xref: /minix3/lib/libc/gen/sysconf.c (revision d2532d3d42d764c9ef9816851cdb17eda7e08d36)
10a6a1f1dSLionel Sambuc /*	$NetBSD: sysconf.c,v 1.36 2013/12/19 19:11:50 rmind Exp $	*/
22fe8fb19SBen Gras 
32fe8fb19SBen Gras /*-
42fe8fb19SBen Gras  * Copyright (c) 1993
52fe8fb19SBen Gras  *	The Regents of the University of California.  All rights reserved.
62fe8fb19SBen Gras  *
72fe8fb19SBen Gras  * This code is derived from software contributed to Berkeley by
82fe8fb19SBen Gras  * Sean Eric Fagan of Cygnus Support.
92fe8fb19SBen Gras  *
102fe8fb19SBen Gras  * Redistribution and use in source and binary forms, with or without
112fe8fb19SBen Gras  * modification, are permitted provided that the following conditions
122fe8fb19SBen Gras  * are met:
132fe8fb19SBen Gras  * 1. Redistributions of source code must retain the above copyright
142fe8fb19SBen Gras  *    notice, this list of conditions and the following disclaimer.
152fe8fb19SBen Gras  * 2. Redistributions in binary form must reproduce the above copyright
162fe8fb19SBen Gras  *    notice, this list of conditions and the following disclaimer in the
172fe8fb19SBen Gras  *    documentation and/or other materials provided with the distribution.
182fe8fb19SBen Gras  * 3. Neither the name of the University nor the names of its contributors
192fe8fb19SBen Gras  *    may be used to endorse or promote products derived from this software
202fe8fb19SBen Gras  *    without specific prior written permission.
212fe8fb19SBen Gras  *
222fe8fb19SBen Gras  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
232fe8fb19SBen Gras  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
242fe8fb19SBen Gras  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
252fe8fb19SBen Gras  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
262fe8fb19SBen Gras  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
272fe8fb19SBen Gras  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
282fe8fb19SBen Gras  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
292fe8fb19SBen Gras  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
302fe8fb19SBen Gras  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
312fe8fb19SBen Gras  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
322fe8fb19SBen Gras  * SUCH DAMAGE.
332fe8fb19SBen Gras  */
342fe8fb19SBen Gras 
352fe8fb19SBen Gras #include <sys/cdefs.h>
362fe8fb19SBen Gras #if defined(LIBC_SCCS) && !defined(lint)
372fe8fb19SBen Gras #if 0
382fe8fb19SBen Gras static char sccsid[] = "@(#)sysconf.c	8.2 (Berkeley) 3/20/94";
392fe8fb19SBen Gras #else
400a6a1f1dSLionel Sambuc __RCSID("$NetBSD: sysconf.c,v 1.36 2013/12/19 19:11:50 rmind Exp $");
412fe8fb19SBen Gras #endif
422fe8fb19SBen Gras #endif /* LIBC_SCCS and not lint */
432fe8fb19SBen Gras 
442fe8fb19SBen Gras #include "namespace.h"
452fe8fb19SBen Gras #include <sys/param.h>
462fe8fb19SBen Gras #include <sys/sysctl.h>
472fe8fb19SBen Gras #include <sys/time.h>
482fe8fb19SBen Gras #include <sys/resource.h>
492fe8fb19SBen Gras 
502fe8fb19SBen Gras #include <errno.h>
512fe8fb19SBen Gras #include <limits.h>
522fe8fb19SBen Gras #include <time.h>
532fe8fb19SBen Gras #include <unistd.h>
542fe8fb19SBen Gras #include <paths.h>
552fe8fb19SBen Gras #include <pwd.h>
562fe8fb19SBen Gras 
572fe8fb19SBen Gras #ifdef __weak_alias
__weak_alias(sysconf,__sysconf)582fe8fb19SBen Gras __weak_alias(sysconf,__sysconf)
592fe8fb19SBen Gras #endif
602fe8fb19SBen Gras 
612fe8fb19SBen Gras /*
622fe8fb19SBen Gras  * sysconf --
632fe8fb19SBen Gras  *	get configurable system variables.
642fe8fb19SBen Gras  *
652fe8fb19SBen Gras  * XXX
662fe8fb19SBen Gras  * POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values
672fe8fb19SBen Gras  * not change during the lifetime of the calling process.  This would seem
682fe8fb19SBen Gras  * to require that any change to system limits kill all running processes.
692fe8fb19SBen Gras  * A workaround might be to cache the values when they are first retrieved
702fe8fb19SBen Gras  * and then simply return the cached value on subsequent calls.  This is
712fe8fb19SBen Gras  * less useful than returning up-to-date values, however.
722fe8fb19SBen Gras  */
732fe8fb19SBen Gras long
742fe8fb19SBen Gras sysconf(int name)
752fe8fb19SBen Gras {
762fe8fb19SBen Gras 	struct rlimit rl;
772fe8fb19SBen Gras 	size_t len;
7884d9c625SLionel Sambuc 	uint64_t mem;
792fe8fb19SBen Gras 	int mib[CTL_MAXNAME], value;
802fe8fb19SBen Gras 	unsigned int mib_len;
812fe8fb19SBen Gras 	struct clockinfo tmpclock;
822fe8fb19SBen Gras 	static int clk_tck;
832fe8fb19SBen Gras 
842fe8fb19SBen Gras 	len = sizeof(value);
852fe8fb19SBen Gras 
862fe8fb19SBen Gras 	/* Default length of the MIB */
872fe8fb19SBen Gras 	mib_len = 2;
882fe8fb19SBen Gras 
892fe8fb19SBen Gras 	switch (name) {
902fe8fb19SBen Gras 
912fe8fb19SBen Gras /* 1003.1 */
922fe8fb19SBen Gras 	case _SC_ARG_MAX:
932fe8fb19SBen Gras 		mib[0] = CTL_KERN;
942fe8fb19SBen Gras 		mib[1] = KERN_ARGMAX;
952fe8fb19SBen Gras 		break;
962fe8fb19SBen Gras 	case _SC_CHILD_MAX:
972fe8fb19SBen Gras 		return (getrlimit(RLIMIT_NPROC, &rl) ? -1 : (long)rl.rlim_cur);
982fe8fb19SBen Gras 	case _O_SC_CLK_TCK:
992fe8fb19SBen Gras 		/*
1002fe8fb19SBen Gras 		 * For applications compiled when CLK_TCK was a compile-time
1012fe8fb19SBen Gras 		 * constant.
1022fe8fb19SBen Gras 		 */
1032fe8fb19SBen Gras 		return 100;
1042fe8fb19SBen Gras 	case _SC_CLK_TCK:
1052fe8fb19SBen Gras 		/*
1062fe8fb19SBen Gras 		 * Has to be handled specially because it returns a
1072fe8fb19SBen Gras 		 * struct clockinfo instead of an integer. Also, since
1082fe8fb19SBen Gras 		 * this might be called often by some things that
1092fe8fb19SBen Gras 		 * don't grok CLK_TCK can be a macro expanding to a
1102fe8fb19SBen Gras 		 * function, cache the value.
1112fe8fb19SBen Gras 		 */
1122fe8fb19SBen Gras 		if (clk_tck == 0) {
1132fe8fb19SBen Gras 			mib[0] = CTL_KERN;
1142fe8fb19SBen Gras 			mib[1] = KERN_CLOCKRATE;
1152fe8fb19SBen Gras 			len = sizeof(struct clockinfo);
1162fe8fb19SBen Gras 			clk_tck = sysctl(mib, 2, &tmpclock, &len, NULL, 0)
1172fe8fb19SBen Gras 			    == -1 ? -1 : tmpclock.hz;
1182fe8fb19SBen Gras 		}
1192fe8fb19SBen Gras 		return(clk_tck);
1202fe8fb19SBen Gras 	case _SC_JOB_CONTROL:
1212fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1222fe8fb19SBen Gras 		mib[1] = KERN_JOB_CONTROL;
1232fe8fb19SBen Gras 		goto yesno;
1242fe8fb19SBen Gras 	case _SC_NGROUPS_MAX:
1252fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1262fe8fb19SBen Gras 		mib[1] = KERN_NGROUPS;
1272fe8fb19SBen Gras 		break;
1282fe8fb19SBen Gras 	case _SC_OPEN_MAX:
1292fe8fb19SBen Gras 		return (getrlimit(RLIMIT_NOFILE, &rl) ? -1 : (long)rl.rlim_cur);
1302fe8fb19SBen Gras 	case _SC_STREAM_MAX:
1312fe8fb19SBen Gras 		mib[0] = CTL_USER;
1322fe8fb19SBen Gras 		mib[1] = USER_STREAM_MAX;
1332fe8fb19SBen Gras 		break;
1342fe8fb19SBen Gras 	case _SC_TZNAME_MAX:
1352fe8fb19SBen Gras 		mib[0] = CTL_USER;
1362fe8fb19SBen Gras 		mib[1] = USER_TZNAME_MAX;
1372fe8fb19SBen Gras 		break;
1382fe8fb19SBen Gras 	case _SC_SAVED_IDS:
1392fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1402fe8fb19SBen Gras 		mib[1] = KERN_SAVED_IDS;
1412fe8fb19SBen Gras 		goto yesno;
1422fe8fb19SBen Gras 	case _SC_VERSION:
1432fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1442fe8fb19SBen Gras 		mib[1] = KERN_POSIX1;
1452fe8fb19SBen Gras 		break;
1462fe8fb19SBen Gras 
1472fe8fb19SBen Gras /* 1003.1b */
1482fe8fb19SBen Gras 	case _SC_PAGESIZE:
1492fe8fb19SBen Gras 		return _getpagesize();
1502fe8fb19SBen Gras 	case _SC_FSYNC:
1512fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1522fe8fb19SBen Gras 		mib[1] = KERN_FSYNC;
1532fe8fb19SBen Gras 		goto yesno;
1542fe8fb19SBen Gras 	case _SC_SYNCHRONIZED_IO:
1552fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1562fe8fb19SBen Gras 		mib[1] = KERN_SYNCHRONIZED_IO;
1572fe8fb19SBen Gras 		goto yesno;
1582fe8fb19SBen Gras 	case _SC_MAPPED_FILES:
1592fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1602fe8fb19SBen Gras 		mib[1] = KERN_MAPPED_FILES;
1612fe8fb19SBen Gras 		goto yesno;
1622fe8fb19SBen Gras 	case _SC_MEMLOCK:
1632fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1642fe8fb19SBen Gras 		mib[1] = KERN_MEMLOCK;
1652fe8fb19SBen Gras 		goto yesno;
1662fe8fb19SBen Gras 	case _SC_MEMLOCK_RANGE:
1672fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1682fe8fb19SBen Gras 		mib[1] = KERN_MEMLOCK_RANGE;
1692fe8fb19SBen Gras 		goto yesno;
1702fe8fb19SBen Gras 	case _SC_MEMORY_PROTECTION:
1712fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1722fe8fb19SBen Gras 		mib[1] = KERN_MEMORY_PROTECTION;
1732fe8fb19SBen Gras 		goto yesno;
1742fe8fb19SBen Gras 	case _SC_MONOTONIC_CLOCK:
1752fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1762fe8fb19SBen Gras 		mib[1] = KERN_MONOTONIC_CLOCK;
1772fe8fb19SBen Gras 		goto yesno;
1782fe8fb19SBen Gras 	case _SC_SEMAPHORES:
1792fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1802fe8fb19SBen Gras 		mib[1] = KERN_POSIX_SEMAPHORES;
1812fe8fb19SBen Gras 		goto yesno;
1822fe8fb19SBen Gras 	case _SC_TIMERS:
1832fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1842fe8fb19SBen Gras 		mib[1] = KERN_POSIX_TIMERS;
1852fe8fb19SBen Gras 		goto yesno;
1862fe8fb19SBen Gras 
1872fe8fb19SBen Gras /* 1003.1c */
1882fe8fb19SBen Gras 	case _SC_LOGIN_NAME_MAX:
1892fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1902fe8fb19SBen Gras 		mib[1] = KERN_LOGIN_NAME_MAX;
1912fe8fb19SBen Gras 		break;
1922fe8fb19SBen Gras 	case _SC_THREADS:
1932fe8fb19SBen Gras 		mib[0] = CTL_KERN;
1942fe8fb19SBen Gras 		mib[1] = KERN_POSIX_THREADS;
1952fe8fb19SBen Gras 		goto yesno;
1962fe8fb19SBen Gras 
1972fe8fb19SBen Gras /* 1003.1j */
1982fe8fb19SBen Gras 	case _SC_BARRIERS:
1992fe8fb19SBen Gras 		mib[0] = CTL_KERN;
2002fe8fb19SBen Gras 		mib[1] = KERN_POSIX_BARRIERS;
2012fe8fb19SBen Gras 		goto yesno;
2022fe8fb19SBen Gras 	case _SC_SPIN_LOCKS:
2032fe8fb19SBen Gras 		mib[0] = CTL_KERN;
2042fe8fb19SBen Gras 		mib[1] = KERN_POSIX_SPIN_LOCKS;
2052fe8fb19SBen Gras 		goto yesno;
2062fe8fb19SBen Gras 	/* Historical; Threads option in 1003.1-2001 */
2072fe8fb19SBen Gras 	case _SC_READER_WRITER_LOCKS:
2082fe8fb19SBen Gras 		mib[0] = CTL_KERN;
2092fe8fb19SBen Gras 		mib[1] = KERN_POSIX_READER_WRITER_LOCKS;
2102fe8fb19SBen Gras 		goto yesno;
2112fe8fb19SBen Gras 
2122fe8fb19SBen Gras /* 1003.2 */
2132fe8fb19SBen Gras 	case _SC_BC_BASE_MAX:
2142fe8fb19SBen Gras 		mib[0] = CTL_USER;
2152fe8fb19SBen Gras 		mib[1] = USER_BC_BASE_MAX;
2162fe8fb19SBen Gras 		break;
2172fe8fb19SBen Gras 	case _SC_BC_DIM_MAX:
2182fe8fb19SBen Gras 		mib[0] = CTL_USER;
2192fe8fb19SBen Gras 		mib[1] = USER_BC_DIM_MAX;
2202fe8fb19SBen Gras 		break;
2212fe8fb19SBen Gras 	case _SC_BC_SCALE_MAX:
2222fe8fb19SBen Gras 		mib[0] = CTL_USER;
2232fe8fb19SBen Gras 		mib[1] = USER_BC_SCALE_MAX;
2242fe8fb19SBen Gras 		break;
2252fe8fb19SBen Gras 	case _SC_BC_STRING_MAX:
2262fe8fb19SBen Gras 		mib[0] = CTL_USER;
2272fe8fb19SBen Gras 		mib[1] = USER_BC_STRING_MAX;
2282fe8fb19SBen Gras 		break;
2292fe8fb19SBen Gras 	case _SC_COLL_WEIGHTS_MAX:
2302fe8fb19SBen Gras 		mib[0] = CTL_USER;
2312fe8fb19SBen Gras 		mib[1] = USER_COLL_WEIGHTS_MAX;
2322fe8fb19SBen Gras 		break;
2332fe8fb19SBen Gras 	case _SC_EXPR_NEST_MAX:
2342fe8fb19SBen Gras 		mib[0] = CTL_USER;
2352fe8fb19SBen Gras 		mib[1] = USER_EXPR_NEST_MAX;
2362fe8fb19SBen Gras 		break;
2372fe8fb19SBen Gras 	case _SC_LINE_MAX:
2382fe8fb19SBen Gras 		mib[0] = CTL_USER;
2392fe8fb19SBen Gras 		mib[1] = USER_LINE_MAX;
2402fe8fb19SBen Gras 		break;
2412fe8fb19SBen Gras 	case _SC_RE_DUP_MAX:
2422fe8fb19SBen Gras 		mib[0] = CTL_USER;
2432fe8fb19SBen Gras 		mib[1] = USER_RE_DUP_MAX;
2442fe8fb19SBen Gras 		break;
2452fe8fb19SBen Gras 	case _SC_2_VERSION:
2462fe8fb19SBen Gras 		mib[0] = CTL_USER;
2472fe8fb19SBen Gras 		mib[1] = USER_POSIX2_VERSION;
2482fe8fb19SBen Gras 		break;
2492fe8fb19SBen Gras 	case _SC_2_C_BIND:
2502fe8fb19SBen Gras 		mib[0] = CTL_USER;
2512fe8fb19SBen Gras 		mib[1] = USER_POSIX2_C_BIND;
2522fe8fb19SBen Gras 		goto yesno;
2532fe8fb19SBen Gras 	case _SC_2_C_DEV:
2542fe8fb19SBen Gras 		mib[0] = CTL_USER;
2552fe8fb19SBen Gras 		mib[1] = USER_POSIX2_C_DEV;
2562fe8fb19SBen Gras 		goto yesno;
2572fe8fb19SBen Gras 	case _SC_2_CHAR_TERM:
2582fe8fb19SBen Gras 		mib[0] = CTL_USER;
2592fe8fb19SBen Gras 		mib[1] = USER_POSIX2_CHAR_TERM;
2602fe8fb19SBen Gras 		goto yesno;
2612fe8fb19SBen Gras 	case _SC_2_FORT_DEV:
2622fe8fb19SBen Gras 		mib[0] = CTL_USER;
2632fe8fb19SBen Gras 		mib[1] = USER_POSIX2_FORT_DEV;
2642fe8fb19SBen Gras 		goto yesno;
2652fe8fb19SBen Gras 	case _SC_2_FORT_RUN:
2662fe8fb19SBen Gras 		mib[0] = CTL_USER;
2672fe8fb19SBen Gras 		mib[1] = USER_POSIX2_FORT_RUN;
2682fe8fb19SBen Gras 		goto yesno;
2692fe8fb19SBen Gras 	case _SC_2_LOCALEDEF:
2702fe8fb19SBen Gras 		mib[0] = CTL_USER;
2712fe8fb19SBen Gras 		mib[1] = USER_POSIX2_LOCALEDEF;
2722fe8fb19SBen Gras 		goto yesno;
2732fe8fb19SBen Gras 	case _SC_2_SW_DEV:
2742fe8fb19SBen Gras 		mib[0] = CTL_USER;
2752fe8fb19SBen Gras 		mib[1] = USER_POSIX2_SW_DEV;
2762fe8fb19SBen Gras 		goto yesno;
2772fe8fb19SBen Gras 	case _SC_2_UPE:
2782fe8fb19SBen Gras 		mib[0] = CTL_USER;
2792fe8fb19SBen Gras 		mib[1] = USER_POSIX2_UPE;
2802fe8fb19SBen Gras 		goto yesno;
2812fe8fb19SBen Gras 
2822fe8fb19SBen Gras /* XPG 4.2 */
2832fe8fb19SBen Gras 	case _SC_IOV_MAX:
2842fe8fb19SBen Gras 		mib[0] = CTL_KERN;
2852fe8fb19SBen Gras 		mib[1] = KERN_IOV_MAX;
2862fe8fb19SBen Gras 		break;
2872fe8fb19SBen Gras 	case _SC_XOPEN_SHM:
2882fe8fb19SBen Gras 		mib[0] = CTL_KERN;
2892fe8fb19SBen Gras 		mib[1] = KERN_SYSVIPC;
2902fe8fb19SBen Gras 		mib[2] = KERN_SYSVIPC_SHM;
2912fe8fb19SBen Gras 		mib_len = 3;
2922fe8fb19SBen Gras 		goto yesno;
2932fe8fb19SBen Gras 
2942fe8fb19SBen Gras /* 1003.1-2001, XSI Option Group */
2952fe8fb19SBen Gras 	case _SC_AIO_LISTIO_MAX:
2962fe8fb19SBen Gras 		if (sysctlgetmibinfo("kern.aio_listio_max", &mib[0], &mib_len,
2972fe8fb19SBen Gras 		    NULL, NULL, NULL, SYSCTL_VERSION))
2982fe8fb19SBen Gras 			return -1;
2992fe8fb19SBen Gras 		break;
3002fe8fb19SBen Gras 	case _SC_AIO_MAX:
3012fe8fb19SBen Gras 		if (sysctlgetmibinfo("kern.aio_max", &mib[0], &mib_len,
3022fe8fb19SBen Gras 		    NULL, NULL, NULL, SYSCTL_VERSION))
3032fe8fb19SBen Gras 			return -1;
3042fe8fb19SBen Gras 		break;
3052fe8fb19SBen Gras 	case _SC_ASYNCHRONOUS_IO:
3062fe8fb19SBen Gras 		if (sysctlgetmibinfo("kern.posix_aio", &mib[0], &mib_len,
3072fe8fb19SBen Gras 		    NULL, NULL, NULL, SYSCTL_VERSION))
3082fe8fb19SBen Gras 			return -1;
3092fe8fb19SBen Gras 		goto yesno;
3102fe8fb19SBen Gras 	case _SC_MESSAGE_PASSING:
3112fe8fb19SBen Gras 		if (sysctlgetmibinfo("kern.posix_msg", &mib[0], &mib_len,
3122fe8fb19SBen Gras 		    NULL, NULL, NULL, SYSCTL_VERSION))
3132fe8fb19SBen Gras 			return -1;
3142fe8fb19SBen Gras 		goto yesno;
3152fe8fb19SBen Gras 	case _SC_MQ_OPEN_MAX:
3162fe8fb19SBen Gras 		if (sysctlgetmibinfo("kern.mqueue.mq_open_max", &mib[0],
3172fe8fb19SBen Gras 		    &mib_len, NULL, NULL, NULL, SYSCTL_VERSION))
3182fe8fb19SBen Gras 			return -1;
3192fe8fb19SBen Gras 		break;
3202fe8fb19SBen Gras 	case _SC_MQ_PRIO_MAX:
3212fe8fb19SBen Gras 		if (sysctlgetmibinfo("kern.mqueue.mq_prio_max", &mib[0],
3222fe8fb19SBen Gras 		    &mib_len, NULL, NULL, NULL, SYSCTL_VERSION))
3232fe8fb19SBen Gras 			return -1;
3242fe8fb19SBen Gras 		break;
3252fe8fb19SBen Gras 	case _SC_PRIORITY_SCHEDULING:
3262fe8fb19SBen Gras 		if (sysctlgetmibinfo("kern.posix_sched", &mib[0], &mib_len,
3272fe8fb19SBen Gras 		    NULL, NULL, NULL, SYSCTL_VERSION))
3282fe8fb19SBen Gras 			return -1;
3292fe8fb19SBen Gras 		goto yesno;
3302fe8fb19SBen Gras 	case _SC_ATEXIT_MAX:
3312fe8fb19SBen Gras 		mib[0] = CTL_USER;
3322fe8fb19SBen Gras 		mib[1] = USER_ATEXIT_MAX;
3332fe8fb19SBen Gras 		break;
3342fe8fb19SBen Gras 
3352fe8fb19SBen Gras /* 1003.1-2001, TSF */
3362fe8fb19SBen Gras 	case _SC_GETGR_R_SIZE_MAX:
3372fe8fb19SBen Gras 		return _GETGR_R_SIZE_MAX;
3382fe8fb19SBen Gras 	case _SC_GETPW_R_SIZE_MAX:
3392fe8fb19SBen Gras 		return _GETPW_R_SIZE_MAX;
3402fe8fb19SBen Gras 
3412fe8fb19SBen Gras /* Unsorted */
3422fe8fb19SBen Gras 	case _SC_HOST_NAME_MAX:
3432fe8fb19SBen Gras 		return MAXHOSTNAMELEN;
3442fe8fb19SBen Gras 	case _SC_PASS_MAX:
3452fe8fb19SBen Gras 		return _PASSWORD_LEN;
3462fe8fb19SBen Gras 	case _SC_REGEXP:
3472fe8fb19SBen Gras 		return _POSIX_REGEXP;
3480a6a1f1dSLionel Sambuc 	case _SC_SHARED_MEMORY_OBJECTS:
3490a6a1f1dSLionel Sambuc 		return _POSIX_SHARED_MEMORY_OBJECTS;
3502fe8fb19SBen Gras 	case _SC_SHELL:
3512fe8fb19SBen Gras 		return _POSIX_SHELL;
352*d2532d3dSDavid van Moolenbroek #ifndef __minix
353f14fb602SLionel Sambuc 	case _SC_SPAWN:
354f14fb602SLionel Sambuc 		return _POSIX_SPAWN;
355*d2532d3dSDavid van Moolenbroek #endif /* !__minix */
3562fe8fb19SBen Gras 	case _SC_SYMLOOP_MAX:
3572fe8fb19SBen Gras 		return MAXSYMLINKS;
3582fe8fb19SBen Gras 
3592fe8fb19SBen Gras yesno:		if (sysctl(mib, mib_len, &value, &len, NULL, 0) == -1)
3602fe8fb19SBen Gras 			return (-1);
3612fe8fb19SBen Gras 		if (value == 0)
3622fe8fb19SBen Gras 			return (-1);
3632fe8fb19SBen Gras 		return (value);
3642fe8fb19SBen Gras 
3652fe8fb19SBen Gras /* Extensions */
3662fe8fb19SBen Gras 	case _SC_NPROCESSORS_CONF:
3672fe8fb19SBen Gras 		mib[0] = CTL_HW;
3682fe8fb19SBen Gras 		mib[1] = HW_NCPU;
3692fe8fb19SBen Gras 		break;
3702fe8fb19SBen Gras 	case _SC_NPROCESSORS_ONLN:
3712fe8fb19SBen Gras 		mib[0] = CTL_HW;
3722fe8fb19SBen Gras 		mib[1] = HW_NCPUONLINE;
3732fe8fb19SBen Gras 		break;
3742fe8fb19SBen Gras 
37584d9c625SLionel Sambuc /* Linux/Solaris */
37684d9c625SLionel Sambuc 	case _SC_PHYS_PAGES:
37784d9c625SLionel Sambuc 		len = sizeof(mem);
37884d9c625SLionel Sambuc 		mib[0] = CTL_HW;
37984d9c625SLionel Sambuc 		mib[1] = HW_PHYSMEM64;
38084d9c625SLionel Sambuc 		return sysctl(mib, 2, &mem, &len, NULL, 0) == -1 ? -1 :
38184d9c625SLionel Sambuc 		    (long)(mem / _getpagesize());
38284d9c625SLionel Sambuc 
3832fe8fb19SBen Gras /* Native */
3842fe8fb19SBen Gras 	case _SC_SCHED_RT_TS:
3852fe8fb19SBen Gras 		if (sysctlgetmibinfo("kern.sched.rtts", &mib[0], &mib_len,
3862fe8fb19SBen Gras 		    NULL, NULL, NULL, SYSCTL_VERSION))
3872fe8fb19SBen Gras 			return -1;
3882fe8fb19SBen Gras 		break;
3892fe8fb19SBen Gras 	case _SC_SCHED_PRI_MIN:
3902fe8fb19SBen Gras 		if (sysctlgetmibinfo("kern.sched.pri_min", &mib[0], &mib_len,
3912fe8fb19SBen Gras 		    NULL, NULL, NULL, SYSCTL_VERSION))
3922fe8fb19SBen Gras 			return -1;
3932fe8fb19SBen Gras 		break;
3942fe8fb19SBen Gras 	case _SC_SCHED_PRI_MAX:
3952fe8fb19SBen Gras 		if (sysctlgetmibinfo("kern.sched.pri_max", &mib[0], &mib_len,
3962fe8fb19SBen Gras 		    NULL, NULL, NULL, SYSCTL_VERSION))
3972fe8fb19SBen Gras 			return -1;
3982fe8fb19SBen Gras 		break;
3992fe8fb19SBen Gras 	case _SC_THREAD_DESTRUCTOR_ITERATIONS:
4002fe8fb19SBen Gras 		return _POSIX_THREAD_DESTRUCTOR_ITERATIONS;
4012fe8fb19SBen Gras 	case _SC_THREAD_KEYS_MAX:
4022fe8fb19SBen Gras 		return _POSIX_THREAD_KEYS_MAX;
4032fe8fb19SBen Gras 	case _SC_THREAD_STACK_MIN:
4042fe8fb19SBen Gras 		return _getpagesize();
4052fe8fb19SBen Gras 	case _SC_THREAD_THREADS_MAX:
4062fe8fb19SBen Gras 		if (sysctlgetmibinfo("kern.maxproc", &mib[0], &mib_len,
4072fe8fb19SBen Gras 		    NULL, NULL, NULL, SYSCTL_VERSION))	/* XXX */
4082fe8fb19SBen Gras 			return -1;
4092fe8fb19SBen Gras 		goto yesno;
4102fe8fb19SBen Gras 	case _SC_THREAD_ATTR_STACKADDR:
4112fe8fb19SBen Gras 		return _POSIX_THREAD_ATTR_STACKADDR;
4122fe8fb19SBen Gras 	case _SC_THREAD_ATTR_STACKSIZE:
4132fe8fb19SBen Gras 		return _POSIX_THREAD_ATTR_STACKSIZE;
4142fe8fb19SBen Gras 	case _SC_THREAD_SAFE_FUNCTIONS:
4152fe8fb19SBen Gras 		return _POSIX_THREAD_SAFE_FUNCTIONS;
4162fe8fb19SBen Gras 	case _SC_THREAD_PRIORITY_SCHEDULING:
4172fe8fb19SBen Gras 	case _SC_THREAD_PRIO_INHERIT:
4182fe8fb19SBen Gras 	case _SC_THREAD_PRIO_PROTECT:
4192fe8fb19SBen Gras 	case _SC_THREAD_PROCESS_SHARED:
4202fe8fb19SBen Gras 		return -1;
4212fe8fb19SBen Gras 	case _SC_TTY_NAME_MAX:
4222fe8fb19SBen Gras 		return pathconf(_PATH_DEV, _PC_NAME_MAX);
4232fe8fb19SBen Gras 	default:
4242fe8fb19SBen Gras 		errno = EINVAL;
4252fe8fb19SBen Gras 		return (-1);
4262fe8fb19SBen Gras 	}
4272fe8fb19SBen Gras 	return (sysctl(mib, mib_len, &value, &len, NULL, 0) == -1 ? -1 : value);
4282fe8fb19SBen Gras }
429