL_P1003_1B; 293 mib[1] = CTL_P1003_1B_PAGESIZE; 294 goto yesno; 295 case _SC_RTSIG_MAX: 296 mib[0] = CTL_P1003_1B; 297 mib[1] = CTL_P1003_1B_RTSIG_MAX; 298 goto yesno; 299 case _SC_SEM_NSEMS_MAX: 300 mib[0] = CTL_P1003_1B; 301 mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX; 302 goto yesno; 303 case _SC_SEM_VALUE_MAX: 304 mib[0] = CTL_P1003_1B; 305 mib[1] = CTL_P1003_1B_SEM_VALUE_MAX; 306 goto yesno; 307 case _SC_SIGQUEUE_MAX: 308 mib[0] = CTL_P1003_1B; 309 mib[1] = CTL_P1003_1B_SIGQUEUE_MAX; 310 goto yesno; 311 case _SC_TIMER_MAX: 312 mib[0] = CTL_P1003_1B; 313 mib[1] = CTL_P1003_1B_TIMER_MAX; 314 yesno: 315 len = sizeof(value); 316 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 317 return (-1); 318 if (value == 0) 319 return (defaultresult); 320 return ((long)value); 321 322 case _SC_2_PBS: 323 case _SC_2_PBS_ACCOUNTING: 324 case _SC_2_PBS_CHECKPOINT: 325 case _SC_2_PBS_LOCATE: 326 case _SC_2_PBS_MESSAGE: 327 case _SC_2_PBS_TRACK: 328 #if _POSIX2_PBS == 0 329 #error "don't know how to determine _SC_2_PBS" 330 /* 331 * This probably requires digging through the filesystem 332 * to see if the appropriate package has been installed. 333 * Since we don't currently support this option at all, 334 * it's not worth the effort to write the code now. 335 * Figuring out which of the sub-options are supported 336 * would be even more difficult, so it's probably easier 337 * to always say ``no''. 338 */ 339 #else 340 return (_POSIX2_PBS); 341 #endif 342 case _SC_ADVISORY_INFO: 343 #if _POSIX_ADVISORY_INFO == 0 344 #error "_POSIX_ADVISORY_INFO" 345 #else 346 return (_POSIX_ADVISORY_INFO); 347 #endif 348 case _SC_BARRIERS: 349 #if _POSIX_BARRIERS == 0 350 #error "_POSIX_BARRIERS" 351 #else 352 return (_POSIX_BARRIERS); 353 #endif 354 case _SC_CLOCK_SELECTION: 355 #if _POSIX_CLOCK_SELECTION == 0 356 #error "_POSIX_CLOCK_SELECTION" 357 #else 358 return (_POSIX_CLOCK_SELECTION); 359 #endif 360 case _SC_CPUTIME: 361 return (_POSIX_CPUTIME); 362 #ifdef notdef 363 case _SC_FILE_LOCKING: 364 /* 365 * XXX - The standard doesn't tell us how to define 366 * _POSIX_FILE_LOCKING, so we can't answer this one. 367 */ 368 #endif 369 370 /* 371 * SUSv4tc1 says the following about _SC_GETGR_R_SIZE_MAX and 372 * _SC_GETPW_R_SIZE_MAX: 373 * Note that sysconf(_SC_GETGR_R_SIZE_MAX) may return -1 if 374 * there is no hard limit on the size of the buffer needed to 375 * store all the groups returned. 376 */ 377 case _SC_GETGR_R_SIZE_MAX: 378 case _SC_GETPW_R_SIZE_MAX: 379 return (-1); 380 case _SC_HOST_NAME_MAX: 381 return (MAXHOSTNAMELEN - 1); /* does not include \0 */ 382 case _SC_LOGIN_NAME_MAX: 383 return (MAXLOGNAME); 384 case _SC_MONOTONIC_CLOCK: 385 #if _POSIX_MONOTONIC_CLOCK == 0 386 #error "_POSIX_MONOTONIC_CLOCK" 387 #else 388 return (_POSIX_MONOTONIC_CLOCK); 389 #endif 390 #if _POSIX_MESSAGE_PASSING > -1 391 case _SC_MQ_PRIO_MAX: 392 return (MQ_PRIO_MAX); 393 #endif 394 case _SC_READER_WRITER_LOCKS: 395 return (_POSIX_READER_WRITER_LOCKS); 396 case _SC_REGEXP: 397 return (_POSIX_REGEXP); 398 case _SC_SHELL: 399 return (_POSIX_SHELL); 400 case _SC_SPAWN: 401 return (_POSIX_SPAWN); 402 case _SC_SPIN_LOCKS: 403 return (_POSIX_SPIN_LOCKS); 404 case _SC_SPORADIC_SERVER: 405 #if _POSIX_SPORADIC_SERVER == 0 406 #error "_POSIX_SPORADIC_SERVER" 407 #else 408 return (_POSIX_SPORADIC_SERVER); 409 #endif 410 case _SC_THREAD_ATTR_STACKADDR: 411 return (_POSIX_THREAD_ATTR_STACKADDR); 412 case _SC_THREAD_ATTR_STACKSIZE: 413 return (_POSIX_THREAD_ATTR_STACKSIZE); 414 case _SC_THREAD_CPUTIME: 415 return (_POSIX_THREAD_CPUTIME); 416 case _SC_THREAD_DESTRUCTOR_ITERATIONS: 417 return (PTHREAD_DESTRUCTOR_ITERATIONS); 418 case _SC_THREAD_KEYS_MAX: 419 return (PTHREAD_KEYS_MAX); 420 case _SC_THREAD_PRIO_INHERIT: 421 return (_POSIX_THREAD_PRIO_INHERIT); 422 case _SC_THREAD_PRIO_PROTECT: 423 return (_POSIX_THREAD_PRIO_PROTECT); 424 case _SC_THREAD_PRIORITY_SCHEDULING: 425 return (_POSIX_THREAD_PRIORITY_SCHEDULING); 426 case _SC_THREAD_PROCESS_SHARED: 427 return (_POSIX_THREAD_PROCESS_SHARED); 428 case _SC_THREAD_SAFE_FUNCTIONS: 429 return (_POSIX_THREAD_SAFE_FUNCTIONS); 430 case _SC_THREAD_STACK_MIN: 431 return (PTHREAD_STACK_MIN); 432 case _SC_THREAD_THREADS_MAX: 433 return (PTHREAD_THREADS_MAX); /* XXX wrong type! */ 434 case _SC_TIMEOUTS: 435 return (_POSIX_TIMEOUTS); 436 case _SC_THREADS: 437 return (_POSIX_THREADS); 438 case _SC_TRACE: 439 #if _POSIX_TRACE == 0 440 #error "_POSIX_TRACE" 441 /* While you're implementing this, also do the ones below. */ 442 #else 443 return (_POSIX_TRACE); 444 #endif 445 #if _POSIX_TRACE > -1 446 case _SC_TRACE_EVENT_FILTER: 447 return (_POSIX_TRACE_EVENT_FILTER); 448 case _SC_TRACE_INHERIT: 449 return (_POSIX_TRACE_INHERIT); 450 case _SC_TRACE_LOG: 451 return (_POSIX_TRACE_LOG); 452 #endif 453 case _SC_TTY_NAME_MAX: 454 path = _PATH_DEV; 455 goto do_NAME_MAX; 456 case _SC_TYPED_MEMORY_OBJECTS: 457 #if _POSIX_TYPED_MEMORY_OBJECTS == 0 458 #error "_POSIX_TYPED_MEMORY_OBJECTS" 459 #else 460 return (_POSIX_TYPED_MEMORY_OBJECTS); 461 #endif 462 case _SC_V6_ILP32_OFF32: 463 #if _V6_ILP32_OFF32 == 0 464 if (sizeof(int) * CHAR_BIT == 32 && 465 sizeof(int) == sizeof(long) && 466 sizeof(long) == sizeof(void *) && 467 sizeof(void *) == sizeof(off_t)) 468 return 1; 469 else 470 return -1; 471 #else 472 return (_V6_ILP32_OFF32); 473 #endif 474 case _SC_V6_ILP32_OFFBIG: 475 #if _V6_ILP32_OFFBIG == 0 476 if (sizeof(int) * CHAR_BIT == 32 && 477 sizeof(int) == sizeof(long) && 478 sizeof(long) == sizeof(void *) && 479 sizeof(off_t) * CHAR_BIT >= 64) 480 return 1; 481 else 482 return -1; 483 #else 484 return (_V6_ILP32_OFFBIG); 485 #endif 486 case _SC_V6_LP64_OFF64: 487 #if _V6_LP64_OFF64 == 0 488 if (sizeof(int) * CHAR_BIT == 32 && 489 sizeof(long) * CHAR_BIT == 64 && 490 sizeof(long) == sizeof(void *) && 491 sizeof(void *) == sizeof(off_t)) 492 return 1; 493 else 494 return -1; 495 #else 496 return (_V6_LP64_OFF64); 497 #endif 498 case _SC_V6_LPBIG_OFFBIG: 499 #if _V6_LPBIG_OFFBIG == 0 500 if (sizeof(int) * CHAR_BIT >= 32 && 501 sizeof(long) * CHAR_BIT >= 64 && 502 sizeof(void *) * CHAR_BIT >= 64 && 503 sizeof(off_t) * CHAR_BIT >= 64) 504 return 1; 505 else 506 return -1; 507 #else 508 return (_V6_LPBIG_OFFBIG); 509 #endif 510 case _SC_ATEXIT_MAX: 511 return (ATEXIT_SIZE); 512 case _SC_IOV_MAX: 513 mib[0] = CTL_KERN; 514 mib[1] = KERN_IOV_MAX; 515 break; 516 case _SC_XOPEN_CRYPT: 517 return (_XOPEN_CRYPT); 518 case _SC_XOPEN_ENH_I18N: 519 return (_XOPEN_ENH_I18N); 520 case _SC_XOPEN_LEGACY: 521 return (_XOPEN_LEGACY); 522 case _SC_XOPEN_REALTIME: 523 #if _XOPEN_REALTIME == 0 524 sverrno = errno; 525 value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 && 526 sysconf(_SC_MEMLOCK) > 0 && 527 sysconf(_SC_MEMLOCK_RANGE) > 0 && 528 sysconf(_SC_MESSAGE_PASSING) > 0 && 529 sysconf(_SC_PRIORITY_SCHEDULING) > 0 && 530 sysconf(_SC_REALTIME_SIGNALS) > 0 && 531 sysconf(_SC_SEMAPHORES) > 0 && 532 sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 && 533 sysconf(_SC_SYNCHRONIZED_IO) > 0 && 534 sysconf(_SC_TIMERS) > 0; 535 errno = sverrno; 536 if (value) 537 return (200112L); 538 else 539 return (-1); 540 #else 541 return (_XOPEN_REALTIME); 542 #endif 543 case _SC_XOPEN_REALTIME_THREADS: 544 #if _XOPEN_REALTIME_THREADS == 0 545 #error "_XOPEN_REALTIME_THREADS" 546 #else 547 return (_XOPEN_REALTIME_THREADS); 548 #endif 549 case _SC_XOPEN_SHM: 550 len = sizeof(lvalue); 551 sverrno = errno; 552 if (sysctlbyname("kern.ipc.shmmin", &lvalue, &len, NULL, 553 0) == -1) { 554 errno = sverrno; 555 return (-1); 556 } 557 errno = sverrno; 558 return (1); 559 case _SC_XOPEN_STREAMS: 560 return (_XOPEN_STREAMS); 561 case _SC_XOPEN_UNIX: 562 return (_XOPEN_UNIX); 563 #ifdef _XOPEN_VERSION 564 case _SC_XOPEN_VERSION: 565 return (_XOPEN_VERSION); 566 #endif 567 #ifdef _XOPEN_XCU_VERSION 568 case _SC_XOPEN_XCU_VERSION: 569 return (_XOPEN_XCU_VERSION); 570 #endif 571 case _SC_SYMLOOP_MAX: 572 return (MAXSYMLINKS); 573 case _SC_RAW_SOCKETS: 574 return (_POSIX_RAW_SOCKETS); 575 case _SC_IPV6: 576 #if _POSIX_IPV6 == 0 577 sverrno = errno; 578 value = socket(PF_INET6, SOCK_DGRAM, 0); 579 errno = sverrno; 580 if (value >= 0) { 581 close(value); 582 return (200112L); 583 } else 584 return (0); 585 #else 586 return (_POSIX_IPV6); 587 #endif 588 589 case _SC_NPROCESSORS_CONF: 590 case _SC_NPROCESSORS_ONLN: 591 if (_elf_aux_info(AT_NCPUS, &value, sizeof(value)) == 0) 592 return ((long)value); 593 mib[0] = CTL_HW; 594 mib[1] = HW_NCPU; 595 break; 596 597 #ifdef _SC_PHYS_PAGES 598 case _SC_PHYS_PAGES: 599 len = sizeof(lvalue); 600 if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1) 601 return (-1); 602 return (lvalue); 603 #endif 604 605 #ifdef _SC_CPUSET_SIZE 606 case _SC_CPUSET_SIZE: 607 len = sizeof(value); 608 if (sysctlbyname("kern.sched.cpusetsize", &value, &len, NULL, 609 0) == -1) 610 return (-1); 611 return ((long)value); 612 #endif 613 614 default: 615 errno = EINVAL; 616 return (-1); 617 } 618 len = sizeof(value); 619 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 620 value = -1; 621 return ((long)value); 622 } 623