/* $OpenBSD: getconf.c,v 1.3 1996/06/26 05:33:43 deraadt 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Winning Strategies, Inc. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /* * POSIX.2 getconf utility * * Written by: * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc. */ #ifndef lint static char rcsid[] = "$OpenBSD: getconf.c,v 1.3 1996/06/26 05:33:43 deraadt Exp $"; #endif /* not lint */ #include <stdio.h> #include <stdlib.h> #include <limits.h> #include <locale.h> #include <unistd.h> #include <errno.h> static void usage __P((void)); struct conf_variable { const char *name; enum { SYSCONF, CONFSTR, PATHCONF, CONSTANT } type; long value; }; 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_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_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_PIPE_BUF }, { "_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 */ #if 0 { "POSIX2_C_BIND", SYSCONF, ??? }, #endif { "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 */ { "ARG_MAX", SYSCONF, _SC_ARG_MAX }, { "CHILD_MAX", SYSCONF, _SC_CHILD_MAX }, { "CLK_TCK", SYSCONF, _SC_CLK_TCK }, { "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 }, { NULL } }; int main(argc, argv) int argc; char **argv; { int ch; const struct conf_variable *cp; long val; size_t slen; char * sval; setlocale(LC_ALL, ""); while ((ch = getopt(argc, argv, "")) != -1) { switch (ch) { case '?': default: usage(); } } argc -= optind; argv += optind; if (argc < 1 || argc > 2) { usage(); /* NOTREACHED */ } for (cp = conf_table; cp->name != NULL; cp++) { if (strcmp(*argv, cp->name) == 0) break; } if (cp->name == NULL) { errx(1, "%s: unknown variable", *argv); /* NOTREACHED */ } if (cp->type == PATHCONF) { if (argc != 2) usage(); } else { if (argc != 1) usage(); } switch (cp->type) { case CONSTANT: printf("%ld\n", cp->value); break; case CONFSTR: slen = confstr (cp->value, (char *) 0, (size_t) 0); if ((sval = malloc(slen)) == NULL) err(1, NULL); confstr(cp->value, sval, slen); printf("%s\n", sval); break; case SYSCONF: errno = 0; if ((val = sysconf(cp->value)) == -1) { if (errno != 0) { err(1, NULL); /* NOTREACHED */ } printf ("undefined\n"); } else { printf("%ld\n", val); } break; case PATHCONF: errno = 0; if ((val = pathconf(argv[1], cp->value)) == -1) { if (errno != 0) { err(1, "%s", argv[1]); /* NOTREACHED */ } printf ("undefined\n"); } else { printf ("%ld\n", val); } break; } exit (ferror(stdout)); } static void usage() { fprintf (stderr, "usage: getconf system_var\n"); fprintf (stderr, " getconf path_var pathname\n"); exit(1); }