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1.16 ! deraadt 1: /* $OpenBSD: apropos.c,v 1.15 2009/10/27 23:59:35 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.
1.9 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include <sys/param.h>
34: #include <sys/queue.h>
35:
36: #include <ctype.h>
37: #include <err.h>
38: #include <limits.h>
39: #include <stdio.h>
40: #include <stdlib.h>
41: #include <string.h>
42: #include <unistd.h>
43:
44: #include "../man/config.h"
45: #include "../man/pathnames.h"
46:
47: static int *found, foundman;
48:
1.6 deraadt 49: #define MAXLINELEN 8192 /* max line handled */
50:
1.14 jmc 51: void apropos(char **, char *, int, char *, char *);
1.8 millert 52: void lowstr(char *, char *);
53: int match(char *, char *);
54: void usage(void);
1.1 deraadt 55:
56: int
1.10 deraadt 57: main(int argc, char *argv[])
1.1 deraadt 58: {
59: ENTRY *ep;
60: TAG *tp;
61: int ch, rv;
1.14 jmc 62: char *conffile, *machine, **p, *p_augment, *p_path, *sflag;
1.1 deraadt 63:
64: conffile = NULL;
65: p_augment = p_path = NULL;
1.14 jmc 66: machine = sflag = NULL;
67: while ((ch = getopt(argc, argv, "C:M:m:P:S:s:")) != -1)
1.1 deraadt 68: switch (ch) {
69: case 'C':
70: conffile = optarg;
71: break;
72: case 'M':
73: case 'P': /* backward compatible */
74: p_path = optarg;
75: break;
76: case 'm':
77: p_augment = optarg;
78: break;
1.14 jmc 79: case 'S':
80: machine = optarg;
81: lowstr(machine, machine);
82: break;
83: case 's':
84: sflag = optarg;
85: lowstr(sflag, sflag);
86: break;
1.1 deraadt 87: case '?':
88: default:
89: usage();
90: }
91: argv += optind;
92: argc -= optind;
93:
94: if (argc < 1)
95: usage();
96:
1.12 djm 97: if ((found = calloc(argc, sizeof(int))) == NULL)
1.1 deraadt 98: err(1, NULL);
99:
100: for (p = argv; *p; ++p) /* convert to lower-case */
101: lowstr(*p, *p);
102:
103: if (p_augment)
1.14 jmc 104: apropos(argv, p_augment, 1, sflag, machine);
1.1 deraadt 105: if (p_path || (p_path = getenv("MANPATH")))
1.14 jmc 106: apropos(argv, p_path, 1, sflag, machine);
1.1 deraadt 107: else {
108: config(conffile);
109: ep = (tp = getlist("_whatdb")) == NULL ?
1.11 otto 110: NULL : TAILQ_FIRST(&tp->list);
111: for (; ep != NULL; ep = TAILQ_NEXT(ep, q))
1.14 jmc 112: apropos(argv, ep->s, 0, sflag, machine);
1.1 deraadt 113: }
114:
115: if (!foundman)
116: errx(1, "no %s file found", _PATH_WHATIS);
117:
118: rv = 1;
119: for (p = argv; *p; ++p)
120: if (found[p - argv])
121: rv = 0;
122: else
123: (void)printf("%s: nothing appropriate\n", *p);
124: exit(rv);
125: }
126:
127: void
1.14 jmc 128: apropos(char **argv, char *path, int buildpath, char *sflag, char *machine)
1.1 deraadt 129: {
130: char *end, *name, **p;
1.6 deraadt 131: char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1];
132: char hold[MAXPATHLEN];
1.14 jmc 133: size_t slen = 0, mlen = 0;
134:
135: if (sflag)
136: slen = strlen(sflag);
137: if (machine)
138: mlen = strlen(machine);
1.1 deraadt 139:
140: for (name = path; name; name = end) { /* through name list */
1.5 deraadt 141: if ((end = strchr(name, ':')))
1.1 deraadt 142: *end++ = '\0';
143:
144: if (buildpath) {
1.3 downsj 145: (void)snprintf(hold, sizeof(hold), "%s/%s", name,
146: _PATH_WHATIS);
1.1 deraadt 147: name = hold;
148: }
149:
150: if (!freopen(name, "r", stdin))
151: continue;
152:
153: foundman = 1;
154:
155: /* for each file found */
156: while (fgets(buf, sizeof(buf), stdin)) {
157: if (!strchr(buf, '\n')) {
158: warnx("%s: line too long", name);
159: continue;
160: }
161: lowstr(buf, wbuf);
1.14 jmc 162: if (sflag || machine) {
163: char *s = strstr(wbuf, ") - ");
164: if (!s)
165: continue;
166: while (s > wbuf && *s != '/' && *s != '(')
167: s--;
168: if (machine && *s == '/' &&
169: strncmp(s+1, machine, mlen))
170: continue;
171: while (s > wbuf && *s != '(')
172: s--;
173: if (sflag && *s == '(' &&
174: strncmp(s+1, sflag, slen))
175: continue;
176: }
1.1 deraadt 177: for (p = argv; *p; ++p)
178: if (match(wbuf, *p)) {
179: (void)printf("%s", buf);
180: found[p - argv] = 1;
181:
182: /* only print line once */
183: while (*++p)
184: if (match(wbuf, *p))
185: found[p - argv] = 1;
186: break;
187: }
188: }
189: }
190: }
191:
192: /*
193: * match --
194: * match anywhere the string appears
195: */
196: int
1.10 deraadt 197: match(char *bp, char *str)
1.1 deraadt 198: {
199: int len;
200: char test;
201:
202: if (!*bp)
203: return (0);
204: /* backward compatible: everything matches empty string */
205: if (!*str)
206: return (1);
207: for (test = *str++, len = strlen(str); *bp;)
208: if (test == *bp++ && !strncmp(bp, str, len))
209: return (1);
210: return (0);
211: }
212:
213: /*
214: * lowstr --
215: * convert a string to lower case
216: */
217: void
1.10 deraadt 218: lowstr(char *from, char *to)
1.1 deraadt 219: {
1.16 ! deraadt 220: unsigned char ch;
1.1 deraadt 221:
222: while ((ch = *from++) && ch != '\n')
223: *to++ = isupper(ch) ? tolower(ch) : ch;
224: *to = '\0';
225: }
226:
227: /*
228: * usage --
229: * print usage message and die
230: */
231: void
1.10 deraadt 232: usage(void)
1.1 deraadt 233: {
234:
235: (void)fprintf(stderr,
1.14 jmc 236: "usage: apropos [-C file] [-M path] [-m path] "
237: "[-S subsection] [-s section]\n"
238: " keyword ...\n");
1.1 deraadt 239: exit(1);
240: }