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("$FreeBSD$"); 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 721573Srgrimessysconf(name) 731573Srgrimes int name; 741573Srgrimes{ 751573Srgrimes struct rlimit rl; 761573Srgrimes size_t len; 77103730Swollman int mib[2], sverrno, value; 78168718Spjd long lvalue, defaultresult; 79103730Swollman const char *path; 801573Srgrimes 8136577Smsmith defaultresult = -1; 821573Srgrimes 831573Srgrimes switch (name) { 841573Srgrimes case _SC_ARG_MAX: 851573Srgrimes mib[0] = CTL_KERN; 861573Srgrimes mib[1] = KERN_ARGMAX; 871573Srgrimes break; 881573Srgrimes case _SC_CHILD_MAX: 89103730Swollman if (getrlimit(RLIMIT_NPROC, &rl) != 0) 90103730Swollman return (-1); 91103730Swollman if (rl.rlim_cur == RLIM_INFINITY) 92103730Swollman return (-1); 93103730Swollman if (rl.rlim_cur > LONG_MAX) { 94103730Swollman errno = EOVERFLOW; 95103730Swollman return (-1); 96103730Swollman } 97103730Swollman return ((long)rl.rlim_cur); 981573Srgrimes case _SC_CLK_TCK: 991573Srgrimes return (CLK_TCK); 1001573Srgrimes case _SC_NGROUPS_MAX: 1011573Srgrimes mib[0] = CTL_KERN; 1021573Srgrimes mib[1] = KERN_NGROUPS; 1031573Srgrimes break; 1041573Srgrimes case _SC_OPEN_MAX: 105103730Swollman if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 106103730Swollman return (-1); 107103730Swollman if (rl.rlim_cur == RLIM_INFINITY) 108103730Swollman return (-1); 109103730Swollman if (rl.rlim_cur > LONG_MAX) { 110103730Swollman errno = EOVERFLOW; 111103730Swollman return (-1); 112103730Swollman } 113103730Swollman return ((long)rl.rlim_cur); 114176618Swollman case _SC_STREAM_MAX: 115176618Swollman if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 116176618Swollman return (-1); 117176618Swollman if (rl.rlim_cur == RLIM_INFINITY) 118176618Swollman return (-1); 119176618Swollman if (rl.rlim_cur > LONG_MAX) { 120176618Swollman errno = EOVERFLOW; 121176618Swollman return (-1); 122176618Swollman } 123176618Swollman /* 124176618Swollman * struct __sFILE currently has a limitation that 125176618Swollman * file descriptors must fit in a signed short. 126176618Swollman * This doesn't precisely capture the letter of POSIX 127176618Swollman * but approximates the spirit. 128176618Swollman */ 129176618Swollman if (rl.rlim_cur > SHRT_MAX) 130176618Swollman return (SHRT_MAX); 131176618Swollman 132176618Swollman return ((long)rl.rlim_cur); 133103730Swollman case _SC_JOB_CONTROL: 134103730Swollman return (_POSIX_JOB_CONTROL); 1351573Srgrimes case _SC_SAVED_IDS: 136103730Swollman /* XXX - must be 1 */ 1371573Srgrimes mib[0] = CTL_KERN; 1381573Srgrimes mib[1] = KERN_SAVED_IDS; 1391573Srgrimes goto yesno; 1401573Srgrimes case _SC_VERSION: 1411573Srgrimes mib[0] = CTL_KERN; 1421573Srgrimes mib[1] = KERN_POSIX1; 1431573Srgrimes break; 1441573Srgrimes case _SC_BC_BASE_MAX: 145103730Swollman return (BC_BASE_MAX); 1461573Srgrimes case _SC_BC_DIM_MAX: 147103730Swollman return (BC_DIM_MAX); 1481573Srgrimes case _SC_BC_SCALE_MAX: 149103730Swollman return (BC_SCALE_MAX); 1501573Srgrimes case _SC_BC_STRING_MAX: 151103730Swollman return (BC_STRING_MAX); 1521573Srgrimes case _SC_COLL_WEIGHTS_MAX: 153103730Swollman return (COLL_WEIGHTS_MAX); 1541573Srgrimes case _SC_EXPR_NEST_MAX: 155103730Swollman return (EXPR_NEST_MAX); 1561573Srgrimes case _SC_LINE_MAX: 157103730Swollman return (LINE_MAX); 1581573Srgrimes case _SC_RE_DUP_MAX: 159103730Swollman return (RE_DUP_MAX); 1601573Srgrimes case _SC_2_VERSION: 161103730Swollman /* 162103730Swollman * This is something of a lie, but it would be silly at 163103730Swollman * this point to try to deduce this from the contents 164103730Swollman * of the filesystem. 165103730Swollman */ 166103730Swollman return (_POSIX2_VERSION); 1671573Srgrimes case _SC_2_C_BIND: 168103730Swollman return (_POSIX2_C_BIND); 1691573Srgrimes case _SC_2_C_DEV: 170103730Swollman return (_POSIX2_C_DEV); 1711573Srgrimes case _SC_2_CHAR_TERM: 172103730Swollman return (_POSIX2_CHAR_TERM); 1731573Srgrimes case _SC_2_FORT_DEV: 174103730Swollman return (_POSIX2_FORT_DEV); 1751573Srgrimes case _SC_2_FORT_RUN: 176103730Swollman return (_POSIX2_FORT_RUN); 1771573Srgrimes case _SC_2_LOCALEDEF: 178103730Swollman return (_POSIX2_LOCALEDEF); 1791573Srgrimes case _SC_2_SW_DEV: 180103730Swollman return (_POSIX2_SW_DEV); 1811573Srgrimes case _SC_2_UPE: 182103730Swollman return (_POSIX2_UPE); 183103730Swollman case _SC_TZNAME_MAX: 184103730Swollman path = _PATH_ZONEINFO; 185103730Swollmando_NAME_MAX: 186103730Swollman sverrno = errno; 187103730Swollman errno = 0; 188168718Spjd lvalue = pathconf(path, _PC_NAME_MAX); 189168718Spjd if (lvalue == -1 && errno != 0) 190103730Swollman return (-1); 191103730Swollman errno = sverrno; 192168718Spjd return (lvalue); 19334030Sdufault 19434030Sdufault case _SC_ASYNCHRONOUS_IO: 195106055Swollman#if _POSIX_ASYNCHRONOUS_IO == 0 19634925Sdufault mib[0] = CTL_P1003_1B; 19734925Sdufault mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO; 198106055Swollman break; 199106055Swollman#else 200106055Swollman return (_POSIX_ASYNCHRONOUS_IO); 201106055Swollman#endif 20234030Sdufault case _SC_MAPPED_FILES: 203103730Swollman return (_POSIX_MAPPED_FILES); 20434030Sdufault case _SC_MEMLOCK: 205103730Swollman return (_POSIX_MEMLOCK); 20634030Sdufault case _SC_MEMLOCK_RANGE: 207103730Swollman return (_POSIX_MEMLOCK_RANGE); 20834030Sdufault case _SC_MEMORY_PROTECTION: 209103730Swollman return (_POSIX_MEMORY_PROTECTION); 21034030Sdufault case _SC_MESSAGE_PASSING: 211103730Swollman#if _POSIX_MESSAGE_PASSING == 0 21234925Sdufault mib[0] = CTL_P1003_1B; 21334925Sdufault mib[1] = CTL_P1003_1B_MESSAGE_PASSING; 21434030Sdufault goto yesno; 215103730Swollman#else 216103730Swollman return (_POSIX_MESSAGE_PASSING); 217103730Swollman#endif 21834030Sdufault case _SC_PRIORITIZED_IO: 219103730Swollman#if _POSIX_PRIORITIZED_IO == 0 22034925Sdufault mib[0] = CTL_P1003_1B; 22134925Sdufault mib[1] = CTL_P1003_1B_PRIORITIZED_IO; 22234030Sdufault goto yesno; 223103730Swollman#else 224103730Swollman return (_POSIX_PRIORITIZED_IO); 225103730Swollman#endif 22634030Sdufault case _SC_PRIORITY_SCHEDULING: 227103730Swollman#if _POSIX_PRIORITY_SCHEDULING == 0 22834925Sdufault mib[0] = CTL_P1003_1B; 22934925Sdufault mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING; 23034030Sdufault goto yesno; 231103730Swollman#else 232103730Swollman return (_POSIX_PRIORITY_SCHEDULING); 233103730Swollman#endif 23434030Sdufault case _SC_REALTIME_SIGNALS: 235103730Swollman#if _POSIX_REALTIME_SIGNALS == 0 23634925Sdufault mib[0] = CTL_P1003_1B; 23734925Sdufault mib[1] = CTL_P1003_1B_REALTIME_SIGNALS; 23834030Sdufault goto yesno; 239103730Swollman#else 240103730Swollman return (_POSIX_REALTIME_SIGNALS); 241103730Swollman#endif 24234030Sdufault case _SC_SEMAPHORES: 243103730Swollman#if _POSIX_SEMAPHORES == 0 24434925Sdufault mib[0] = CTL_P1003_1B; 24534925Sdufault mib[1] = CTL_P1003_1B_SEMAPHORES; 24634030Sdufault goto yesno; 247103730Swollman#else 248103730Swollman return (_POSIX_SEMAPHORES); 249103730Swollman#endif 250103730Swollman case _SC_FSYNC: 251103730Swollman return (_POSIX_FSYNC); 252103730Swollman 25334030Sdufault case _SC_SHARED_MEMORY_OBJECTS: 254103730Swollman return (_POSIX_SHARED_MEMORY_OBJECTS); 25534030Sdufault case _SC_SYNCHRONIZED_IO: 256103730Swollman#if _POSIX_SYNCHRONIZED_IO == 0 25734925Sdufault mib[0] = CTL_P1003_1B; 25834925Sdufault mib[1] = CTL_P1003_1B_SYNCHRONIZED_IO; 25934030Sdufault goto yesno; 260103730Swollman#else 261103730Swollman return (_POSIX_SYNCHRONIZED_IO); 262103730Swollman#endif 26334030Sdufault case _SC_TIMERS: 264103730Swollman#if _POSIX_TIMERS == 0 26534925Sdufault mib[0] = CTL_P1003_1B; 26634925Sdufault mib[1] = CTL_P1003_1B_TIMERS; 26734030Sdufault goto yesno; 268103730Swollman#else 269103730Swollman return (_POSIX_TIMERS); 270103730Swollman#endif 27134030Sdufault case _SC_AIO_LISTIO_MAX: 27234925Sdufault mib[0] = CTL_P1003_1B; 27334925Sdufault mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX; 274107000Sdougb break; 27534030Sdufault case _SC_AIO_MAX: 27634925Sdufault mib[0] = CTL_P1003_1B; 27734925Sdufault mib[1] = CTL_P1003_1B_AIO_MAX; 278107000Sdougb break; 27934030Sdufault case _SC_AIO_PRIO_DELTA_MAX: 28034925Sdufault mib[0] = CTL_P1003_1B; 28134925Sdufault mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX; 282107000Sdougb break; 28334030Sdufault case _SC_DELAYTIMER_MAX: 28434925Sdufault mib[0] = CTL_P1003_1B; 28534925Sdufault mib[1] = CTL_P1003_1B_DELAYTIMER_MAX; 28634030Sdufault goto yesno; 28734030Sdufault case _SC_MQ_OPEN_MAX: 28834925Sdufault mib[0] = CTL_P1003_1B; 28934925Sdufault mib[1] = CTL_P1003_1B_MQ_OPEN_MAX; 29034030Sdufault goto yesno; 29134030Sdufault case _SC_PAGESIZE: 29236577Smsmith defaultresult = getpagesize(); 29334925Sdufault mib[0] = CTL_P1003_1B; 29434925Sdufault mib[1] = CTL_P1003_1B_PAGESIZE; 29534030Sdufault goto yesno; 29634030Sdufault case _SC_RTSIG_MAX: 29734925Sdufault mib[0] = CTL_P1003_1B; 29834925Sdufault mib[1] = CTL_P1003_1B_RTSIG_MAX; 29934030Sdufault goto yesno; 30034030Sdufault case _SC_SEM_NSEMS_MAX: 30134925Sdufault mib[0] = CTL_P1003_1B; 30234925Sdufault mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX; 30334030Sdufault goto yesno; 30434030Sdufault case _SC_SEM_VALUE_MAX: 30534925Sdufault mib[0] = CTL_P1003_1B; 30634925Sdufault mib[1] = CTL_P1003_1B_SEM_VALUE_MAX; 30734030Sdufault goto yesno; 30834030Sdufault case _SC_SIGQUEUE_MAX: 30934925Sdufault mib[0] = CTL_P1003_1B; 31034925Sdufault mib[1] = CTL_P1003_1B_SIGQUEUE_MAX; 31134030Sdufault goto yesno; 31234030Sdufault case _SC_TIMER_MAX: 31334925Sdufault mib[0] = CTL_P1003_1B; 31434925Sdufault mib[1] = CTL_P1003_1B_TIMER_MAX; 315168718Spjdyesno: 316168718Spjd len = sizeof(value); 317168718Spjd if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 318103730Swollman return (-1); 319103730Swollman if (value == 0) 320103730Swollman return (defaultresult); 321168718Spjd return ((long)value); 322100142Swollman 323103730Swollman case _SC_2_PBS: 324103730Swollman case _SC_2_PBS_ACCOUNTING: 325103730Swollman case _SC_2_PBS_CHECKPOINT: 326103730Swollman case _SC_2_PBS_LOCATE: 327103730Swollman case _SC_2_PBS_MESSAGE: 328103730Swollman case _SC_2_PBS_TRACK: 329103730Swollman#if _POSIX2_PBS == 0 330103730Swollman#error "don't know how to determine _SC_2_PBS" 331103730Swollman /* 332103730Swollman * This probably requires digging through the filesystem 333103730Swollman * to see if the appropriate package has been installed. 334103730Swollman * Since we don't currently support this option at all, 335103730Swollman * it's not worth the effort to write the code now. 336103730Swollman * Figuring out which of the sub-options are supported 337103730Swollman * would be even more difficult, so it's probably easier 338103730Swollman * to always say ``no''. 339103730Swollman */ 340103730Swollman#else 341103730Swollman return (_POSIX2_PBS); 34287161Sjkoshy#endif 343103730Swollman case _SC_ADVISORY_INFO: 344103730Swollman#if _POSIX_ADVISORY_INFO == 0 345103730Swollman#error "_POSIX_ADVISORY_INFO" 346103730Swollman#else 347103730Swollman return (_POSIX_ADVISORY_INFO); 348103730Swollman#endif 349103730Swollman case _SC_BARRIERS: 350103730Swollman#if _POSIX_BARRIERS == 0 351103730Swollman#error "_POSIX_BARRIERS" 352103730Swollman#else 353103730Swollman return (_POSIX_BARRIERS); 354103730Swollman#endif 355103730Swollman case _SC_CLOCK_SELECTION: 356103730Swollman#if _POSIX_CLOCK_SELECTION == 0 357103730Swollman#error "_POSIX_CLOCK_SELECTION" 358103730Swollman#else 359103730Swollman return (_POSIX_CLOCK_SELECTION); 360103730Swollman#endif 361103730Swollman case _SC_CPUTIME: 362103730Swollman return (_POSIX_CPUTIME); 363103730Swollman#ifdef notdef 364103730Swollman case _SC_FILE_LOCKING: 365103730Swollman /* 366103730Swollman * XXX - The standard doesn't tell us how to define 367103730Swollman * _POSIX_FILE_LOCKING, so we can't answer this one. 368103730Swollman */ 369103730Swollman#endif 370268741Skib 371268741Skib /* 372268741Skib * SUSv4tc1 says the following about _SC_GETGR_R_SIZE_MAX and 373268741Skib * _SC_GETPW_R_SIZE_MAX: 374268741Skib * Note that sysconf(_SC_GETGR_R_SIZE_MAX) may return -1 if 375268741Skib * there is no hard limit on the size of the buffer needed to 376268741Skib * store all the groups returned. 377268741Skib */ 378103730Swollman case _SC_GETGR_R_SIZE_MAX: 379103730Swollman case _SC_GETPW_R_SIZE_MAX: 380268741Skib return (-1); 381103730Swollman case _SC_HOST_NAME_MAX: 382103730Swollman return (MAXHOSTNAMELEN - 1); /* does not include \0 */ 383103730Swollman case _SC_LOGIN_NAME_MAX: 384103730Swollman return (MAXLOGNAME); 385103730Swollman case _SC_MONOTONIC_CLOCK: 386103730Swollman#if _POSIX_MONOTONIC_CLOCK == 0 387103730Swollman#error "_POSIX_MONOTONIC_CLOCK" 388103730Swollman#else 389103730Swollman return (_POSIX_MONOTONIC_CLOCK); 390103730Swollman#endif 391103730Swollman#if _POSIX_MESSAGE_PASSING > -1 392103730Swollman case _SC_MQ_PRIO_MAX: 393103730Swollman return (MQ_PRIO_MAX); 394103730Swollman#endif 395103730Swollman case _SC_READER_WRITER_LOCKS: 396103730Swollman return (_POSIX_READER_WRITER_LOCKS); 397103730Swollman case _SC_REGEXP: 398103730Swollman return (_POSIX_REGEXP); 399103730Swollman case _SC_SHELL: 400103730Swollman return (_POSIX_SHELL); 401103730Swollman case _SC_SPAWN: 402103730Swollman return (_POSIX_SPAWN); 403103730Swollman case _SC_SPIN_LOCKS: 404103730Swollman return (_POSIX_SPIN_LOCKS); 405103730Swollman case _SC_SPORADIC_SERVER: 406103730Swollman#if _POSIX_SPORADIC_SERVER == 0 407103730Swollman#error "_POSIX_SPORADIC_SERVER" 408103730Swollman#else 409103730Swollman return (_POSIX_SPORADIC_SERVER); 410103730Swollman#endif 411103730Swollman case _SC_THREAD_ATTR_STACKADDR: 412103730Swollman return (_POSIX_THREAD_ATTR_STACKADDR); 413103730Swollman case _SC_THREAD_ATTR_STACKSIZE: 414103730Swollman return (_POSIX_THREAD_ATTR_STACKSIZE); 415103730Swollman case _SC_THREAD_CPUTIME: 416103730Swollman return (_POSIX_THREAD_CPUTIME); 417103730Swollman case _SC_THREAD_DESTRUCTOR_ITERATIONS: 418103730Swollman return (PTHREAD_DESTRUCTOR_ITERATIONS); 419103730Swollman case _SC_THREAD_KEYS_MAX: 420103730Swollman return (PTHREAD_KEYS_MAX); 421103730Swollman case _SC_THREAD_PRIO_INHERIT: 422103730Swollman return (_POSIX_THREAD_PRIO_INHERIT); 423103730Swollman case _SC_THREAD_PRIO_PROTECT: 424103730Swollman return (_POSIX_THREAD_PRIO_PROTECT); 425103730Swollman case _SC_THREAD_PRIORITY_SCHEDULING: 426103730Swollman return (_POSIX_THREAD_PRIORITY_SCHEDULING); 427103730Swollman case _SC_THREAD_PROCESS_SHARED: 428103730Swollman return (_POSIX_THREAD_PROCESS_SHARED); 429103730Swollman case _SC_THREAD_SAFE_FUNCTIONS: 430103730Swollman return (_POSIX_THREAD_SAFE_FUNCTIONS); 431103730Swollman case _SC_THREAD_STACK_MIN: 432103730Swollman return (PTHREAD_STACK_MIN); 433103730Swollman case _SC_THREAD_THREADS_MAX: 434103730Swollman return (PTHREAD_THREADS_MAX); /* XXX wrong type! */ 435103730Swollman case _SC_TIMEOUTS: 436103730Swollman return (_POSIX_TIMEOUTS); 437103730Swollman case _SC_THREADS: 438103730Swollman return (_POSIX_THREADS); 439103730Swollman case _SC_TRACE: 440103730Swollman#if _POSIX_TRACE == 0 441103730Swollman#error "_POSIX_TRACE" 442103730Swollman /* While you're implementing this, also do the ones below. */ 443103730Swollman#else 444103730Swollman return (_POSIX_TRACE); 445103730Swollman#endif 446103730Swollman#if _POSIX_TRACE > -1 447103730Swollman case _SC_TRACE_EVENT_FILTER: 448103730Swollman return (_POSIX_TRACE_EVENT_FILTER); 449103730Swollman case _SC_TRACE_INHERIT: 450103730Swollman return (_POSIX_TRACE_INHERIT); 451103730Swollman case _SC_TRACE_LOG: 452103730Swollman return (_POSIX_TRACE_LOG); 453103730Swollman#endif 454103730Swollman case _SC_TTY_NAME_MAX: 455103730Swollman path = _PATH_DEV; 456103730Swollman goto do_NAME_MAX; 457103730Swollman case _SC_TYPED_MEMORY_OBJECTS: 458103730Swollman#if _POSIX_TYPED_MEMORY_OBJECTS == 0 459103730Swollman#error "_POSIX_TYPED_MEMORY_OBJECTS" 460103730Swollman#else 461103730Swollman return (_POSIX_TYPED_MEMORY_OBJECTS); 462103730Swollman#endif 463103730Swollman case _SC_V6_ILP32_OFF32: 464103730Swollman#if _V6_ILP32_OFF32 == 0 465103730Swollman if (sizeof(int) * CHAR_BIT == 32 && 466103730Swollman sizeof(int) == sizeof(long) && 467103730Swollman sizeof(long) == sizeof(void *) && 468103730Swollman sizeof(void *) == sizeof(off_t)) 469103730Swollman return 1; 470103730Swollman else 471103730Swollman return -1; 472103730Swollman#else 473103730Swollman return (_V6_ILP32_OFF32); 474103730Swollman#endif 475103730Swollman case _SC_V6_ILP32_OFFBIG: 476103730Swollman#if _V6_ILP32_OFFBIG == 0 477103730Swollman if (sizeof(int) * CHAR_BIT == 32 && 478103730Swollman sizeof(int) == sizeof(long) && 479103730Swollman sizeof(long) == sizeof(void *) && 480103730Swollman sizeof(off_t) * CHAR_BIT >= 64) 481103730Swollman return 1; 482103730Swollman else 483103730Swollman return -1; 484103730Swollman#else 485103730Swollman return (_V6_ILP32_OFFBIG); 486103730Swollman#endif 487103730Swollman case _SC_V6_LP64_OFF64: 488103730Swollman#if _V6_LP64_OFF64 == 0 489103730Swollman if (sizeof(int) * CHAR_BIT == 32 && 490103730Swollman sizeof(long) * CHAR_BIT == 64 && 491103730Swollman sizeof(long) == sizeof(void *) && 492103730Swollman sizeof(void *) == sizeof(off_t)) 493103730Swollman return 1; 494103730Swollman else 495103730Swollman return -1; 496103730Swollman#else 497103730Swollman return (_V6_LP64_OFF64); 498103730Swollman#endif 499103730Swollman case _SC_V6_LPBIG_OFFBIG: 500103730Swollman#if _V6_LPBIG_OFFBIG == 0 501103730Swollman if (sizeof(int) * CHAR_BIT >= 32 && 502103730Swollman sizeof(long) * CHAR_BIT >= 64 && 503103730Swollman sizeof(void *) * CHAR_BIT >= 64 && 504103730Swollman sizeof(off_t) * CHAR_BIT >= 64) 505103730Swollman return 1; 506103730Swollman else 507103730Swollman return -1; 508103730Swollman#else 509103730Swollman return (_V6_LPBIG_OFFBIG); 510103730Swollman#endif 511103730Swollman case _SC_ATEXIT_MAX: 512103730Swollman return (ATEXIT_SIZE); 51378431Swollman case _SC_IOV_MAX: 51478431Swollman mib[0] = CTL_KERN; 51578431Swollman mib[1] = KERN_IOV_MAX; 51678431Swollman break; 517103730Swollman case _SC_XOPEN_CRYPT: 518103730Swollman return (_XOPEN_CRYPT); 519103730Swollman case _SC_XOPEN_ENH_I18N: 520103730Swollman return (_XOPEN_ENH_I18N); 521103730Swollman case _SC_XOPEN_LEGACY: 522103730Swollman return (_XOPEN_LEGACY); 523103730Swollman case _SC_XOPEN_REALTIME: 524103730Swollman#if _XOPEN_REALTIME == 0 525103730Swollman sverrno = errno; 526103730Swollman value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 && 527103730Swollman sysconf(_SC_MEMLOCK) > 0 && 528103730Swollman sysconf(_SC_MEMLOCK_RANGE) > 0 && 529103730Swollman sysconf(_SC_MESSAGE_PASSING) > 0 && 530103730Swollman sysconf(_SC_PRIORITY_SCHEDULING) > 0 && 531103730Swollman sysconf(_SC_REALTIME_SIGNALS) > 0 && 532103730Swollman sysconf(_SC_SEMAPHORES) > 0 && 533103730Swollman sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 && 534103730Swollman sysconf(_SC_SYNCHRONIZED_IO) > 0 && 535103730Swollman sysconf(_SC_TIMERS) > 0; 536103730Swollman errno = sverrno; 537103730Swollman if (value) 538103730Swollman return (200112L); 539103730Swollman else 540103730Swollman return (-1); 541103730Swollman#else 542103730Swollman return (_XOPEN_REALTIME); 54378431Swollman#endif 544103730Swollman case _SC_XOPEN_REALTIME_THREADS: 545103730Swollman#if _XOPEN_REALTIME_THREADS == 0 546103730Swollman#error "_XOPEN_REALTIME_THREADS" 547103730Swollman#else 548103730Swollman return (_XOPEN_REALTIME_THREADS); 549103730Swollman#endif 550103730Swollman case _SC_XOPEN_SHM: 551168718Spjd len = sizeof(lvalue); 552103730Swollman sverrno = errno; 553168718Spjd if (sysctlbyname("kern.ipc.shmmin", &lvalue, &len, NULL, 554103730Swollman 0) == -1) { 555103730Swollman errno = sverrno; 556103730Swollman return (-1); 557103730Swollman } 558103730Swollman errno = sverrno; 559103730Swollman return (1); 560103730Swollman case _SC_XOPEN_STREAMS: 561103730Swollman return (_XOPEN_STREAMS); 562103730Swollman case _SC_XOPEN_UNIX: 563103730Swollman return (_XOPEN_UNIX); 564103730Swollman#ifdef _XOPEN_VERSION 565103730Swollman case _SC_XOPEN_VERSION: 566103730Swollman return (_XOPEN_VERSION); 567103730Swollman#endif 568103730Swollman#ifdef _XOPEN_XCU_VERSION 569103730Swollman case _SC_XOPEN_XCU_VERSION: 570103730Swollman return (_XOPEN_XCU_VERSION); 571103730Swollman#endif 572106055Swollman case _SC_SYMLOOP_MAX: 573106055Swollman return (MAXSYMLINKS); 574106055Swollman case _SC_RAW_SOCKETS: 575106055Swollman return (_POSIX_RAW_SOCKETS); 576106055Swollman case _SC_IPV6: 577106055Swollman#if _POSIX_IPV6 == 0 578106055Swollman sverrno = errno; 579106055Swollman value = socket(PF_INET6, SOCK_DGRAM, 0); 580106055Swollman errno = sverrno; 581106055Swollman if (value >= 0) { 582106055Swollman close(value); 583106055Swollman return (200112L); 584106055Swollman } else 585106055Swollman return (0); 586106055Swollman#else 587106055Swollman return (_POSIX_IPV6); 588106055Swollman#endif 58978431Swollman 590103730Swollman case _SC_NPROCESSORS_CONF: 591103730Swollman case _SC_NPROCESSORS_ONLN: 592237660Skib if (_elf_aux_info(AT_NCPUS, &value, sizeof(value)) == 0) 593237660Skib return ((long)value); 594103730Swollman mib[0] = CTL_HW; 595103730Swollman mib[1] = HW_NCPU; 596103730Swollman break; 597103730Swollman 598165232Simp#ifdef _SC_PHYS_PAGES 599165212Spjd case _SC_PHYS_PAGES: 600168718Spjd len = sizeof(lvalue); 601168718Spjd if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1) 602168718Spjd return (-1); 603168718Spjd return (lvalue); 604165232Simp#endif 605165212Spjd 606214510Sdavidxu#ifdef _SC_CPUSET_SIZE 607214510Sdavidxu case _SC_CPUSET_SIZE: 608223136Sdavidxu len = sizeof(value); 609223136Sdavidxu if (sysctlbyname("kern.sched.cpusetsize", &value, &len, NULL, 610214510Sdavidxu 0) == -1) 611214510Sdavidxu return (-1); 612223136Sdavidxu return ((long)value); 613214510Sdavidxu#endif 614214510Sdavidxu 6151573Srgrimes default: 6161573Srgrimes errno = EINVAL; 6171573Srgrimes return (-1); 6181573Srgrimes } 619168718Spjd len = sizeof(value); 620168718Spjd if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 621168718Spjd value = -1; 622168718Spjd return ((long)value); 6231573Srgrimes} 624