Annotation of src/usr.bin/getconf/getconf.c, Revision 1.2
1.2 ! deraadt 1: /*-
! 2: * Copyright (c) 1996 The NetBSD Foundation, Inc.
1.1 deraadt 3: * All rights reserved.
4: *
1.2 ! deraadt 5: * This code is derived from software contributed to The NetBSD Foundation
! 6: * by J.T. Conklin.
! 7: *
1.1 deraadt 8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by Winning Strategies, Inc.
19: * 4. The name of the author may not be used to endorse or promote products
20: * derived from this software without specific prior written permission.
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32: */
33:
34: /*
35: * POSIX.2 getconf utility
36: *
37: * Written by:
38: * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
39: */
40:
41: #ifndef lint
1.2 ! deraadt 42: static char rcsid[] = "$Id: getconf.c,v 1.1.1.1 1995/10/18 08:45:19 deraadt Exp $";
1.1 deraadt 43: #endif /* not lint */
44:
45: #include <stdio.h>
46: #include <stdlib.h>
47: #include <limits.h>
48: #include <locale.h>
49: #include <unistd.h>
50: #include <errno.h>
51:
52: static void usage __P((void));
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 },
85: { "_POSIX_PATH_MAX", CONSTANT, _POSIX_PIPE_BUF },
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
140: main(argc, argv)
141: int argc;
142: char **argv;
143: {
144: int ch;
145: const struct conf_variable *cp;
146:
147: long val;
148: size_t slen;
149: char * sval;
150:
151: setlocale(LC_ALL, "");
152:
153: while ((ch = getopt(argc, argv, "")) != -1) {
154: switch (ch) {
155: case '?':
156: default:
157: usage();
158: }
159: }
160: argc -= optind;
161: argv += optind;
162:
163: if (argc < 1 || argc > 2) {
164: usage();
165: /* NOTREACHED */
166: }
167:
168: for (cp = conf_table; cp->name != NULL; cp++) {
169: if (strcmp(*argv, cp->name) == 0)
170: break;
171: }
172: if (cp->name == NULL) {
1.2 ! deraadt 173: errx(1, "%s: unknown variable", *argv);
1.1 deraadt 174: /* NOTREACHED */
175: }
176:
177: if (cp->type == PATHCONF) {
178: if (argc != 2) usage();
179: } else {
180: if (argc != 1) usage();
181: }
182:
183: switch (cp->type) {
184: case CONSTANT:
185: printf("%ld\n", cp->value);
186: break;
187:
188: case CONFSTR:
189: slen = confstr (cp->value, (char *) 0, (size_t) 0);
190:
191: if ((sval = malloc(slen)) == NULL)
192: err(1, NULL);
193:
194: confstr(cp->value, sval, slen);
195: printf("%s\n", sval);
196: break;
197:
198: case SYSCONF:
199: errno = 0;
200: if ((val = sysconf(cp->value)) == -1) {
201: if (errno != 0) {
202: err(1, NULL);
203: /* NOTREACHED */
204: }
205:
206: printf ("undefined\n");
207: } else {
208: printf("%ld\n", val);
209: }
210: break;
211:
212: case PATHCONF:
213: errno = 0;
214: if ((val = pathconf(argv[1], cp->value)) == -1) {
215: if (errno != 0) {
216: err(1, "%s", argv[1]);
217: /* NOTREACHED */
218: }
219:
220: printf ("undefined\n");
221: } else {
222: printf ("%ld\n", val);
223: }
224: break;
225: }
226:
227: exit (ferror(stdout));
228: }
229:
230:
231: static void
232: usage()
233: {
234: fprintf (stderr, "usage: getconf system_var\n");
235: fprintf (stderr, " getconf path_var pathname\n");
236: exit(1);
237: }
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