getconf.c revision 1.6
1 /* $NetBSD: getconf.c,v 1.6 1997/10/19 02:13:41 lukem 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 1.6 1997/10/19 02:13:41 lukem 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 { NULL } 137 }; 138 139 140 int 141 main(argc, argv) 142 int argc; 143 char **argv; 144 { 145 int ch; 146 const struct conf_variable *cp; 147 148 long val; 149 size_t slen; 150 char * sval; 151 152 setlocale(LC_ALL, ""); 153 154 while ((ch = getopt(argc, argv, "")) != -1) { 155 switch (ch) { 156 case '?': 157 default: 158 usage(); 159 } 160 } 161 argc -= optind; 162 argv += optind; 163 164 if (argc < 1 || argc > 2) { 165 usage(); 166 /* NOTREACHED */ 167 } 168 169 for (cp = conf_table; cp->name != NULL; cp++) { 170 if (strcmp(*argv, cp->name) == 0) 171 break; 172 } 173 if (cp->name == NULL) { 174 errx(1, "%s: unknown variable", *argv); 175 /* NOTREACHED */ 176 } 177 178 if (cp->type == PATHCONF) { 179 if (argc != 2) usage(); 180 } else { 181 if (argc != 1) usage(); 182 } 183 184 switch (cp->type) { 185 case CONSTANT: 186 printf("%ld\n", cp->value); 187 break; 188 189 case CONFSTR: 190 slen = confstr (cp->value, (char *) 0, (size_t) 0); 191 192 if ((sval = malloc(slen)) == NULL) 193 err(1, "malloc"); 194 195 confstr(cp->value, sval, slen); 196 printf("%s\n", sval); 197 break; 198 199 case SYSCONF: 200 errno = 0; 201 if ((val = sysconf(cp->value)) == -1) { 202 if (errno != 0) { 203 err(1, "malloc"); 204 /* NOTREACHED */ 205 } 206 207 printf ("undefined\n"); 208 } else { 209 printf("%ld\n", val); 210 } 211 break; 212 213 case PATHCONF: 214 errno = 0; 215 if ((val = pathconf(argv[1], cp->value)) == -1) { 216 if (errno != 0) { 217 err(1, "%s", argv[1]); 218 /* NOTREACHED */ 219 } 220 221 printf ("undefined\n"); 222 } else { 223 printf ("%ld\n", val); 224 } 225 break; 226 } 227 228 exit (ferror(stdout)); 229 } 230 231 232 static void 233 usage() 234 { 235 fprintf (stderr, "usage: getconf system_var\n"); 236 fprintf (stderr, " getconf path_var pathname\n"); 237 exit(1); 238 } 239
Indexes created Tue Sep 23 14:10:03 GMT 2025