diff options
Diffstat (limited to 'lib/libc/gen/sysconf.c')
| -rw-r--r-- | lib/libc/gen/sysconf.c | 608 |
1 files changed, 0 insertions, 608 deletions
diff --git a/lib/libc/gen/sysconf.c b/lib/libc/gen/sysconf.c deleted file mode 100644 index 4618f32..0000000 --- a/lib/libc/gen/sysconf.c +++ /dev/null @@ -1,608 +0,0 @@ -/*- - * 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. - * 4. 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. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)sysconf.c 8.2 (Berkeley) 3/20/94"; -#endif /* LIBC_SCCS and not lint */ -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/time.h> -#include <sys/sysctl.h> -#include <sys/resource.h> -#include <sys/socket.h> - -#include <errno.h> -#include <limits.h> -#include <paths.h> -#include <pthread.h> /* we just need the limits */ -#include <time.h> -#include <unistd.h> - -#include "../stdlib/atexit.h" -#include "tzfile.h" /* from ../../../contrib/tzcode/stdtime */ - -#define _PATH_ZONEINFO TZDIR /* from tzfile.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(name) - int name; -{ - struct rlimit rl; - size_t len; - int mib[2], sverrno, value; - long lvalue, defaultresult; - const char *path; - - defaultresult = -1; - - switch (name) { - 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_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_JOB_CONTROL: - return (_POSIX_JOB_CONTROL); - case _SC_SAVED_IDS: - /* XXX - must be 1 */ - mib[0] = CTL_KERN; - mib[1] = KERN_SAVED_IDS; - goto yesno; - case _SC_VERSION: - mib[0] = CTL_KERN; - mib[1] = KERN_POSIX1; - break; - 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: - /* - * This is something of a lie, but it would be silly at - * this point to try to deduce this from the contents - * of the filesystem. - */ - 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); - case _SC_TZNAME_MAX: - path = _PATH_ZONEINFO; -do_NAME_MAX: - sverrno = errno; - errno = 0; - lvalue = pathconf(path, _PC_NAME_MAX); - if (lvalue == -1 && errno != 0) - return (-1); - errno = sverrno; - return (lvalue); - - case _SC_ASYNCHRONOUS_IO: -#if _POSIX_ASYNCHRONOUS_IO == 0 - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO; - break; -#else - return (_POSIX_ASYNCHRONOUS_IO); -#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: -#if _POSIX_MESSAGE_PASSING == 0 - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_MESSAGE_PASSING; - goto yesno; -#else - return (_POSIX_MESSAGE_PASSING); -#endif - case _SC_PRIORITIZED_IO: -#if _POSIX_PRIORITIZED_IO == 0 - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_PRIORITIZED_IO; - goto yesno; -#else - return (_POSIX_PRIORITIZED_IO); -#endif - case _SC_PRIORITY_SCHEDULING: -#if _POSIX_PRIORITY_SCHEDULING == 0 - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING; - goto yesno; -#else - return (_POSIX_PRIORITY_SCHEDULING); -#endif - case _SC_REALTIME_SIGNALS: -#if _POSIX_REALTIME_SIGNALS == 0 - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_REALTIME_SIGNALS; - goto yesno; -#else - return (_POSIX_REALTIME_SIGNALS); -#endif - case _SC_SEMAPHORES: -#if _POSIX_SEMAPHORES == 0 - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_SEMAPHORES; - goto yesno; -#else - return (_POSIX_SEMAPHORES); -#endif - case _SC_FSYNC: - return (_POSIX_FSYNC); - - case _SC_SHARED_MEMORY_OBJECTS: - return (_POSIX_SHARED_MEMORY_OBJECTS); - case _SC_SYNCHRONIZED_IO: -#if _POSIX_SYNCHRONIZED_IO == 0 - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_SYNCHRONIZED_IO; - goto yesno; -#else - return (_POSIX_SYNCHRONIZED_IO); -#endif - case _SC_TIMERS: -#if _POSIX_TIMERS == 0 - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_TIMERS; - goto yesno; -#else - return (_POSIX_TIMERS); -#endif - case _SC_AIO_LISTIO_MAX: - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX; - break; - case _SC_AIO_MAX: - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_AIO_MAX; - break; - case _SC_AIO_PRIO_DELTA_MAX: - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX; - break; - case _SC_DELAYTIMER_MAX: - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_DELAYTIMER_MAX; - goto yesno; - case _SC_MQ_OPEN_MAX: - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_MQ_OPEN_MAX; - goto yesno; - case _SC_PAGESIZE: - defaultresult = getpagesize(); - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_PAGESIZE; - goto yesno; - case _SC_RTSIG_MAX: - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_RTSIG_MAX; - goto yesno; - case _SC_SEM_NSEMS_MAX: - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX; - goto yesno; - case _SC_SEM_VALUE_MAX: - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_SEM_VALUE_MAX; - goto yesno; - case _SC_SIGQUEUE_MAX: - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_SIGQUEUE_MAX; - goto yesno; - case _SC_TIMER_MAX: - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_TIMER_MAX; -yesno: - len = sizeof(value); - if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) - return (-1); - if (value == 0) - return (defaultresult); - return ((long)value); - - 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: -#if _POSIX2_PBS == 0 -#error "don't know how to determine _SC_2_PBS" - /* - * This probably requires digging through the filesystem - * to see if the appropriate package has been installed. - * Since we don't currently support this option at all, - * it's not worth the effort to write the code now. - * Figuring out which of the sub-options are supported - * would be even more difficult, so it's probably easier - * to always say ``no''. - */ -#else - return (_POSIX2_PBS); -#endif - case _SC_ADVISORY_INFO: -#if _POSIX_ADVISORY_INFO == 0 -#error "_POSIX_ADVISORY_INFO" -#else - return (_POSIX_ADVISORY_INFO); -#endif - case _SC_BARRIERS: -#if _POSIX_BARRIERS == 0 -#error "_POSIX_BARRIERS" -#else - return (_POSIX_BARRIERS); -#endif - case _SC_CLOCK_SELECTION: -#if _POSIX_CLOCK_SELECTION == 0 -#error "_POSIX_CLOCK_SELECTION" -#else - return (_POSIX_CLOCK_SELECTION); -#endif - case _SC_CPUTIME: -#if _POSIX_CPUTIME == 0 -#error "_POSIX_CPUTIME" -#else - return (_POSIX_CPUTIME); -#endif -#ifdef notdef - case _SC_FILE_LOCKING: - /* - * XXX - The standard doesn't tell us how to define - * _POSIX_FILE_LOCKING, so we can't answer this one. - */ -#endif -#if _POSIX_THREAD_SAFE_FUNCTIONS > -1 - case _SC_GETGR_R_SIZE_MAX: - case _SC_GETPW_R_SIZE_MAX: -#error "somebody needs to implement this" -#endif - case _SC_HOST_NAME_MAX: - return (MAXHOSTNAMELEN - 1); /* does not include \0 */ - case _SC_LOGIN_NAME_MAX: - return (MAXLOGNAME); - case _SC_MONOTONIC_CLOCK: -#if _POSIX_MONOTONIC_CLOCK == 0 -#error "_POSIX_MONOTONIC_CLOCK" -#else - return (_POSIX_MONOTONIC_CLOCK); -#endif -#if _POSIX_MESSAGE_PASSING > -1 - case _SC_MQ_PRIO_MAX: - return (MQ_PRIO_MAX); -#endif - case _SC_READER_WRITER_LOCKS: - return (_POSIX_READER_WRITER_LOCKS); - case _SC_REGEXP: - return (_POSIX_REGEXP); - case _SC_SHELL: - return (_POSIX_SHELL); - case _SC_SPAWN: - return (_POSIX_SPAWN); - case _SC_SPIN_LOCKS: - return (_POSIX_SPIN_LOCKS); - case _SC_SPORADIC_SERVER: -#if _POSIX_SPORADIC_SERVER == 0 -#error "_POSIX_SPORADIC_SERVER" -#else - return (_POSIX_SPORADIC_SERVER); -#endif - 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_SAFE_FUNCTIONS: - return (_POSIX_THREAD_SAFE_FUNCTIONS); - case _SC_THREAD_STACK_MIN: - return (PTHREAD_STACK_MIN); - case _SC_THREAD_THREADS_MAX: - return (PTHREAD_THREADS_MAX); /* XXX wrong type! */ - case _SC_TIMEOUTS: - return (_POSIX_TIMEOUTS); - case _SC_THREADS: - return (_POSIX_THREADS); - case _SC_TRACE: -#if _POSIX_TRACE == 0 -#error "_POSIX_TRACE" - /* While you're implementing this, also do the ones below. */ -#else - return (_POSIX_TRACE); -#endif -#if _POSIX_TRACE > -1 - case _SC_TRACE_EVENT_FILTER: - return (_POSIX_TRACE_EVENT_FILTER); - case _SC_TRACE_INHERIT: - return (_POSIX_TRACE_INHERIT); - case _SC_TRACE_LOG: - return (_POSIX_TRACE_LOG); -#endif - case _SC_TTY_NAME_MAX: - path = _PATH_DEV; - goto do_NAME_MAX; - case _SC_TYPED_MEMORY_OBJECTS: -#if _POSIX_TYPED_MEMORY_OBJECTS == 0 -#error "_POSIX_TYPED_MEMORY_OBJECTS" -#else - return (_POSIX_TYPED_MEMORY_OBJECTS); -#endif - case _SC_V6_ILP32_OFF32: -#if _V6_ILP32_OFF32 == 0 - if (sizeof(int) * CHAR_BIT == 32 && - sizeof(int) == sizeof(long) && - sizeof(long) == sizeof(void *) && - sizeof(void *) == sizeof(off_t)) - return 1; - else - return -1; -#else - return (_V6_ILP32_OFF32); -#endif - case _SC_V6_ILP32_OFFBIG: -#if _V6_ILP32_OFFBIG == 0 - if (sizeof(int) * CHAR_BIT == 32 && - sizeof(int) == sizeof(long) && - sizeof(long) == sizeof(void *) && - sizeof(off_t) * CHAR_BIT >= 64) - return 1; - else - return -1; -#else - return (_V6_ILP32_OFFBIG); -#endif - case _SC_V6_LP64_OFF64: -#if _V6_LP64_OFF64 == 0 - if (sizeof(int) * CHAR_BIT == 32 && - sizeof(long) * CHAR_BIT == 64 && - sizeof(long) == sizeof(void *) && - sizeof(void *) == sizeof(off_t)) - return 1; - else - return -1; -#else - return (_V6_LP64_OFF64); -#endif - case _SC_V6_LPBIG_OFFBIG: -#if _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 (_V6_LPBIG_OFFBIG); -#endif - case _SC_ATEXIT_MAX: - return (ATEXIT_SIZE); - case _SC_IOV_MAX: - mib[0] = CTL_KERN; - mib[1] = KERN_IOV_MAX; - break; - 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: -#if _XOPEN_REALTIME == 0 - sverrno = errno; - value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 && - sysconf(_SC_MEMLOCK) > 0 && - sysconf(_SC_MEMLOCK_RANGE) > 0 && - sysconf(_SC_MESSAGE_PASSING) > 0 && - sysconf(_SC_PRIORITY_SCHEDULING) > 0 && - sysconf(_SC_REALTIME_SIGNALS) > 0 && - sysconf(_SC_SEMAPHORES) > 0 && - sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 && - sysconf(_SC_SYNCHRONIZED_IO) > 0 && - sysconf(_SC_TIMERS) > 0; - errno = sverrno; - if (value) - return (200112L); - else - return (-1); -#else - return (_XOPEN_REALTIME); -#endif - case _SC_XOPEN_REALTIME_THREADS: -#if _XOPEN_REALTIME_THREADS == 0 -#error "_XOPEN_REALTIME_THREADS" -#else - return (_XOPEN_REALTIME_THREADS); -#endif - case _SC_XOPEN_SHM: - len = sizeof(lvalue); - sverrno = errno; - if (sysctlbyname("kern.ipc.shmmin", &lvalue, &len, NULL, - 0) == -1) { - errno = sverrno; - return (-1); - } - errno = sverrno; - return (1); - case _SC_XOPEN_STREAMS: - return (_XOPEN_STREAMS); - case _SC_XOPEN_UNIX: - return (_XOPEN_UNIX); -#ifdef _XOPEN_VERSION - case _SC_XOPEN_VERSION: - return (_XOPEN_VERSION); -#endif -#ifdef _XOPEN_XCU_VERSION - case _SC_XOPEN_XCU_VERSION: - return (_XOPEN_XCU_VERSION); -#endif - case _SC_SYMLOOP_MAX: - return (MAXSYMLINKS); - case _SC_RAW_SOCKETS: - return (_POSIX_RAW_SOCKETS); - case _SC_IPV6: -#if _POSIX_IPV6 == 0 - sverrno = errno; - value = socket(PF_INET6, SOCK_DGRAM, 0); - errno = sverrno; - if (value >= 0) { - close(value); - return (200112L); - } else - return (0); -#else - return (_POSIX_IPV6); -#endif - - case _SC_NPROCESSORS_CONF: - case _SC_NPROCESSORS_ONLN: - mib[0] = CTL_HW; - mib[1] = HW_NCPU; - break; - -#ifdef _SC_PHYS_PAGES - case _SC_PHYS_PAGES: - len = sizeof(lvalue); - if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1) - return (-1); - return (lvalue); -#endif - - default: - errno = EINVAL; - return (-1); - } - len = sizeof(value); - if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) - value = -1; - return ((long)value); -} |
