Annotation of src/usr.bin/apropos/apropos.c, Revision 1.7
1.7 ! deraadt 1: /* $OpenBSD: apropos.c,v 1.6 1997/11/30 05:30:36 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: apropos.c,v 1.5 1995/09/04 20:46:20 tls Exp $ */
3:
4: /*
5: * Copyright (c) 1987, 1993, 1994
6: * The Regents of the University of California. All rights reserved.
7: *
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 the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: static char copyright[] =
39: "@(#) Copyright (c) 1987, 1993, 1994\n\
40: The Regents of the University of California. All rights reserved.\n";
41: #endif /* not lint */
42:
43: #ifndef lint
44: #if 0
45: static char sccsid[] = "@(#)apropos.c 8.8 (Berkeley) 5/4/95";
46: #else
1.7 ! deraadt 47: static char rcsid[] = "$OpenBSD: apropos.c,v 1.6 1997/11/30 05:30:36 deraadt Exp $";
1.1 deraadt 48: #endif
49: #endif /* not lint */
50:
51: #include <sys/param.h>
52: #include <sys/queue.h>
53:
54: #include <ctype.h>
55: #include <err.h>
56: #include <limits.h>
57: #include <stdio.h>
58: #include <stdlib.h>
59: #include <string.h>
60: #include <unistd.h>
61:
62: #include "../man/config.h"
63: #include "../man/pathnames.h"
64:
65: static int *found, foundman;
66:
1.6 deraadt 67: #define MAXLINELEN 8192 /* max line handled */
68:
1.1 deraadt 69: void apropos __P((char **, char *, int));
70: void lowstr __P((char *, char *));
71: int match __P((char *, char *));
72: void usage __P((void));
73:
74: int
75: main(argc, argv)
76: int argc;
77: char *argv[];
78: {
79: ENTRY *ep;
80: TAG *tp;
81: int ch, rv;
82: char *conffile, **p, *p_augment, *p_path;
83:
84: conffile = NULL;
85: p_augment = p_path = NULL;
1.4 millert 86: while ((ch = getopt(argc, argv, "C:M:m:P:")) != -1)
1.1 deraadt 87: switch (ch) {
88: case 'C':
89: conffile = optarg;
90: break;
91: case 'M':
92: case 'P': /* backward compatible */
93: p_path = optarg;
94: break;
95: case 'm':
96: p_augment = optarg;
97: break;
98: case '?':
99: default:
100: usage();
101: }
102: argv += optind;
103: argc -= optind;
104:
105: if (argc < 1)
106: usage();
107:
108: if ((found = malloc((u_int)argc * sizeof(int))) == NULL)
109: err(1, NULL);
110: memset(found, 0, argc * sizeof(int));
111:
112: for (p = argv; *p; ++p) /* convert to lower-case */
113: lowstr(*p, *p);
114:
115: if (p_augment)
116: apropos(argv, p_augment, 1);
117: if (p_path || (p_path = getenv("MANPATH")))
118: apropos(argv, p_path, 1);
119: else {
120: config(conffile);
121: ep = (tp = getlist("_whatdb")) == NULL ?
122: NULL : tp->list.tqh_first;
123: for (; ep != NULL; ep = ep->q.tqe_next)
124: apropos(argv, ep->s, 0);
125: }
126:
127: if (!foundman)
128: errx(1, "no %s file found", _PATH_WHATIS);
129:
130: rv = 1;
131: for (p = argv; *p; ++p)
132: if (found[p - argv])
133: rv = 0;
134: else
135: (void)printf("%s: nothing appropriate\n", *p);
136: exit(rv);
137: }
138:
139: void
140: apropos(argv, path, buildpath)
141: char **argv, *path;
142: int buildpath;
143: {
144: char *end, *name, **p;
1.6 deraadt 145: char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1];
146: char hold[MAXPATHLEN];
1.1 deraadt 147:
148: for (name = path; name; name = end) { /* through name list */
1.5 deraadt 149: if ((end = strchr(name, ':')))
1.1 deraadt 150: *end++ = '\0';
151:
152: if (buildpath) {
1.3 downsj 153: (void)snprintf(hold, sizeof(hold), "%s/%s", name,
154: _PATH_WHATIS);
1.1 deraadt 155: name = hold;
156: }
157:
158: if (!freopen(name, "r", stdin))
159: continue;
160:
161: foundman = 1;
162:
163: /* for each file found */
164: while (fgets(buf, sizeof(buf), stdin)) {
165: if (!strchr(buf, '\n')) {
166: warnx("%s: line too long", name);
167: continue;
168: }
169: lowstr(buf, wbuf);
170: for (p = argv; *p; ++p)
171: if (match(wbuf, *p)) {
172: (void)printf("%s", buf);
173: found[p - argv] = 1;
174:
175: /* only print line once */
176: while (*++p)
177: if (match(wbuf, *p))
178: found[p - argv] = 1;
179: break;
180: }
181: }
182: }
183: }
184:
185: /*
186: * match --
187: * match anywhere the string appears
188: */
189: int
190: match(bp, str)
191: char *bp, *str;
192: {
193: int len;
194: char test;
195:
196: if (!*bp)
197: return (0);
198: /* backward compatible: everything matches empty string */
199: if (!*str)
200: return (1);
201: for (test = *str++, len = strlen(str); *bp;)
202: if (test == *bp++ && !strncmp(bp, str, len))
203: return (1);
204: return (0);
205: }
206:
207: /*
208: * lowstr --
209: * convert a string to lower case
210: */
211: void
212: lowstr(from, to)
213: char *from, *to;
214: {
215: char ch;
216:
217: while ((ch = *from++) && ch != '\n')
218: *to++ = isupper(ch) ? tolower(ch) : ch;
219: *to = '\0';
220: }
221:
222: /*
223: * usage --
224: * print usage message and die
225: */
226: void
227: usage()
228: {
229:
230: (void)fprintf(stderr,
1.7 ! deraadt 231: "usage: apropos [-C file] [-M path] [-m path] keyword [...]\n");
1.1 deraadt 232: exit(1);
233: }
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