getconf.c revision 1.7
1 /* $NetBSD: getconf.c,v 1.7 1998/05/24 20:12:28 kleink Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by J.T. Conklin. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __RCSID("$NetBSD: getconf.c,v 1.7 1998/05/24 20:12:28 kleink Exp $"); 42 #endif /* not lint */ 43 44 #include <err.h> 45 #include <errno.h> 46 #include <limits.h> 47 #include <locale.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <unistd.h> 51 52 int main __P((int, char **)); 53 static void usage __P((void)); 54 55 struct conf_variable 56 { 57 const char *name; 58 enum { SYSCONF, CONFSTR, PATHCONF, CONSTANT } type; 59 long value; 60 }; 61 62 const struct conf_variable conf_table[] = 63 { 64 { "PATH", CONFSTR, _CS_PATH }, 65 66 /* Utility Limit Minimum Values */ 67 { "POSIX2_BC_BASE_MAX", CONSTANT, _POSIX2_BC_BASE_MAX }, 68 { "POSIX2_BC_DIM_MAX", CONSTANT, _POSIX2_BC_DIM_MAX }, 69 { "POSIX2_BC_SCALE_MAX", CONSTANT, _POSIX2_BC_SCALE_MAX }, 70 { "POSIX2_BC_STRING_MAX", CONSTANT, _POSIX2_BC_STRING_MAX }, 71 { "POSIX2_COLL_WEIGHTS_MAX", CONSTANT, _POSIX2_COLL_WEIGHTS_MAX }, 72 { "POSIX2_EXPR_NEST_MAX", CONSTANT, _POSIX2_EXPR_NEST_MAX }, 73 { "POSIX2_LINE_MAX", CONSTANT, _POSIX2_LINE_MAX }, 74 { "POSIX2_RE_DUP_MAX", CONSTANT, _POSIX2_RE_DUP_MAX }, 75 { "POSIX2_VERSION", CONSTANT, _POSIX2_VERSION }, 76 77 /* POSIX.1 Minimum Values */ 78 { "_POSIX_ARG_MAX", CONSTANT, _POSIX_ARG_MAX }, 79 { "_POSIX_CHILD_MAX", CONSTANT, _POSIX_CHILD_MAX }, 80 { "_POSIX_LINK_MAX", CONSTANT, _POSIX_LINK_MAX }, 81 { "_POSIX_MAX_CANON", CONSTANT, _POSIX_MAX_CANON }, 82 { "_POSIX_MAX_INPUT", CONSTANT, _POSIX_MAX_INPUT }, 83 { "_POSIX_NAME_MAX", CONSTANT, _POSIX_NAME_MAX }, 84 { "_POSIX_NGROUPS_MAX", CONSTANT, _POSIX_NGROUPS_MAX }, 85 { "_POSIX_OPEN_MAX", CONSTANT, _POSIX_OPEN_MAX }, 86 { "_POSIX_PATH_MAX", CONSTANT, _POSIX_PIPE_BUF }, 87 { "_POSIX_PIPE_BUF", CONSTANT, _POSIX_PIPE_BUF }, 88 { "_POSIX_SSIZE_MAX", CONSTANT, _POSIX_SSIZE_MAX }, 89 { "_POSIX_STREAM_MAX", CONSTANT, _POSIX_STREAM_MAX }, 90 { "_POSIX_TZNAME_MAX", CONSTANT, _POSIX_TZNAME_MAX }, 91 92 /* Symbolic Utility Limits */ 93 { "BC_BASE_MAX", SYSCONF, _SC_BC_BASE_MAX }, 94 { "BC_DIM_MAX", SYSCONF, _SC_BC_DIM_MAX }, 95 { "BC_SCALE_MAX", SYSCONF, _SC_BC_SCALE_MAX }, 96 { "BC_STRING_MAX", SYSCONF, _SC_BC_STRING_MAX }, 97 { "COLL_WEIGHTS_MAX", SYSCONF, _SC_COLL_WEIGHTS_MAX }, 98 { "EXPR_NEST_MAX", SYSCONF, _SC_EXPR_NEST_MAX }, 99 { "LINE_MAX", SYSCONF, _SC_LINE_MAX }, 100 { "RE_DUP_MAX", SYSCONF, _SC_RE_DUP_MAX }, 101 102 /* Optional Facility Configuration Values */ 103 #if 0 104 { "POSIX2_C_BIND", SYSCONF, ??? }, 105 #endif 106 { "POSIX2_C_DEV", SYSCONF, _SC_2_C_DEV }, 107 { "POSIX2_CHAR_TERM", SYSCONF, _SC_2_CHAR_TERM }, 108 { "POSIX2_FORT_DEV", SYSCONF, _SC_2_FORT_DEV }, 109 { "POSIX2_FORT_RUN", SYSCONF, _SC_2_FORT_RUN }, 110 { "POSIX2_LOCALEDEF", SYSCONF, _SC_2_LOCALEDEF }, 111 { "POSIX2_SW_DEV", SYSCONF, _SC_2_SW_DEV }, 112 { "POSIX2_UPE", SYSCONF, _SC_2_UPE }, 113 114 /* POSIX.1 Configurable System Variables */ 115 { "ARG_MAX", SYSCONF, _SC_ARG_MAX }, 116 { "CHILD_MAX", SYSCONF, _SC_CHILD_MAX }, 117 { "CLK_TCK", SYSCONF, _SC_CLK_TCK }, 118 { "NGROUPS_MAX", SYSCONF, _SC_NGROUPS_MAX }, 119 { "OPEN_MAX", SYSCONF, _SC_OPEN_MAX }, 120 { "STREAM_MAX", SYSCONF, _SC_STREAM_MAX }, 121 { "TZNAME_MAX", SYSCONF, _SC_TZNAME_MAX }, 122 { "_POSIX_JOB_CONTROL", SYSCONF, _SC_JOB_CONTROL }, 123 { "_POSIX_SAVED_IDS", SYSCONF, _SC_SAVED_IDS }, 124 { "_POSIX_VERSION", SYSCONF, _SC_VERSION }, 125 126 { "LINK_MAX", PATHCONF, _PC_LINK_MAX }, 127 { "MAX_CANON", PATHCONF, _PC_MAX_CANON }, 128 { "MAX_INPUT", PATHCONF, _PC_MAX_INPUT }, 129 { "NAME_MAX", PATHCONF, _PC_NAME_MAX }, 130 { "PATH_MAX", PATHCONF, _PC_PATH_MAX }, 131 { "PIPE_BUF", PATHCONF, _PC_PIPE_BUF }, 132 { "_POSIX_CHOWN_RESTRICTED", PATHCONF, _PC_CHOWN_RESTRICTED }, 133 { "_POSIX_NO_TRUNC", PATHCONF, _PC_NO_TRUNC }, 134 { "_POSIX_VDISABLE", PATHCONF, _PC_VDISABLE }, 135 136 /* POSIX.1.b Configurable System Variables */ 137 { "_POSIX_FSYNC", SYSCONF, _SC_FSYNC }, 138 { "PAGESIZE", SYSCONF, _SC_PAGESIZE }, 139 140 /* XPG4.2 Configurable System Variables */ 141 { "_XOPEN_SHM", SYSCONF, _SC_XOPEN_SHM }, 142 143 /* X/Open Spec 1170 Configurable System Variables. */ 144 { "PAGE_SIZE", SYSCONF, _SC_PAGE_SIZE }, 145 { NULL } 146 }; 147 148 149 int 150 main(argc, argv) 151 int argc; 152 char **argv; 153 { 154 int ch; 155 const struct conf_variable *cp; 156 157 long val; 158 size_t slen; 159 char * sval; 160 161 setlocale(LC_ALL, ""); 162 163 while ((ch = getopt(argc, argv, "")) != -1) { 164 switch (ch) { 165 case '?': 166 default: 167 usage(); 168 } 169 } 170 argc -= optind; 171 argv += optind; 172 173 if (argc < 1 || argc > 2) { 174 usage(); 175 /* NOTREACHED */ 176 } 177 178 for (cp = conf_table; cp->name != NULL; cp++) { 179 if (strcmp(*argv, cp->name) == 0) 180 break; 181 } 182 if (cp->name == NULL) { 183 errx(1, "%s: unknown variable", *argv); 184 /* NOTREACHED */ 185 } 186 187 if (cp->type == PATHCONF) { 188 if (argc != 2) usage(); 189 } else { 190 if (argc != 1) usage(); 191 } 192 193 switch (cp->type) { 194 case CONSTANT: 195 printf("%ld\n", cp->value); 196 break; 197 198 case CONFSTR: 199 slen = confstr (cp->value, (char *) 0, (size_t) 0); 200 201 if ((sval = malloc(slen)) == NULL) 202 err(1, "malloc"); 203 204 confstr(cp->value, sval, slen); 205 printf("%s\n", sval); 206 break; 207 208 case SYSCONF: 209 errno = 0; 210 if ((val = sysconf(cp->value)) == -1) { 211 if (errno != 0) { 212 err(1, "malloc"); 213 /* NOTREACHED */ 214 } 215 216 printf ("undefined\n"); 217 } else { 218 printf("%ld\n", val); 219 } 220 break; 221 222 case PATHCONF: 223 errno = 0; 224 if ((val = pathconf(argv[1], cp->value)) == -1) { 225 if (errno != 0) { 226 err(1, "%s", argv[1]); 227 /* NOTREACHED */ 228 } 229 230 printf ("undefined\n"); 231 } else { 232 printf ("%ld\n", val); 233 } 234 break; 235 } 236 237 exit (ferror(stdout)); 238 } 239 240 241 static void 242 usage() 243 { 244 fprintf (stderr, "usage: getconf system_var\n"); 245 fprintf (stderr, " getconf path_var pathname\n"); 246 exit(1); 247 } 248
Indexes created Mon Sep 22 13:09:51 GMT 2025