Annotation of src/usr.bin/apropos/apropos.c, Revision 1.14
1.14 ! jmc 1: /* $OpenBSD: apropos.c,v 1.13 2007/08/06 19:16:06 sobrado 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: #ifndef lint
34: static char copyright[] =
35: "@(#) Copyright (c) 1987, 1993, 1994\n\
36: The Regents of the University of California. All rights reserved.\n";
37: #endif /* not lint */
38:
39: #ifndef lint
40: #if 0
41: static char sccsid[] = "@(#)apropos.c 8.8 (Berkeley) 5/4/95";
42: #else
1.14 ! jmc 43: static char rcsid[] = "$OpenBSD: apropos.c,v 1.13 2007/08/06 19:16:06 sobrado Exp $";
1.1 deraadt 44: #endif
45: #endif /* not lint */
46:
47: #include <sys/param.h>
48: #include <sys/queue.h>
49:
50: #include <ctype.h>
51: #include <err.h>
52: #include <limits.h>
53: #include <stdio.h>
54: #include <stdlib.h>
55: #include <string.h>
56: #include <unistd.h>
57:
58: #include "../man/config.h"
59: #include "../man/pathnames.h"
60:
61: static int *found, foundman;
62:
1.6 deraadt 63: #define MAXLINELEN 8192 /* max line handled */
64:
1.14 ! jmc 65: void apropos(char **, char *, int, char *, char *);
1.8 millert 66: void lowstr(char *, char *);
67: int match(char *, char *);
68: void usage(void);
1.1 deraadt 69:
70: int
1.10 deraadt 71: main(int argc, char *argv[])
1.1 deraadt 72: {
73: ENTRY *ep;
74: TAG *tp;
75: int ch, rv;
1.14 ! jmc 76: char *conffile, *machine, **p, *p_augment, *p_path, *sflag;
1.1 deraadt 77:
78: conffile = NULL;
79: p_augment = p_path = NULL;
1.14 ! jmc 80: machine = sflag = NULL;
! 81: while ((ch = getopt(argc, argv, "C:M:m:P:S:s:")) != -1)
1.1 deraadt 82: switch (ch) {
83: case 'C':
84: conffile = optarg;
85: break;
86: case 'M':
87: case 'P': /* backward compatible */
88: p_path = optarg;
89: break;
90: case 'm':
91: p_augment = optarg;
92: break;
1.14 ! jmc 93: case 'S':
! 94: machine = optarg;
! 95: lowstr(machine, machine);
! 96: break;
! 97: case 's':
! 98: sflag = optarg;
! 99: lowstr(sflag, sflag);
! 100: break;
1.1 deraadt 101: case '?':
102: default:
103: usage();
104: }
105: argv += optind;
106: argc -= optind;
107:
108: if (argc < 1)
109: usage();
110:
1.12 djm 111: if ((found = calloc(argc, sizeof(int))) == NULL)
1.1 deraadt 112: err(1, NULL);
113:
114: for (p = argv; *p; ++p) /* convert to lower-case */
115: lowstr(*p, *p);
116:
117: if (p_augment)
1.14 ! jmc 118: apropos(argv, p_augment, 1, sflag, machine);
1.1 deraadt 119: if (p_path || (p_path = getenv("MANPATH")))
1.14 ! jmc 120: apropos(argv, p_path, 1, sflag, machine);
1.1 deraadt 121: else {
122: config(conffile);
123: ep = (tp = getlist("_whatdb")) == NULL ?
1.11 otto 124: NULL : TAILQ_FIRST(&tp->list);
125: for (; ep != NULL; ep = TAILQ_NEXT(ep, q))
1.14 ! jmc 126: apropos(argv, ep->s, 0, sflag, machine);
1.1 deraadt 127: }
128:
129: if (!foundman)
130: errx(1, "no %s file found", _PATH_WHATIS);
131:
132: rv = 1;
133: for (p = argv; *p; ++p)
134: if (found[p - argv])
135: rv = 0;
136: else
137: (void)printf("%s: nothing appropriate\n", *p);
138: exit(rv);
139: }
140:
141: void
1.14 ! jmc 142: apropos(char **argv, char *path, int buildpath, char *sflag, char *machine)
1.1 deraadt 143: {
144: char *end, *name, **p;
1.6 deraadt 145: char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1];
146: char hold[MAXPATHLEN];
1.14 ! jmc 147: size_t slen = 0, mlen = 0;
! 148:
! 149: if (sflag)
! 150: slen = strlen(sflag);
! 151: if (machine)
! 152: mlen = strlen(machine);
1.1 deraadt 153:
154: for (name = path; name; name = end) { /* through name list */
1.5 deraadt 155: if ((end = strchr(name, ':')))
1.1 deraadt 156: *end++ = '\0';
157:
158: if (buildpath) {
1.3 downsj 159: (void)snprintf(hold, sizeof(hold), "%s/%s", name,
160: _PATH_WHATIS);
1.1 deraadt 161: name = hold;
162: }
163:
164: if (!freopen(name, "r", stdin))
165: continue;
166:
167: foundman = 1;
168:
169: /* for each file found */
170: while (fgets(buf, sizeof(buf), stdin)) {
171: if (!strchr(buf, '\n')) {
172: warnx("%s: line too long", name);
173: continue;
174: }
175: lowstr(buf, wbuf);
1.14 ! jmc 176: if (sflag || machine) {
! 177: char *s = strstr(wbuf, ") - ");
! 178: if (!s)
! 179: continue;
! 180: while (s > wbuf && *s != '/' && *s != '(')
! 181: s--;
! 182: if (machine && *s == '/' &&
! 183: strncmp(s+1, machine, mlen))
! 184: continue;
! 185: while (s > wbuf && *s != '(')
! 186: s--;
! 187: if (sflag && *s == '(' &&
! 188: strncmp(s+1, sflag, slen))
! 189: continue;
! 190: }
1.1 deraadt 191: for (p = argv; *p; ++p)
192: if (match(wbuf, *p)) {
193: (void)printf("%s", buf);
194: found[p - argv] = 1;
195:
196: /* only print line once */
197: while (*++p)
198: if (match(wbuf, *p))
199: found[p - argv] = 1;
200: break;
201: }
202: }
203: }
204: }
205:
206: /*
207: * match --
208: * match anywhere the string appears
209: */
210: int
1.10 deraadt 211: match(char *bp, char *str)
1.1 deraadt 212: {
213: int len;
214: char test;
215:
216: if (!*bp)
217: return (0);
218: /* backward compatible: everything matches empty string */
219: if (!*str)
220: return (1);
221: for (test = *str++, len = strlen(str); *bp;)
222: if (test == *bp++ && !strncmp(bp, str, len))
223: return (1);
224: return (0);
225: }
226:
227: /*
228: * lowstr --
229: * convert a string to lower case
230: */
231: void
1.10 deraadt 232: lowstr(char *from, char *to)
1.1 deraadt 233: {
234: char ch;
235:
236: while ((ch = *from++) && ch != '\n')
237: *to++ = isupper(ch) ? tolower(ch) : ch;
238: *to = '\0';
239: }
240:
241: /*
242: * usage --
243: * print usage message and die
244: */
245: void
1.10 deraadt 246: usage(void)
1.1 deraadt 247: {
248:
249: (void)fprintf(stderr,
1.14 ! jmc 250: "usage: apropos [-C file] [-M path] [-m path] "
! 251: "[-S subsection] [-s section]\n"
! 252: " keyword ...\n");
1.1 deraadt 253: exit(1);
254: }
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