343 lines
11 KiB
C
343 lines
11 KiB
C
/* $NetBSD: getconf.c,v 1.35 2013/12/19 19:11:50 rmind Exp $ */
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/*-
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* Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by J.T. Conklin.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: getconf.c,v 1.35 2013/12/19 19:11:50 rmind Exp $");
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#endif /* not lint */
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#include <err.h>
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#include <errno.h>
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#include <limits.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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struct conf_variable
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{
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const char *name;
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enum { SYSCONF, CONFSTR, PATHCONF, CONSTANT } type;
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long value;
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};
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static void print_longvar(const char *, long);
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static void print_strvar(const char *, const char *);
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static void printvar(const struct conf_variable *, const char *);
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static void usage(void) __dead;
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static const struct conf_variable conf_table[] =
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{
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{ "PATH", CONFSTR, _CS_PATH },
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/* Utility Limit Minimum Values */
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{ "POSIX2_BC_BASE_MAX", CONSTANT, _POSIX2_BC_BASE_MAX },
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{ "POSIX2_BC_DIM_MAX", CONSTANT, _POSIX2_BC_DIM_MAX },
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{ "POSIX2_BC_SCALE_MAX", CONSTANT, _POSIX2_BC_SCALE_MAX },
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{ "POSIX2_BC_STRING_MAX", CONSTANT, _POSIX2_BC_STRING_MAX },
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{ "POSIX2_COLL_WEIGHTS_MAX", CONSTANT, _POSIX2_COLL_WEIGHTS_MAX },
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{ "POSIX2_EXPR_NEST_MAX", CONSTANT, _POSIX2_EXPR_NEST_MAX },
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{ "POSIX2_LINE_MAX", CONSTANT, _POSIX2_LINE_MAX },
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{ "POSIX2_RE_DUP_MAX", CONSTANT, _POSIX2_RE_DUP_MAX },
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{ "POSIX2_VERSION", CONSTANT, _POSIX2_VERSION },
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/* POSIX.1 Minimum Values */
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{ "_POSIX_AIO_LISTIO_MAX", CONSTANT, _POSIX_AIO_LISTIO_MAX },
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{ "_POSIX_AIO_MAX", CONSTANT, _POSIX_AIO_MAX },
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{ "_POSIX_ARG_MAX", CONSTANT, _POSIX_ARG_MAX },
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{ "_POSIX_CHILD_MAX", CONSTANT, _POSIX_CHILD_MAX },
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{ "_POSIX_LINK_MAX", CONSTANT, _POSIX_LINK_MAX },
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{ "_POSIX_MAX_CANON", CONSTANT, _POSIX_MAX_CANON },
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{ "_POSIX_MAX_INPUT", CONSTANT, _POSIX_MAX_INPUT },
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{ "_POSIX_MQ_OPEN_MAX", CONSTANT, _POSIX_MQ_OPEN_MAX },
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{ "_POSIX_MQ_PRIO_MAX", CONSTANT, _POSIX_MQ_PRIO_MAX },
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{ "_POSIX_NAME_MAX", CONSTANT, _POSIX_NAME_MAX },
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{ "_POSIX_NGROUPS_MAX", CONSTANT, _POSIX_NGROUPS_MAX },
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{ "_POSIX_OPEN_MAX", CONSTANT, _POSIX_OPEN_MAX },
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{ "_POSIX_PATH_MAX", CONSTANT, _POSIX_PATH_MAX },
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{ "_POSIX_PIPE_BUF", CONSTANT, _POSIX_PIPE_BUF },
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{ "_POSIX_SSIZE_MAX", CONSTANT, _POSIX_SSIZE_MAX },
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{ "_POSIX_STREAM_MAX", CONSTANT, _POSIX_STREAM_MAX },
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{ "_POSIX_TZNAME_MAX", CONSTANT, _POSIX_TZNAME_MAX },
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/* Symbolic Utility Limits */
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{ "BC_BASE_MAX", SYSCONF, _SC_BC_BASE_MAX },
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{ "BC_DIM_MAX", SYSCONF, _SC_BC_DIM_MAX },
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{ "BC_SCALE_MAX", SYSCONF, _SC_BC_SCALE_MAX },
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{ "BC_STRING_MAX", SYSCONF, _SC_BC_STRING_MAX },
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{ "COLL_WEIGHTS_MAX", SYSCONF, _SC_COLL_WEIGHTS_MAX },
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{ "EXPR_NEST_MAX", SYSCONF, _SC_EXPR_NEST_MAX },
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{ "LINE_MAX", SYSCONF, _SC_LINE_MAX },
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{ "RE_DUP_MAX", SYSCONF, _SC_RE_DUP_MAX },
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/* Optional Facility Configuration Values */
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{ "_POSIX2_C_BIND", SYSCONF, _SC_2_C_BIND },
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{ "POSIX2_C_DEV", SYSCONF, _SC_2_C_DEV },
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{ "POSIX2_CHAR_TERM", SYSCONF, _SC_2_CHAR_TERM },
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{ "POSIX2_FORT_DEV", SYSCONF, _SC_2_FORT_DEV },
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{ "POSIX2_FORT_RUN", SYSCONF, _SC_2_FORT_RUN },
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{ "POSIX2_LOCALEDEF", SYSCONF, _SC_2_LOCALEDEF },
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{ "POSIX2_SW_DEV", SYSCONF, _SC_2_SW_DEV },
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{ "POSIX2_UPE", SYSCONF, _SC_2_UPE },
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/* POSIX.1 Configurable System Variables */
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{ "AIO_LISTIO_MAX", SYSCONF, _SC_AIO_LISTIO_MAX },
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{ "AIO_MAX", SYSCONF, _SC_AIO_MAX },
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{ "ARG_MAX", SYSCONF, _SC_ARG_MAX },
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{ "CHILD_MAX", SYSCONF, _SC_CHILD_MAX },
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{ "CLK_TCK", SYSCONF, _SC_CLK_TCK },
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{ "MQ_OPEN_MAX", SYSCONF, _SC_MQ_OPEN_MAX },
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{ "MQ_PRIO_MAX", SYSCONF, _SC_MQ_PRIO_MAX },
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{ "NGROUPS_MAX", SYSCONF, _SC_NGROUPS_MAX },
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{ "OPEN_MAX", SYSCONF, _SC_OPEN_MAX },
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{ "STREAM_MAX", SYSCONF, _SC_STREAM_MAX },
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{ "TZNAME_MAX", SYSCONF, _SC_TZNAME_MAX },
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{ "_POSIX_JOB_CONTROL", SYSCONF, _SC_JOB_CONTROL },
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{ "_POSIX_SAVED_IDS", SYSCONF, _SC_SAVED_IDS },
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{ "_POSIX_VERSION", SYSCONF, _SC_VERSION },
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{ "LINK_MAX", PATHCONF, _PC_LINK_MAX },
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{ "MAX_CANON", PATHCONF, _PC_MAX_CANON },
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{ "MAX_INPUT", PATHCONF, _PC_MAX_INPUT },
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{ "NAME_MAX", PATHCONF, _PC_NAME_MAX },
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{ "PATH_MAX", PATHCONF, _PC_PATH_MAX },
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{ "PIPE_BUF", PATHCONF, _PC_PIPE_BUF },
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{ "_POSIX_CHOWN_RESTRICTED", PATHCONF, _PC_CHOWN_RESTRICTED },
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{ "_POSIX_NO_TRUNC", PATHCONF, _PC_NO_TRUNC },
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{ "_POSIX_VDISABLE", PATHCONF, _PC_VDISABLE },
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/* POSIX.1b Configurable System Variables */
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{ "PAGESIZE", SYSCONF, _SC_PAGESIZE },
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{ "_POSIX_ASYNCHRONOUS_IO", SYSCONF, _SC_ASYNCHRONOUS_IO },
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{ "_POSIX_FSYNC", SYSCONF, _SC_FSYNC },
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{ "_POSIX_MAPPED_FILES", SYSCONF, _SC_MAPPED_FILES },
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{ "_POSIX_MEMLOCK", SYSCONF, _SC_MEMLOCK },
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{ "_POSIX_MEMLOCK_RANGE", SYSCONF, _SC_MEMLOCK_RANGE },
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{ "_POSIX_MEMORY_PROTECTION", SYSCONF, _SC_MEMORY_PROTECTION },
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{ "_POSIX_MESSAGE_PASSING", SYSCONF, _SC_MESSAGE_PASSING },
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{ "_POSIX_MONOTONIC_CLOCK", SYSCONF, _SC_MONOTONIC_CLOCK },
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{ "_POSIX_PRIORITY_SCHEDULING", SYSCONF, _SC_PRIORITY_SCHEDULING },
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{ "_POSIX_SEMAPHORES", SYSCONF, _SC_SEMAPHORES },
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{ "_POSIX_SHARED_MEMORY_OBJECTS", SYSCONF, _SC_SHARED_MEMORY_OBJECTS },
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{ "_POSIX_SYNCHRONIZED_IO", SYSCONF, _SC_SYNCHRONIZED_IO },
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{ "_POSIX_TIMERS", SYSCONF, _SC_TIMERS },
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{ "_POSIX_SYNC_IO", PATHCONF, _PC_SYNC_IO },
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/* POSIX.1c Configurable System Variables */
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{ "LOGIN_NAME_MAX", SYSCONF, _SC_LOGIN_NAME_MAX },
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{ "_POSIX_THREADS", SYSCONF, _SC_THREADS },
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/* POSIX.1j Configurable System Variables */
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{ "_POSIX_BARRIERS", SYSCONF, _SC_BARRIERS },
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{ "_POSIX_READER_WRITER_LOCKS", SYSCONF, _SC_READER_WRITER_LOCKS },
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{ "_POSIX_SPIN_LOCKS", SYSCONF, _SC_SPIN_LOCKS },
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/* XPG4.2 Configurable System Variables */
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{ "IOV_MAX", SYSCONF, _SC_IOV_MAX },
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{ "PAGE_SIZE", SYSCONF, _SC_PAGE_SIZE },
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{ "_XOPEN_SHM", SYSCONF, _SC_XOPEN_SHM },
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/* X/Open CAE Spec. Issue 5 Version 2 Configurable System Variables */
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{ "FILESIZEBITS", PATHCONF, _PC_FILESIZEBITS },
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/* POSIX.1-2001 XSI Option Group Configurable System Variables */
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{ "ATEXIT_MAX", SYSCONF, _SC_ATEXIT_MAX },
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/* POSIX.1-2001 TSF Configurable System Variables */
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{ "GETGR_R_SIZE_MAX", SYSCONF, _SC_GETGR_R_SIZE_MAX },
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{ "GETPW_R_SIZE_MAX", SYSCONF, _SC_GETPW_R_SIZE_MAX },
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#ifdef _NETBSD_SOURCE
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/* Commonly provided extensions */
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{ "NPROCESSORS_CONF", SYSCONF, _SC_NPROCESSORS_CONF },
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{ "NPROCESSORS_ONLN", SYSCONF, _SC_NPROCESSORS_ONLN },
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#endif /* _NETBSD_SOURCE */
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{ NULL, CONSTANT, 0L }
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};
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static int a_flag = 0; /* list all variables */
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int
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main(int argc, char **argv)
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{
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int ch;
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const struct conf_variable *cp;
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const char *varname, *pathname;
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int found;
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setprogname(argv[0]);
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(void)setlocale(LC_ALL, "");
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while ((ch = getopt(argc, argv, "a")) != -1) {
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switch (ch) {
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case 'a':
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a_flag = 1;
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break;
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case '?':
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (!a_flag) {
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if (argc == 0)
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usage();
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varname = argv[0];
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argc--;
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argv++;
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} else
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varname = NULL;
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if (argc > 1)
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usage();
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pathname = argv[0]; /* may be NULL */
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found = 0;
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for (cp = conf_table; cp->name != NULL; cp++) {
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if (a_flag || strcmp(varname, cp->name) == 0) {
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/*LINTED weird expression*/
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if ((cp->type == PATHCONF) == (pathname != NULL)) {
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printvar(cp, pathname);
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found = 1;
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} else if (!a_flag)
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errx(EXIT_FAILURE,
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"%s: invalid variable type", cp->name);
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}
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}
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if (!a_flag && !found)
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errx(EXIT_FAILURE, "%s: unknown variable", varname);
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(void)fflush(stdout);
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return ferror(stdout) ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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static void
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print_longvar(const char *name, long value)
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{
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if (a_flag)
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(void)printf("%s = %ld\n", name, value);
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else
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(void)printf("%ld\n", value);
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}
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static void
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print_strvar(const char *name, const char *sval)
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{
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if (a_flag)
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(void)printf("%s = %s\n", name, sval);
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else
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(void)printf("%s\n", sval);
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}
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static void
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printvar(const struct conf_variable *cp, const char *pathname)
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{
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size_t slen;
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char *sval;
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long val;
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switch (cp->type) {
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case CONSTANT:
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print_longvar(cp->name, cp->value);
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break;
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case CONFSTR:
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errno = 0;
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slen = confstr((int)cp->value, NULL, 0);
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if (slen == 0) {
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if (errno != 0)
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out: err(EXIT_FAILURE, "confstr(%ld)", cp->value);
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else
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print_strvar(cp->name, "undefined");
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}
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if ((sval = malloc(slen)) == NULL)
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err(EXIT_FAILURE, "Can't allocate %zu bytes", slen);
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errno = 0;
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if (confstr((int)cp->value, sval, slen) == 0) {
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if (errno != 0)
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goto out;
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else
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print_strvar(cp->name, "undefined");
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} else
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print_strvar(cp->name, sval);
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free(sval);
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break;
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case SYSCONF:
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errno = 0;
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if ((val = sysconf((int)cp->value)) == -1) {
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if (errno != 0)
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err(EXIT_FAILURE, "sysconf(%ld)", cp->value);
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print_strvar(cp->name, "undefined");
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} else
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print_longvar(cp->name, val);
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break;
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case PATHCONF:
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errno = 0;
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if ((val = pathconf(pathname, (int)cp->value)) == -1) {
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if (errno != 0) {
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if (a_flag && errno == EINVAL) {
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/* Just skip invalid variables */
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return;
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}
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err(EXIT_FAILURE, "pathconf(%s, %ld)",
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pathname, cp->value);
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/* NOTREACHED */
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}
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print_strvar(cp->name, "undefined");
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} else
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print_longvar(cp->name, val);
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break;
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}
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}
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static void
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usage(void)
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{
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const char *p = getprogname();
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(void)fprintf(stderr, "Usage: %s system_var\n\t%s -a\n"
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"\t%s path_var pathname\n\t%s -a pathname\n", p, p, p, p);
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exit(EXIT_FAILURE);
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}
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