Annotation of src/usr.bin/getconf/getconf.c, Revision 1.5
1.5 ! deraadt 1: /* $OpenBSD: getconf.c,v 1.4 2001/03/01 21:15:41 aaron 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: #ifndef lint
1.5 ! deraadt 44: static char rcsid[] = "$OpenBSD: getconf.c,v 1.4 2001/03/01 21:15:41 aaron Exp $";
1.1 deraadt 45: #endif /* not lint */
46:
47: #include <stdio.h>
48: #include <stdlib.h>
49: #include <limits.h>
50: #include <locale.h>
51: #include <unistd.h>
1.5 ! deraadt 52: #include <err.h>
1.1 deraadt 53: #include <errno.h>
54:
55: static void usage __P((void));
56:
57: struct conf_variable
58: {
59: const char *name;
60: enum { SYSCONF, CONFSTR, PATHCONF, CONSTANT } type;
61: long value;
62: };
63:
64: const struct conf_variable conf_table[] =
65: {
66: { "PATH", CONFSTR, _CS_PATH },
67:
68: /* Utility Limit Minimum Values */
69: { "POSIX2_BC_BASE_MAX", CONSTANT, _POSIX2_BC_BASE_MAX },
70: { "POSIX2_BC_DIM_MAX", CONSTANT, _POSIX2_BC_DIM_MAX },
71: { "POSIX2_BC_SCALE_MAX", CONSTANT, _POSIX2_BC_SCALE_MAX },
72: { "POSIX2_BC_STRING_MAX", CONSTANT, _POSIX2_BC_STRING_MAX },
73: { "POSIX2_COLL_WEIGHTS_MAX", CONSTANT, _POSIX2_COLL_WEIGHTS_MAX },
74: { "POSIX2_EXPR_NEST_MAX", CONSTANT, _POSIX2_EXPR_NEST_MAX },
75: { "POSIX2_LINE_MAX", CONSTANT, _POSIX2_LINE_MAX },
76: { "POSIX2_RE_DUP_MAX", CONSTANT, _POSIX2_RE_DUP_MAX },
77: { "POSIX2_VERSION", CONSTANT, _POSIX2_VERSION },
78:
79: /* POSIX.1 Minimum Values */
80: { "_POSIX_ARG_MAX", CONSTANT, _POSIX_ARG_MAX },
81: { "_POSIX_CHILD_MAX", CONSTANT, _POSIX_CHILD_MAX },
82: { "_POSIX_LINK_MAX", CONSTANT, _POSIX_LINK_MAX },
83: { "_POSIX_MAX_CANON", CONSTANT, _POSIX_MAX_CANON },
84: { "_POSIX_MAX_INPUT", CONSTANT, _POSIX_MAX_INPUT },
85: { "_POSIX_NAME_MAX", CONSTANT, _POSIX_NAME_MAX },
86: { "_POSIX_NGROUPS_MAX", CONSTANT, _POSIX_NGROUPS_MAX },
87: { "_POSIX_OPEN_MAX", CONSTANT, _POSIX_OPEN_MAX },
88: { "_POSIX_PATH_MAX", CONSTANT, _POSIX_PIPE_BUF },
89: { "_POSIX_PIPE_BUF", CONSTANT, _POSIX_PIPE_BUF },
90: { "_POSIX_SSIZE_MAX", CONSTANT, _POSIX_SSIZE_MAX },
91: { "_POSIX_STREAM_MAX", CONSTANT, _POSIX_STREAM_MAX },
92: { "_POSIX_TZNAME_MAX", CONSTANT, _POSIX_TZNAME_MAX },
93:
94: /* Symbolic Utility Limits */
95: { "BC_BASE_MAX", SYSCONF, _SC_BC_BASE_MAX },
96: { "BC_DIM_MAX", SYSCONF, _SC_BC_DIM_MAX },
97: { "BC_SCALE_MAX", SYSCONF, _SC_BC_SCALE_MAX },
98: { "BC_STRING_MAX", SYSCONF, _SC_BC_STRING_MAX },
99: { "COLL_WEIGHTS_MAX", SYSCONF, _SC_COLL_WEIGHTS_MAX },
100: { "EXPR_NEST_MAX", SYSCONF, _SC_EXPR_NEST_MAX },
101: { "LINE_MAX", SYSCONF, _SC_LINE_MAX },
102: { "RE_DUP_MAX", SYSCONF, _SC_RE_DUP_MAX },
103:
104: /* Optional Facility Configuration Values */
105: #if 0
106: { "POSIX2_C_BIND", SYSCONF, ??? },
107: #endif
108: { "POSIX2_C_DEV", SYSCONF, _SC_2_C_DEV },
109: { "POSIX2_CHAR_TERM", SYSCONF, _SC_2_CHAR_TERM },
110: { "POSIX2_FORT_DEV", SYSCONF, _SC_2_FORT_DEV },
111: { "POSIX2_FORT_RUN", SYSCONF, _SC_2_FORT_RUN },
112: { "POSIX2_LOCALEDEF", SYSCONF, _SC_2_LOCALEDEF },
113: { "POSIX2_SW_DEV", SYSCONF, _SC_2_SW_DEV },
114: { "POSIX2_UPE", SYSCONF, _SC_2_UPE },
115:
116: /* POSIX.1 Configurable System Variables */
117: { "ARG_MAX", SYSCONF, _SC_ARG_MAX },
118: { "CHILD_MAX", SYSCONF, _SC_CHILD_MAX },
119: { "CLK_TCK", SYSCONF, _SC_CLK_TCK },
120: { "NGROUPS_MAX", SYSCONF, _SC_NGROUPS_MAX },
121: { "OPEN_MAX", SYSCONF, _SC_OPEN_MAX },
122: { "STREAM_MAX", SYSCONF, _SC_STREAM_MAX },
123: { "TZNAME_MAX", SYSCONF, _SC_TZNAME_MAX },
124: { "_POSIX_JOB_CONTROL", SYSCONF, _SC_JOB_CONTROL },
125: { "_POSIX_SAVED_IDS", SYSCONF, _SC_SAVED_IDS },
126: { "_POSIX_VERSION", SYSCONF, _SC_VERSION },
127:
128: { "LINK_MAX", PATHCONF, _PC_LINK_MAX },
129: { "MAX_CANON", PATHCONF, _PC_MAX_CANON },
130: { "MAX_INPUT", PATHCONF, _PC_MAX_INPUT },
131: { "NAME_MAX", PATHCONF, _PC_NAME_MAX },
132: { "PATH_MAX", PATHCONF, _PC_PATH_MAX },
133: { "PIPE_BUF", PATHCONF, _PC_PIPE_BUF },
134: { "_POSIX_CHOWN_RESTRICTED", PATHCONF, _PC_CHOWN_RESTRICTED },
135: { "_POSIX_NO_TRUNC", PATHCONF, _PC_NO_TRUNC },
136: { "_POSIX_VDISABLE", PATHCONF, _PC_VDISABLE },
137:
138: { NULL }
139: };
140:
141:
142: int
143: main(argc, argv)
144: int argc;
145: char **argv;
146: {
147: int ch;
148: const struct conf_variable *cp;
149:
150: long val;
151: size_t slen;
152: char * sval;
153:
154: setlocale(LC_ALL, "");
155:
156: while ((ch = getopt(argc, argv, "")) != -1) {
157: switch (ch) {
158: case '?':
159: default:
160: usage();
161: }
162: }
163: argc -= optind;
164: argv += optind;
165:
166: if (argc < 1 || argc > 2) {
167: usage();
168: /* NOTREACHED */
169: }
170:
171: for (cp = conf_table; cp->name != NULL; cp++) {
172: if (strcmp(*argv, cp->name) == 0)
173: break;
174: }
175: if (cp->name == NULL) {
1.2 deraadt 176: errx(1, "%s: unknown variable", *argv);
1.1 deraadt 177: /* NOTREACHED */
178: }
179:
180: if (cp->type == PATHCONF) {
181: if (argc != 2) usage();
182: } else {
183: if (argc != 1) usage();
184: }
185:
186: switch (cp->type) {
187: case CONSTANT:
188: printf("%ld\n", cp->value);
189: break;
190:
191: case CONFSTR:
192: slen = confstr (cp->value, (char *) 0, (size_t) 0);
193:
194: if ((sval = malloc(slen)) == NULL)
195: err(1, NULL);
196:
197: confstr(cp->value, sval, slen);
198: printf("%s\n", sval);
199: break;
200:
201: case SYSCONF:
202: errno = 0;
203: if ((val = sysconf(cp->value)) == -1) {
204: if (errno != 0) {
205: err(1, NULL);
206: /* NOTREACHED */
207: }
208:
209: printf ("undefined\n");
210: } else {
211: printf("%ld\n", val);
212: }
213: break;
214:
215: case PATHCONF:
216: errno = 0;
217: if ((val = pathconf(argv[1], cp->value)) == -1) {
218: if (errno != 0) {
219: err(1, "%s", argv[1]);
220: /* NOTREACHED */
221: }
222:
223: printf ("undefined\n");
224: } else {
225: printf ("%ld\n", val);
226: }
227: break;
228: }
229:
230: exit (ferror(stdout));
231: }
232:
233:
234: static void
235: usage()
236: {
1.4 aaron 237: extern char *__progname;
238:
239: (void)fprintf(stderr, "usage: %s name [pathname]\n", __progname);
240: exit(1);
1.1 deraadt 241: }