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newlib-cygwin/winsup/utils/getconf.c

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/*-
* Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
* Copyright (c) 2011 Red Hat, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by J.T. Conklin.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <error.h>
#include <errno.h>
#include <limits.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
struct conf_variable
{
const char *name;
enum { SYSCONF, CONFSTR, PATHCONF, CONSTANT } type;
long long value;
};
static const struct conf_variable conf_table[] =
{
/* Symbolic constants from confstr() */
{ "PATH", CONFSTR, _CS_PATH },
{ "POSIX_V7_ILP32_OFF32_CFLAGS", CONFSTR, _CS_POSIX_V7_ILP32_OFF32_CFLAGS },
{ "POSIX_V7_ILP32_OFF32_LDFLAGS", CONFSTR, _CS_POSIX_V7_ILP32_OFF32_LDFLAGS },
{ "POSIX_V7_ILP32_OFF32_LIBS", CONFSTR, _CS_POSIX_V7_ILP32_OFF32_LIBS },
{ "POSIX_V7_ILP32_OFFBIG_CFLAGS", CONFSTR, _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS },
{ "POSIX_V7_ILP32_OFFBIG_LDFLAGS", CONFSTR, _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS },
{ "POSIX_V7_ILP32_OFFBIG_LIBS", CONFSTR, _CS_POSIX_V7_ILP32_OFFBIG_LIBS },
{ "POSIX_V7_LP64_OFF64_CFLAGS", CONFSTR, _CS_POSIX_V7_LP64_OFF64_CFLAGS },
{ "POSIX_V7_LP64_OFF64_LDFLAGS", CONFSTR, _CS_POSIX_V7_LP64_OFF64_LDFLAGS },
{ "POSIX_V7_LP64_OFF64_LIBS", CONFSTR, _CS_POSIX_V7_LP64_OFF64_LIBS },
{ "POSIX_V7_LPBIG_OFFBIG_CFLAGS", CONFSTR, _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS },
{ "POSIX_V7_LPBIG_OFFBIG_LDFLAGS", CONFSTR, _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS },
{ "POSIX_V7_LPBIG_OFFBIG_LIBS", CONFSTR, _CS_POSIX_V7_LPBIG_OFFBIG_LIBS },
{ "POSIX_V7_THREADS_CFLAGS", CONFSTR, _CS_POSIX_V7_THREADS_CFLAGS },
{ "POSIX_V7_THREADS_LDFLAGS", CONFSTR, _CS_POSIX_V7_THREADS_LDFLAGS },
{ "POSIX_V7_WIDTH_RESTRICTED_ENVS", CONFSTR, _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS },
{ "POSIX_V6_ILP32_OFF32_CFLAGS", CONFSTR, _CS_POSIX_V6_ILP32_OFF32_CFLAGS },
{ "POSIX_V6_ILP32_OFF32_LDFLAGS", CONFSTR, _CS_POSIX_V6_ILP32_OFF32_LDFLAGS },
{ "POSIX_V6_ILP32_OFF32_LIBS", CONFSTR, _CS_POSIX_V6_ILP32_OFF32_LIBS },
{ "POSIX_V6_ILP32_OFFBIG_CFLAGS", CONFSTR, _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS },
{ "POSIX_V6_ILP32_OFFBIG_LDFLAGS", CONFSTR, _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS },
{ "POSIX_V6_ILP32_OFFBIG_LIBS", CONFSTR, _CS_POSIX_V6_ILP32_OFFBIG_LIBS },
{ "POSIX_V6_LP64_OFF64_CFLAGS", CONFSTR, _CS_POSIX_V6_LP64_OFF64_CFLAGS },
{ "POSIX_V6_LP64_OFF64_LDFLAGS", CONFSTR, _CS_POSIX_V6_LP64_OFF64_LDFLAGS },
{ "POSIX_V6_LP64_OFF64_LIBS", CONFSTR, _CS_POSIX_V6_LP64_OFF64_LIBS },
{ "POSIX_V6_LPBIG_OFFBIG_CFLAGS", CONFSTR, _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS },
{ "POSIX_V6_LPBIG_OFFBIG_LDFLAGS", CONFSTR, _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS },
{ "POSIX_V6_LPBIG_OFFBIG_LIBS", CONFSTR, _CS_POSIX_V6_LPBIG_OFFBIG_LIBS },
{ "POSIX_V6_WIDTH_RESTRICTED_ENVS", CONFSTR, _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS },
{ "XBS5_ILP32_OFF32_CFLAGS", CONFSTR, _CS_XBS5_ILP32_OFF32_CFLAGS },
{ "XBS5_ILP32_OFF32_LDFLAGS", CONFSTR, _CS_XBS5_ILP32_OFF32_LDFLAGS },
{ "XBS5_ILP32_OFF32_LIBS", CONFSTR, _CS_XBS5_ILP32_OFF32_LIBS },
{ "XBS5_ILP32_OFF32_LINTFLAGS", CONFSTR, _CS_XBS5_ILP32_OFF32_LINTFLAGS },
{ "XBS5_ILP32_OFFBIG_CFLAGS", CONFSTR, _CS_XBS5_ILP32_OFFBIG_CFLAGS },
{ "XBS5_ILP32_OFFBIG_LDFLAGS", CONFSTR, _CS_XBS5_ILP32_OFFBIG_LDFLAGS },
{ "XBS5_ILP32_OFFBIG_LIBS", CONFSTR, _CS_XBS5_ILP32_OFFBIG_LIBS },
{ "XBS5_ILP32_OFFBIG_LINTFLAGS", CONFSTR, _CS_XBS5_ILP32_OFFBIG_LINTFLAGS },
{ "XBS5_LP64_OFF64_CFLAGS", CONFSTR, _CS_XBS5_LP64_OFF64_CFLAGS },
{ "XBS5_LP64_OFF64_LDFLAGS", CONFSTR, _CS_XBS5_LP64_OFF64_LDFLAGS },
{ "XBS5_LP64_OFF64_LIBS", CONFSTR, _CS_XBS5_LP64_OFF64_LIBS },
{ "XBS5_LP64_OFF64_LINTFLAGS", CONFSTR, _CS_XBS5_LP64_OFF64_LINTFLAGS },
{ "XBS5_LPBIG_OFFBIG_CFLAGS", CONFSTR, _CS_XBS5_LPBIG_OFFBIG_CFLAGS },
{ "XBS5_LPBIG_OFFBIG_LDFLAGS", CONFSTR, _CS_XBS5_LPBIG_OFFBIG_LDFLAGS },
{ "XBS5_LPBIG_OFFBIG_LIBS", CONFSTR, _CS_XBS5_LPBIG_OFFBIG_LIBS },
{ "XBS5_LPBIG_OFFBIG_LINTFLAGS", CONFSTR, _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS },
{ "XBS5_WIDTH_RESTRICTED_ENVS", CONFSTR, _CS_XBS5_WIDTH_RESTRICTED_ENVS },
{ "V7_ENV", CONFSTR, _CS_V7_ENV },
{ "V6_ENV", CONFSTR, _CS_V6_ENV },
/* Symbolic constants from <limits.h> */
{ "_POSIX_AIO_LISTIO_MAX", CONSTANT, _POSIX_AIO_LISTIO_MAX },
{ "_POSIX_AIO_MAX", CONSTANT, _POSIX_AIO_MAX },
{ "_POSIX_ARG_MAX", CONSTANT, _POSIX_ARG_MAX },
{ "_POSIX_CHILD_MAX", CONSTANT, _POSIX_CHILD_MAX },
{ "_POSIX_CLOCKRES_MIN", CONSTANT, _POSIX_CLOCKRES_MIN },
{ "_POSIX_DELAYTIMER_MAX", CONSTANT, _POSIX_DELAYTIMER_MAX },
{ "_POSIX_HOST_NAME_MAX", CONSTANT, _POSIX_HOST_NAME_MAX },
{ "_POSIX_LINK_MAX", CONSTANT, _POSIX_LINK_MAX },
{ "_POSIX_LOGIN_NAME_MAX", CONSTANT, _POSIX_LOGIN_NAME_MAX },
{ "_POSIX_MAX_CANON", CONSTANT, _POSIX_MAX_CANON },
{ "_POSIX_MAX_INPUT", CONSTANT, _POSIX_MAX_INPUT },
{ "_POSIX_MQ_OPEN_MAX", CONSTANT, _POSIX_MQ_OPEN_MAX },
{ "_POSIX_MQ_PRIO_MAX", CONSTANT, _POSIX_MQ_PRIO_MAX },
{ "_POSIX_NAME_MAX", CONSTANT, _POSIX_NAME_MAX },
{ "_POSIX_NGROUPS_MAX", CONSTANT, _POSIX_NGROUPS_MAX },
{ "_POSIX_OPEN_MAX", CONSTANT, _POSIX_OPEN_MAX },
{ "_POSIX_PATH_MAX", CONSTANT, _POSIX_PATH_MAX },
{ "_POSIX_PIPE_BUF", CONSTANT, _POSIX_PIPE_BUF },
{ "_POSIX_RE_DUP_MAX", CONSTANT, _POSIX_RE_DUP_MAX },
{ "_POSIX_RTSIG_MAX", CONSTANT, _POSIX_RTSIG_MAX },
{ "_POSIX_SEM_NSEMS_MAX", CONSTANT, _POSIX_SEM_NSEMS_MAX },
{ "_POSIX_SEM_VALUE_MAX", CONSTANT, _POSIX_SEM_VALUE_MAX },
{ "_POSIX_SIGQUEUE_MAX", CONSTANT, _POSIX_SIGQUEUE_MAX },
{ "_POSIX_SSIZE_MAX", CONSTANT, _POSIX_SSIZE_MAX },
{ "_POSIX_SS_REPL_MAX", CONSTANT, _POSIX_SS_REPL_MAX },
{ "_POSIX_STREAM_MAX", CONSTANT, _POSIX_STREAM_MAX },
{ "_POSIX_SYMLINK_MAX", CONSTANT, _POSIX_SYMLINK_MAX },
{ "_POSIX_SYMLOOP_MAX", CONSTANT, _POSIX_SYMLOOP_MAX },
{ "_POSIX_THREAD_DESTRUCTOR_ITERATIONS", CONSTANT, _POSIX_THREAD_DESTRUCTOR_ITERATIONS },
{ "_POSIX_THREAD_KEYS_MAX", CONSTANT, _POSIX_THREAD_KEYS_MAX },
{ "_POSIX_THREAD_THREADS_MAX", CONSTANT, _POSIX_THREAD_THREADS_MAX },
{ "_POSIX_TIMER_MAX", CONSTANT, _POSIX_TIMER_MAX },
{ "_POSIX_TRACE_EVENT_NAME_MAX", CONSTANT, _POSIX_TRACE_EVENT_NAME_MAX },
{ "_POSIX_TRACE_NAME_MAX", CONSTANT, _POSIX_TRACE_NAME_MAX },
{ "_POSIX_TRACE_SYS_MAX", CONSTANT, _POSIX_TRACE_SYS_MAX },
{ "_POSIX_TRACE_USER_EVENT_MAX", CONSTANT, _POSIX_TRACE_USER_EVENT_MAX },
{ "_POSIX_TTY_NAME_MAX", CONSTANT, _POSIX_TTY_NAME_MAX },
{ "_POSIX_TZNAME_MAX", CONSTANT, _POSIX_TZNAME_MAX },
{ "_POSIX2_BC_BASE_MAX", CONSTANT, _POSIX2_BC_BASE_MAX },
{ "_POSIX2_BC_DIM_MAX", CONSTANT, _POSIX2_BC_DIM_MAX },
{ "_POSIX2_BC_SCALE_MAX", CONSTANT, _POSIX2_BC_SCALE_MAX },
{ "_POSIX2_BC_STRING_MAX", CONSTANT, _POSIX2_BC_STRING_MAX },
{ "_POSIX2_COLL_WEIGHTS_MAX", CONSTANT, _POSIX2_COLL_WEIGHTS_MAX },
{ "_POSIX2_EXPR_NEXT_MAX", CONSTANT, _POSIX2_EXPR_NEST_MAX },
{ "_POSIX2_LINE_MAX", CONSTANT, _POSIX2_LINE_MAX },
{ "_POSIX2_RE_DUP_MAX", CONSTANT, _POSIX2_RE_DUP_MAX },
{ "_XOPEN_IOV_MAX", CONSTANT, _XOPEN_IOV_MAX },
{ "_XOPEN_NAME_MAX", CONSTANT, _XOPEN_NAME_MAX },
{ "_XOPEN_PATH_MAX", CONSTANT, _XOPEN_PATH_MAX },
{ "CHAR_BIT", CONSTANT, CHAR_BIT },
{ "CHAR_MAX", CONSTANT, CHAR_MAX },
{ "CHAR_MIN", CONSTANT, CHAR_MIN },
{ "INT_MAX", CONSTANT, INT_MAX },
{ "INT_MIN", CONSTANT, INT_MIN },
{ "LLONG_MIN", CONSTANT, LLONG_MIN },
{ "LLONG_MAX", CONSTANT, LLONG_MAX },
{ "LONG_BIT", CONSTANT, LONG_BIT },
{ "LONG_MAX", CONSTANT, LONG_MAX },
{ "LONG_MIN", CONSTANT, LONG_MIN },
{ "MB_LEN_MAX", CONSTANT, MB_LEN_MAX },
{ "SCHAR_MAX", CONSTANT, SCHAR_MAX },
{ "SCHAR_MIN", CONSTANT, SCHAR_MIN },
{ "SHRT_MAX", CONSTANT, SHRT_MAX },
{ "SHRT_MIN", CONSTANT, SHRT_MIN },
{ "SSIZE_MAX", CONSTANT, SSIZE_MAX },
{ "UCHAR_MAX", CONSTANT, UCHAR_MAX },
{ "UINT_MAX", CONSTANT, UINT_MAX },
{ "ULLONG_MAX", CONSTANT, ULLONG_MAX },
{ "ULONG_MAX", CONSTANT, ULONG_MAX },
{ "USHRT_MAX", CONSTANT, USHRT_MAX },
{ "WORD_BIT", CONSTANT, WORD_BIT },
{ "NL_ARGMAX", CONSTANT, NL_ARGMAX },
{ "ML_LANGMAX", CONSTANT, NL_LANGMAX },
{ "NL_MSGMAX", CONSTANT, NL_MSGMAX },
{ "NL_SETMAX", CONSTANT, NL_SETMAX },
{ "NL_TEXTMAX", CONSTANT, NL_TEXTMAX },
{ "NZERO", CONSTANT, NZERO },
/* required by POSIX.1-2008 for compatibility with earlier versions */
{ "POSIX2_BC_BASE_MAX", CONSTANT, _POSIX2_BC_BASE_MAX },
{ "POSIX2_BC_DIM_MAX", CONSTANT, _POSIX2_BC_DIM_MAX },
{ "POSIX2_BC_SCALE_MAX", CONSTANT, _POSIX2_BC_SCALE_MAX },
{ "POSIX2_BC_STRING_MAX", CONSTANT, _POSIX2_BC_STRING_MAX },
{ "POSIX2_COLL_WEIGHTS_MAX", CONSTANT, _POSIX2_COLL_WEIGHTS_MAX },
{ "POSIX2_EXPR_NEXT_MAX", CONSTANT, _POSIX2_EXPR_NEST_MAX },
{ "POSIX2_LINE_MAX", CONSTANT, _POSIX2_LINE_MAX },
{ "POSIX2_RE_DUP_MAX", CONSTANT, _POSIX2_RE_DUP_MAX },
/* Variables from fpathconf() */
{ "FILESIZEBITS", PATHCONF, _PC_FILESIZEBITS },
{ "LINK_MAX", PATHCONF, _PC_LINK_MAX },
{ "MAX_CANON", PATHCONF, _PC_MAX_CANON },
{ "MAX_INPUT", PATHCONF, _PC_MAX_INPUT },
{ "NAME_MAX", PATHCONF, _PC_NAME_MAX },
{ "PATH_MAX", PATHCONF, _PC_PATH_MAX },
{ "PIPE_BUF", PATHCONF, _PC_PIPE_BUF },
{ "POSIX2_SYMLINKS", PATHCONF, _PC_2_SYMLINKS },
{ "POSIX_ALLOC_SIZE_MIN", PATHCONF, _PC_ALLOC_SIZE_MIN },
{ "POSIX_REC_INCR_XFER_SIZE", PATHCONF, _PC_REC_INCR_XFER_SIZE },
{ "POSIX_REC_MAX_XFER_SIZE", PATHCONF, _PC_REC_MAX_XFER_SIZE },
{ "POSIX_REC_MIN_XFER_SIZE", PATHCONF, _PC_REC_MIN_XFER_SIZE },
{ "POSIX_REC_XFER_ALIGN", PATHCONF, _PC_REC_XFER_ALIGN },
{ "SYMLINK_MAX", PATHCONF, _PC_SYMLINK_MAX },
{ "_POSIX_CHOWN_RESTRICTED", PATHCONF, _PC_CHOWN_RESTRICTED },
{ "_POSIX_NO_TRUNC", PATHCONF, _PC_NO_TRUNC },
{ "_POSIX_VDISABLE", PATHCONF, _PC_VDISABLE },
{ "_POSIX_ASYNC_IO", PATHCONF, _PC_ASYNC_IO },
{ "_POSIX_PRIO_IO", PATHCONF, _PC_PRIO_IO },
{ "_POSIX_SYNC_IO", PATHCONF, _PC_SYNC_IO },
{ "_POSIX_TIMESTAMP_RESOLUTION", PATHCONF, _PC_TIMESTAMP_RESOLUTION },
/* Variables from sysconf() */
{ "AIO_LISTIO_MAX", SYSCONF, _SC_AIO_LISTIO_MAX },
{ "AIO_MAX", SYSCONF, _SC_AIO_MAX },
{ "AIO_PRIO_DELTA_MAX", SYSCONF, _SC_AIO_PRIO_DELTA_MAX },
{ "ARG_MAX", SYSCONF, _SC_ARG_MAX },
{ "ATEXIT_MAX", SYSCONF, _SC_ATEXIT_MAX },
{ "BC_BASE_MAX", SYSCONF, _SC_BC_BASE_MAX },
{ "BC_DIM_MAX", SYSCONF, _SC_BC_DIM_MAX },
{ "BC_SCALE_MAX", SYSCONF, _SC_BC_SCALE_MAX },
{ "BC_STRING_MAX", SYSCONF, _SC_BC_STRING_MAX },
{ "CHILD_MAX", SYSCONF, _SC_CHILD_MAX },
{ "CLK_TCK", SYSCONF, _SC_CLK_TCK },
{ "COLL_WEIGHTS_MAX", SYSCONF, _SC_COLL_WEIGHTS_MAX },
{ "DELAYTIMER_MAX", SYSCONF, _SC_DELAYTIMER_MAX },
{ "EXPR_NEST_MAX", SYSCONF, _SC_EXPR_NEST_MAX },
{ "GETGR_R_SIZE_MAX", SYSCONF, _SC_GETGR_R_SIZE_MAX },
{ "GETPW_R_SIZE_MAX", SYSCONF, _SC_GETPW_R_SIZE_MAX },
{ "HOST_NAME_MAX", SYSCONF, _SC_HOST_NAME_MAX },
{ "IOV_MAX", SYSCONF, _SC_IOV_MAX },
{ "LINE_MAX", SYSCONF, _SC_LINE_MAX },
{ "LOGIN_NAME_MAX", SYSCONF, _SC_LOGIN_NAME_MAX },
{ "MQ_OPEN_MAX", SYSCONF, _SC_MQ_OPEN_MAX },
{ "MQ_PRIO_MAX", SYSCONF, _SC_MQ_PRIO_MAX },
{ "NGROUPS_MAX", SYSCONF, _SC_NGROUPS_MAX },
{ "OPEN_MAX", SYSCONF, _SC_OPEN_MAX },
{ "PAGE_SIZE", SYSCONF, _SC_PAGESIZE },
{ "PAGESIZE", SYSCONF, _SC_PAGESIZE },
{ "PTHREAD_DESTRUCTOR_ITERATIONS", SYSCONF, _SC_THREAD_DESTRUCTOR_ITERATIONS },
{ "PTHREAD_KEYS_MAX", SYSCONF, _SC_THREAD_KEYS_MAX },
{ "PTHREAD_STACK_MIN", SYSCONF, _SC_THREAD_STACK_MIN },
{ "PTHREAD_THREADS_MAX", SYSCONF, _SC_THREAD_THREADS_MAX },
{ "RE_DUP_MAX", SYSCONF, _SC_RE_DUP_MAX },
{ "RTSIG_MAX", SYSCONF, _SC_RTSIG_MAX },
{ "SEM_NSEMS_MAX", SYSCONF, _SC_SEM_NSEMS_MAX },
{ "SEM_VALUE_MAX", SYSCONF, _SC_SEM_VALUE_MAX },
{ "SIGQUEUE_MAX", SYSCONF, _SC_SIGQUEUE_MAX },
{ "STREAM_MAX", SYSCONF, _SC_STREAM_MAX },
{ "SYMLOOP_MAX", SYSCONF, _SC_SYMLOOP_MAX },
{ "TIMER_MAX", SYSCONF, _SC_TIMER_MAX },
{ "TTY_NAME_MAX", SYSCONF, _SC_TTY_NAME_MAX },
{ "TZNAME_MAX", SYSCONF, _SC_TZNAME_MAX },
{ "_POSIX_ADVISORY_INFO", SYSCONF, _SC_ADVISORY_INFO },
{ "_POSIX_ASYNCHRONOUS_IO", SYSCONF, _SC_ASYNCHRONOUS_IO },
{ "_POSIX_BARRIERS", SYSCONF, _SC_BARRIERS },
{ "_POSIX_CLOCK_SELECTION", SYSCONF, _SC_CLOCK_SELECTION },
{ "_POSIX_CPUTIME", SYSCONF, _SC_CPUTIME },
{ "_POSIX_FSYNC", SYSCONF, _SC_FSYNC },
{ "_POSIX_IPV6", SYSCONF, _SC_IPV6 },
{ "_POSIX_JOB_CONTROL", SYSCONF, _SC_JOB_CONTROL },
{ "_POSIX_MAPPED_FILES", SYSCONF, _SC_MAPPED_FILES },
{ "_POSIX_MEMLOCK", SYSCONF, _SC_MEMLOCK },
{ "_POSIX_MEMLOCK_RANGE", SYSCONF, _SC_MEMLOCK_RANGE },
{ "_POSIX_MEMORY_PROTECTION", SYSCONF, _SC_MEMORY_PROTECTION },
{ "_POSIX_MESSAGE_PASSING", SYSCONF, _SC_MESSAGE_PASSING },
{ "_POSIX_MONOTONIC_CLOCK", SYSCONF, _SC_MONOTONIC_CLOCK },
{ "_POSIX_PRIORITIZED_IO", SYSCONF, _SC_PRIORITIZED_IO },
{ "_POSIX_PRIORITY_SCHEDULING", SYSCONF, _SC_PRIORITY_SCHEDULING },
{ "_POSIX_RAW_SOCKETS", SYSCONF, _SC_RAW_SOCKETS },
{ "_POSIX_READER_WRITER_LOCKS", SYSCONF, _SC_READER_WRITER_LOCKS },
{ "_POSIX_REALTIME_SIGNALS", SYSCONF, _SC_REALTIME_SIGNALS },
{ "_POSIX_REGEXP", SYSCONF, _SC_REGEXP },
{ "_POSIX_SAVED_IDS", SYSCONF, _SC_SAVED_IDS },
{ "_POSIX_SEMAPHORES", SYSCONF, _SC_SEMAPHORES },
{ "_POSIX_SHARED_MEMORY_OBJECTS", SYSCONF, _SC_SHARED_MEMORY_OBJECTS },
{ "_POSIX_SHELL", SYSCONF, _SC_SHELL },
{ "_POSIX_SPAWN", SYSCONF, _SC_SPAWN },
{ "_POSIX_SPIN_LOCKS", SYSCONF, _SC_SPIN_LOCKS },
{ "_POSIX_SPORADIC_SERVER", SYSCONF, _SC_SPORADIC_SERVER },
{ "_POSIX_SS_REPL_MAX", SYSCONF, _SC_SS_REPL_MAX },
{ "_POSIX_SYNCHRONIZED_IO", SYSCONF, _SC_SYNCHRONIZED_IO },
{ "_POSIX_THREAD_ATTR_STACKADDR", SYSCONF, _SC_THREAD_ATTR_STACKADDR },
{ "_POSIX_THREAD_ATTR_STACKSIZE", SYSCONF, _SC_THREAD_ATTR_STACKSIZE },
{ "_POSIX_THREAD_CPUTIME", SYSCONF, _SC_THREAD_CPUTIME },
{ "_POSIX_THREAD_PRIO_INHERIT", SYSCONF, _SC_THREAD_PRIO_INHERIT },
{ "_POSIX_THREAD_PRIO_PROTECT", SYSCONF, _SC_THREAD_PRIO_PROTECT },
{ "_POSIX_THREAD_PRIORITY_SCHEDULING",SYSCONF, _SC_THREAD_PRIORITY_SCHEDULING },
{ "_POSIX_THREAD_PROCESS_SHARED", SYSCONF, _SC_THREAD_PROCESS_SHARED },
{ "_POSIX_THREAD_ROBUST_PRIO_INHERIT",SYSCONF, _SC_THREAD_ROBUST_PRIO_INHERIT },
{ "_POSIX_THREAD_ROBUST_PRIO_PROTECT",SYSCONF, _SC_THREAD_ROBUST_PRIO_PROTECT },
{ "_POSIX_THREAD_SAFE_FUNCTIONS", SYSCONF, _SC_THREAD_SAFE_FUNCTIONS },
{ "_POSIX_THREAD_SPORADIC_SERVER", SYSCONF, _SC_THREAD_SPORADIC_SERVER },
{ "_POSIX_THREADS", SYSCONF, _SC_THREADS },
{ "_POSIX_TIMEOUTS", SYSCONF, _SC_TIMEOUTS },
{ "_POSIX_TIMERS", SYSCONF, _SC_TIMERS },
{ "_POSIX_TRACE", SYSCONF, _SC_TRACE },
{ "_POSIX_TRACE_EVENT_FILTER", SYSCONF, _SC_TRACE_EVENT_FILTER },
{ "_POSIX_TRACE_EVENT_NAME_MAX", SYSCONF, _SC_TRACE_EVENT_NAME_MAX },
{ "_POSIX_TRACE_INHERIT", SYSCONF, _SC_TRACE_INHERIT },
{ "_POSIX_TRACE_LOG", SYSCONF, _SC_TRACE_LOG },
{ "_POSIX_TRACE_NAME_MAX", SYSCONF, _SC_TRACE_NAME_MAX },
{ "_POSIX_TRACE_SYS_MAX", SYSCONF, _SC_TRACE_SYS_MAX },
{ "_POSIX_TRACE_USER_EVENT_MAX", SYSCONF, _SC_TRACE_USER_EVENT_MAX },
{ "_POSIX_TYPED_MEMORY_OBJECTS", SYSCONF, _SC_TYPED_MEMORY_OBJECTS },
{ "_POSIX_VERSION", SYSCONF, _SC_VERSION },
{ "_POSIX_V7_ILP32_OFF32", SYSCONF, _SC_V7_ILP32_OFF32 },
{ "_POSIX_V7_ILP32_OFFBIG", SYSCONF, _SC_V7_ILP32_OFFBIG },
{ "_POSIX_V7_LP64_OFF64", SYSCONF, _SC_V7_LP64_OFF64 },
{ "_POSIX_V7_LPBIG_OFFBIG", SYSCONF, _SC_V7_LPBIG_OFFBIG },
{ "_POSIX_V6_ILP32_OFF32", SYSCONF, _SC_V6_ILP32_OFF32 },
{ "_POSIX_V6_ILP32_OFFBIG", SYSCONF, _SC_V6_ILP32_OFFBIG },
{ "_POSIX_V6_LP64_OFF64", SYSCONF, _SC_V6_LP64_OFF64 },
{ "_POSIX_V6_LPBIG_OFFBIG", SYSCONF, _SC_V6_LPBIG_OFFBIG },
{ "_POSIX2_C_BIND", SYSCONF, _SC_2_C_BIND },
{ "_POSIX2_C_DEV", SYSCONF, _SC_2_C_DEV },
{ "_POSIX2_CHAR_TERM", SYSCONF, _SC_2_CHAR_TERM },
{ "_POSIX2_FORT_DEV", SYSCONF, _SC_2_FORT_DEV },
{ "_POSIX2_FORT_RUN", SYSCONF, _SC_2_FORT_RUN },
{ "_POSIX2_LOCALEDEF", SYSCONF, _SC_2_LOCALEDEF },
{ "_POSIX2_PBS", SYSCONF, _SC_2_PBS },
{ "_POSIX2_PBS_ACCOUNTING", SYSCONF, _SC_2_PBS_ACCOUNTING },
{ "_POSIX2_PBS_CHECKPOINT", SYSCONF, _SC_2_PBS_CHECKPOINT },
{ "_POSIX2_PBS_LOCATE", SYSCONF, _SC_2_PBS_LOCATE },
{ "_POSIX2_PBS_MESSAGE", SYSCONF, _SC_2_PBS_MESSAGE },
{ "_POSIX2_PBS_TRACK", SYSCONF, _SC_2_PBS_TRACK },
{ "_POSIX2_SW_DEV", SYSCONF, _SC_2_SW_DEV },
{ "_POSIX2_UPE", SYSCONF, _SC_2_UPE },
{ "_POSIX2_VERSION", SYSCONF, _SC_2_VERSION },
{ "_XBS5_ILP32_OFF32", SYSCONF, _SC_XBS5_ILP32_OFF32 },
{ "_XBS5_ILP32_OFFBIG", SYSCONF, _SC_XBS5_ILP32_OFFBIG },
{ "_XBS5_LP64_OFF64", SYSCONF, _SC_XBS5_LP64_OFF64 },
{ "_XBS5_LPBIG_OFFBIG", SYSCONF, _SC_XBS5_LPBIG_OFFBIG },
{ "_XOPEN_CRYPT", SYSCONF, _SC_XOPEN_CRYPT },
{ "_XOPEN_ENH_I18N", SYSCONF, _SC_XOPEN_ENH_I18N },
{ "_XOPEN_LEGACY", SYSCONF, _SC_XOPEN_LEGACY },
{ "_XOPEN_REALTIME", SYSCONF, _SC_XOPEN_REALTIME },
{ "_XOPEN_REALTIME_THREADS", SYSCONF, _SC_XOPEN_REALTIME_THREADS },
{ "_XOPEN_SHM", SYSCONF, _SC_XOPEN_SHM },
{ "_XOPEN_STREAMS", SYSCONF, _SC_XOPEN_STREAMS },
{ "_XOPEN_UNIX", SYSCONF, _SC_XOPEN_UNIX },
{ "_XOPEN_UUCP", SYSCONF, _SC_XOPEN_UUCP },
{ "_XOPEN_VERSION", SYSCONF, _SC_XOPEN_VERSION },
/* for compatibility with earlier versions */
{ "POSIX2_C_BIND", SYSCONF, _SC_2_C_BIND },
{ "POSIX2_C_DEV", SYSCONF, _SC_2_C_DEV },
{ "POSIX2_CHAR_TERM", SYSCONF, _SC_2_CHAR_TERM },
{ "POSIX2_FORT_DEV", SYSCONF, _SC_2_FORT_DEV },
{ "POSIX2_FORT_RUN", SYSCONF, _SC_2_FORT_RUN },
{ "POSIX2_LOCALEDEF", SYSCONF, _SC_2_LOCALEDEF },
{ "POSIX2_PBS", SYSCONF, _SC_2_PBS },
{ "POSIX2_PBS_ACCOUNTING", SYSCONF, _SC_2_PBS_ACCOUNTING },
{ "POSIX2_PBS_CHECKPOINT", SYSCONF, _SC_2_PBS_CHECKPOINT },
{ "POSIX2_PBS_LOCATE", SYSCONF, _SC_2_PBS_LOCATE },
{ "POSIX2_PBS_MESSAGE", SYSCONF, _SC_2_PBS_MESSAGE },
{ "POSIX2_PBS_TRACK", SYSCONF, _SC_2_PBS_TRACK },
{ "POSIX2_SW_DEV", SYSCONF, _SC_2_SW_DEV },
{ "POSIX2_UPE", SYSCONF, _SC_2_UPE },
{ "POSIX2_VERSION", SYSCONF, _SC_2_VERSION },
/* implementation-specific values */
{ "_NPROCESSORS_CONF", SYSCONF, _SC_NPROCESSORS_CONF },
{ "_NPROCESSORS_ONLN", SYSCONF, _SC_NPROCESSORS_ONLN },
{ "_AVPHYS_PAGES", SYSCONF, _SC_AVPHYS_PAGES },
{ "_PHYS_PAGES", SYSCONF, _SC_PHYS_PAGES },
{ NULL, CONSTANT, 0L }
};
struct spec_variable {
const char *name;
int valid;
};
static const struct spec_variable spec_table[] = {
{ "POSIX_V7_ILP32_OFF32", 0 },
{ "POSIX_V7_ILP32_OFFBIG", 1 },
{ "POSIX_V7_LP64_OFF64", 0 },
{ "POSIX_V7_LPBIG_OFFBIG", 0 },
{ "POSIX_V6_ILP32_OFF32", 0 },
{ "POSIX_V6_ILP32_OFFBIG", 1 },
{ "POSIX_V6_LP64_OFF64", 0 },
{ "POSIX_V6_LPBIG_OFFBIG", 0 },
{ "XBS5_ILP32_OFF32", 0 },
{ "XBS5_ILP32_OFFBIG", 1 },
{ "XBS5_LP64_OFF64", 0 },
{ "XBS5_LPBIG_OFFBIG", 0 },
{ NULL, 0 },
};
static int a_flag = 0; /* list all variables */
static int v_flag = 0; /* follow given specification */
static void
print_longvar (const char *name, long long value)
{
if (a_flag)
printf ("%-35s %lld\n", name, value);
else
printf ("%lld\n", value);
}
static void
print_strvar (const char *name, const char *sval)
{
if (a_flag)
printf ("%-35s %s\n", name, sval);
else
printf ("%s\n", sval);
}
static void
printvar (const struct conf_variable *cp, const char *pathname)
{
size_t slen;
char *sval;
long val;
switch (cp->type)
{
case CONSTANT:
print_longvar (cp->name, cp->value);
break;
case CONFSTR:
errno = 0;
slen = confstr ((int) cp->value, NULL, 0);
if (slen == 0)
{
if (errno == 0)
print_strvar (cp->name, "undefined");
return;
}
if ((sval = malloc (slen)) == NULL)
error (EXIT_FAILURE, 0, "Can't allocate %zu bytes", slen);
errno = 0;
if (confstr ((int) cp->value, sval, slen) == 0)
print_strvar (cp->name, "undefined");
else
print_strvar (cp->name, sval);
free (sval);
break;
case SYSCONF:
errno = 0;
if ((val = sysconf ((int) cp->value)) == -1)
{
if (a_flag && errno != 0)
return; /* Just skip invalid variables */
print_strvar (cp->name, "undefined");
}
else
print_longvar (cp->name, val);
break;
case PATHCONF:
errno = 0;
if ((val = pathconf (pathname, (int) cp->value)) == -1)
{
if (a_flag && errno != 0)
return; /* Just skip invalid variables */
print_strvar (cp->name, "undefined");
}
else
print_longvar (cp->name, val);
break;
}
}
static void
usage (void)
{
fprintf (stderr,
"Usage: %s [-v specification] variable_name [pathname]\n"
" %s -a [pathname]\n",
program_invocation_short_name, program_invocation_short_name);
exit (EXIT_FAILURE);
}
int
main (int argc, char **argv)
{
int ch;
const struct conf_variable *cp;
const struct spec_variable *sp;
const char *varname, *pathname;
int found;
setlocale (LC_ALL, "");
while ((ch = getopt (argc, argv, "av")) != -1)
{
switch (ch)
{
case 'a':
a_flag = 1;
break;
case 'v':
v_flag = 1;
break;
case '?':
default:
usage ();
}
}
argc -= optind;
argv += optind;
if (v_flag)
{
if (a_flag || argc < 2)
usage ();
for (sp = spec_table; sp->name != NULL; sp++)
{
if (strcmp (argv[0], sp->name) == 0)
{
if (sp->valid != 1)
error (EXIT_FAILURE, 0, "unsupported specification \"%s\"", argv[0]);
break;
}
}
if (sp->name == NULL)
error (EXIT_FAILURE, 0, "unknown specification \"%s\"", argv[0]);
argc--;
argv++;
}
if (!a_flag)
{
if (argc == 0)
usage ();
varname = argv[0];
argc--;
argv++;
}
else
varname = NULL;
if (argc > 1)
usage ();
pathname = argv[0]; /* may be NULL */
found = 0;
for (cp = conf_table; cp->name != NULL; cp++)
{
if (a_flag || strcmp (varname, cp->name) == 0)
{
/* LINTED weird expression */
if ((cp->type == PATHCONF) == (pathname != NULL))
{
printvar (cp, pathname);
found = 1;
}
else if (!a_flag)
usage ();
}
}
if (!a_flag && !found)
error (EXIT_FAILURE, 0, "Unrecognized variable `%s'", varname);
fflush (stdout);
return ferror (stdout) ? EXIT_FAILURE : EXIT_SUCCESS;
}
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