diff options
Diffstat (limited to 'usr.bin/getconf')
-rw-r--r-- | usr.bin/getconf/getconf.1 | 94 | ||||
-rw-r--r-- | usr.bin/getconf/getconf.c | 342 |
2 files changed, 436 insertions, 0 deletions
diff --git a/usr.bin/getconf/getconf.1 b/usr.bin/getconf/getconf.1 new file mode 100644 index 0000000..520a688 --- /dev/null +++ b/usr.bin/getconf/getconf.1 @@ -0,0 +1,94 @@ +.\" $NetBSD: getconf.1,v 1.13 2014/04/13 01:45:34 snj Exp $ +.\" +.\" Copyright (c) 1996 The NetBSD Foundation, 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. +.\" +.Dd August 9, 2011 +.Dt GETCONF 1 +.Os +.Sh NAME +.Nm getconf +.Nd get configuration values +.Sh SYNOPSIS +.Nm +.Ar system_var +.Nm +.Fl a +.Nm +.Ar path_var +.Ar pathname +.Nm +.Fl a +.Ar pathname +.Sh DESCRIPTION +The +.Nm +utility writes the current value of a configurable system limit or +option variable to the standard output. +.Pp +The +.Ar system_var +argument specifies the system variable to be queried. +The names of the system variables are from +.Xr sysconf 3 +with the leading +.Dq Li _SC_ +removed. +.Pp +The +.Ar path_var +argument specifies the pathname variable to be queried for the specified +.Ar pathname +argument. +The names of the pathname variables are from +.Xr pathconf 2 +with the leading +.Dq Li _PC_ +removed. +.Pp +When invoked with the option +.Fl a , +.Nm +writes a list of all applicable variables and their values to the +standard output, in the format +.Do +.Va name += +.Va value +.Dc . +.Sh EXIT STATUS +.Ex -std +.Sh SEE ALSO +.Xr pathconf 2 , +.Xr confstr 3 , +.Xr limits 3 , +.Xr sysconf 3 +.Sh STANDARDS +The +.Nm +utility conforms to +.St -p1003.2-92 . diff --git a/usr.bin/getconf/getconf.c b/usr.bin/getconf/getconf.c new file mode 100644 index 0000000..8de472b --- /dev/null +++ b/usr.bin/getconf/getconf.c @@ -0,0 +1,342 @@ +/* $NetBSD: getconf.c,v 1.35 2013/12/19 19:11:50 rmind Exp $ */ + +/*- + * Copyright (c) 1996, 1998 The NetBSD Foundation, 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 <sys/cdefs.h> +#ifndef lint +__RCSID("$NetBSD: getconf.c,v 1.35 2013/12/19 19:11:50 rmind Exp $"); +#endif /* not lint */ + +#include <err.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 value; +}; + +static void print_longvar(const char *, long); +static void print_strvar(const char *, const char *); +static void printvar(const struct conf_variable *, const char *); +static void usage(void) __dead; + +static const struct conf_variable conf_table[] = +{ + { "PATH", CONFSTR, _CS_PATH }, + + /* Utility Limit Minimum Values */ + { "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_NEST_MAX", CONSTANT, _POSIX2_EXPR_NEST_MAX }, + { "POSIX2_LINE_MAX", CONSTANT, _POSIX2_LINE_MAX }, + { "POSIX2_RE_DUP_MAX", CONSTANT, _POSIX2_RE_DUP_MAX }, + { "POSIX2_VERSION", CONSTANT, _POSIX2_VERSION }, + + /* POSIX.1 Minimum Values */ + { "_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_LINK_MAX", CONSTANT, _POSIX_LINK_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_SSIZE_MAX", CONSTANT, _POSIX_SSIZE_MAX }, + { "_POSIX_STREAM_MAX", CONSTANT, _POSIX_STREAM_MAX }, + { "_POSIX_TZNAME_MAX", CONSTANT, _POSIX_TZNAME_MAX }, + + /* Symbolic Utility Limits */ + { "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 }, + { "COLL_WEIGHTS_MAX", SYSCONF, _SC_COLL_WEIGHTS_MAX }, + { "EXPR_NEST_MAX", SYSCONF, _SC_EXPR_NEST_MAX }, + { "LINE_MAX", SYSCONF, _SC_LINE_MAX }, + { "RE_DUP_MAX", SYSCONF, _SC_RE_DUP_MAX }, + + /* Optional Facility Configuration Values */ + { "_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_SW_DEV", SYSCONF, _SC_2_SW_DEV }, + { "POSIX2_UPE", SYSCONF, _SC_2_UPE }, + + /* POSIX.1 Configurable System Variables */ + { "AIO_LISTIO_MAX", SYSCONF, _SC_AIO_LISTIO_MAX }, + { "AIO_MAX", SYSCONF, _SC_AIO_MAX }, + { "ARG_MAX", SYSCONF, _SC_ARG_MAX }, + { "CHILD_MAX", SYSCONF, _SC_CHILD_MAX }, + { "CLK_TCK", SYSCONF, _SC_CLK_TCK }, + { "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 }, + { "STREAM_MAX", SYSCONF, _SC_STREAM_MAX }, + { "TZNAME_MAX", SYSCONF, _SC_TZNAME_MAX }, + { "_POSIX_JOB_CONTROL", SYSCONF, _SC_JOB_CONTROL }, + { "_POSIX_SAVED_IDS", SYSCONF, _SC_SAVED_IDS }, + { "_POSIX_VERSION", SYSCONF, _SC_VERSION }, + + { "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 }, + { "_POSIX_CHOWN_RESTRICTED", PATHCONF, _PC_CHOWN_RESTRICTED }, + { "_POSIX_NO_TRUNC", PATHCONF, _PC_NO_TRUNC }, + { "_POSIX_VDISABLE", PATHCONF, _PC_VDISABLE }, + + /* POSIX.1b Configurable System Variables */ + { "PAGESIZE", SYSCONF, _SC_PAGESIZE }, + { "_POSIX_ASYNCHRONOUS_IO", SYSCONF, _SC_ASYNCHRONOUS_IO }, + { "_POSIX_FSYNC", SYSCONF, _SC_FSYNC }, + { "_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_PRIORITY_SCHEDULING", SYSCONF, _SC_PRIORITY_SCHEDULING }, + { "_POSIX_SEMAPHORES", SYSCONF, _SC_SEMAPHORES }, + { "_POSIX_SHARED_MEMORY_OBJECTS", SYSCONF, _SC_SHARED_MEMORY_OBJECTS }, + { "_POSIX_SYNCHRONIZED_IO", SYSCONF, _SC_SYNCHRONIZED_IO }, + { "_POSIX_TIMERS", SYSCONF, _SC_TIMERS }, + + { "_POSIX_SYNC_IO", PATHCONF, _PC_SYNC_IO }, + + /* POSIX.1c Configurable System Variables */ + { "LOGIN_NAME_MAX", SYSCONF, _SC_LOGIN_NAME_MAX }, + { "_POSIX_THREADS", SYSCONF, _SC_THREADS }, + + /* POSIX.1j Configurable System Variables */ + { "_POSIX_BARRIERS", SYSCONF, _SC_BARRIERS }, + { "_POSIX_READER_WRITER_LOCKS", SYSCONF, _SC_READER_WRITER_LOCKS }, + { "_POSIX_SPIN_LOCKS", SYSCONF, _SC_SPIN_LOCKS }, + + /* XPG4.2 Configurable System Variables */ + { "IOV_MAX", SYSCONF, _SC_IOV_MAX }, + { "PAGE_SIZE", SYSCONF, _SC_PAGE_SIZE }, + { "_XOPEN_SHM", SYSCONF, _SC_XOPEN_SHM }, + + /* X/Open CAE Spec. Issue 5 Version 2 Configurable System Variables */ + { "FILESIZEBITS", PATHCONF, _PC_FILESIZEBITS }, + + /* POSIX.1-2001 XSI Option Group Configurable System Variables */ + { "ATEXIT_MAX", SYSCONF, _SC_ATEXIT_MAX }, + + /* POSIX.1-2001 TSF Configurable System Variables */ + { "GETGR_R_SIZE_MAX", SYSCONF, _SC_GETGR_R_SIZE_MAX }, + { "GETPW_R_SIZE_MAX", SYSCONF, _SC_GETPW_R_SIZE_MAX }, + +#ifdef _NETBSD_SOURCE + /* Commonly provided extensions */ + { "NPROCESSORS_CONF", SYSCONF, _SC_NPROCESSORS_CONF }, + { "NPROCESSORS_ONLN", SYSCONF, _SC_NPROCESSORS_ONLN }, +#endif /* _NETBSD_SOURCE */ + + { NULL, CONSTANT, 0L } +}; + +static int a_flag = 0; /* list all variables */ + +int +main(int argc, char **argv) +{ + int ch; + const struct conf_variable *cp; + const char *varname, *pathname; + int found; + + setprogname(argv[0]); + (void)setlocale(LC_ALL, ""); + + while ((ch = getopt(argc, argv, "a")) != -1) { + switch (ch) { + case 'a': + a_flag = 1; + break; + case '?': + default: + usage(); + } + } + argc -= optind; + argv += optind; + + 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) + errx(EXIT_FAILURE, + "%s: invalid variable type", cp->name); + } + } + + if (!a_flag && !found) + errx(EXIT_FAILURE, "%s: unknown variable", varname); + + (void)fflush(stdout); + return ferror(stdout) ? EXIT_FAILURE : EXIT_SUCCESS; +} + +static void +print_longvar(const char *name, long value) +{ + if (a_flag) + (void)printf("%s = %ld\n", name, value); + else + (void)printf("%ld\n", value); +} + +static void +print_strvar(const char *name, const char *sval) +{ + if (a_flag) + (void)printf("%s = %s\n", name, sval); + else + (void)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) + +out: err(EXIT_FAILURE, "confstr(%ld)", cp->value); + else + print_strvar(cp->name, "undefined"); + } + + if ((sval = malloc(slen)) == NULL) + err(EXIT_FAILURE, "Can't allocate %zu bytes", slen); + + errno = 0; + if (confstr((int)cp->value, sval, slen) == 0) { + if (errno != 0) + goto out; + else + 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 (errno != 0) + err(EXIT_FAILURE, "sysconf(%ld)", cp->value); + 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 (errno != 0) { + if (a_flag && errno == EINVAL) { + /* Just skip invalid variables */ + return; + } + err(EXIT_FAILURE, "pathconf(%s, %ld)", + pathname, cp->value); + /* NOTREACHED */ + } + + print_strvar(cp->name, "undefined"); + } else + print_longvar(cp->name, val); + break; + } +} + + +static void +usage(void) +{ + const char *p = getprogname(); + (void)fprintf(stderr, "Usage: %s system_var\n\t%s -a\n" + "\t%s path_var pathname\n\t%s -a pathname\n", p, p, p, p); + exit(EXIT_FAILURE); +} |