Annotation of src/usr.bin/getconf/getconf.c, Revision 1.1
1.1 ! deraadt 1: /*
! 2: * Copyright (c) 1994 Winning Strategies, Inc.
! 3: * All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. All advertising materials mentioning features or use of this software
! 14: * must display the following acknowledgement:
! 15: * This product includes software developed by Winning Strategies, Inc.
! 16: * 4. The name of the author may not be used to endorse or promote products
! 17: * derived from this software without specific prior written permission.
! 18: *
! 19: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 20: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 21: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 22: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 23: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 24: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 25: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 26: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 27: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 28: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 29: */
! 30:
! 31: /*
! 32: * POSIX.2 getconf utility
! 33: *
! 34: * Written by:
! 35: * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
! 36: */
! 37:
! 38: #ifndef lint
! 39: static char rcsid[] = "$Id: getconf.c,v 1.2 1994/05/10 00:04:12 jtc Exp $";
! 40: #endif /* not lint */
! 41:
! 42: #include <stdio.h>
! 43: #include <stdlib.h>
! 44: #include <limits.h>
! 45: #include <locale.h>
! 46: #include <unistd.h>
! 47: #include <errno.h>
! 48:
! 49: static void usage __P((void));
! 50:
! 51: struct conf_variable
! 52: {
! 53: const char *name;
! 54: enum { SYSCONF, CONFSTR, PATHCONF, CONSTANT } type;
! 55: long value;
! 56: };
! 57:
! 58: const struct conf_variable conf_table[] =
! 59: {
! 60: { "PATH", CONFSTR, _CS_PATH },
! 61:
! 62: /* Utility Limit Minimum Values */
! 63: { "POSIX2_BC_BASE_MAX", CONSTANT, _POSIX2_BC_BASE_MAX },
! 64: { "POSIX2_BC_DIM_MAX", CONSTANT, _POSIX2_BC_DIM_MAX },
! 65: { "POSIX2_BC_SCALE_MAX", CONSTANT, _POSIX2_BC_SCALE_MAX },
! 66: { "POSIX2_BC_STRING_MAX", CONSTANT, _POSIX2_BC_STRING_MAX },
! 67: { "POSIX2_COLL_WEIGHTS_MAX", CONSTANT, _POSIX2_COLL_WEIGHTS_MAX },
! 68: { "POSIX2_EXPR_NEST_MAX", CONSTANT, _POSIX2_EXPR_NEST_MAX },
! 69: { "POSIX2_LINE_MAX", CONSTANT, _POSIX2_LINE_MAX },
! 70: { "POSIX2_RE_DUP_MAX", CONSTANT, _POSIX2_RE_DUP_MAX },
! 71: { "POSIX2_VERSION", CONSTANT, _POSIX2_VERSION },
! 72:
! 73: /* POSIX.1 Minimum Values */
! 74: { "_POSIX_ARG_MAX", CONSTANT, _POSIX_ARG_MAX },
! 75: { "_POSIX_CHILD_MAX", CONSTANT, _POSIX_CHILD_MAX },
! 76: { "_POSIX_LINK_MAX", CONSTANT, _POSIX_LINK_MAX },
! 77: { "_POSIX_MAX_CANON", CONSTANT, _POSIX_MAX_CANON },
! 78: { "_POSIX_MAX_INPUT", CONSTANT, _POSIX_MAX_INPUT },
! 79: { "_POSIX_NAME_MAX", CONSTANT, _POSIX_NAME_MAX },
! 80: { "_POSIX_NGROUPS_MAX", CONSTANT, _POSIX_NGROUPS_MAX },
! 81: { "_POSIX_OPEN_MAX", CONSTANT, _POSIX_OPEN_MAX },
! 82: { "_POSIX_PATH_MAX", CONSTANT, _POSIX_PIPE_BUF },
! 83: { "_POSIX_PIPE_BUF", CONSTANT, _POSIX_PIPE_BUF },
! 84: { "_POSIX_SSIZE_MAX", CONSTANT, _POSIX_SSIZE_MAX },
! 85: { "_POSIX_STREAM_MAX", CONSTANT, _POSIX_STREAM_MAX },
! 86: { "_POSIX_TZNAME_MAX", CONSTANT, _POSIX_TZNAME_MAX },
! 87:
! 88: /* Symbolic Utility Limits */
! 89: { "BC_BASE_MAX", SYSCONF, _SC_BC_BASE_MAX },
! 90: { "BC_DIM_MAX", SYSCONF, _SC_BC_DIM_MAX },
! 91: { "BC_SCALE_MAX", SYSCONF, _SC_BC_SCALE_MAX },
! 92: { "BC_STRING_MAX", SYSCONF, _SC_BC_STRING_MAX },
! 93: { "COLL_WEIGHTS_MAX", SYSCONF, _SC_COLL_WEIGHTS_MAX },
! 94: { "EXPR_NEST_MAX", SYSCONF, _SC_EXPR_NEST_MAX },
! 95: { "LINE_MAX", SYSCONF, _SC_LINE_MAX },
! 96: { "RE_DUP_MAX", SYSCONF, _SC_RE_DUP_MAX },
! 97:
! 98: /* Optional Facility Configuration Values */
! 99: #if 0
! 100: { "POSIX2_C_BIND", SYSCONF, ??? },
! 101: #endif
! 102: { "POSIX2_C_DEV", SYSCONF, _SC_2_C_DEV },
! 103: { "POSIX2_CHAR_TERM", SYSCONF, _SC_2_CHAR_TERM },
! 104: { "POSIX2_FORT_DEV", SYSCONF, _SC_2_FORT_DEV },
! 105: { "POSIX2_FORT_RUN", SYSCONF, _SC_2_FORT_RUN },
! 106: { "POSIX2_LOCALEDEF", SYSCONF, _SC_2_LOCALEDEF },
! 107: { "POSIX2_SW_DEV", SYSCONF, _SC_2_SW_DEV },
! 108: { "POSIX2_UPE", SYSCONF, _SC_2_UPE },
! 109:
! 110: /* POSIX.1 Configurable System Variables */
! 111: { "ARG_MAX", SYSCONF, _SC_ARG_MAX },
! 112: { "CHILD_MAX", SYSCONF, _SC_CHILD_MAX },
! 113: { "CLK_TCK", SYSCONF, _SC_CLK_TCK },
! 114: { "NGROUPS_MAX", SYSCONF, _SC_NGROUPS_MAX },
! 115: { "OPEN_MAX", SYSCONF, _SC_OPEN_MAX },
! 116: { "STREAM_MAX", SYSCONF, _SC_STREAM_MAX },
! 117: { "TZNAME_MAX", SYSCONF, _SC_TZNAME_MAX },
! 118: { "_POSIX_JOB_CONTROL", SYSCONF, _SC_JOB_CONTROL },
! 119: { "_POSIX_SAVED_IDS", SYSCONF, _SC_SAVED_IDS },
! 120: { "_POSIX_VERSION", SYSCONF, _SC_VERSION },
! 121:
! 122: { "LINK_MAX", PATHCONF, _PC_LINK_MAX },
! 123: { "MAX_CANON", PATHCONF, _PC_MAX_CANON },
! 124: { "MAX_INPUT", PATHCONF, _PC_MAX_INPUT },
! 125: { "NAME_MAX", PATHCONF, _PC_NAME_MAX },
! 126: { "PATH_MAX", PATHCONF, _PC_PATH_MAX },
! 127: { "PIPE_BUF", PATHCONF, _PC_PIPE_BUF },
! 128: { "_POSIX_CHOWN_RESTRICTED", PATHCONF, _PC_CHOWN_RESTRICTED },
! 129: { "_POSIX_NO_TRUNC", PATHCONF, _PC_NO_TRUNC },
! 130: { "_POSIX_VDISABLE", PATHCONF, _PC_VDISABLE },
! 131:
! 132: { NULL }
! 133: };
! 134:
! 135:
! 136: int
! 137: main(argc, argv)
! 138: int argc;
! 139: char **argv;
! 140: {
! 141: int ch;
! 142: const struct conf_variable *cp;
! 143:
! 144: long val;
! 145: size_t slen;
! 146: char * sval;
! 147:
! 148: setlocale(LC_ALL, "");
! 149:
! 150: while ((ch = getopt(argc, argv, "")) != -1) {
! 151: switch (ch) {
! 152: case '?':
! 153: default:
! 154: usage();
! 155: }
! 156: }
! 157: argc -= optind;
! 158: argv += optind;
! 159:
! 160: if (argc < 1 || argc > 2) {
! 161: usage();
! 162: /* NOTREACHED */
! 163: }
! 164:
! 165: for (cp = conf_table; cp->name != NULL; cp++) {
! 166: if (strcmp(*argv, cp->name) == 0)
! 167: break;
! 168: }
! 169: if (cp->name == NULL) {
! 170: err(1, "%s: unknown variable", *argv);
! 171: /* NOTREACHED */
! 172: }
! 173:
! 174: if (cp->type == PATHCONF) {
! 175: if (argc != 2) usage();
! 176: } else {
! 177: if (argc != 1) usage();
! 178: }
! 179:
! 180: switch (cp->type) {
! 181: case CONSTANT:
! 182: printf("%ld\n", cp->value);
! 183: break;
! 184:
! 185: case CONFSTR:
! 186: slen = confstr (cp->value, (char *) 0, (size_t) 0);
! 187:
! 188: if ((sval = malloc(slen)) == NULL)
! 189: err(1, NULL);
! 190:
! 191: confstr(cp->value, sval, slen);
! 192: printf("%s\n", sval);
! 193: break;
! 194:
! 195: case SYSCONF:
! 196: errno = 0;
! 197: if ((val = sysconf(cp->value)) == -1) {
! 198: if (errno != 0) {
! 199: err(1, NULL);
! 200: /* NOTREACHED */
! 201: }
! 202:
! 203: printf ("undefined\n");
! 204: } else {
! 205: printf("%ld\n", val);
! 206: }
! 207: break;
! 208:
! 209: case PATHCONF:
! 210: errno = 0;
! 211: if ((val = pathconf(argv[1], cp->value)) == -1) {
! 212: if (errno != 0) {
! 213: err(1, "%s", argv[1]);
! 214: /* NOTREACHED */
! 215: }
! 216:
! 217: printf ("undefined\n");
! 218: } else {
! 219: printf ("%ld\n", val);
! 220: }
! 221: break;
! 222: }
! 223:
! 224: exit (ferror(stdout));
! 225: }
! 226:
! 227:
! 228: static void
! 229: usage()
! 230: {
! 231: fprintf (stderr, "usage: getconf system_var\n");
! 232: fprintf (stderr, " getconf path_var pathname\n");
! 233: exit(1);
! 234: }
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