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 */ 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 cpuset_t cpus; 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_NSIG: 292 return (_SIG_MAXSIG); 293 case _SC_PAGESIZE: 294 return (getpagesize()); 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 return (-1); 301 case _SC_SEM_VALUE_MAX: 302 return (SEM_VALUE_MAX); 303 case _SC_SIGQUEUE_MAX: 304 mib[0] = CTL_P1003_1B; 305 mib[1] = CTL_P1003_1B_SIGQUEUE_MAX; 306 goto yesno; 307 case _SC_TIMER_MAX: 308 mib[0] = CTL_P1003_1B; 309 mib[1] = CTL_P1003_1B_TIMER_MAX; 310 yesno: 311 len = sizeof(value); 312 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 313 return (-1); 314 if (value == 0) 315 return (defaultresult); 316 return ((long)value); 317 318 case _SC_2_PBS: 319 case _SC_2_PBS_ACCOUNTING: 320 case _SC_2_PBS_CHECKPOINT: 321 case _SC_2_PBS_LOCATE: 322 case _SC_2_PBS_MESSAGE: 323 case _SC_2_PBS_TRACK: 324 #if _POSIX2_PBS == 0 325 #error "don't know how to determine _SC_2_PBS" 326 /* 327 * This probably requires digging through the filesystem 328 * to see if the appropriate package has been installed. 329 * Since we don't currently support this option at all, 330 * it's not worth the effort to write the code now. 331 * Figuring out which of the sub-options are supported 332 * would be even more difficult, so it's probably easier 333 * to always say ``no''. 334 */ 335 #else 336 return (_POSIX2_PBS); 337 #endif 338 case _SC_ADVISORY_INFO: 339 #if _POSIX_ADVISORY_INFO == 0 340 #error "_POSIX_ADVISORY_INFO" 341 #else 342 return (_POSIX_ADVISORY_INFO); 343 #endif 344 case _SC_BARRIERS: 345 #if _POSIX_BARRIERS == 0 346 #error "_POSIX_BARRIERS" 347 #else 348 return (_POSIX_BARRIERS); 349 #endif 350 case _SC_CLOCK_SELECTION: 351 #if _POSIX_CLOCK_SELECTION == 0 352 #error "_POSIX_CLOCK_SELECTION" 353 #else 354 return (_POSIX_CLOCK_SELECTION); 355 #endif 356 case _SC_CPUTIME: 357 return (_POSIX_CPUTIME); 358 #ifdef notdef 359 case _SC_FILE_LOCKING: 360 /* 361 * XXX - The standard doesn't tell us how to define 362 * _POSIX_FILE_LOCKING, so we can't answer this one. 363 */ 364 #endif 365 366 /* 367 * SUSv4tc1 says the following about _SC_GETGR_R_SIZE_MAX and 368 * _SC_GETPW_R_SIZE_MAX: 369 * Note that sysconf(_SC_GETGR_R_SIZE_MAX) may return -1 if 370 * there is no hard limit on the size of the buffer needed to 371 * store all the groups returned. 372 */ 373 case _SC_GETGR_R_SIZE_MAX: 374 case _SC_GETPW_R_SIZE_MAX: 375 return (-1); 376 case _SC_HOST_NAME_MAX: 377 return (MAXHOSTNAMELEN - 1); /* does not include \0 */ 378 case _SC_LOGIN_NAME_MAX: 379 return (MAXLOGNAME); 380 case _SC_MONOTONIC_CLOCK: 381 #if _POSIX_MONOTONIC_CLOCK == 0 382 #error "_POSIX_MONOTONIC_CLOCK" 383 #else 384 return (_POSIX_MONOTONIC_CLOCK); 385 #endif 386 #if _POSIX_MESSAGE_PASSING > -1 387 case _SC_MQ_PRIO_MAX: 388 return (MQ_PRIO_MAX); 389 #endif 390 case _SC_READER_WRITER_LOCKS: 391 return (_POSIX_READER_WRITER_LOCKS); 392 case _SC_REGEXP: 393 return (_POSIX_REGEXP); 394 case _SC_SHELL: 395 return (_POSIX_SHELL); 396 case _SC_SPAWN: 397 return (_POSIX_SPAWN); 398 case _SC_SPIN_LOCKS: 399 return (_POSIX_SPIN_LOCKS); 400 case _SC_SPORADIC_SERVER: 401 #if _POSIX_SPORADIC_SERVER == 0 402 #error "_POSIX_SPORADIC_SERVER" 403 #else 404 return (_POSIX_SPORADIC_SERVER); 405 #endif 406 case _SC_THREAD_ATTR_STACKADDR: 407 return (_POSIX_THREAD_ATTR_STACKADDR); 408 case _SC_THREAD_ATTR_STACKSIZE: 409 return (_POSIX_THREAD_ATTR_STACKSIZE); 410 case _SC_THREAD_CPUTIME: 411 return (_POSIX_THREAD_CPUTIME); 412 case _SC_THREAD_DESTRUCTOR_ITERATIONS: 413 return (PTHREAD_DESTRUCTOR_ITERATIONS); 414 case _SC_THREAD_KEYS_MAX: 415 return (PTHREAD_KEYS_MAX); 416 case _SC_THREAD_PRIO_INHERIT: 417 return (_POSIX_THREAD_PRIO_INHERIT); 418 case _SC_THREAD_PRIO_PROTECT: 419 return (_POSIX_THREAD_PRIO_PROTECT); 420 case _SC_THREAD_PRIORITY_SCHEDULING: 421 return (_POSIX_THREAD_PRIORITY_SCHEDULING); 422 case _SC_THREAD_PROCESS_SHARED: 423 return (_POSIX_THREAD_PROCESS_SHARED); 424 case _SC_THREAD_SAFE_FUNCTIONS: 425 return (_POSIX_THREAD_SAFE_FUNCTIONS); 426 case _SC_THREAD_STACK_MIN: 427 return (PTHREAD_STACK_MIN); 428 case _SC_THREAD_THREADS_MAX: 429 return (PTHREAD_THREADS_MAX); /* XXX wrong type! */ 430 case _SC_TIMEOUTS: 431 return (_POSIX_TIMEOUTS); 432 case _SC_THREADS: 433 return (_POSIX_THREADS); 434 case _SC_TRACE: 435 #if _POSIX_TRACE == 0 436 #error "_POSIX_TRACE" 437 /* While you're implementing this, also do the ones below. */ 438 #else 439 return (_POSIX_TRACE); 440 #endif 441 #if _POSIX_TRACE > -1 442 case _SC_TRACE_EVENT_FILTER: 443 return (_POSIX_TRACE_EVENT_FILTER); 444 case _SC_TRACE_INHERIT: 445 return (_POSIX_TRACE_INHERIT); 446 case _SC_TRACE_LOG: 447 return (_POSIX_TRACE_LOG); 448 #endif 449 case _SC_TTY_NAME_MAX: 450 path = _PATH_DEV; 451 goto do_NAME_MAX; 452 case _SC_TYPED_MEMORY_OBJECTS: 453 #if _POSIX_TYPED_MEMORY_OBJECTS == 0 454 #error "_POSIX_TYPED_MEMORY_OBJECTS" 455 #else 456 return (_POSIX_TYPED_MEMORY_OBJECTS); 457 #endif 458 case _SC_V6_ILP32_OFF32: 459 #if _V6_ILP32_OFF32 == 0 460 if (sizeof(int) * CHAR_BIT == 32 && 461 sizeof(int) == sizeof(long) && 462 sizeof(long) == sizeof(void *) && 463 sizeof(void *) == sizeof(off_t)) 464 return 1; 465 else 466 return -1; 467 #else 468 return (_V6_ILP32_OFF32); 469 #endif 470 case _SC_V6_ILP32_OFFBIG: 471 #if _V6_ILP32_OFFBIG == 0 472 if (sizeof(int) * CHAR_BIT == 32 && 473 sizeof(int) == sizeof(long) && 474 sizeof(long) == sizeof(void *) && 475 sizeof(off_t) * CHAR_BIT >= 64) 476 return 1; 477 else 478 return -1; 479 #else 480 return (_V6_ILP32_OFFBIG); 481 #endif 482 case _SC_V6_LP64_OFF64: 483 #if _V6_LP64_OFF64 == 0 484 if (sizeof(int) * CHAR_BIT == 32 && 485 sizeof(long) * CHAR_BIT == 64 && 486 sizeof(long) == sizeof(void *) && 487 sizeof(void *) == sizeof(off_t)) 488 return 1; 489 else 490 return -1; 491 #else 492 return (_V6_LP64_OFF64); 493 #endif 494 case _SC_V6_LPBIG_OFFBIG: 495 #if _V6_LPBIG_OFFBIG == 0 496 if (sizeof(int) * CHAR_BIT >= 32 && 497 sizeof(long) * CHAR_BIT >= 64 && 498 sizeof(void *) * CHAR_BIT >= 64 && 499 sizeof(off_t) * CHAR_BIT >= 64) 500 return 1; 501 else 502 return -1; 503 #else 504 return (_V6_LPBIG_OFFBIG); 505 #endif 506 case _SC_ATEXIT_MAX: 507 return (ATEXIT_SIZE); 508 case _SC_IOV_MAX: 509 mib[0] = CTL_KERN; 510 mib[1] = KERN_IOV_MAX; 511 break; 512 case _SC_XOPEN_CRYPT: 513 return (_XOPEN_CRYPT); 514 case _SC_XOPEN_ENH_I18N: 515 return (_XOPEN_ENH_I18N); 516 case _SC_XOPEN_LEGACY: 517 return (_XOPEN_LEGACY); 518 case _SC_XOPEN_REALTIME: 519 #if _XOPEN_REALTIME == 0 520 sverrno = errno; 521 value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 && 522 sysconf(_SC_MEMLOCK) > 0 && 523 sysconf(_SC_MEMLOCK_RANGE) > 0 && 524 sysconf(_SC_MESSAGE_PASSING) > 0 && 525 sysconf(_SC_PRIORITY_SCHEDULING) > 0 && 526 sysconf(_SC_REALTIME_SIGNALS) > 0 && 527 sysconf(_SC_SEMAPHORES) > 0 && 528 sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 && 529 sysconf(_SC_SYNCHRONIZED_IO) > 0 && 530 sysconf(_SC_TIMERS) > 0; 531 errno = sverrno; 532 if (value) 533 return (200112L); 534 else 535 return (-1); 536 #else 537 return (_XOPEN_REALTIME); 538 #endif 539 case _SC_XOPEN_REALTIME_THREADS: 540 #if _XOPEN_REALTIME_THREADS == 0 541 #error "_XOPEN_REALTIME_THREADS" 542 #else 543 return (_XOPEN_REALTIME_THREADS); 544 #endif 545 case _SC_XOPEN_SHM: 546 len = sizeof(lvalue); 547 sverrno = errno; 548 if (sysctlbyname("kern.ipc.shmmin", &lvalue, &len, NULL, 549 0) == -1) { 550 errno = sverrno; 551 return (-1); 552 } 553 errno = sverrno; 554 return (1); 555 case _SC_XOPEN_STREAMS: 556 return (_XOPEN_STREAMS); 557 case _SC_XOPEN_UNIX: 558 return (_XOPEN_UNIX); 559 #ifdef _XOPEN_VERSION 560 case _SC_XOPEN_VERSION: 561 return (_XOPEN_VERSION); 562 #endif 563 #ifdef _XOPEN_XCU_VERSION 564 case _SC_XOPEN_XCU_VERSION: 565 return (_XOPEN_XCU_VERSION); 566 #endif 567 case _SC_SYMLOOP_MAX: 568 return (MAXSYMLINKS); 569 case _SC_RAW_SOCKETS: 570 return (_POSIX_RAW_SOCKETS); 571 case _SC_IPV6: 572 #if _POSIX_IPV6 == 0 573 sverrno = errno; 574 value = _socket(PF_INET6, SOCK_CLOEXEC | SOCK_DGRAM, 0); 575 errno = sverrno; 576 if (value >= 0) { 577 _close(value); 578 return (200112L); 579 } else 580 return (0); 581 #else 582 return (_POSIX_IPV6); 583 #endif 584 585 case _SC_NPROCESSORS_ONLN: 586 /* 587 * Consult our root set first, because our CPU availability 588 * may not match the total number of CPUs available on the 589 * system and we may have a non-uniform layout even within 590 * userland. In particular, each jail has a root set that can 591 * be constrained by its parent and processes within the jail 592 * cannot widen beyond those constraints, so to those processes 593 * it makes sense to claim the more limited count. 594 */ 595 if (cpuset_getaffinity(CPU_LEVEL_ROOT, CPU_WHICH_PID, -1, 596 sizeof(cpus), &cpus) == 0) 597 return (CPU_COUNT(&cpus)); 598 /* FALLTHROUGH */ 599 case _SC_NPROCESSORS_CONF: 600 if (_elf_aux_info(AT_NCPUS, &value, sizeof(value)) == 0) 601 return ((long)value); 602 mib[0] = CTL_HW; 603 mib[1] = HW_NCPU; 604 break; 605 606 #ifdef _SC_PHYS_PAGES 607 case _SC_PHYS_PAGES: 608 len = sizeof(lvalue); 609 if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1) 610 return (-1); 611 return (lvalue); 612 #endif 613 614 #ifdef _SC_CPUSET_SIZE 615 case _SC_CPUSET_SIZE: 616 len = sizeof(value); 617 if (sysctlbyname("kern.sched.cpusetsize", &value, &len, NULL, 618 0) == -1) 619 return (-1); 620 return ((long)value); 621 #endif 622 case _SC_UEXTERR_MAXLEN: 623 return (UEXTERROR_MAXLEN); 624 625 default: 626 errno = EINVAL; 627 return (-1); 628 } 629 len = sizeof(value); 630 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 631 value = -1; 632 return ((long)value); 633 } 634