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 "namespace.h" 36 #include <sys/param.h> 37 #include <sys/exterrvar.h> 38 #include <sys/time.h> 39 #include <sys/sysctl.h> 40 #include <sys/resource.h> 41 #include <sys/socket.h> 42 43 #include <elf.h> 44 #include <errno.h> 45 #include <limits.h> 46 #include <paths.h> 47 #include <pthread.h> /* we just need the limits */ 48 #include <semaphore.h> 49 #include <time.h> 50 #include <unistd.h> 51 #include "un-namespace.h" 52 53 #include "../stdlib/atexit.h" 54 #include "tzdir.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 return (getpagesize()); 292 case _SC_RTSIG_MAX: 293 mib[0] = CTL_P1003_1B; 294 mib[1] = CTL_P1003_1B_RTSIG_MAX; 295 goto yesno; 296 case _SC_SEM_NSEMS_MAX: 297 return (-1); 298 case _SC_SEM_VALUE_MAX: 299 return (SEM_VALUE_MAX); 300 case _SC_SIGQUEUE_MAX: 301 mib[0] = CTL_P1003_1B; 302 mib[1] = CTL_P1003_1B_SIGQUEUE_MAX; 303 goto yesno; 304 case _SC_TIMER_MAX: 305 mib[0] = CTL_P1003_1B; 306 mib[1] = CTL_P1003_1B_TIMER_MAX; 307 yesno: 308 len = sizeof(value); 309 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 310 return (-1); 311 if (value == 0) 312 return (defaultresult); 313 return ((long)value); 314 315 case _SC_2_PBS: 316 case _SC_2_PBS_ACCOUNTING: 317 case _SC_2_PBS_CHECKPOINT: 318 case _SC_2_PBS_LOCATE: 319 case _SC_2_PBS_MESSAGE: 320 case _SC_2_PBS_TRACK: 321 #if _POSIX2_PBS == 0 322 #error "don't know how to determine _SC_2_PBS" 323 /* 324 * This probably requires digging through the filesystem 325 * to see if the appropriate package has been installed. 326 * Since we don't currently support this option at all, 327 * it's not worth the effort to write the code now. 328 * Figuring out which of the sub-options are supported 329 * would be even more difficult, so it's probably easier 330 * to always say ``no''. 331 */ 332 #else 333 return (_POSIX2_PBS); 334 #endif 335 case _SC_ADVISORY_INFO: 336 #if _POSIX_ADVISORY_INFO == 0 337 #error "_POSIX_ADVISORY_INFO" 338 #else 339 return (_POSIX_ADVISORY_INFO); 340 #endif 341 case _SC_BARRIERS: 342 #if _POSIX_BARRIERS == 0 343 #error "_POSIX_BARRIERS" 344 #else 345 return (_POSIX_BARRIERS); 346 #endif 347 case _SC_CLOCK_SELECTION: 348 #if _POSIX_CLOCK_SELECTION == 0 349 #error "_POSIX_CLOCK_SELECTION" 350 #else 351 return (_POSIX_CLOCK_SELECTION); 352 #endif 353 case _SC_CPUTIME: 354 return (_POSIX_CPUTIME); 355 #ifdef notdef 356 case _SC_FILE_LOCKING: 357 /* 358 * XXX - The standard doesn't tell us how to define 359 * _POSIX_FILE_LOCKING, so we can't answer this one. 360 */ 361 #endif 362 363 /* 364 * SUSv4tc1 says the following about _SC_GETGR_R_SIZE_MAX and 365 * _SC_GETPW_R_SIZE_MAX: 366 * Note that sysconf(_SC_GETGR_R_SIZE_MAX) may return -1 if 367 * there is no hard limit on the size of the buffer needed to 368 * store all the groups returned. 369 */ 370 case _SC_GETGR_R_SIZE_MAX: 371 case _SC_GETPW_R_SIZE_MAX: 372 return (-1); 373 case _SC_HOST_NAME_MAX: 374 return (MAXHOSTNAMELEN - 1); /* does not include \0 */ 375 case _SC_LOGIN_NAME_MAX: 376 return (MAXLOGNAME); 377 case _SC_MONOTONIC_CLOCK: 378 #if _POSIX_MONOTONIC_CLOCK == 0 379 #error "_POSIX_MONOTONIC_CLOCK" 380 #else 381 return (_POSIX_MONOTONIC_CLOCK); 382 #endif 383 #if _POSIX_MESSAGE_PASSING > -1 384 case _SC_MQ_PRIO_MAX: 385 return (MQ_PRIO_MAX); 386 #endif 387 case _SC_READER_WRITER_LOCKS: 388 return (_POSIX_READER_WRITER_LOCKS); 389 case _SC_REGEXP: 390 return (_POSIX_REGEXP); 391 case _SC_SHELL: 392 return (_POSIX_SHELL); 393 case _SC_SPAWN: 394 return (_POSIX_SPAWN); 395 case _SC_SPIN_LOCKS: 396 return (_POSIX_SPIN_LOCKS); 397 case _SC_SPORADIC_SERVER: 398 #if _POSIX_SPORADIC_SERVER == 0 399 #error "_POSIX_SPORADIC_SERVER" 400 #else 401 return (_POSIX_SPORADIC_SERVER); 402 #endif 403 case _SC_THREAD_ATTR_STACKADDR: 404 return (_POSIX_THREAD_ATTR_STACKADDR); 405 case _SC_THREAD_ATTR_STACKSIZE: 406 return (_POSIX_THREAD_ATTR_STACKSIZE); 407 case _SC_THREAD_CPUTIME: 408 return (_POSIX_THREAD_CPUTIME); 409 case _SC_THREAD_DESTRUCTOR_ITERATIONS: 410 return (PTHREAD_DESTRUCTOR_ITERATIONS); 411 case _SC_THREAD_KEYS_MAX: 412 return (PTHREAD_KEYS_MAX); 413 case _SC_THREAD_PRIO_INHERIT: 414 return (_POSIX_THREAD_PRIO_INHERIT); 415 case _SC_THREAD_PRIO_PROTECT: 416 return (_POSIX_THREAD_PRIO_PROTECT); 417 case _SC_THREAD_PRIORITY_SCHEDULING: 418 return (_POSIX_THREAD_PRIORITY_SCHEDULING); 419 case _SC_THREAD_PROCESS_SHARED: 420 return (_POSIX_THREAD_PROCESS_SHARED); 421 case _SC_THREAD_SAFE_FUNCTIONS: 422 return (_POSIX_THREAD_SAFE_FUNCTIONS); 423 case _SC_THREAD_STACK_MIN: 424 return (PTHREAD_STACK_MIN); 425 case _SC_THREAD_THREADS_MAX: 426 return (PTHREAD_THREADS_MAX); /* XXX wrong type! */ 427 case _SC_TIMEOUTS: 428 return (_POSIX_TIMEOUTS); 429 case _SC_THREADS: 430 return (_POSIX_THREADS); 431 case _SC_TRACE: 432 #if _POSIX_TRACE == 0 433 #error "_POSIX_TRACE" 434 /* While you're implementing this, also do the ones below. */ 435 #else 436 return (_POSIX_TRACE); 437 #endif 438 #if _POSIX_TRACE > -1 439 case _SC_TRACE_EVENT_FILTER: 440 return (_POSIX_TRACE_EVENT_FILTER); 441 case _SC_TRACE_INHERIT: 442 return (_POSIX_TRACE_INHERIT); 443 case _SC_TRACE_LOG: 444 return (_POSIX_TRACE_LOG); 445 #endif 446 case _SC_TTY_NAME_MAX: 447 path = _PATH_DEV; 448 goto do_NAME_MAX; 449 case _SC_TYPED_MEMORY_OBJECTS: 450 #if _POSIX_TYPED_MEMORY_OBJECTS == 0 451 #error "_POSIX_TYPED_MEMORY_OBJECTS" 452 #else 453 return (_POSIX_TYPED_MEMORY_OBJECTS); 454 #endif 455 case _SC_V6_ILP32_OFF32: 456 #if _V6_ILP32_OFF32 == 0 457 if (sizeof(int) * CHAR_BIT == 32 && 458 sizeof(int) == sizeof(long) && 459 sizeof(long) == sizeof(void *) && 460 sizeof(void *) == sizeof(off_t)) 461 return 1; 462 else 463 return -1; 464 #else 465 return (_V6_ILP32_OFF32); 466 #endif 467 case _SC_V6_ILP32_OFFBIG: 468 #if _V6_ILP32_OFFBIG == 0 469 if (sizeof(int) * CHAR_BIT == 32 && 470 sizeof(int) == sizeof(long) && 471 sizeof(long) == sizeof(void *) && 472 sizeof(off_t) * CHAR_BIT >= 64) 473 return 1; 474 else 475 return -1; 476 #else 477 return (_V6_ILP32_OFFBIG); 478 #endif 479 case _SC_V6_LP64_OFF64: 480 #if _V6_LP64_OFF64 == 0 481 if (sizeof(int) * CHAR_BIT == 32 && 482 sizeof(long) * CHAR_BIT == 64 && 483 sizeof(long) == sizeof(void *) && 484 sizeof(void *) == sizeof(off_t)) 485 return 1; 486 else 487 return -1; 488 #else 489 return (_V6_LP64_OFF64); 490 #endif 491 case _SC_V6_LPBIG_OFFBIG: 492 #if _V6_LPBIG_OFFBIG == 0 493 if (sizeof(int) * CHAR_BIT >= 32 && 494 sizeof(long) * CHAR_BIT >= 64 && 495 sizeof(void *) * CHAR_BIT >= 64 && 496 sizeof(off_t) * CHAR_BIT >= 64) 497 return 1; 498 else 499 return -1; 500 #else 501 return (_V6_LPBIG_OFFBIG); 502 #endif 503 case _SC_ATEXIT_MAX: 504 return (ATEXIT_SIZE); 505 case _SC_IOV_MAX: 506 mib[0] = CTL_KERN; 507 mib[1] = KERN_IOV_MAX; 508 break; 509 case _SC_XOPEN_CRYPT: 510 return (_XOPEN_CRYPT); 511 case _SC_XOPEN_ENH_I18N: 512 return (_XOPEN_ENH_I18N); 513 case _SC_XOPEN_LEGACY: 514 return (_XOPEN_LEGACY); 515 case _SC_XOPEN_REALTIME: 516 #if _XOPEN_REALTIME == 0 517 sverrno = errno; 518 value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 && 519 sysconf(_SC_MEMLOCK) > 0 && 520 sysconf(_SC_MEMLOCK_RANGE) > 0 && 521 sysconf(_SC_MESSAGE_PASSING) > 0 && 522 sysconf(_SC_PRIORITY_SCHEDULING) > 0 && 523 sysconf(_SC_REALTIME_SIGNALS) > 0 && 524 sysconf(_SC_SEMAPHORES) > 0 && 525 sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 && 526 sysconf(_SC_SYNCHRONIZED_IO) > 0 && 527 sysconf(_SC_TIMERS) > 0; 528 errno = sverrno; 529 if (value) 530 return (200112L); 531 else 532 return (-1); 533 #else 534 return (_XOPEN_REALTIME); 535 #endif 536 case _SC_XOPEN_REALTIME_THREADS: 537 #if _XOPEN_REALTIME_THREADS == 0 538 #error "_XOPEN_REALTIME_THREADS" 539 #else 540 return (_XOPEN_REALTIME_THREADS); 541 #endif 542 case _SC_XOPEN_SHM: 543 len = sizeof(lvalue); 544 sverrno = errno; 545 if (sysctlbyname("kern.ipc.shmmin", &lvalue, &len, NULL, 546 0) == -1) { 547 errno = sverrno; 548 return (-1); 549 } 550 errno = sverrno; 551 return (1); 552 case _SC_XOPEN_STREAMS: 553 return (_XOPEN_STREAMS); 554 case _SC_XOPEN_UNIX: 555 return (_XOPEN_UNIX); 556 #ifdef _XOPEN_VERSION 557 case _SC_XOPEN_VERSION: 558 return (_XOPEN_VERSION); 559 #endif 560 #ifdef _XOPEN_XCU_VERSION 561 case _SC_XOPEN_XCU_VERSION: 562 return (_XOPEN_XCU_VERSION); 563 #endif 564 case _SC_SYMLOOP_MAX: 565 return (MAXSYMLINKS); 566 case _SC_RAW_SOCKETS: 567 return (_POSIX_RAW_SOCKETS); 568 case _SC_IPV6: 569 #if _POSIX_IPV6 == 0 570 sverrno = errno; 571 value = _socket(PF_INET6, SOCK_CLOEXEC | SOCK_DGRAM, 0); 572 errno = sverrno; 573 if (value >= 0) { 574 _close(value); 575 return (200112L); 576 } else 577 return (0); 578 #else 579 return (_POSIX_IPV6); 580 #endif 581 582 case _SC_NPROCESSORS_CONF: 583 case _SC_NPROCESSORS_ONLN: 584 if (_elf_aux_info(AT_NCPUS, &value, sizeof(value)) == 0) 585 return ((long)value); 586 mib[0] = CTL_HW; 587 mib[1] = HW_NCPU; 588 break; 589 590 #ifdef _SC_PHYS_PAGES 591 case _SC_PHYS_PAGES: 592 len = sizeof(lvalue); 593 if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1) 594 return (-1); 595 return (lvalue); 596 #endif 597 598 #ifdef _SC_CPUSET_SIZE 599 case _SC_CPUSET_SIZE: 600 len = sizeof(value); 601 if (sysctlbyname("kern.sched.cpusetsize", &value, &len, NULL, 602 0) == -1) 603 return (-1); 604 return ((long)value); 605 #endif 606 case _SC_UEXTERR_MAXLEN: 607 return (UEXTERROR_MAXLEN); 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