1 /* $NetBSD: apropos.c,v 1.26 2005/09/17 19:18:31 elad 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. Neither the name of the University nor the names of its contributors 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/cdefs.h> 33 34 #ifndef lint 35 __COPYRIGHT("@(#) 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 43 __RCSID("$NetBSD: apropos.c,v 1.26 2005/09/17 19:18:31 elad Exp $"); 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 <glob.h> 53 #include <limits.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 59 #include "manconf.h" /* from ../man/ */ 60 #include "pathnames.h" /* from ../man/ */ 61 62 static int *found, foundman; 63 64 #define MAXLINELEN 8192 /* max line handled */ 65 66 void apropos(char **, char *, int); 67 void lowstr(char *, char *); 68 int match(char *, char *); 69 void usage(void); 70 71 int 72 main(int argc, char *argv[]) 73 { 74 ENTRY *ep; 75 TAG *tp; 76 int ch, rv; 77 char *conffile, **p, *p_augment, *p_path; 78 glob_t pg; 79 80 conffile = NULL; 81 p_augment = p_path = NULL; 82 while ((ch = getopt(argc, argv, "C:M:m:P:")) != -1) 83 switch (ch) { 84 case 'C': 85 conffile = optarg; 86 break; 87 case 'M': 88 case 'P': /* backward compatible */ 89 p_path = optarg; 90 break; 91 case 'm': 92 p_augment = optarg; 93 break; 94 case '?': 95 default: 96 usage(); 97 } 98 argv += optind; 99 argc -= optind; 100 101 if (argc < 1) 102 usage(); 103 104 if ((found = malloc((u_int)argc * sizeof(int))) == NULL) 105 err(1, "malloc"); 106 memset(found, 0, argc * sizeof(int)); 107 108 for (p = argv; *p; ++p) /* convert to lower-case */ 109 lowstr(*p, *p); 110 111 if (p_augment) 112 apropos(argv, p_augment, 1); 113 if (p_path || (p_path = getenv("MANPATH"))) 114 apropos(argv, p_path, 1); 115 else { 116 config(conffile); 117 tp = getlist("_whatdb", 1); 118 TAILQ_FOREACH(ep, &tp->list, q) { 119 if ((rv = glob(ep->s, GLOB_BRACE | GLOB_NOSORT, NULL, 120 &pg)) != 0) { 121 if (rv == GLOB_NOMATCH) 122 continue; 123 else 124 err(EXIT_FAILURE, "glob"); 125 } 126 if (pg.gl_pathc) 127 for (p = pg.gl_pathv; *p; p++) 128 apropos(argv, *p, 0); 129 globfree(&pg); 130 } 131 } 132 133 if (!foundman) 134 errx(1, "no %s file found", _PATH_WHATIS); 135 136 rv = 1; 137 for (p = argv; *p; ++p) 138 if (found[p - argv]) 139 rv = 0; 140 else 141 (void)printf("%s: nothing appropriate\n", *p); 142 exit(rv); 143 } 144 145 void 146 apropos(char **argv, char *path, int buildpath) 147 { 148 char *end, *name, **p; 149 char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1]; 150 char hold[MAXPATHLEN + 1]; 151 152 for (name = path; name; name = end) { /* through name list */ 153 if ((end = strchr(name, ':'))) 154 *end++ = '\0'; 155 156 if (buildpath) { 157 (void)snprintf(hold, sizeof(hold), "%s/%s", name, _PATH_WHATIS); 158 name = hold; 159 } 160 161 if (!freopen(name, "r", stdin)) 162 continue; 163 164 foundman = 1; 165 166 /* for each file found */ 167 while (fgets(buf, sizeof(buf), stdin)) { 168 if (!strchr(buf, '\n')) { 169 warnx("%s: line too long", name); 170 continue; 171 } 172 lowstr(buf, wbuf); 173 for (p = argv; *p; ++p) 174 if (match(wbuf, *p)) { 175 (void)printf("%s", buf); 176 found[p - argv] = 1; 177 178 /* only print line once */ 179 while (*++p) 180 if (match(wbuf, *p)) 181 found[p - argv] = 1; 182 break; 183 } 184 } 185 } 186 } 187 188 /* 189 * match -- 190 * match anywhere the string appears 191 */ 192 int 193 match(char *bp, char *str) 194 { 195 int len; 196 char test; 197 198 if (!*bp) 199 return (0); 200 /* backward compatible: everything matches empty string */ 201 if (!*str) 202 return (1); 203 for (test = *str++, len = strlen(str); *bp;) 204 if (test == *bp++ && !strncmp(bp, str, len)) 205 return (1); 206 return (0); 207 } 208 209 /* 210 * lowstr -- 211 * convert a string to lower case 212 */ 213 void 214 lowstr(char *from, char *to) 215 { 216 char ch; 217 218 while ((ch = *from++) && ch != '\n') 219 *to++ = tolower((unsigned char)ch); 220 *to = '\0'; 221 } 222 223 /* 224 * usage -- 225 * print usage message and die 226 */ 227 void 228 usage(void) 229 { 230 231 (void)fprintf(stderr, 232 "usage: %s [-C file] [-M path] [-m path] keyword ...\n", 233 getprogname()); 234 exit(1); 235 } 236