1 /*
2 * Copyright (c) 1987, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char copyright[] =
10 "@(#) Copyright (c) 1987, 1993, 1994\n\
11 The Regents of the University of California. All rights reserved.\n";
12 #endif /* not lint */
13
14 #ifndef lint
15 static char sccsid[] = "@(#)apropos.c 8.8 (Berkeley) 05/04/95";
16 #endif /* not lint */
17
18 #include <sys/param.h>
19 #include <sys/queue.h>
20
21 #include <ctype.h>
22 #include <err.h>
23 #include <limits.h>
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <string.h>
27 #include <unistd.h>
28
29 #include "../man/config.h"
30 #include "../man/pathnames.h"
31
32 static int *found, foundman;
33
34 void apropos __P((char **, char *, int));
35 void lowstr __P((char *, char *));
36 int match __P((char *, char *));
37 void usage __P((void));
38
39 int
main(argc,argv)40 main(argc, argv)
41 int argc;
42 char *argv[];
43 {
44 ENTRY *ep;
45 TAG *tp;
46 int ch, rv;
47 char *conffile, **p, *p_augment, *p_path;
48
49 conffile = NULL;
50 p_augment = p_path = NULL;
51 while ((ch = getopt(argc, argv, "C:M:m:P:")) != EOF)
52 switch (ch) {
53 case 'C':
54 conffile = optarg;
55 break;
56 case 'M':
57 case 'P': /* backward compatible */
58 p_path = optarg;
59 break;
60 case 'm':
61 p_augment = optarg;
62 break;
63 case '?':
64 default:
65 usage();
66 }
67 argv += optind;
68 argc -= optind;
69
70 if (argc < 1)
71 usage();
72
73 if ((found = malloc((u_int)argc * sizeof(int))) == NULL)
74 err(1, NULL);
75 memset(found, 0, argc * sizeof(int));
76
77 for (p = argv; *p; ++p) /* convert to lower-case */
78 lowstr(*p, *p);
79
80 if (p_augment)
81 apropos(argv, p_augment, 1);
82 if (p_path || (p_path = getenv("MANPATH")))
83 apropos(argv, p_path, 1);
84 else {
85 config(conffile);
86 ep = (tp = getlist("_whatdb")) == NULL ?
87 NULL : tp->list.tqh_first;
88 for (; ep != NULL; ep = ep->q.tqe_next)
89 apropos(argv, ep->s, 0);
90 }
91
92 if (!foundman)
93 errx(1, "no %s file found", _PATH_WHATIS);
94
95 rv = 1;
96 for (p = argv; *p; ++p)
97 if (found[p - argv])
98 rv = 0;
99 else
100 (void)printf("%s: nothing appropriate\n", *p);
101 exit(rv);
102 }
103
104 void
apropos(argv,path,buildpath)105 apropos(argv, path, buildpath)
106 char **argv, *path;
107 int buildpath;
108 {
109 char *end, *name, **p;
110 char buf[LINE_MAX + 1], wbuf[LINE_MAX + 1];
111
112 for (name = path; name; name = end) { /* through name list */
113 if (end = strchr(name, ':'))
114 *end++ = '\0';
115
116 if (buildpath) {
117 char hold[MAXPATHLEN + 1];
118
119 (void)sprintf(hold, "%s/%s", name, _PATH_WHATIS);
120 name = hold;
121 }
122
123 if (!freopen(name, "r", stdin))
124 continue;
125
126 foundman = 1;
127
128 /* for each file found */
129 while (fgets(buf, sizeof(buf), stdin)) {
130 if (!strchr(buf, '\n')) {
131 warnx("%s: line too long", name);
132 continue;
133 }
134 lowstr(buf, wbuf);
135 for (p = argv; *p; ++p)
136 if (match(wbuf, *p)) {
137 (void)printf("%s", buf);
138 found[p - argv] = 1;
139
140 /* only print line once */
141 while (*++p)
142 if (match(wbuf, *p))
143 found[p - argv] = 1;
144 break;
145 }
146 }
147 }
148 }
149
150 /*
151 * match --
152 * match anywhere the string appears
153 */
154 int
match(bp,str)155 match(bp, str)
156 char *bp, *str;
157 {
158 int len;
159 char test;
160
161 if (!*bp)
162 return (0);
163 /* backward compatible: everything matches empty string */
164 if (!*str)
165 return (1);
166 for (test = *str++, len = strlen(str); *bp;)
167 if (test == *bp++ && !strncmp(bp, str, len))
168 return (1);
169 return (0);
170 }
171
172 /*
173 * lowstr --
174 * convert a string to lower case
175 */
176 void
lowstr(from,to)177 lowstr(from, to)
178 char *from, *to;
179 {
180 char ch;
181
182 while ((ch = *from++) && ch != '\n')
183 *to++ = isupper(ch) ? tolower(ch) : ch;
184 *to = '\0';
185 }
186
187 /*
188 * usage --
189 * print usage message and die
190 */
191 void
usage()192 usage()
193 {
194
195 (void)fprintf(stderr,
196 "usage: apropos [-C file] [-M path] [-m path] keyword ...\n");
197 exit(1);
198 }
199