sysconf.c revision 103730
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 * 3. All advertising materials mentioning features or use of this software 171573Srgrimes * must display the following acknowledgement: 181573Srgrimes * This product includes software developed by the University of 191573Srgrimes * California, Berkeley and its contributors. 201573Srgrimes * 4. Neither the name of the University nor the names of its contributors 211573Srgrimes * may be used to endorse or promote products derived from this software 221573Srgrimes * without specific prior written permission. 231573Srgrimes * 241573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341573Srgrimes * SUCH DAMAGE. 351573Srgrimes */ 361573Srgrimes 371573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 381573Srgrimesstatic char sccsid[] = "@(#)sysconf.c 8.2 (Berkeley) 3/20/94"; 391573Srgrimes#endif /* LIBC_SCCS and not lint */ 4090039Sobrien#include <sys/cdefs.h> 4190039Sobrien__FBSDID("$FreeBSD: head/lib/libc/gen/sysconf.c 103730 2002-09-21 02:14:04Z wollman $"); 421573Srgrimes 431573Srgrimes#include <sys/param.h> 4412674Sdg#include <sys/time.h> 451573Srgrimes#include <sys/sysctl.h> 461573Srgrimes#include <sys/resource.h> 471573Srgrimes 481573Srgrimes#include <errno.h> 49103730Swollman#include <limits.h> 50103730Swollman#include <paths.h> 51103730Swollman#include <pthread.h> /* we just need the limits */ 526171Sbde#include <time.h> 531573Srgrimes#include <unistd.h> 541573Srgrimes 55103730Swollman#include "../stdlib/atexit.h" 56103730Swollman#include "../stdtime/tzfile.h" 57103730Swollman 58103730Swollman#define _PATH_ZONEINFO TZDIR /* from tzfile.h */ 59103730Swollman 601573Srgrimes/* 611573Srgrimes * sysconf -- 621573Srgrimes * get configurable system variables. 631573Srgrimes * 641573Srgrimes * XXX 651573Srgrimes * POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values 661573Srgrimes * not change during the lifetime of the calling process. This would seem 671573Srgrimes * to require that any change to system limits kill all running processes. 681573Srgrimes * A workaround might be to cache the values when they are first retrieved 691573Srgrimes * and then simply return the cached value on subsequent calls. This is 701573Srgrimes * less useful than returning up-to-date values, however. 711573Srgrimes */ 721573Srgrimeslong 731573Srgrimessysconf(name) 741573Srgrimes int name; 751573Srgrimes{ 761573Srgrimes struct rlimit rl; 771573Srgrimes size_t len; 78103730Swollman int mib[2], sverrno, value; 7936577Smsmith long defaultresult; 80103730Swollman const char *path; 811573Srgrimes 821573Srgrimes len = sizeof(value); 8336577Smsmith defaultresult = -1; 841573Srgrimes 851573Srgrimes switch (name) { 861573Srgrimes case _SC_ARG_MAX: 871573Srgrimes mib[0] = CTL_KERN; 881573Srgrimes mib[1] = KERN_ARGMAX; 891573Srgrimes break; 901573Srgrimes case _SC_CHILD_MAX: 91103730Swollman if (getrlimit(RLIMIT_NPROC, &rl) != 0) 92103730Swollman return (-1); 93103730Swollman if (rl.rlim_cur == RLIM_INFINITY) 94103730Swollman return (-1); 95103730Swollman if (rl.rlim_cur > LONG_MAX) { 96103730Swollman errno = EOVERFLOW; 97103730Swollman return (-1); 98103730Swollman } 99103730Swollman return ((long)rl.rlim_cur); 1001573Srgrimes case _SC_CLK_TCK: 1011573Srgrimes return (CLK_TCK); 1021573Srgrimes case _SC_NGROUPS_MAX: 1031573Srgrimes mib[0] = CTL_KERN; 1041573Srgrimes mib[1] = KERN_NGROUPS; 1051573Srgrimes break; 1061573Srgrimes case _SC_OPEN_MAX: 107103730Swollman case _SC_STREAM_MAX: /* assume fds run out before memory does */ 108103730Swollman if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 109103730Swollman return (-1); 110103730Swollman if (rl.rlim_cur == RLIM_INFINITY) 111103730Swollman return (-1); 112103730Swollman if (rl.rlim_cur > LONG_MAX) { 113103730Swollman errno = EOVERFLOW; 114103730Swollman return (-1); 115103730Swollman } 116103730Swollman return ((long)rl.rlim_cur); 117103730Swollman case _SC_JOB_CONTROL: 118103730Swollman return (_POSIX_JOB_CONTROL); 1191573Srgrimes case _SC_SAVED_IDS: 120103730Swollman /* XXX - must be 1 */ 1211573Srgrimes mib[0] = CTL_KERN; 1221573Srgrimes mib[1] = KERN_SAVED_IDS; 1231573Srgrimes goto yesno; 1241573Srgrimes case _SC_VERSION: 1251573Srgrimes mib[0] = CTL_KERN; 1261573Srgrimes mib[1] = KERN_POSIX1; 1271573Srgrimes break; 1281573Srgrimes case _SC_BC_BASE_MAX: 129103730Swollman return (BC_BASE_MAX); 1301573Srgrimes case _SC_BC_DIM_MAX: 131103730Swollman return (BC_DIM_MAX); 1321573Srgrimes case _SC_BC_SCALE_MAX: 133103730Swollman return (BC_SCALE_MAX); 1341573Srgrimes case _SC_BC_STRING_MAX: 135103730Swollman return (BC_STRING_MAX); 1361573Srgrimes case _SC_COLL_WEIGHTS_MAX: 137103730Swollman return (COLL_WEIGHTS_MAX); 1381573Srgrimes case _SC_EXPR_NEST_MAX: 139103730Swollman return (EXPR_NEST_MAX); 1401573Srgrimes case _SC_LINE_MAX: 141103730Swollman return (LINE_MAX); 1421573Srgrimes case _SC_RE_DUP_MAX: 143103730Swollman return (RE_DUP_MAX); 1441573Srgrimes case _SC_2_VERSION: 145103730Swollman /* 146103730Swollman * This is something of a lie, but it would be silly at 147103730Swollman * this point to try to deduce this from the contents 148103730Swollman * of the filesystem. 149103730Swollman */ 150103730Swollman return (_POSIX2_VERSION); 1511573Srgrimes case _SC_2_C_BIND: 152103730Swollman return (_POSIX2_C_BIND); 1531573Srgrimes case _SC_2_C_DEV: 154103730Swollman return (_POSIX2_C_DEV); 1551573Srgrimes case _SC_2_CHAR_TERM: 156103730Swollman return (_POSIX2_CHAR_TERM); 1571573Srgrimes case _SC_2_FORT_DEV: 158103730Swollman return (_POSIX2_FORT_DEV); 1591573Srgrimes case _SC_2_FORT_RUN: 160103730Swollman return (_POSIX2_FORT_RUN); 1611573Srgrimes case _SC_2_LOCALEDEF: 162103730Swollman return (_POSIX2_LOCALEDEF); 1631573Srgrimes case _SC_2_SW_DEV: 164103730Swollman return (_POSIX2_SW_DEV); 1651573Srgrimes case _SC_2_UPE: 166103730Swollman return (_POSIX2_UPE); 167103730Swollman case _SC_TZNAME_MAX: 168103730Swollman path = _PATH_ZONEINFO; 169103730Swollmando_NAME_MAX: 170103730Swollman sverrno = errno; 171103730Swollman errno = 0; 172103730Swollman value = pathconf(path, _PC_NAME_MAX); 173103730Swollman if (value == -1 && errno != 0) 174103730Swollman return (-1); 175103730Swollman errno = sverrno; 176103730Swollman return (value); 17734030Sdufault 17834030Sdufault case _SC_ASYNCHRONOUS_IO: 17934925Sdufault mib[0] = CTL_P1003_1B; 18034925Sdufault mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO; 18134030Sdufault goto yesno; 18234030Sdufault case _SC_MAPPED_FILES: 183103730Swollman return (_POSIX_MAPPED_FILES); 18434030Sdufault case _SC_MEMLOCK: 185103730Swollman return (_POSIX_MEMLOCK); 18634030Sdufault case _SC_MEMLOCK_RANGE: 187103730Swollman return (_POSIX_MEMLOCK_RANGE); 18834030Sdufault case _SC_MEMORY_PROTECTION: 189103730Swollman return (_POSIX_MEMORY_PROTECTION); 19034030Sdufault case _SC_MESSAGE_PASSING: 191103730Swollman#if _POSIX_MESSAGE_PASSING == 0 19234925Sdufault mib[0] = CTL_P1003_1B; 19334925Sdufault mib[1] = CTL_P1003_1B_MESSAGE_PASSING; 19434030Sdufault goto yesno; 195103730Swollman#else 196103730Swollman return (_POSIX_MESSAGE_PASSING); 197103730Swollman#endif 19834030Sdufault case _SC_PRIORITIZED_IO: 199103730Swollman#if _POSIX_PRIORITIZED_IO == 0 20034925Sdufault mib[0] = CTL_P1003_1B; 20134925Sdufault mib[1] = CTL_P1003_1B_PRIORITIZED_IO; 20234030Sdufault goto yesno; 203103730Swollman#else 204103730Swollman return (_POSIX_PRIORITIZED_IO); 205103730Swollman#endif 20634030Sdufault case _SC_PRIORITY_SCHEDULING: 207103730Swollman#if _POSIX_PRIORITY_SCHEDULING == 0 20834925Sdufault mib[0] = CTL_P1003_1B; 20934925Sdufault mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING; 21034030Sdufault goto yesno; 211103730Swollman#else 212103730Swollman return (_POSIX_PRIORITY_SCHEDULING); 213103730Swollman#endif 21434030Sdufault case _SC_REALTIME_SIGNALS: 215103730Swollman#if _POSIX_REALTIME_SIGNALS == 0 21634925Sdufault mib[0] = CTL_P1003_1B; 21734925Sdufault mib[1] = CTL_P1003_1B_REALTIME_SIGNALS; 21834030Sdufault goto yesno; 219103730Swollman#else 220103730Swollman return (_POSIX_REALTIME_SIGNALS); 221103730Swollman#endif 22234030Sdufault case _SC_SEMAPHORES: 223103730Swollman#if _POSIX_SEMAPHORES == 0 22434925Sdufault mib[0] = CTL_P1003_1B; 22534925Sdufault mib[1] = CTL_P1003_1B_SEMAPHORES; 22634030Sdufault goto yesno; 227103730Swollman#else 228103730Swollman return (_POSIX_SEMAPHORES); 229103730Swollman#endif 230103730Swollman case _SC_FSYNC: 231103730Swollman return (_POSIX_FSYNC); 232103730Swollman 23334030Sdufault case _SC_SHARED_MEMORY_OBJECTS: 234103730Swollman return (_POSIX_SHARED_MEMORY_OBJECTS); 23534030Sdufault case _SC_SYNCHRONIZED_IO: 236103730Swollman#if _POSIX_SYNCHRONIZED_IO == 0 23734925Sdufault mib[0] = CTL_P1003_1B; 23834925Sdufault mib[1] = CTL_P1003_1B_SYNCHRONIZED_IO; 23934030Sdufault goto yesno; 240103730Swollman#else 241103730Swollman return (_POSIX_SYNCHRONIZED_IO); 242103730Swollman#endif 24334030Sdufault case _SC_TIMERS: 244103730Swollman#if _POSIX_TIMERS == 0 24534925Sdufault mib[0] = CTL_P1003_1B; 24634925Sdufault mib[1] = CTL_P1003_1B_TIMERS; 24734030Sdufault goto yesno; 248103730Swollman#else 249103730Swollman return (_POSIX_TIMERS); 250103730Swollman#endif 25134030Sdufault case _SC_AIO_LISTIO_MAX: 25234925Sdufault mib[0] = CTL_P1003_1B; 25334925Sdufault mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX; 25434030Sdufault goto yesno; 25534030Sdufault case _SC_AIO_MAX: 25634925Sdufault mib[0] = CTL_P1003_1B; 25734925Sdufault mib[1] = CTL_P1003_1B_AIO_MAX; 25834030Sdufault goto yesno; 25934030Sdufault case _SC_AIO_PRIO_DELTA_MAX: 26034925Sdufault mib[0] = CTL_P1003_1B; 26134925Sdufault mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX; 26234030Sdufault goto yesno; 26334030Sdufault case _SC_DELAYTIMER_MAX: 26434925Sdufault mib[0] = CTL_P1003_1B; 26534925Sdufault mib[1] = CTL_P1003_1B_DELAYTIMER_MAX; 26634030Sdufault goto yesno; 26734030Sdufault case _SC_MQ_OPEN_MAX: 26834925Sdufault mib[0] = CTL_P1003_1B; 26934925Sdufault mib[1] = CTL_P1003_1B_MQ_OPEN_MAX; 27034030Sdufault goto yesno; 27134030Sdufault case _SC_PAGESIZE: 27236577Smsmith defaultresult = getpagesize(); 27334925Sdufault mib[0] = CTL_P1003_1B; 27434925Sdufault mib[1] = CTL_P1003_1B_PAGESIZE; 27534030Sdufault goto yesno; 27634030Sdufault case _SC_RTSIG_MAX: 27734925Sdufault mib[0] = CTL_P1003_1B; 27834925Sdufault mib[1] = CTL_P1003_1B_RTSIG_MAX; 27934030Sdufault goto yesno; 28034030Sdufault case _SC_SEM_NSEMS_MAX: 28134925Sdufault mib[0] = CTL_P1003_1B; 28234925Sdufault mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX; 28334030Sdufault goto yesno; 28434030Sdufault case _SC_SEM_VALUE_MAX: 28534925Sdufault mib[0] = CTL_P1003_1B; 28634925Sdufault mib[1] = CTL_P1003_1B_SEM_VALUE_MAX; 28734030Sdufault goto yesno; 28834030Sdufault case _SC_SIGQUEUE_MAX: 28934925Sdufault mib[0] = CTL_P1003_1B; 29034925Sdufault mib[1] = CTL_P1003_1B_SIGQUEUE_MAX; 29134030Sdufault goto yesno; 29234030Sdufault case _SC_TIMER_MAX: 29334925Sdufault mib[0] = CTL_P1003_1B; 29434925Sdufault mib[1] = CTL_P1003_1B_TIMER_MAX; 29534030Sdufault 296103730Swollmanyesno: if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 297103730Swollman return (-1); 298103730Swollman if (value == 0) 299103730Swollman return (defaultresult); 300103730Swollman return (value); 301100142Swollman 302103730Swollman case _SC_2_PBS: 303103730Swollman case _SC_2_PBS_ACCOUNTING: 304103730Swollman case _SC_2_PBS_CHECKPOINT: 305103730Swollman case _SC_2_PBS_LOCATE: 306103730Swollman case _SC_2_PBS_MESSAGE: 307103730Swollman case _SC_2_PBS_TRACK: 308103730Swollman#if _POSIX2_PBS == 0 309103730Swollman#error "don't know how to determine _SC_2_PBS" 310103730Swollman /* 311103730Swollman * This probably requires digging through the filesystem 312103730Swollman * to see if the appropriate package has been installed. 313103730Swollman * Since we don't currently support this option at all, 314103730Swollman * it's not worth the effort to write the code now. 315103730Swollman * Figuring out which of the sub-options are supported 316103730Swollman * would be even more difficult, so it's probably easier 317103730Swollman * to always say ``no''. 318103730Swollman */ 319103730Swollman#else 320103730Swollman return (_POSIX2_PBS); 32187161Sjkoshy#endif 322103730Swollman case _SC_ADVISORY_INFO: 323103730Swollman#if _POSIX_ADVISORY_INFO == 0 324103730Swollman#error "_POSIX_ADVISORY_INFO" 325103730Swollman#else 326103730Swollman return (_POSIX_ADVISORY_INFO); 327103730Swollman#endif 328103730Swollman case _SC_BARRIERS: 329103730Swollman#if _POSIX_BARRIERS == 0 330103730Swollman#error "_POSIX_BARRIERS" 331103730Swollman#else 332103730Swollman return (_POSIX_BARRIERS); 333103730Swollman#endif 334103730Swollman case _SC_CLOCK_SELECTION: 335103730Swollman#if _POSIX_CLOCK_SELECTION == 0 336103730Swollman#error "_POSIX_CLOCK_SELECTION" 337103730Swollman#else 338103730Swollman return (_POSIX_CLOCK_SELECTION); 339103730Swollman#endif 340103730Swollman case _SC_CPUTIME: 341103730Swollman#if _POSIX_CPUTIME == 0 342103730Swollman#error "_POSIX_CPUTIME" 343103730Swollman#else 344103730Swollman return (_POSIX_CPUTIME); 345103730Swollman#endif 346103730Swollman#ifdef notdef 347103730Swollman case _SC_FILE_LOCKING: 348103730Swollman /* 349103730Swollman * XXX - The standard doesn't tell us how to define 350103730Swollman * _POSIX_FILE_LOCKING, so we can't answer this one. 351103730Swollman */ 352103730Swollman#endif 353103730Swollman#if _POSIX_THREAD_SAFE_FUNCTIONS > -1 354103730Swollman case _SC_GETGR_R_SIZE_MAX: 355103730Swollman case _SC_GETPW_R_SIZE_MAX: 356103730Swollman#error "somebody needs to implement this" 357103730Swollman#endif 358103730Swollman case _SC_HOST_NAME_MAX: 359103730Swollman return (MAXHOSTNAMELEN - 1); /* does not include \0 */ 360103730Swollman case _SC_LOGIN_NAME_MAX: 361103730Swollman return (MAXLOGNAME); 362103730Swollman case _SC_MONOTONIC_CLOCK: 363103730Swollman#if _POSIX_MONOTONIC_CLOCK == 0 364103730Swollman#error "_POSIX_MONOTONIC_CLOCK" 365103730Swollman#else 366103730Swollman return (_POSIX_MONOTONIC_CLOCK); 367103730Swollman#endif 368103730Swollman#if _POSIX_MESSAGE_PASSING > -1 369103730Swollman case _SC_MQ_PRIO_MAX: 370103730Swollman return (MQ_PRIO_MAX); 371103730Swollman#endif 372103730Swollman case _SC_READER_WRITER_LOCKS: 373103730Swollman return (_POSIX_READER_WRITER_LOCKS); 374103730Swollman case _SC_REGEXP: 375103730Swollman return (_POSIX_REGEXP); 376103730Swollman case _SC_SHELL: 377103730Swollman return (_POSIX_SHELL); 378103730Swollman case _SC_SPAWN: 379103730Swollman return (_POSIX_SPAWN); 380103730Swollman case _SC_SPIN_LOCKS: 381103730Swollman return (_POSIX_SPIN_LOCKS); 382103730Swollman case _SC_SPORADIC_SERVER: 383103730Swollman#if _POSIX_SPORADIC_SERVER == 0 384103730Swollman#error "_POSIX_SPORADIC_SERVER" 385103730Swollman#else 386103730Swollman return (_POSIX_SPORADIC_SERVER); 387103730Swollman#endif 388103730Swollman case _SC_THREAD_ATTR_STACKADDR: 389103730Swollman return (_POSIX_THREAD_ATTR_STACKADDR); 390103730Swollman case _SC_THREAD_ATTR_STACKSIZE: 391103730Swollman return (_POSIX_THREAD_ATTR_STACKSIZE); 392103730Swollman case _SC_THREAD_CPUTIME: 393103730Swollman return (_POSIX_THREAD_CPUTIME); 394103730Swollman case _SC_THREAD_DESTRUCTOR_ITERATIONS: 395103730Swollman return (PTHREAD_DESTRUCTOR_ITERATIONS); 396103730Swollman case _SC_THREAD_KEYS_MAX: 397103730Swollman return (PTHREAD_KEYS_MAX); 398103730Swollman case _SC_THREAD_PRIO_INHERIT: 399103730Swollman return (_POSIX_THREAD_PRIO_INHERIT); 400103730Swollman case _SC_THREAD_PRIO_PROTECT: 401103730Swollman return (_POSIX_THREAD_PRIO_PROTECT); 402103730Swollman case _SC_THREAD_PRIORITY_SCHEDULING: 403103730Swollman return (_POSIX_THREAD_PRIORITY_SCHEDULING); 404103730Swollman case _SC_THREAD_PROCESS_SHARED: 405103730Swollman return (_POSIX_THREAD_PROCESS_SHARED); 406103730Swollman case _SC_THREAD_SAFE_FUNCTIONS: 407103730Swollman return (_POSIX_THREAD_SAFE_FUNCTIONS); 408103730Swollman case _SC_THREAD_STACK_MIN: 409103730Swollman return (PTHREAD_STACK_MIN); 410103730Swollman case _SC_THREAD_THREADS_MAX: 411103730Swollman return (PTHREAD_THREADS_MAX); /* XXX wrong type! */ 412103730Swollman case _SC_TIMEOUTS: 413103730Swollman return (_POSIX_TIMEOUTS); 414103730Swollman case _SC_THREADS: 415103730Swollman return (_POSIX_THREADS); 416103730Swollman case _SC_TRACE: 417103730Swollman#if _POSIX_TRACE == 0 418103730Swollman#error "_POSIX_TRACE" 419103730Swollman /* While you're implementing this, also do the ones below. */ 420103730Swollman#else 421103730Swollman return (_POSIX_TRACE); 422103730Swollman#endif 423103730Swollman#if _POSIX_TRACE > -1 424103730Swollman case _SC_TRACE_EVENT_FILTER: 425103730Swollman return (_POSIX_TRACE_EVENT_FILTER); 426103730Swollman case _SC_TRACE_INHERIT: 427103730Swollman return (_POSIX_TRACE_INHERIT); 428103730Swollman case _SC_TRACE_LOG: 429103730Swollman return (_POSIX_TRACE_LOG); 430103730Swollman#endif 431103730Swollman case _SC_TTY_NAME_MAX: 432103730Swollman path = _PATH_DEV; 433103730Swollman goto do_NAME_MAX; 434103730Swollman case _SC_TYPED_MEMORY_OBJECTS: 435103730Swollman#if _POSIX_TYPED_MEMORY_OBJECTS == 0 436103730Swollman#error "_POSIX_TYPED_MEMORY_OBJECTS" 437103730Swollman#else 438103730Swollman return (_POSIX_TYPED_MEMORY_OBJECTS); 439103730Swollman#endif 440103730Swollman case _SC_V6_ILP32_OFF32: 441103730Swollman#if _V6_ILP32_OFF32 == 0 442103730Swollman if (sizeof(int) * CHAR_BIT == 32 && 443103730Swollman sizeof(int) == sizeof(long) && 444103730Swollman sizeof(long) == sizeof(void *) && 445103730Swollman sizeof(void *) == sizeof(off_t)) 446103730Swollman return 1; 447103730Swollman else 448103730Swollman return -1; 449103730Swollman#else 450103730Swollman return (_V6_ILP32_OFF32); 451103730Swollman#endif 452103730Swollman case _SC_V6_ILP32_OFFBIG: 453103730Swollman#if _V6_ILP32_OFFBIG == 0 454103730Swollman if (sizeof(int) * CHAR_BIT == 32 && 455103730Swollman sizeof(int) == sizeof(long) && 456103730Swollman sizeof(long) == sizeof(void *) && 457103730Swollman sizeof(off_t) * CHAR_BIT >= 64) 458103730Swollman return 1; 459103730Swollman else 460103730Swollman return -1; 461103730Swollman#else 462103730Swollman return (_V6_ILP32_OFFBIG); 463103730Swollman#endif 464103730Swollman case _SC_V6_LP64_OFF64: 465103730Swollman#if _V6_LP64_OFF64 == 0 466103730Swollman if (sizeof(int) * CHAR_BIT == 32 && 467103730Swollman sizeof(long) * CHAR_BIT == 64 && 468103730Swollman sizeof(long) == sizeof(void *) && 469103730Swollman sizeof(void *) == sizeof(off_t)) 470103730Swollman return 1; 471103730Swollman else 472103730Swollman return -1; 473103730Swollman#else 474103730Swollman return (_V6_LP64_OFF64); 475103730Swollman#endif 476103730Swollman case _SC_V6_LPBIG_OFFBIG: 477103730Swollman#if _V6_LPBIG_OFFBIG == 0 478103730Swollman if (sizeof(int) * CHAR_BIT >= 32 && 479103730Swollman sizeof(long) * CHAR_BIT >= 64 && 480103730Swollman sizeof(void *) * CHAR_BIT >= 64 && 481103730Swollman sizeof(off_t) * CHAR_BIT >= 64) 482103730Swollman return 1; 483103730Swollman else 484103730Swollman return -1; 485103730Swollman#else 486103730Swollman return (_V6_LPBIG_OFFBIG); 487103730Swollman#endif 488103730Swollman case _SC_ATEXIT_MAX: 489103730Swollman return (ATEXIT_SIZE); 49078431Swollman case _SC_IOV_MAX: 49178431Swollman mib[0] = CTL_KERN; 49278431Swollman mib[1] = KERN_IOV_MAX; 49378431Swollman break; 494103730Swollman case _SC_XOPEN_CRYPT: 495103730Swollman return (_XOPEN_CRYPT); 496103730Swollman case _SC_XOPEN_ENH_I18N: 497103730Swollman return (_XOPEN_ENH_I18N); 498103730Swollman case _SC_XOPEN_LEGACY: 499103730Swollman return (_XOPEN_LEGACY); 500103730Swollman case _SC_XOPEN_REALTIME: 501103730Swollman#if _XOPEN_REALTIME == 0 502103730Swollman sverrno = errno; 503103730Swollman value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 && 504103730Swollman sysconf(_SC_MEMLOCK) > 0 && 505103730Swollman sysconf(_SC_MEMLOCK_RANGE) > 0 && 506103730Swollman sysconf(_SC_MESSAGE_PASSING) > 0 && 507103730Swollman sysconf(_SC_PRIORITY_SCHEDULING) > 0 && 508103730Swollman sysconf(_SC_REALTIME_SIGNALS) > 0 && 509103730Swollman sysconf(_SC_SEMAPHORES) > 0 && 510103730Swollman sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 && 511103730Swollman sysconf(_SC_SYNCHRONIZED_IO) > 0 && 512103730Swollman sysconf(_SC_TIMERS) > 0; 513103730Swollman errno = sverrno; 514103730Swollman if (value) 515103730Swollman return (200112L); 516103730Swollman else 517103730Swollman return (-1); 518103730Swollman#else 519103730Swollman return (_XOPEN_REALTIME); 52078431Swollman#endif 521103730Swollman case _SC_XOPEN_REALTIME_THREADS: 522103730Swollman#if _XOPEN_REALTIME_THREADS == 0 523103730Swollman#error "_XOPEN_REALTIME_THREADS" 524103730Swollman#else 525103730Swollman return (_XOPEN_REALTIME_THREADS); 526103730Swollman#endif 527103730Swollman case _SC_XOPEN_SHM: 528103730Swollman sverrno = errno; 529103730Swollman if (sysctlbyname("kern.ipc.shmmin", &value, &len, NULL, 530103730Swollman 0) == -1) { 531103730Swollman errno = sverrno; 532103730Swollman return (-1); 533103730Swollman } 534103730Swollman errno = sverrno; 535103730Swollman return (1); 536103730Swollman case _SC_XOPEN_STREAMS: 537103730Swollman return (_XOPEN_STREAMS); 538103730Swollman case _SC_XOPEN_UNIX: 539103730Swollman return (_XOPEN_UNIX); 540103730Swollman#ifdef _XOPEN_VERSION 541103730Swollman case _SC_XOPEN_VERSION: 542103730Swollman return (_XOPEN_VERSION); 543103730Swollman#endif 544103730Swollman#ifdef _XOPEN_XCU_VERSION 545103730Swollman case _SC_XOPEN_XCU_VERSION: 546103730Swollman return (_XOPEN_XCU_VERSION); 547103730Swollman#endif 54878431Swollman 549103730Swollman case _SC_NPROCESSORS_CONF: 550103730Swollman case _SC_NPROCESSORS_ONLN: 551103730Swollman mib[0] = CTL_HW; 552103730Swollman mib[1] = HW_NCPU; 553103730Swollman break; 554103730Swollman 5551573Srgrimes default: 5561573Srgrimes errno = EINVAL; 5571573Srgrimes return (-1); 5581573Srgrimes } 5598870Srgrimes return (sysctl(mib, 2, &value, &len, NULL, 0) == -1 ? -1 : value); 5601573Srgrimes} 561