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