Annotation of src/usr.bin/getconf/getconf.c, Revision 1.12
1.12 ! deraadt 1: /* $OpenBSD: getconf.c,v 1.11 2008/11/08 01:29:10 chl Exp $ */
1.3 deraadt 2:
1.2 deraadt 3: /*-
4: * Copyright (c) 1996 The NetBSD Foundation, Inc.
1.1 deraadt 5: * All rights reserved.
6: *
1.2 deraadt 7: * This code is derived from software contributed to The NetBSD Foundation
8: * by J.T. Conklin.
9: *
1.1 deraadt 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 Winning Strategies, Inc.
21: * 4. The name of the author may not be used to endorse or promote products
22: * derived from this software without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34: */
35:
36: /*
37: * POSIX.2 getconf utility
38: *
39: * Written by:
40: * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
41: */
42:
43: #include <stdio.h>
44: #include <stdlib.h>
1.9 david 45: #include <string.h>
1.1 deraadt 46: #include <limits.h>
47: #include <locale.h>
48: #include <unistd.h>
1.5 deraadt 49: #include <err.h>
1.1 deraadt 50: #include <errno.h>
51:
1.6 millert 52: static void usage(void);
1.1 deraadt 53:
54: struct conf_variable
55: {
56: const char *name;
57: enum { SYSCONF, CONFSTR, PATHCONF, CONSTANT } type;
58: long value;
59: };
60:
61: const struct conf_variable conf_table[] =
62: {
63: { "PATH", CONFSTR, _CS_PATH },
64:
65: /* Utility Limit Minimum Values */
66: { "POSIX2_BC_BASE_MAX", CONSTANT, _POSIX2_BC_BASE_MAX },
67: { "POSIX2_BC_DIM_MAX", CONSTANT, _POSIX2_BC_DIM_MAX },
68: { "POSIX2_BC_SCALE_MAX", CONSTANT, _POSIX2_BC_SCALE_MAX },
69: { "POSIX2_BC_STRING_MAX", CONSTANT, _POSIX2_BC_STRING_MAX },
70: { "POSIX2_COLL_WEIGHTS_MAX", CONSTANT, _POSIX2_COLL_WEIGHTS_MAX },
71: { "POSIX2_EXPR_NEST_MAX", CONSTANT, _POSIX2_EXPR_NEST_MAX },
72: { "POSIX2_LINE_MAX", CONSTANT, _POSIX2_LINE_MAX },
73: { "POSIX2_RE_DUP_MAX", CONSTANT, _POSIX2_RE_DUP_MAX },
74: { "POSIX2_VERSION", CONSTANT, _POSIX2_VERSION },
75:
76: /* POSIX.1 Minimum Values */
77: { "_POSIX_ARG_MAX", CONSTANT, _POSIX_ARG_MAX },
78: { "_POSIX_CHILD_MAX", CONSTANT, _POSIX_CHILD_MAX },
79: { "_POSIX_LINK_MAX", CONSTANT, _POSIX_LINK_MAX },
80: { "_POSIX_MAX_CANON", CONSTANT, _POSIX_MAX_CANON },
81: { "_POSIX_MAX_INPUT", CONSTANT, _POSIX_MAX_INPUT },
82: { "_POSIX_NAME_MAX", CONSTANT, _POSIX_NAME_MAX },
83: { "_POSIX_NGROUPS_MAX", CONSTANT, _POSIX_NGROUPS_MAX },
84: { "_POSIX_OPEN_MAX", CONSTANT, _POSIX_OPEN_MAX },
1.7 pjanzen 85: { "_POSIX_PATH_MAX", CONSTANT, _POSIX_PATH_MAX },
1.1 deraadt 86: { "_POSIX_PIPE_BUF", CONSTANT, _POSIX_PIPE_BUF },
87: { "_POSIX_SSIZE_MAX", CONSTANT, _POSIX_SSIZE_MAX },
88: { "_POSIX_STREAM_MAX", CONSTANT, _POSIX_STREAM_MAX },
89: { "_POSIX_TZNAME_MAX", CONSTANT, _POSIX_TZNAME_MAX },
90:
91: /* Symbolic Utility Limits */
92: { "BC_BASE_MAX", SYSCONF, _SC_BC_BASE_MAX },
93: { "BC_DIM_MAX", SYSCONF, _SC_BC_DIM_MAX },
94: { "BC_SCALE_MAX", SYSCONF, _SC_BC_SCALE_MAX },
95: { "BC_STRING_MAX", SYSCONF, _SC_BC_STRING_MAX },
96: { "COLL_WEIGHTS_MAX", SYSCONF, _SC_COLL_WEIGHTS_MAX },
97: { "EXPR_NEST_MAX", SYSCONF, _SC_EXPR_NEST_MAX },
98: { "LINE_MAX", SYSCONF, _SC_LINE_MAX },
99: { "RE_DUP_MAX", SYSCONF, _SC_RE_DUP_MAX },
100:
101: /* Optional Facility Configuration Values */
102: #if 0
103: { "POSIX2_C_BIND", SYSCONF, ??? },
104: #endif
105: { "POSIX2_C_DEV", SYSCONF, _SC_2_C_DEV },
106: { "POSIX2_CHAR_TERM", SYSCONF, _SC_2_CHAR_TERM },
107: { "POSIX2_FORT_DEV", SYSCONF, _SC_2_FORT_DEV },
108: { "POSIX2_FORT_RUN", SYSCONF, _SC_2_FORT_RUN },
109: { "POSIX2_LOCALEDEF", SYSCONF, _SC_2_LOCALEDEF },
110: { "POSIX2_SW_DEV", SYSCONF, _SC_2_SW_DEV },
111: { "POSIX2_UPE", SYSCONF, _SC_2_UPE },
112:
113: /* POSIX.1 Configurable System Variables */
114: { "ARG_MAX", SYSCONF, _SC_ARG_MAX },
115: { "CHILD_MAX", SYSCONF, _SC_CHILD_MAX },
116: { "CLK_TCK", SYSCONF, _SC_CLK_TCK },
117: { "NGROUPS_MAX", SYSCONF, _SC_NGROUPS_MAX },
118: { "OPEN_MAX", SYSCONF, _SC_OPEN_MAX },
119: { "STREAM_MAX", SYSCONF, _SC_STREAM_MAX },
120: { "TZNAME_MAX", SYSCONF, _SC_TZNAME_MAX },
121: { "_POSIX_JOB_CONTROL", SYSCONF, _SC_JOB_CONTROL },
122: { "_POSIX_SAVED_IDS", SYSCONF, _SC_SAVED_IDS },
123: { "_POSIX_VERSION", SYSCONF, _SC_VERSION },
124:
125: { "LINK_MAX", PATHCONF, _PC_LINK_MAX },
126: { "MAX_CANON", PATHCONF, _PC_MAX_CANON },
127: { "MAX_INPUT", PATHCONF, _PC_MAX_INPUT },
128: { "NAME_MAX", PATHCONF, _PC_NAME_MAX },
129: { "PATH_MAX", PATHCONF, _PC_PATH_MAX },
130: { "PIPE_BUF", PATHCONF, _PC_PIPE_BUF },
131: { "_POSIX_CHOWN_RESTRICTED", PATHCONF, _PC_CHOWN_RESTRICTED },
132: { "_POSIX_NO_TRUNC", PATHCONF, _PC_NO_TRUNC },
133: { "_POSIX_VDISABLE", PATHCONF, _PC_VDISABLE },
134:
135: { NULL }
136: };
137:
138:
139: int
1.8 deraadt 140: main(int argc, char *argv[])
1.1 deraadt 141: {
142: int ch;
143: const struct conf_variable *cp;
144:
145: long val;
146: size_t slen;
147: char * sval;
148:
149: setlocale(LC_ALL, "");
150:
151: while ((ch = getopt(argc, argv, "")) != -1) {
152: switch (ch) {
153: case '?':
154: default:
155: usage();
156: }
157: }
158: argc -= optind;
159: argv += optind;
160:
161: if (argc < 1 || argc > 2) {
162: usage();
163: /* NOTREACHED */
164: }
165:
166: for (cp = conf_table; cp->name != NULL; cp++) {
167: if (strcmp(*argv, cp->name) == 0)
168: break;
169: }
170: if (cp->name == NULL) {
1.2 deraadt 171: errx(1, "%s: unknown variable", *argv);
1.1 deraadt 172: /* NOTREACHED */
173: }
174:
175: if (cp->type == PATHCONF) {
176: if (argc != 2) usage();
177: } else {
178: if (argc != 1) usage();
179: }
180:
181: switch (cp->type) {
182: case CONSTANT:
183: printf("%ld\n", cp->value);
184: break;
185:
186: case CONFSTR:
1.10 otto 187: errno = 0;
1.1 deraadt 188: slen = confstr (cp->value, (char *) 0, (size_t) 0);
1.10 otto 189:
190: if (slen == 0 || slen == (size_t)-1) {
191: if (errno)
1.11 chl 192: err(1, "%ld", cp->value);
1.10 otto 193: else
1.11 chl 194: errx(1, "%ld", cp->value);
1.10 otto 195: }
1.1 deraadt 196: if ((sval = malloc(slen)) == NULL)
197: err(1, NULL);
198:
199: confstr(cp->value, sval, slen);
200: printf("%s\n", sval);
201: break;
202:
203: case SYSCONF:
204: errno = 0;
205: if ((val = sysconf(cp->value)) == -1) {
206: if (errno != 0) {
207: err(1, NULL);
208: /* NOTREACHED */
209: }
210:
211: printf ("undefined\n");
212: } else {
213: printf("%ld\n", val);
214: }
215: break;
216:
217: case PATHCONF:
218: errno = 0;
219: if ((val = pathconf(argv[1], cp->value)) == -1) {
220: if (errno != 0) {
221: err(1, "%s", argv[1]);
222: /* NOTREACHED */
223: }
224:
225: printf ("undefined\n");
226: } else {
227: printf ("%ld\n", val);
228: }
229: break;
230: }
231:
232: exit (ferror(stdout));
233: }
234:
235:
236: static void
1.8 deraadt 237: usage(void)
1.1 deraadt 238: {
1.4 aaron 239: extern char *__progname;
240:
241: (void)fprintf(stderr, "usage: %s name [pathname]\n", __progname);
242: exit(1);
1.1 deraadt 243: }
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