Annotation of src/usr.bin/whatis/whatis.c, Revision 1.13
1.13 ! deraadt 1: /* $OpenBSD: whatis.c,v 1.12 2007/03/20 03:56:13 tedu Exp $ */
1.2 deraadt 2:
1.1 deraadt 3: /*
4: * Copyright (c) 1987, 1993
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.
1.8 millert 15: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
32: #include <sys/param.h>
33: #include <sys/queue.h>
34:
35: #include <ctype.h>
36: #include <err.h>
37: #include <stdio.h>
38: #include <stdlib.h>
39: #include <string.h>
40:
41: #include "../man/config.h"
42: #include "../man/pathnames.h"
43:
1.4 deraadt 44: #define MAXLINELEN 8192 /* max line handled */
1.1 deraadt 45:
46: static int *found, foundman;
1.5 millert 47: extern char *__progname;
1.1 deraadt 48:
1.7 millert 49: void dashtrunc(char *, char *);
50: int match(char *, char *);
51: void usage(void);
52: void whatis(char **, char *, int);
1.1 deraadt 53:
54: int
1.9 deraadt 55: main(int argc, char *argv[])
1.1 deraadt 56: {
57: ENTRY *ep;
58: TAG *tp;
59: int ch, rv;
60: char *beg, *conffile, **p, *p_augment, *p_path;
61:
62: conffile = NULL;
63: p_augment = p_path = NULL;
1.3 millert 64: while ((ch = getopt(argc, argv, "C:M:m:P:")) != -1)
1.1 deraadt 65: switch (ch) {
66: case 'C':
67: conffile = optarg;
68: break;
69: case 'M':
70: case 'P': /* backward compatible */
71: p_path = optarg;
72: break;
73: case 'm':
74: p_augment = optarg;
75: break;
76: case '?':
77: default:
78: usage();
79: }
80: argv += optind;
81: argc -= optind;
82:
83: if (argc < 1)
84: usage();
85:
1.11 djm 86: if ((found = calloc(argc, sizeof(int))) == NULL)
1.1 deraadt 87: err(1, NULL);
88:
89: for (p = argv; *p; ++p) /* trim full paths */
1.5 millert 90: if ((beg = strrchr(*p, '/')))
1.1 deraadt 91: *p = beg + 1;
92:
93: if (p_augment)
94: whatis(argv, p_augment, 1);
95: if (p_path || (p_path = getenv("MANPATH")))
96: whatis(argv, p_path, 1);
97: else {
98: config(conffile);
99: ep = (tp = getlist("_whatdb")) == NULL ?
1.10 otto 100: NULL : TAILQ_FIRST(&tp->list);
101: for (; ep != NULL; ep = TAILQ_NEXT(ep, q))
1.1 deraadt 102: whatis(argv, ep->s, 0);
103: }
104:
105: if (!foundman) {
106: fprintf(stderr, "whatis: no %s file found.\n", _PATH_WHATIS);
107: exit(1);
108: }
109: rv = 1;
110: for (p = argv; *p; ++p)
111: if (found[p - argv])
112: rv = 0;
113: else
114: printf("%s: not found\n", *p);
115: exit(rv);
116: }
117:
118: void
1.9 deraadt 119: whatis(char **argv, char *path, int buildpath)
1.1 deraadt 120: {
1.6 mpech 121: char *end, *name, **p;
1.1 deraadt 122: char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1];
1.4 deraadt 123: char hold[MAXPATHLEN];
1.1 deraadt 124:
125: for (name = path; name; name = end) { /* through name list */
1.5 millert 126: if ((end = strchr(name, ':')))
1.1 deraadt 127: *end++ = '\0';
128:
129: if (buildpath) {
1.4 deraadt 130: (void)snprintf(hold, sizeof hold, "%s/%s",
131: name, _PATH_WHATIS);
1.1 deraadt 132: name = hold;
133: }
134:
135: if (!freopen(name, "r", stdin))
136: continue;
137:
138: foundman = 1;
139:
140: /* for each file found */
141: while (fgets(buf, sizeof(buf), stdin)) {
142: dashtrunc(buf, wbuf);
143: for (p = argv; *p; ++p)
144: if (match(wbuf, *p)) {
145: printf("%s", buf);
146: found[p - argv] = 1;
147:
148: /* only print line once */
149: while (*++p)
150: if (match(wbuf, *p))
151: found[p - argv] = 1;
152: break;
153: }
154: }
155: }
156: }
157:
158: /*
159: * match --
1.5 millert 160: * match a full word or a full string
1.1 deraadt 161: */
162: int
1.9 deraadt 163: match(char *bp, char *str)
1.1 deraadt 164: {
1.6 mpech 165: int len;
166: char *start;
1.1 deraadt 167:
168: if (!*str || !*bp)
169: return(0);
170: for (len = strlen(str);;) {
1.5 millert 171: /* skip leading crud */
172: for (; *bp && !isalnum(*bp); ++bp)
173: ;
1.1 deraadt 174: if (!*bp)
175: break;
1.5 millert 176:
177: /* check for word match first */
1.12 tedu 178: for (start = bp++; *bp == '_' || isalnum(*bp); ++bp)
1.5 millert 179: ;
180: if (bp - start == len) {
181: if (strncasecmp(start, str, len) == 0)
182: return(1);
183: } else if (*bp && *bp != ',') {
184: /* check for full string match */
185: for (bp = start;
186: *bp && *bp != ',' && *bp != '(' && !isspace(*bp); ++bp)
187: ;
188: if (bp - start == len && strncasecmp(start, str, len) == 0)
189: return(1);
190: }
1.1 deraadt 191: }
192: return(0);
193: }
194:
195: /*
196: * dashtrunc --
197: * truncate a string at " - "
198: */
199: void
1.9 deraadt 200: dashtrunc(char *from, char *to)
1.1 deraadt 201: {
1.6 mpech 202: int ch;
1.1 deraadt 203:
204: for (; (ch = *from) && ch != '\n' &&
205: (ch != ' ' || from[1] != '-' || from[2] != ' '); ++from)
206: *to++ = ch;
207: *to = '\0';
208: }
209:
210: /*
211: * usage --
212: * print usage message and die
213: */
214: void
1.9 deraadt 215: usage(void)
1.1 deraadt 216: {
1.5 millert 217:
1.1 deraadt 218: (void)fprintf(stderr,
1.5 millert 219: "usage: %s [-C file] [-M path] [-m path] command ...\n",
220: __progname);
1.1 deraadt 221: exit(1);
222: }
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