Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/gen/sysconf.c	Lines:	10	166	6.0 %
Date:	2017-11-07	Branches:	4	154	2.6 %


/*	$OpenBSD: sysconf.c,v 1.25 2017/09/10 18:20:00 guenther Exp $ */
/*-
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Sean Eric Fagan of Cygnus Support.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/sem.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/socket.h>

#include <errno.h>
#include <grp.h>
#include <pthread.h>
#include <pwd.h>
#include <stdio.h>
#include <unistd.h>

/*
 * sysconf --
 *	get configurable system variables.
 *
 * XXX
 * POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values
 * not change during the lifetime of the calling process.  This would seem
 * to require that any change to system limits kill all running processes.
 * A workaround might be to cache the values when they are first retrieved
 * and then simply return the cached value on subsequent calls.  This is
 * less useful than returning up-to-date values, however.
 */
long
sysconf(int name)
{
	struct rlimit rl;
	size_t len;
	int mib[3], value, namelen, sverrno;

	len = sizeof(value);
	namelen = 2;

	switch (name) {
/* 1003.1 */
	case _SC_ARG_MAX:
		mib[0] = CTL_KERN;
		mib[1] = KERN_ARGMAX;
		break;
	case _SC_CHILD_MAX:
		if (getrlimit(RLIMIT_NPROC, &rl) != 0)
			return (-1);
		if (rl.rlim_cur == RLIM_INFINITY)
			return (-1);
		if (rl.rlim_cur > LONG_MAX) {
			errno = EOVERFLOW;
			return (-1);
		}
		return ((long)rl.rlim_cur);
	case _SC_CLK_TCK:
		return (CLK_TCK);
	case _SC_JOB_CONTROL:
		return (_POSIX_JOB_CONTROL);
	case _SC_NGROUPS_MAX:
		mib[0] = CTL_KERN;
		mib[1] = KERN_NGROUPS;
		break;
	case _SC_OPEN_MAX:
		if (getrlimit(RLIMIT_NOFILE, &rl) != 0)
			return (-1);
		if (rl.rlim_cur == RLIM_INFINITY)
			return (-1);
		if (rl.rlim_cur > LONG_MAX) {
			errno = EOVERFLOW;
			return (-1);
		}
		return ((long)rl.rlim_cur);
	case _SC_STREAM_MAX:
		if (getrlimit(RLIMIT_NOFILE, &rl) != 0)
			return (-1);
		if (rl.rlim_cur == RLIM_INFINITY)
			return (-1);
		if (rl.rlim_cur > LONG_MAX) {
			errno = EOVERFLOW;
			return (-1);
		}
		/*
		 * struct __sFILE currently has a limitation that
		 * file descriptors must fit in a signed short.
		 * This doesn't precisely capture the letter of POSIX
		 * but approximates the spirit.
		 */
		if (rl.rlim_cur > SHRT_MAX)
			return (SHRT_MAX);

		return ((long)rl.rlim_cur);
	case _SC_TZNAME_MAX:
		return (NAME_MAX);
	case _SC_SAVED_IDS:
		return (_POSIX_SAVED_IDS);
	case _SC_VERSION:
		mib[0] = CTL_KERN;
		mib[1] = KERN_POSIX1;
		break;

/* 1003.1b */
	case _SC_PAGESIZE:
		if (_pagesize != 0)
			return (_pagesize);
		mib[0] = CTL_HW;
		mib[1] = HW_PAGESIZE;
		break;
	case _SC_FSYNC:
		return (_POSIX_FSYNC);

/* 1003.1c */
	case _SC_LOGIN_NAME_MAX:
		return (LOGIN_NAME_MAX);

	case _SC_THREAD_SAFE_FUNCTIONS:
		return (_POSIX_THREAD_SAFE_FUNCTIONS);

	case _SC_GETGR_R_SIZE_MAX:
		return (_GR_BUF_LEN);

	case _SC_GETPW_R_SIZE_MAX:
		return (_PW_BUF_LEN);

/* 1003.2 */
	case _SC_BC_BASE_MAX:
		return (BC_BASE_MAX);
	case _SC_BC_DIM_MAX:
		return (BC_DIM_MAX);
	case _SC_BC_SCALE_MAX:
		return (BC_SCALE_MAX);
	case _SC_BC_STRING_MAX:
		return (BC_STRING_MAX);
	case _SC_COLL_WEIGHTS_MAX:
		return (COLL_WEIGHTS_MAX);
	case _SC_EXPR_NEST_MAX:
		return (EXPR_NEST_MAX);
	case _SC_LINE_MAX:
		return (LINE_MAX);
	case _SC_RE_DUP_MAX:
		return (RE_DUP_MAX);
	case _SC_2_VERSION:
		return (_POSIX2_VERSION);
	case _SC_2_C_BIND:
		return (_POSIX2_C_BIND);
	case _SC_2_C_DEV:
		return (_POSIX2_C_DEV);
	case _SC_2_CHAR_TERM:
		return (_POSIX2_CHAR_TERM);
	case _SC_2_FORT_DEV:
		return (_POSIX2_FORT_DEV);
	case _SC_2_FORT_RUN:
		return (_POSIX2_FORT_RUN);
	case _SC_2_LOCALEDEF:
		return (_POSIX2_LOCALEDEF);
	case _SC_2_SW_DEV:
		return (_POSIX2_SW_DEV);
	case _SC_2_UPE:
		return (_POSIX2_UPE);

/* XPG 4.2 */
	case _SC_XOPEN_SHM:
		mib[0] = CTL_KERN;
		mib[1] = KERN_SYSVSHM;
		if (sysctl(mib, namelen, &value, &len, NULL, 0) == -1)
			return (-1);
		if (value == 0)
			return (-1);
		return (value);
		break;
	case _SC_SEM_NSEMS_MAX:
		return (-1);
	case _SC_SEM_VALUE_MAX:
		return (SEM_VALUE_MAX);

/* Unsorted */
	case _SC_HOST_NAME_MAX:
		return (HOST_NAME_MAX);	/* does not include \0 */
	case _SC_MONOTONIC_CLOCK:
		return (_POSIX_MONOTONIC_CLOCK);
	case _SC_2_PBS:
	case _SC_2_PBS_ACCOUNTING:
	case _SC_2_PBS_CHECKPOINT:
	case _SC_2_PBS_LOCATE:
	case _SC_2_PBS_MESSAGE:
	case _SC_2_PBS_TRACK:
		return (_POSIX2_PBS);
	case _SC_ADVISORY_INFO:
		return (_POSIX_ADVISORY_INFO);
	case _SC_AIO_LISTIO_MAX:
	case _SC_AIO_MAX:
	case _SC_AIO_PRIO_DELTA_MAX:
		return (-1);
	case _SC_ASYNCHRONOUS_IO:
		return (_POSIX_ASYNCHRONOUS_IO);
	case _SC_ATEXIT_MAX:
		return (-1);
	case _SC_BARRIERS:
		return (_POSIX_BARRIERS);
	case _SC_CLOCK_SELECTION:
		return (_POSIX_CLOCK_SELECTION);
	case _SC_CPUTIME:
		return (_POSIX_CPUTIME);
	case _SC_DELAYTIMER_MAX:
		return (-1);
	case _SC_IOV_MAX:
		return (IOV_MAX);
	case _SC_IPV6:
#if _POSIX_IPV6 == 0
		sverrno = errno;
		value = socket(PF_INET6, SOCK_DGRAM, 0);
		errno = sverrno;
		if (value >= 0) {
			HIDDEN(close)(value);
			return (200112L);
		} else
			return (0);
#else
		return (_POSIX_IPV6);
#endif
	case _SC_MAPPED_FILES:
		return (_POSIX_MAPPED_FILES);
	case _SC_MEMLOCK:
		return (_POSIX_MEMLOCK);
	case _SC_MEMLOCK_RANGE:
		return (_POSIX_MEMLOCK_RANGE);
	case _SC_MEMORY_PROTECTION:
		return (_POSIX_MEMORY_PROTECTION);
	case _SC_MESSAGE_PASSING:
		return (_POSIX_MESSAGE_PASSING);
	case _SC_PRIORITIZED_IO:
		return (_POSIX_PRIORITIZED_IO);
	case _SC_PRIORITY_SCHEDULING:
		return (_POSIX_PRIORITY_SCHEDULING);
	case _SC_RAW_SOCKETS:
		return (_POSIX_RAW_SOCKETS);
	case _SC_READER_WRITER_LOCKS:
		return (_POSIX_READER_WRITER_LOCKS);
	case _SC_REALTIME_SIGNALS:
		return (_POSIX_REALTIME_SIGNALS);
	case _SC_REGEXP:
		return (_POSIX_REGEXP);
	case _SC_SEMAPHORES:
		return (_POSIX_SEMAPHORES);
	case _SC_SHARED_MEMORY_OBJECTS:
		return (_POSIX_SHARED_MEMORY_OBJECTS);
	case _SC_SHELL:
		return (_POSIX_SHELL);
	case _SC_SIGQUEUE_MAX:
		return (-1);
	case _SC_SPAWN:
		return (_POSIX_SPAWN);
	case _SC_SPIN_LOCKS:
		return (_POSIX_SPIN_LOCKS);
	case _SC_SPORADIC_SERVER:
		return (_POSIX_SPORADIC_SERVER);
	case _SC_SYNCHRONIZED_IO:
		return (_POSIX_SYNCHRONIZED_IO);
	case _SC_SYMLOOP_MAX:
		return (SYMLOOP_MAX);
	case _SC_THREAD_ATTR_STACKADDR:
		return (_POSIX_THREAD_ATTR_STACKADDR);
	case _SC_THREAD_ATTR_STACKSIZE:
		return (_POSIX_THREAD_ATTR_STACKSIZE);
	case _SC_THREAD_CPUTIME:
		return (_POSIX_THREAD_CPUTIME);
	case _SC_THREAD_DESTRUCTOR_ITERATIONS:
		return (PTHREAD_DESTRUCTOR_ITERATIONS);
	case _SC_THREAD_KEYS_MAX:
		return (PTHREAD_KEYS_MAX);
	case _SC_THREAD_PRIO_INHERIT:
		return (_POSIX_THREAD_PRIO_INHERIT);
	case _SC_THREAD_PRIO_PROTECT:
		return (_POSIX_THREAD_PRIO_PROTECT);
	case _SC_THREAD_PRIORITY_SCHEDULING:
		return (_POSIX_THREAD_PRIORITY_SCHEDULING);
	case _SC_THREAD_PROCESS_SHARED:
		return (_POSIX_THREAD_PROCESS_SHARED);
	case _SC_THREAD_ROBUST_PRIO_INHERIT:
		return (_POSIX_THREAD_ROBUST_PRIO_INHERIT);
	case _SC_THREAD_ROBUST_PRIO_PROTECT:
		return (_POSIX_THREAD_ROBUST_PRIO_PROTECT);
	case _SC_THREAD_SPORADIC_SERVER:
		return (_POSIX_THREAD_SPORADIC_SERVER);
	case _SC_THREAD_STACK_MIN:
		return (PTHREAD_STACK_MIN);
	case _SC_THREAD_THREADS_MAX:
		return (PTHREAD_THREADS_MAX);
	case _SC_THREADS:
		return (_POSIX_THREADS);
	case _SC_TIMEOUTS:
		return (_POSIX_TIMEOUTS);
	case _SC_TIMER_MAX:
		return (-1);
	case _SC_TIMERS:
		return (_POSIX_TIMERS);
	case _SC_TRACE:
	case _SC_TRACE_EVENT_FILTER:
	case _SC_TRACE_EVENT_NAME_MAX:
	case _SC_TRACE_INHERIT:
	case _SC_TRACE_LOG:
		return (_POSIX_TRACE);
	case _SC_TTY_NAME_MAX:
		return (TTY_NAME_MAX);
	case _SC_TYPED_MEMORY_OBJECTS:
		return (_POSIX_TYPED_MEMORY_OBJECTS);
	case _SC_V6_ILP32_OFF32:
		return (_POSIX_V6_ILP32_OFF32);
	case _SC_V6_ILP32_OFFBIG:
#if _POSIX_V6_ILP32_OFFBIG == 0
		if (sizeof(int) * CHAR_BIT == 32 &&
		    sizeof(long) * CHAR_BIT == 32 &&
		    sizeof(void *) * CHAR_BIT == 32 &&
		    sizeof(off_t) * CHAR_BIT >= 64)
			return 1;
		else
			return -1;
#else
		return (_POSIX_V6_ILP32_OFFBIG);
#endif
	case _SC_V6_LP64_OFF64:
#if _POSIX_V6_LP64_OFF64 == 0
		if (sizeof(int) * CHAR_BIT == 32 &&
		    sizeof(long) * CHAR_BIT == 64 &&
		    sizeof(void *) * CHAR_BIT == 64 &&
		    sizeof(off_t) * CHAR_BIT == 64)
			return 1;
		else
			return -1;
#else
		return (_POSIX_V6_LP64_OFF64);
#endif
	case _SC_V6_LPBIG_OFFBIG:
#if _POSIX_V6_LPBIG_OFFBIG == 0
		if (sizeof(int) * CHAR_BIT >= 32 &&
		    sizeof(long) * CHAR_BIT >= 64 &&
		    sizeof(void *) * CHAR_BIT >= 64 &&
		    sizeof(off_t) * CHAR_BIT >= 64)
			return 1;
		else
			return -1;
#else
		return (_POSIX_V6_LPBIG_OFFBIG);
#endif
	case _SC_V7_ILP32_OFF32:
		return (_POSIX_V7_ILP32_OFF32);
	case _SC_V7_ILP32_OFFBIG:
#if _POSIX_V7_ILP32_OFFBIG == 0
		if (sizeof(int) * CHAR_BIT == 32 &&
		    sizeof(long) * CHAR_BIT == 32 &&
		    sizeof(void *) * CHAR_BIT == 32 &&
		    sizeof(off_t) * CHAR_BIT >= 64)
			return 1;
		else
			return -1;
#else
		return (_POSIX_V7_ILP32_OFFBIG);
#endif
	case _SC_V7_LP64_OFF64:
#if _POSIX_V7_LP64_OFF64 == 0
		if (sizeof(int) * CHAR_BIT == 32 &&
		    sizeof(long) * CHAR_BIT == 64 &&
		    sizeof(void *) * CHAR_BIT == 64 &&
		    sizeof(off_t) * CHAR_BIT == 64)
			return 1;
		else
			return -1;
#else
		return (_POSIX_V7_LP64_OFF64);
#endif
	case _SC_V7_LPBIG_OFFBIG:
#if _POSIX_V7_LPBIG_OFFBIG == 0
		if (sizeof(int) * CHAR_BIT >= 32 &&
		    sizeof(long) * CHAR_BIT >= 64 &&
		    sizeof(void *) * CHAR_BIT >= 64 &&
		    sizeof(off_t) * CHAR_BIT >= 64)
			return 1;
		else
			return -1;
#else
		return (_POSIX_V7_LPBIG_OFFBIG);
#endif
	case _SC_XOPEN_CRYPT:
		return (_XOPEN_CRYPT);
	case _SC_XOPEN_ENH_I18N:
		return (_XOPEN_ENH_I18N);
	case _SC_XOPEN_LEGACY:
		return (_XOPEN_LEGACY);
	case _SC_XOPEN_REALTIME:
		return (_XOPEN_REALTIME);
	case _SC_XOPEN_REALTIME_THREADS:
		return (_XOPEN_REALTIME_THREADS);
	case _SC_XOPEN_STREAMS:
		return (_XOPEN_STREAMS);
	case _SC_XOPEN_UNIX:
		return (_XOPEN_UNIX);
	case _SC_XOPEN_UUCP:
		return (_XOPEN_UUCP);
#ifdef _XOPEN_VERSION
	case _SC_XOPEN_VERSION:
		return (_XOPEN_VERSION);
#endif

/* Extensions */
	case _SC_PHYS_PAGES:
	{
		int64_t physmem;

		mib[0] = CTL_HW;
		mib[1] = HW_PHYSMEM64;
		len = sizeof(physmem);
		if (sysctl(mib, namelen, &physmem, &len, NULL, 0) == -1)
			return (-1);
		return (physmem / getpagesize());
	}
	case _SC_AVPHYS_PAGES:
	{
		struct uvmexp uvmexp;

		mib[0] = CTL_VM;
		mib[1] = VM_UVMEXP;
		len = sizeof(uvmexp);
		if (sysctl(mib, namelen, &uvmexp, &len, NULL, 0) == -1)
			return (-1);
		return (uvmexp.free);
	}

	case _SC_NPROCESSORS_CONF:
		mib[0] = CTL_HW;
		mib[1] = HW_NCPU;
		break;
	case _SC_NPROCESSORS_ONLN:
		mib[0] = CTL_HW;
		mib[1] = HW_NCPU;
		break;

	default:
		errno = EINVAL;
		return (-1);
	}
	return (sysctl(mib, namelen, &value, &len, NULL, 0) == -1 ? -1 : value);
}
DEF_WEAK(sysconf);


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: sysconf.c,v 1.25 2017/09/10 18:20:00 guenther Exp $ */
2			/*-
3			* Copyright (c) 1993
4			* The Regents of the University of California. All rights reserved.
5			*
6			* This code is derived from software contributed to Berkeley by
7			* Sean Eric Fagan of Cygnus Support.
8			*
9			* Redistribution and use in source and binary forms, with or without
10			* modification, are permitted provided that the following conditions
11			* are met:
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			* 2. Redistributions in binary form must reproduce the above copyright
15			* notice, this list of conditions and the following disclaimer in the
16			* documentation and/or other materials provided with the distribution.
17			* 3. Neither the name of the University nor the names of its contributors
18			* may be used to endorse or promote products derived from this software
19			* without specific prior written permission.
20			*
21			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31			* SUCH DAMAGE.
32			*/
33
34			#include <sys/types.h>
35			#include <sys/sem.h>
36			#include <sys/sysctl.h>
37			#include <sys/time.h>
38			#include <sys/resource.h>
39			#include <sys/socket.h>
40
41			#include <errno.h>
42			#include <grp.h>
43			#include <pthread.h>
44			#include <pwd.h>
45			#include <stdio.h>
46			#include <unistd.h>
47
48			/*
49			* sysconf --
50			* get configurable system variables.
51			*
52			* XXX
53			* POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values
54			* not change during the lifetime of the calling process. This would seem
55			* to require that any change to system limits kill all running processes.
56			* A workaround might be to cache the values when they are first retrieved
57			* and then simply return the cached value on subsequent calls. This is
58			* less useful than returning up-to-date values, however.
59			*/
60			long
61			sysconf(int name)
62			{
63		4	struct rlimit rl;
64		2	size_t len;
65		2	int mib[3], value, namelen, sverrno;
66
67		2	len = sizeof(value);
68			namelen = 2;
69
70	✗✗✗✗ ✓✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗✗✗ ✗✗	2	switch (name) {
71			/* 1003.1 */
72			case _SC_ARG_MAX:
73			mib[0] = CTL_KERN;
74			mib[1] = KERN_ARGMAX;
75			break;
76			case _SC_CHILD_MAX:
77			if (getrlimit(RLIMIT_NPROC, &rl) != 0)
78			return (-1);
79			if (rl.rlim_cur == RLIM_INFINITY)
80			return (-1);
81			if (rl.rlim_cur > LONG_MAX) {
82			errno = EOVERFLOW;
83			return (-1);
84			}
85			return ((long)rl.rlim_cur);
86			case _SC_CLK_TCK:
87			return (CLK_TCK);
88			case _SC_JOB_CONTROL:
89			return (_POSIX_JOB_CONTROL);
90			case _SC_NGROUPS_MAX:
91			mib[0] = CTL_KERN;
92			mib[1] = KERN_NGROUPS;
93			break;
94			case _SC_OPEN_MAX:
95	✗✓	2	if (getrlimit(RLIMIT_NOFILE, &rl) != 0)
96			return (-1);
97	✗✓	2	if (rl.rlim_cur == RLIM_INFINITY)
98			return (-1);
99	✗✓	2	if (rl.rlim_cur > LONG_MAX) {
100			errno = EOVERFLOW;
101			return (-1);
102			}
103		2	return ((long)rl.rlim_cur);
104			case _SC_STREAM_MAX:
105			if (getrlimit(RLIMIT_NOFILE, &rl) != 0)
106			return (-1);
107			if (rl.rlim_cur == RLIM_INFINITY)
108			return (-1);
109			if (rl.rlim_cur > LONG_MAX) {
110			errno = EOVERFLOW;
111			return (-1);
112			}
113			/*
114			* struct __sFILE currently has a limitation that
115			* file descriptors must fit in a signed short.
116			* This doesn't precisely capture the letter of POSIX
117			* but approximates the spirit.
118			*/
119			if (rl.rlim_cur > SHRT_MAX)
120			return (SHRT_MAX);
121
122			return ((long)rl.rlim_cur);
123			case _SC_TZNAME_MAX:
124			return (NAME_MAX);
125			case _SC_SAVED_IDS:
126			return (_POSIX_SAVED_IDS);
127			case _SC_VERSION:
128			mib[0] = CTL_KERN;
129			mib[1] = KERN_POSIX1;
130			break;
131
132			/* 1003.1b */
133			case _SC_PAGESIZE:
134			if (_pagesize != 0)
135			return (_pagesize);
136			mib[0] = CTL_HW;
137			mib[1] = HW_PAGESIZE;
138			break;
139			case _SC_FSYNC:
140			return (_POSIX_FSYNC);
141
142			/* 1003.1c */
143			case _SC_LOGIN_NAME_MAX:
144			return (LOGIN_NAME_MAX);
145
146			case _SC_THREAD_SAFE_FUNCTIONS:
147			return (_POSIX_THREAD_SAFE_FUNCTIONS);
148
149			case _SC_GETGR_R_SIZE_MAX:
150			return (_GR_BUF_LEN);
151
152			case _SC_GETPW_R_SIZE_MAX:
153			return (_PW_BUF_LEN);
154
155			/* 1003.2 */
156			case _SC_BC_BASE_MAX:
157			return (BC_BASE_MAX);
158			case _SC_BC_DIM_MAX:
159			return (BC_DIM_MAX);
160			case _SC_BC_SCALE_MAX:
161			return (BC_SCALE_MAX);
162			case _SC_BC_STRING_MAX:
163			return (BC_STRING_MAX);
164			case _SC_COLL_WEIGHTS_MAX:
165			return (COLL_WEIGHTS_MAX);
166			case _SC_EXPR_NEST_MAX:
167			return (EXPR_NEST_MAX);
168			case _SC_LINE_MAX:
169			return (LINE_MAX);
170			case _SC_RE_DUP_MAX:
171			return (RE_DUP_MAX);
172			case _SC_2_VERSION:
173			return (_POSIX2_VERSION);
174			case _SC_2_C_BIND:
175			return (_POSIX2_C_BIND);
176			case _SC_2_C_DEV:
177			return (_POSIX2_C_DEV);
178			case _SC_2_CHAR_TERM:
179			return (_POSIX2_CHAR_TERM);
180			case _SC_2_FORT_DEV:
181			return (_POSIX2_FORT_DEV);
182			case _SC_2_FORT_RUN:
183			return (_POSIX2_FORT_RUN);
184			case _SC_2_LOCALEDEF:
185			return (_POSIX2_LOCALEDEF);
186			case _SC_2_SW_DEV:
187			return (_POSIX2_SW_DEV);
188			case _SC_2_UPE:
189			return (_POSIX2_UPE);
190
191			/* XPG 4.2 */
192			case _SC_XOPEN_SHM:
193			mib[0] = CTL_KERN;
194			mib[1] = KERN_SYSVSHM;
195			if (sysctl(mib, namelen, &value, &len, NULL, 0) == -1)
196			return (-1);
197			if (value == 0)
198			return (-1);
199			return (value);
200			break;
201			case _SC_SEM_NSEMS_MAX:
202			return (-1);
203			case _SC_SEM_VALUE_MAX:
204			return (SEM_VALUE_MAX);
205
206			/* Unsorted */
207			case _SC_HOST_NAME_MAX:
208			return (HOST_NAME_MAX); /* does not include \0 */
209			case _SC_MONOTONIC_CLOCK:
210			return (_POSIX_MONOTONIC_CLOCK);
211			case _SC_2_PBS:
212			case _SC_2_PBS_ACCOUNTING:
213			case _SC_2_PBS_CHECKPOINT:
214			case _SC_2_PBS_LOCATE:
215			case _SC_2_PBS_MESSAGE:
216			case _SC_2_PBS_TRACK:
217			return (_POSIX2_PBS);
218			case _SC_ADVISORY_INFO:
219			return (_POSIX_ADVISORY_INFO);
220			case _SC_AIO_LISTIO_MAX:
221			case _SC_AIO_MAX:
222			case _SC_AIO_PRIO_DELTA_MAX:
223			return (-1);
224			case _SC_ASYNCHRONOUS_IO:
225			return (_POSIX_ASYNCHRONOUS_IO);
226			case _SC_ATEXIT_MAX:
227			return (-1);
228			case _SC_BARRIERS:
229			return (_POSIX_BARRIERS);
230			case _SC_CLOCK_SELECTION:
231			return (_POSIX_CLOCK_SELECTION);
232			case _SC_CPUTIME:
233			return (_POSIX_CPUTIME);
234			case _SC_DELAYTIMER_MAX:
235			return (-1);
236			case _SC_IOV_MAX:
237			return (IOV_MAX);
238			case _SC_IPV6:
239			#if _POSIX_IPV6 == 0
240			sverrno = errno;
241			value = socket(PF_INET6, SOCK_DGRAM, 0);
242			errno = sverrno;
243			if (value >= 0) {
244			HIDDEN(close)(value);
245			return (200112L);
246			} else
247			return (0);
248			#else
249			return (_POSIX_IPV6);
250			#endif
251			case _SC_MAPPED_FILES:
252			return (_POSIX_MAPPED_FILES);
253			case _SC_MEMLOCK:
254			return (_POSIX_MEMLOCK);
255			case _SC_MEMLOCK_RANGE:
256			return (_POSIX_MEMLOCK_RANGE);
257			case _SC_MEMORY_PROTECTION:
258			return (_POSIX_MEMORY_PROTECTION);
259			case _SC_MESSAGE_PASSING:
260			return (_POSIX_MESSAGE_PASSING);
261			case _SC_PRIORITIZED_IO:
262			return (_POSIX_PRIORITIZED_IO);
263			case _SC_PRIORITY_SCHEDULING:
264			return (_POSIX_PRIORITY_SCHEDULING);
265			case _SC_RAW_SOCKETS:
266			return (_POSIX_RAW_SOCKETS);
267			case _SC_READER_WRITER_LOCKS:
268			return (_POSIX_READER_WRITER_LOCKS);
269			case _SC_REALTIME_SIGNALS:
270			return (_POSIX_REALTIME_SIGNALS);
271			case _SC_REGEXP:
272			return (_POSIX_REGEXP);
273			case _SC_SEMAPHORES:
274			return (_POSIX_SEMAPHORES);
275			case _SC_SHARED_MEMORY_OBJECTS:
276			return (_POSIX_SHARED_MEMORY_OBJECTS);
277			case _SC_SHELL:
278			return (_POSIX_SHELL);
279			case _SC_SIGQUEUE_MAX:
280			return (-1);
281			case _SC_SPAWN:
282			return (_POSIX_SPAWN);
283			case _SC_SPIN_LOCKS:
284			return (_POSIX_SPIN_LOCKS);
285			case _SC_SPORADIC_SERVER:
286			return (_POSIX_SPORADIC_SERVER);
287			case _SC_SYNCHRONIZED_IO:
288			return (_POSIX_SYNCHRONIZED_IO);
289			case _SC_SYMLOOP_MAX:
290			return (SYMLOOP_MAX);
291			case _SC_THREAD_ATTR_STACKADDR:
292			return (_POSIX_THREAD_ATTR_STACKADDR);
293			case _SC_THREAD_ATTR_STACKSIZE:
294			return (_POSIX_THREAD_ATTR_STACKSIZE);
295			case _SC_THREAD_CPUTIME:
296			return (_POSIX_THREAD_CPUTIME);
297			case _SC_THREAD_DESTRUCTOR_ITERATIONS:
298			return (PTHREAD_DESTRUCTOR_ITERATIONS);
299			case _SC_THREAD_KEYS_MAX:
300			return (PTHREAD_KEYS_MAX);
301			case _SC_THREAD_PRIO_INHERIT:
302			return (_POSIX_THREAD_PRIO_INHERIT);
303			case _SC_THREAD_PRIO_PROTECT:
304			return (_POSIX_THREAD_PRIO_PROTECT);
305			case _SC_THREAD_PRIORITY_SCHEDULING:
306			return (_POSIX_THREAD_PRIORITY_SCHEDULING);
307			case _SC_THREAD_PROCESS_SHARED:
308			return (_POSIX_THREAD_PROCESS_SHARED);
309			case _SC_THREAD_ROBUST_PRIO_INHERIT:
310			return (_POSIX_THREAD_ROBUST_PRIO_INHERIT);
311			case _SC_THREAD_ROBUST_PRIO_PROTECT:
312			return (_POSIX_THREAD_ROBUST_PRIO_PROTECT);
313			case _SC_THREAD_SPORADIC_SERVER:
314			return (_POSIX_THREAD_SPORADIC_SERVER);
315			case _SC_THREAD_STACK_MIN:
316			return (PTHREAD_STACK_MIN);
317			case _SC_THREAD_THREADS_MAX:
318			return (PTHREAD_THREADS_MAX);
319			case _SC_THREADS:
320			return (_POSIX_THREADS);
321			case _SC_TIMEOUTS:
322			return (_POSIX_TIMEOUTS);
323			case _SC_TIMER_MAX:
324			return (-1);
325			case _SC_TIMERS:
326			return (_POSIX_TIMERS);
327			case _SC_TRACE:
328			case _SC_TRACE_EVENT_FILTER:
329			case _SC_TRACE_EVENT_NAME_MAX:
330			case _SC_TRACE_INHERIT:
331			case _SC_TRACE_LOG:
332			return (_POSIX_TRACE);
333			case _SC_TTY_NAME_MAX:
334			return (TTY_NAME_MAX);
335			case _SC_TYPED_MEMORY_OBJECTS:
336			return (_POSIX_TYPED_MEMORY_OBJECTS);
337			case _SC_V6_ILP32_OFF32:
338			return (_POSIX_V6_ILP32_OFF32);
339			case _SC_V6_ILP32_OFFBIG:
340			#if _POSIX_V6_ILP32_OFFBIG == 0
341			if (sizeof(int) * CHAR_BIT == 32 &&
342			sizeof(long) * CHAR_BIT == 32 &&
343			sizeof(void ) CHAR_BIT == 32 &&
344			sizeof(off_t) * CHAR_BIT >= 64)
345			return 1;
346			else
347			return -1;
348			#else
349			return (_POSIX_V6_ILP32_OFFBIG);
350			#endif
351			case _SC_V6_LP64_OFF64:
352			#if _POSIX_V6_LP64_OFF64 == 0
353			if (sizeof(int) * CHAR_BIT == 32 &&
354			sizeof(long) * CHAR_BIT == 64 &&
355			sizeof(void ) CHAR_BIT == 64 &&
356			sizeof(off_t) * CHAR_BIT == 64)
357			return 1;
358			else
359			return -1;
360			#else
361			return (_POSIX_V6_LP64_OFF64);
362			#endif
363			case _SC_V6_LPBIG_OFFBIG:
364			#if _POSIX_V6_LPBIG_OFFBIG == 0
365			if (sizeof(int) * CHAR_BIT >= 32 &&
366			sizeof(long) * CHAR_BIT >= 64 &&
367			sizeof(void ) CHAR_BIT >= 64 &&
368			sizeof(off_t) * CHAR_BIT >= 64)
369			return 1;
370			else
371			return -1;
372			#else
373			return (_POSIX_V6_LPBIG_OFFBIG);
374			#endif
375			case _SC_V7_ILP32_OFF32:
376			return (_POSIX_V7_ILP32_OFF32);
377			case _SC_V7_ILP32_OFFBIG:
378			#if _POSIX_V7_ILP32_OFFBIG == 0
379			if (sizeof(int) * CHAR_BIT == 32 &&
380			sizeof(long) * CHAR_BIT == 32 &&
381			sizeof(void ) CHAR_BIT == 32 &&
382			sizeof(off_t) * CHAR_BIT >= 64)
383			return 1;
384			else
385			return -1;
386			#else
387			return (_POSIX_V7_ILP32_OFFBIG);
388			#endif
389			case _SC_V7_LP64_OFF64:
390			#if _POSIX_V7_LP64_OFF64 == 0
391			if (sizeof(int) * CHAR_BIT == 32 &&
392			sizeof(long) * CHAR_BIT == 64 &&
393			sizeof(void ) CHAR_BIT == 64 &&
394			sizeof(off_t) * CHAR_BIT == 64)
395			return 1;
396			else
397			return -1;
398			#else
399			return (_POSIX_V7_LP64_OFF64);
400			#endif
401			case _SC_V7_LPBIG_OFFBIG:
402			#if _POSIX_V7_LPBIG_OFFBIG == 0
403			if (sizeof(int) * CHAR_BIT >= 32 &&
404			sizeof(long) * CHAR_BIT >= 64 &&
405			sizeof(void ) CHAR_BIT >= 64 &&
406			sizeof(off_t) * CHAR_BIT >= 64)
407			return 1;
408			else
409			return -1;
410			#else
411			return (_POSIX_V7_LPBIG_OFFBIG);
412			#endif
413			case _SC_XOPEN_CRYPT:
414			return (_XOPEN_CRYPT);
415			case _SC_XOPEN_ENH_I18N:
416			return (_XOPEN_ENH_I18N);
417			case _SC_XOPEN_LEGACY:
418			return (_XOPEN_LEGACY);
419			case _SC_XOPEN_REALTIME:
420			return (_XOPEN_REALTIME);
421			case _SC_XOPEN_REALTIME_THREADS:
422			return (_XOPEN_REALTIME_THREADS);
423			case _SC_XOPEN_STREAMS:
424			return (_XOPEN_STREAMS);
425			case _SC_XOPEN_UNIX:
426			return (_XOPEN_UNIX);
427			case _SC_XOPEN_UUCP:
428			return (_XOPEN_UUCP);
429			#ifdef _XOPEN_VERSION
430			case _SC_XOPEN_VERSION:
431			return (_XOPEN_VERSION);
432			#endif
433
434			/* Extensions */
435			case _SC_PHYS_PAGES:
436			{
437			int64_t physmem;
438
439			mib[0] = CTL_HW;
440			mib[1] = HW_PHYSMEM64;
441			len = sizeof(physmem);
442			if (sysctl(mib, namelen, &physmem, &len, NULL, 0) == -1)
443			return (-1);
444			return (physmem / getpagesize());
445			}
446			case _SC_AVPHYS_PAGES:
447			{
448			struct uvmexp uvmexp;
449
450			mib[0] = CTL_VM;
451			mib[1] = VM_UVMEXP;
452			len = sizeof(uvmexp);
453			if (sysctl(mib, namelen, &uvmexp, &len, NULL, 0) == -1)
454			return (-1);
455			return (uvmexp.free);
456			}
457
458			case _SC_NPROCESSORS_CONF:
459			mib[0] = CTL_HW;
460			mib[1] = HW_NCPU;
461			break;
462			case _SC_NPROCESSORS_ONLN:
463			mib[0] = CTL_HW;
464			mib[1] = HW_NCPU;
465			break;
466
467			default:
468			errno = EINVAL;
469			return (-1);
470			}
471			return (sysctl(mib, namelen, &value, &len, NULL, 0) == -1 ? -1 : value);
472		2	}
473			DEF_WEAK(sysconf);