sysconf.c revision 288029
11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * This code is derived from software contributed to Berkeley by 61573Srgrimes * Sean Eric Fagan of Cygnus Support. 71573Srgrimes * 81573Srgrimes * Redistribution and use in source and binary forms, with or without 91573Srgrimes * modification, are permitted provided that the following conditions 101573Srgrimes * are met: 111573Srgrimes * 1. Redistributions of source code must retain the above copyright 121573Srgrimes * notice, this list of conditions and the following disclaimer. 131573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141573Srgrimes * notice, this list of conditions and the following disclaimer in the 151573Srgrimes * documentation and/or other materials provided with the distribution. 161573Srgrimes * 4. Neither the name of the University nor the names of its contributors 171573Srgrimes * may be used to endorse or promote products derived from this software 181573Srgrimes * without specific prior written permission. 191573Srgrimes * 201573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301573Srgrimes * SUCH DAMAGE. 311573Srgrimes */ 321573Srgrimes 331573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 341573Srgrimesstatic char sccsid[] = "@(#)sysconf.c 8.2 (Berkeley) 3/20/94"; 351573Srgrimes#endif /* LIBC_SCCS and not lint */ 3690039Sobrien#include <sys/cdefs.h> 3790039Sobrien__FBSDID("$FreeBSD: head/lib/libc/gen/sysconf.c 288029 2015-09-20 20:23:16Z rodrigc $"); 381573Srgrimes 391573Srgrimes#include <sys/param.h> 4012674Sdg#include <sys/time.h> 411573Srgrimes#include <sys/sysctl.h> 421573Srgrimes#include <sys/resource.h> 43106055Swollman#include <sys/socket.h> 441573Srgrimes 45237660Skib#include <elf.h> 461573Srgrimes#include <errno.h> 47103730Swollman#include <limits.h> 48103730Swollman#include <paths.h> 49103730Swollman#include <pthread.h> /* we just need the limits */ 506171Sbde#include <time.h> 511573Srgrimes#include <unistd.h> 521573Srgrimes 53103730Swollman#include "../stdlib/atexit.h" 54204347Sedwin#include "tzfile.h" /* from ../../../contrib/tzcode/stdtime */ 55237660Skib#include "libc_private.h" 56103730Swollman 57103730Swollman#define _PATH_ZONEINFO TZDIR /* from tzfile.h */ 58103730Swollman 591573Srgrimes/* 601573Srgrimes * sysconf -- 611573Srgrimes * get configurable system variables. 621573Srgrimes * 631573Srgrimes * XXX 641573Srgrimes * POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values 651573Srgrimes * not change during the lifetime of the calling process. This would seem 661573Srgrimes * to require that any change to system limits kill all running processes. 671573Srgrimes * A workaround might be to cache the values when they are first retrieved 681573Srgrimes * and then simply return the cached value on subsequent calls. This is 691573Srgrimes * less useful than returning up-to-date values, however. 701573Srgrimes */ 711573Srgrimeslong 72288029Srodrigcsysconf(int name) 731573Srgrimes{ 741573Srgrimes struct rlimit rl; 751573Srgrimes size_t len; 76103730Swollman int mib[2], sverrno, value; 77168718Spjd long lvalue, defaultresult; 78103730Swollman const char *path; 791573Srgrimes 8036577Smsmith defaultresult = -1; 811573Srgrimes 821573Srgrimes switch (name) { 831573Srgrimes case _SC_ARG_MAX: 841573Srgrimes mib[0] = CTL_KERN; 851573Srgrimes mib[1] = KERN_ARGMAX; 861573Srgrimes break; 871573Srgrimes case _SC_CHILD_MAX: 88103730Swollman if (getrlimit(RLIMIT_NPROC, &rl) != 0) 89103730Swollman return (-1); 90103730Swollman if (rl.rlim_cur == RLIM_INFINITY) 91103730Swollman return (-1); 92103730Swollman if (rl.rlim_cur > LONG_MAX) { 93103730Swollman errno = EOVERFLOW; 94103730Swollman return (-1); 95103730Swollman } 96103730Swollman return ((long)rl.rlim_cur); 971573Srgrimes case _SC_CLK_TCK: 981573Srgrimes return (CLK_TCK); 991573Srgrimes case _SC_NGROUPS_MAX: 1001573Srgrimes mib[0] = CTL_KERN; 1011573Srgrimes mib[1] = KERN_NGROUPS; 1021573Srgrimes break; 1031573Srgrimes case _SC_OPEN_MAX: 104103730Swollman if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 105103730Swollman return (-1); 106103730Swollman if (rl.rlim_cur == RLIM_INFINITY) 107103730Swollman return (-1); 108103730Swollman if (rl.rlim_cur > LONG_MAX) { 109103730Swollman errno = EOVERFLOW; 110103730Swollman return (-1); 111103730Swollman } 112103730Swollman return ((long)rl.rlim_cur); 113176618Swollman case _SC_STREAM_MAX: 114176618Swollman if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 115176618Swollman return (-1); 116176618Swollman if (rl.rlim_cur == RLIM_INFINITY) 117176618Swollman return (-1); 118176618Swollman if (rl.rlim_cur > LONG_MAX) { 119176618Swollman errno = EOVERFLOW; 120176618Swollman return (-1); 121176618Swollman } 122176618Swollman /* 123176618Swollman * struct __sFILE currently has a limitation that 124176618Swollman * file descriptors must fit in a signed short. 125176618Swollman * This doesn't precisely capture the letter of POSIX 126176618Swollman * but approximates the spirit. 127176618Swollman */ 128176618Swollman if (rl.rlim_cur > SHRT_MAX) 129176618Swollman return (SHRT_MAX); 130176618Swollman 131176618Swollman return ((long)rl.rlim_cur); 132103730Swollman case _SC_JOB_CONTROL: 133103730Swollman return (_POSIX_JOB_CONTROL); 1341573Srgrimes case _SC_SAVED_IDS: 135103730Swollman /* XXX - must be 1 */ 1361573Srgrimes mib[0] = CTL_KERN; 1371573Srgrimes mib[1] = KERN_SAVED_IDS; 1381573Srgrimes goto yesno; 1391573Srgrimes case _SC_VERSION: 1401573Srgrimes mib[0] = CTL_KERN; 1411573Srgrimes mib[1] = KERN_POSIX1; 1421573Srgrimes break; 1431573Srgrimes case _SC_BC_BASE_MAX: 144103730Swollman return (BC_BASE_MAX); 1451573Srgrimes case _SC_BC_DIM_MAX: 146103730Swollman return (BC_DIM_MAX); 1471573Srgrimes case _SC_BC_SCALE_MAX: 148103730Swollman return (BC_SCALE_MAX); 1491573Srgrimes case _SC_BC_STRING_MAX: 150103730Swollman return (BC_STRING_MAX); 1511573Srgrimes case _SC_COLL_WEIGHTS_MAX: 152103730Swollman return (COLL_WEIGHTS_MAX); 1531573Srgrimes case _SC_EXPR_NEST_MAX: 154103730Swollman return (EXPR_NEST_MAX); 1551573Srgrimes case _SC_LINE_MAX: 156103730Swollman return (LINE_MAX); 1571573Srgrimes case _SC_RE_DUP_MAX: 158103730Swollman return (RE_DUP_MAX); 1591573Srgrimes case _SC_2_VERSION: 160103730Swollman /* 161103730Swollman * This is something of a lie, but it would be silly at 162103730Swollman * this point to try to deduce this from the contents 163103730Swollman * of the filesystem. 164103730Swollman */ 165103730Swollman return (_POSIX2_VERSION); 1661573Srgrimes case _SC_2_C_BIND: 167103730Swollman return (_POSIX2_C_BIND); 1681573Srgrimes case _SC_2_C_DEV: 169103730Swollman return (_POSIX2_C_DEV); 1701573Srgrimes case _SC_2_CHAR_TERM: 171103730Swollman return (_POSIX2_CHAR_TERM); 1721573Srgrimes case _SC_2_FORT_DEV: 173103730Swollman return (_POSIX2_FORT_DEV); 1741573Srgrimes case _SC_2_FORT_RUN: 175103730Swollman return (_POSIX2_FORT_RUN); 1761573Srgrimes case _SC_2_LOCALEDEF: 177103730Swollman return (_POSIX2_LOCALEDEF); 1781573Srgrimes case _SC_2_SW_DEV: 179103730Swollman return (_POSIX2_SW_DEV); 1801573Srgrimes case _SC_2_UPE: 181103730Swollman return (_POSIX2_UPE); 182103730Swollman case _SC_TZNAME_MAX: 183103730Swollman path = _PATH_ZONEINFO; 184103730Swollmando_NAME_MAX: 185103730Swollman sverrno = errno; 186103730Swollman errno = 0; 187168718Spjd lvalue = pathconf(path, _PC_NAME_MAX); 188168718Spjd if (lvalue == -1 && errno != 0) 189103730Swollman return (-1); 190103730Swollman errno = sverrno; 191168718Spjd return (lvalue); 19234030Sdufault 19334030Sdufault case _SC_ASYNCHRONOUS_IO: 194106055Swollman#if _POSIX_ASYNCHRONOUS_IO == 0 19534925Sdufault mib[0] = CTL_P1003_1B; 19634925Sdufault mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO; 197106055Swollman break; 198106055Swollman#else 199106055Swollman return (_POSIX_ASYNCHRONOUS_IO); 200106055Swollman#endif 20134030Sdufault case _SC_MAPPED_FILES: 202103730Swollman return (_POSIX_MAPPED_FILES); 20334030Sdufault case _SC_MEMLOCK: 204103730Swollman return (_POSIX_MEMLOCK); 20534030Sdufault case _SC_MEMLOCK_RANGE: 206103730Swollman return (_POSIX_MEMLOCK_RANGE); 20734030Sdufault case _SC_MEMORY_PROTECTION: 208103730Swollman return (_POSIX_MEMORY_PROTECTION); 20934030Sdufault case _SC_MESSAGE_PASSING: 210103730Swollman#if _POSIX_MESSAGE_PASSING == 0 21134925Sdufault mib[0] = CTL_P1003_1B; 21234925Sdufault mib[1] = CTL_P1003_1B_MESSAGE_PASSING; 21334030Sdufault goto yesno; 214103730Swollman#else 215103730Swollman return (_POSIX_MESSAGE_PASSING); 216103730Swollman#endif 21734030Sdufault case _SC_PRIORITIZED_IO: 218103730Swollman#if _POSIX_PRIORITIZED_IO == 0 21934925Sdufault mib[0] = CTL_P1003_1B; 22034925Sdufault mib[1] = CTL_P1003_1B_PRIORITIZED_IO; 22134030Sdufault goto yesno; 222103730Swollman#else 223103730Swollman return (_POSIX_PRIORITIZED_IO); 224103730Swollman#endif 22534030Sdufault case _SC_PRIORITY_SCHEDULING: 226103730Swollman#if _POSIX_PRIORITY_SCHEDULING == 0 22734925Sdufault mib[0] = CTL_P1003_1B; 22834925Sdufault mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING; 22934030Sdufault goto yesno; 230103730Swollman#else 231103730Swollman return (_POSIX_PRIORITY_SCHEDULING); 232103730Swollman#endif 23334030Sdufault case _SC_REALTIME_SIGNALS: 234103730Swollman#if _POSIX_REALTIME_SIGNALS == 0 23534925Sdufault mib[0] = CTL_P1003_1B; 23634925Sdufault mib[1] = CTL_P1003_1B_REALTIME_SIGNALS; 23734030Sdufault goto yesno; 238103730Swollman#else 239103730Swollman return (_POSIX_REALTIME_SIGNALS); 240103730Swollman#endif 24134030Sdufault case _SC_SEMAPHORES: 242103730Swollman#if _POSIX_SEMAPHORES == 0 24334925Sdufault mib[0] = CTL_P1003_1B; 24434925Sdufault mib[1] = CTL_P1003_1B_SEMAPHORES; 24534030Sdufault goto yesno; 246103730Swollman#else 247103730Swollman return (_POSIX_SEMAPHORES); 248103730Swollman#endif 249103730Swollman case _SC_FSYNC: 250103730Swollman return (_POSIX_FSYNC); 251103730Swollman 25234030Sdufault case _SC_SHARED_MEMORY_OBJECTS: 253103730Swollman return (_POSIX_SHARED_MEMORY_OBJECTS); 25434030Sdufault case _SC_SYNCHRONIZED_IO: 255103730Swollman#if _POSIX_SYNCHRONIZED_IO == 0 25634925Sdufault mib[0] = CTL_P1003_1B; 25734925Sdufault mib[1] = CTL_P1003_1B_SYNCHRONIZED_IO; 25834030Sdufault goto yesno; 259103730Swollman#else 260103730Swollman return (_POSIX_SYNCHRONIZED_IO); 261103730Swollman#endif 26234030Sdufault case _SC_TIMERS: 263103730Swollman#if _POSIX_TIMERS == 0 26434925Sdufault mib[0] = CTL_P1003_1B; 26534925Sdufault mib[1] = CTL_P1003_1B_TIMERS; 26634030Sdufault goto yesno; 267103730Swollman#else 268103730Swollman return (_POSIX_TIMERS); 269103730Swollman#endif 27034030Sdufault case _SC_AIO_LISTIO_MAX: 27134925Sdufault mib[0] = CTL_P1003_1B; 27234925Sdufault mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX; 273107000Sdougb break; 27434030Sdufault case _SC_AIO_MAX: 27534925Sdufault mib[0] = CTL_P1003_1B; 27634925Sdufault mib[1] = CTL_P1003_1B_AIO_MAX; 277107000Sdougb break; 27834030Sdufault case _SC_AIO_PRIO_DELTA_MAX: 27934925Sdufault mib[0] = CTL_P1003_1B; 28034925Sdufault mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX; 281107000Sdougb break; 28234030Sdufault case _SC_DELAYTIMER_MAX: 28334925Sdufault mib[0] = CTL_P1003_1B; 28434925Sdufault mib[1] = CTL_P1003_1B_DELAYTIMER_MAX; 28534030Sdufault goto yesno; 28634030Sdufault case _SC_MQ_OPEN_MAX: 28734925Sdufault mib[0] = CTL_P1003_1B; 28834925Sdufault mib[1] = CTL_P1003_1B_MQ_OPEN_MAX; 28934030Sdufault goto yesno; 29034030Sdufault case _SC_PAGESIZE: 29136577Smsmith defaultresult = getpagesize(); 29234925Sdufault mib[0] = CTL_P1003_1B; 29334925Sdufault mib[1] = CTL_P1003_1B_PAGESIZE; 29434030Sdufault goto yesno; 29534030Sdufault case _SC_RTSIG_MAX: 29634925Sdufault mib[0] = CTL_P1003_1B; 29734925Sdufault mib[1] = CTL_P1003_1B_RTSIG_MAX; 29834030Sdufault goto yesno; 29934030Sdufault case _SC_SEM_NSEMS_MAX: 30034925Sdufault mib[0] = CTL_P1003_1B; 30134925Sdufault mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX; 30234030Sdufault goto yesno; 30334030Sdufault case _SC_SEM_VALUE_MAX: 30434925Sdufault mib[0] = CTL_P1003_1B; 30534925Sdufault mib[1] = CTL_P1003_1B_SEM_VALUE_MAX; 30634030Sdufault goto yesno; 30734030Sdufault case _SC_SIGQUEUE_MAX: 30834925Sdufault mib[0] = CTL_P1003_1B; 30934925Sdufault mib[1] = CTL_P1003_1B_SIGQUEUE_MAX; 31034030Sdufault goto yesno; 31134030Sdufault case _SC_TIMER_MAX: 31234925Sdufault mib[0] = CTL_P1003_1B; 31334925Sdufault mib[1] = CTL_P1003_1B_TIMER_MAX; 314168718Spjdyesno: 315168718Spjd len = sizeof(value); 316168718Spjd if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 317103730Swollman return (-1); 318103730Swollman if (value == 0) 319103730Swollman return (defaultresult); 320168718Spjd return ((long)value); 321100142Swollman 322103730Swollman case _SC_2_PBS: 323103730Swollman case _SC_2_PBS_ACCOUNTING: 324103730Swollman case _SC_2_PBS_CHECKPOINT: 325103730Swollman case _SC_2_PBS_LOCATE: 326103730Swollman case _SC_2_PBS_MESSAGE: 327103730Swollman case _SC_2_PBS_TRACK: 328103730Swollman#if _POSIX2_PBS == 0 329103730Swollman#error "don't know how to determine _SC_2_PBS" 330103730Swollman /* 331103730Swollman * This probably requires digging through the filesystem 332103730Swollman * to see if the appropriate package has been installed. 333103730Swollman * Since we don't currently support this option at all, 334103730Swollman * it's not worth the effort to write the code now. 335103730Swollman * Figuring out which of the sub-options are supported 336103730Swollman * would be even more difficult, so it's probably easier 337103730Swollman * to always say ``no''. 338103730Swollman */ 339103730Swollman#else 340103730Swollman return (_POSIX2_PBS); 34187161Sjkoshy#endif 342103730Swollman case _SC_ADVISORY_INFO: 343103730Swollman#if _POSIX_ADVISORY_INFO == 0 344103730Swollman#error "_POSIX_ADVISORY_INFO" 345103730Swollman#else 346103730Swollman return (_POSIX_ADVISORY_INFO); 347103730Swollman#endif 348103730Swollman case _SC_BARRIERS: 349103730Swollman#if _POSIX_BARRIERS == 0 350103730Swollman#error "_POSIX_BARRIERS" 351103730Swollman#else 352103730Swollman return (_POSIX_BARRIERS); 353103730Swollman#endif 354103730Swollman case _SC_CLOCK_SELECTION: 355103730Swollman#if _POSIX_CLOCK_SELECTION == 0 356103730Swollman#error "_POSIX_CLOCK_SELECTION" 357103730Swollman#else 358103730Swollman return (_POSIX_CLOCK_SELECTION); 359103730Swollman#endif 360103730Swollman case _SC_CPUTIME: 361103730Swollman return (_POSIX_CPUTIME); 362103730Swollman#ifdef notdef 363103730Swollman case _SC_FILE_LOCKING: 364103730Swollman /* 365103730Swollman * XXX - The standard doesn't tell us how to define 366103730Swollman * _POSIX_FILE_LOCKING, so we can't answer this one. 367103730Swollman */ 368103730Swollman#endif 369268467Skib 370268467Skib /* 371268467Skib * SUSv4tc1 says the following about _SC_GETGR_R_SIZE_MAX and 372268467Skib * _SC_GETPW_R_SIZE_MAX: 373268467Skib * Note that sysconf(_SC_GETGR_R_SIZE_MAX) may return -1 if 374268467Skib * there is no hard limit on the size of the buffer needed to 375268467Skib * store all the groups returned. 376268467Skib */ 377103730Swollman case _SC_GETGR_R_SIZE_MAX: 378103730Swollman case _SC_GETPW_R_SIZE_MAX: 379268467Skib return (-1); 380103730Swollman case _SC_HOST_NAME_MAX: 381103730Swollman return (MAXHOSTNAMELEN - 1); /* does not include \0 */ 382103730Swollman case _SC_LOGIN_NAME_MAX: 383103730Swollman return (MAXLOGNAME); 384103730Swollman case _SC_MONOTONIC_CLOCK: 385103730Swollman#if _POSIX_MONOTONIC_CLOCK == 0 386103730Swollman#error "_POSIX_MONOTONIC_CLOCK" 387103730Swollman#else 388103730Swollman return (_POSIX_MONOTONIC_CLOCK); 389103730Swollman#endif 390103730Swollman#if _POSIX_MESSAGE_PASSING > -1 391103730Swollman case _SC_MQ_PRIO_MAX: 392103730Swollman return (MQ_PRIO_MAX); 393103730Swollman#endif 394103730Swollman case _SC_READER_WRITER_LOCKS: 395103730Swollman return (_POSIX_READER_WRITER_LOCKS); 396103730Swollman case _SC_REGEXP: 397103730Swollman return (_POSIX_REGEXP); 398103730Swollman case _SC_SHELL: 399103730Swollman return (_POSIX_SHELL); 400103730Swollman case _SC_SPAWN: 401103730Swollman return (_POSIX_SPAWN); 402103730Swollman case _SC_SPIN_LOCKS: 403103730Swollman return (_POSIX_SPIN_LOCKS); 404103730Swollman case _SC_SPORADIC_SERVER: 405103730Swollman#if _POSIX_SPORADIC_SERVER == 0 406103730Swollman#error "_POSIX_SPORADIC_SERVER" 407103730Swollman#else 408103730Swollman return (_POSIX_SPORADIC_SERVER); 409103730Swollman#endif 410103730Swollman case _SC_THREAD_ATTR_STACKADDR: 411103730Swollman return (_POSIX_THREAD_ATTR_STACKADDR); 412103730Swollman case _SC_THREAD_ATTR_STACKSIZE: 413103730Swollman return (_POSIX_THREAD_ATTR_STACKSIZE); 414103730Swollman case _SC_THREAD_CPUTIME: 415103730Swollman return (_POSIX_THREAD_CPUTIME); 416103730Swollman case _SC_THREAD_DESTRUCTOR_ITERATIONS: 417103730Swollman return (PTHREAD_DESTRUCTOR_ITERATIONS); 418103730Swollman case _SC_THREAD_KEYS_MAX: 419103730Swollman return (PTHREAD_KEYS_MAX); 420103730Swollman case _SC_THREAD_PRIO_INHERIT: 421103730Swollman return (_POSIX_THREAD_PRIO_INHERIT); 422103730Swollman case _SC_THREAD_PRIO_PROTECT: 423103730Swollman return (_POSIX_THREAD_PRIO_PROTECT); 424103730Swollman case _SC_THREAD_PRIORITY_SCHEDULING: 425103730Swollman return (_POSIX_THREAD_PRIORITY_SCHEDULING); 426103730Swollman case _SC_THREAD_PROCESS_SHARED: 427103730Swollman return (_POSIX_THREAD_PROCESS_SHARED); 428103730Swollman case _SC_THREAD_SAFE_FUNCTIONS: 429103730Swollman return (_POSIX_THREAD_SAFE_FUNCTIONS); 430103730Swollman case _SC_THREAD_STACK_MIN: 431103730Swollman return (PTHREAD_STACK_MIN); 432103730Swollman case _SC_THREAD_THREADS_MAX: 433103730Swollman return (PTHREAD_THREADS_MAX); /* XXX wrong type! */ 434103730Swollman case _SC_TIMEOUTS: 435103730Swollman return (_POSIX_TIMEOUTS); 436103730Swollman case _SC_THREADS: 437103730Swollman return (_POSIX_THREADS); 438103730Swollman case _SC_TRACE: 439103730Swollman#if _POSIX_TRACE == 0 440103730Swollman#error "_POSIX_TRACE" 441103730Swollman /* While you're implementing this, also do the ones below. */ 442103730Swollman#else 443103730Swollman return (_POSIX_TRACE); 444103730Swollman#endif 445103730Swollman#if _POSIX_TRACE > -1 446103730Swollman case _SC_TRACE_EVENT_FILTER: 447103730Swollman return (_POSIX_TRACE_EVENT_FILTER); 448103730Swollman case _SC_TRACE_INHERIT: 449103730Swollman return (_POSIX_TRACE_INHERIT); 450103730Swollman case _SC_TRACE_LOG: 451103730Swollman return (_POSIX_TRACE_LOG); 452103730Swollman#endif 453103730Swollman case _SC_TTY_NAME_MAX: 454103730Swollman path = _PATH_DEV; 455103730Swollman goto do_NAME_MAX; 456103730Swollman case _SC_TYPED_MEMORY_OBJECTS: 457103730Swollman#if _POSIX_TYPED_MEMORY_OBJECTS == 0 458103730Swollman#error "_POSIX_TYPED_MEMORY_OBJECTS" 459103730Swollman#else 460103730Swollman return (_POSIX_TYPED_MEMORY_OBJECTS); 461103730Swollman#endif 462103730Swollman case _SC_V6_ILP32_OFF32: 463103730Swollman#if _V6_ILP32_OFF32 == 0 464103730Swollman if (sizeof(int) * CHAR_BIT == 32 && 465103730Swollman sizeof(int) == sizeof(long) && 466103730Swollman sizeof(long) == sizeof(void *) && 467103730Swollman sizeof(void *) == sizeof(off_t)) 468103730Swollman return 1; 469103730Swollman else 470103730Swollman return -1; 471103730Swollman#else 472103730Swollman return (_V6_ILP32_OFF32); 473103730Swollman#endif 474103730Swollman case _SC_V6_ILP32_OFFBIG: 475103730Swollman#if _V6_ILP32_OFFBIG == 0 476103730Swollman if (sizeof(int) * CHAR_BIT == 32 && 477103730Swollman sizeof(int) == sizeof(long) && 478103730Swollman sizeof(long) == sizeof(void *) && 479103730Swollman sizeof(off_t) * CHAR_BIT >= 64) 480103730Swollman return 1; 481103730Swollman else 482103730Swollman return -1; 483103730Swollman#else 484103730Swollman return (_V6_ILP32_OFFBIG); 485103730Swollman#endif 486103730Swollman case _SC_V6_LP64_OFF64: 487103730Swollman#if _V6_LP64_OFF64 == 0 488103730Swollman if (sizeof(int) * CHAR_BIT == 32 && 489103730Swollman sizeof(long) * CHAR_BIT == 64 && 490103730Swollman sizeof(long) == sizeof(void *) && 491103730Swollman sizeof(void *) == sizeof(off_t)) 492103730Swollman return 1; 493103730Swollman else 494103730Swollman return -1; 495103730Swollman#else 496103730Swollman return (_V6_LP64_OFF64); 497103730Swollman#endif 498103730Swollman case _SC_V6_LPBIG_OFFBIG: 499103730Swollman#if _V6_LPBIG_OFFBIG == 0 500103730Swollman if (sizeof(int) * CHAR_BIT >= 32 && 501103730Swollman sizeof(long) * CHAR_BIT >= 64 && 502103730Swollman sizeof(void *) * CHAR_BIT >= 64 && 503103730Swollman sizeof(off_t) * CHAR_BIT >= 64) 504103730Swollman return 1; 505103730Swollman else 506103730Swollman return -1; 507103730Swollman#else 508103730Swollman return (_V6_LPBIG_OFFBIG); 509103730Swollman#endif 510103730Swollman case _SC_ATEXIT_MAX: 511103730Swollman return (ATEXIT_SIZE); 51278431Swollman case _SC_IOV_MAX: 51378431Swollman mib[0] = CTL_KERN; 51478431Swollman mib[1] = KERN_IOV_MAX; 51578431Swollman break; 516103730Swollman case _SC_XOPEN_CRYPT: 517103730Swollman return (_XOPEN_CRYPT); 518103730Swollman case _SC_XOPEN_ENH_I18N: 519103730Swollman return (_XOPEN_ENH_I18N); 520103730Swollman case _SC_XOPEN_LEGACY: 521103730Swollman return (_XOPEN_LEGACY); 522103730Swollman case _SC_XOPEN_REALTIME: 523103730Swollman#if _XOPEN_REALTIME == 0 524103730Swollman sverrno = errno; 525103730Swollman value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 && 526103730Swollman sysconf(_SC_MEMLOCK) > 0 && 527103730Swollman sysconf(_SC_MEMLOCK_RANGE) > 0 && 528103730Swollman sysconf(_SC_MESSAGE_PASSING) > 0 && 529103730Swollman sysconf(_SC_PRIORITY_SCHEDULING) > 0 && 530103730Swollman sysconf(_SC_REALTIME_SIGNALS) > 0 && 531103730Swollman sysconf(_SC_SEMAPHORES) > 0 && 532103730Swollman sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 && 533103730Swollman sysconf(_SC_SYNCHRONIZED_IO) > 0 && 534103730Swollman sysconf(_SC_TIMERS) > 0; 535103730Swollman errno = sverrno; 536103730Swollman if (value) 537103730Swollman return (200112L); 538103730Swollman else 539103730Swollman return (-1); 540103730Swollman#else 541103730Swollman return (_XOPEN_REALTIME); 54278431Swollman#endif 543103730Swollman case _SC_XOPEN_REALTIME_THREADS: 544103730Swollman#if _XOPEN_REALTIME_THREADS == 0 545103730Swollman#error "_XOPEN_REALTIME_THREADS" 546103730Swollman#else 547103730Swollman return (_XOPEN_REALTIME_THREADS); 548103730Swollman#endif 549103730Swollman case _SC_XOPEN_SHM: 550168718Spjd len = sizeof(lvalue); 551103730Swollman sverrno = errno; 552168718Spjd if (sysctlbyname("kern.ipc.shmmin", &lvalue, &len, NULL, 553103730Swollman 0) == -1) { 554103730Swollman errno = sverrno; 555103730Swollman return (-1); 556103730Swollman } 557103730Swollman errno = sverrno; 558103730Swollman return (1); 559103730Swollman case _SC_XOPEN_STREAMS: 560103730Swollman return (_XOPEN_STREAMS); 561103730Swollman case _SC_XOPEN_UNIX: 562103730Swollman return (_XOPEN_UNIX); 563103730Swollman#ifdef _XOPEN_VERSION 564103730Swollman case _SC_XOPEN_VERSION: 565103730Swollman return (_XOPEN_VERSION); 566103730Swollman#endif 567103730Swollman#ifdef _XOPEN_XCU_VERSION 568103730Swollman case _SC_XOPEN_XCU_VERSION: 569103730Swollman return (_XOPEN_XCU_VERSION); 570103730Swollman#endif 571106055Swollman case _SC_SYMLOOP_MAX: 572106055Swollman return (MAXSYMLINKS); 573106055Swollman case _SC_RAW_SOCKETS: 574106055Swollman return (_POSIX_RAW_SOCKETS); 575106055Swollman case _SC_IPV6: 576106055Swollman#if _POSIX_IPV6 == 0 577106055Swollman sverrno = errno; 578106055Swollman value = socket(PF_INET6, SOCK_DGRAM, 0); 579106055Swollman errno = sverrno; 580106055Swollman if (value >= 0) { 581106055Swollman close(value); 582106055Swollman return (200112L); 583106055Swollman } else 584106055Swollman return (0); 585106055Swollman#else 586106055Swollman return (_POSIX_IPV6); 587106055Swollman#endif 58878431Swollman 589103730Swollman case _SC_NPROCESSORS_CONF: 590103730Swollman case _SC_NPROCESSORS_ONLN: 591237660Skib if (_elf_aux_info(AT_NCPUS, &value, sizeof(value)) == 0) 592237660Skib return ((long)value); 593103730Swollman mib[0] = CTL_HW; 594103730Swollman mib[1] = HW_NCPU; 595103730Swollman break; 596103730Swollman 597165232Simp#ifdef _SC_PHYS_PAGES 598165212Spjd case _SC_PHYS_PAGES: 599168718Spjd len = sizeof(lvalue); 600168718Spjd if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1) 601168718Spjd return (-1); 602168718Spjd return (lvalue); 603165232Simp#endif 604165212Spjd 605214510Sdavidxu#ifdef _SC_CPUSET_SIZE 606214510Sdavidxu case _SC_CPUSET_SIZE: 607223136Sdavidxu len = sizeof(value); 608223136Sdavidxu if (sysctlbyname("kern.sched.cpusetsize", &value, &len, NULL, 609214510Sdavidxu 0) == -1) 610214510Sdavidxu return (-1); 611223136Sdavidxu return ((long)value); 612214510Sdavidxu#endif 613214510Sdavidxu 6141573Srgrimes default: 6151573Srgrimes errno = EINVAL; 6161573Srgrimes return (-1); 6171573Srgrimes } 618168718Spjd len = sizeof(value); 619168718Spjd if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 620168718Spjd value = -1; 621168718Spjd return ((long)value); 6221573Srgrimes} 623