1 /* $NetBSD: apropos.c,v 1.24 2004/10/30 16:10:46 dsl 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 1.24 2004/10/30 16:10:46 dsl 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 int main __P((int, char **)); 67 void apropos __P((char **, char *, int)); 68 void lowstr __P((char *, char *)); 69 int match __P((char *, char *)); 70 void usage __P((void)); 71 72 int 73 main(argc, argv) 74 int argc; 75 char *argv[]; 76 { 77 ENTRY *ep; 78 TAG *tp; 79 int ch, rv; 80 char *conffile, **p, *p_augment, *p_path; 81 glob_t pg; 82 83 conffile = NULL; 84 p_augment = p_path = NULL; 85 while ((ch = getopt(argc, argv, "C:M:m:P:")) != -1) 86 switch (ch) { 87 case 'C': 88 conffile = optarg; 89 break; 90 case 'M': 91 case 'P': /* backward compatible */ 92 p_path = optarg; 93 break; 94 case 'm': 95 p_augment = optarg; 96 break; 97 case '?': 98 default: 99 usage(); 100 } 101 argv += optind; 102 argc -= optind; 103 104 if (argc < 1) 105 usage(); 106 107 if ((found = malloc((u_int)argc * sizeof(int))) == NULL) 108 err(1, "malloc"); 109 memset(found, 0, argc * sizeof(int)); 110 111 for (p = argv; *p; ++p) /* convert to lower-case */ 112 lowstr(*p, *p); 113 114 if (p_augment) 115 apropos(argv, p_augment, 1); 116 if (p_path || (p_path = getenv("MANPATH"))) 117 apropos(argv, p_path, 1); 118 else { 119 config(conffile); 120 tp = getlist("_whatdb", 1); 121 TAILQ_FOREACH(ep, &tp->list, q) { 122 if ((rv = glob(ep->s, GLOB_BRACE | GLOB_NOSORT, NULL, 123 &pg)) != 0) { 124 if (rv == GLOB_NOMATCH) 125 continue; 126 else 127 err(EXIT_FAILURE, "glob"); 128 } 129 if (pg.gl_pathc) 130 for (p = pg.gl_pathv; *p; p++) 131 apropos(argv, *p, 0); 132 globfree(&pg); 133 } 134 } 135 136 if (!foundman) 137 errx(1, "no %s file found", _PATH_WHATIS); 138 139 rv = 1; 140 for (p = argv; *p; ++p) 141 if (found[p - argv]) 142 rv = 0; 143 else 144 (void)printf("%s: nothing appropriate\n", *p); 145 exit(rv); 146 } 147 148 void 149 apropos(argv, path, buildpath) 150 char **argv, *path; 151 int buildpath; 152 { 153 char *end, *name, **p; 154 char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1]; 155 char hold[MAXPATHLEN + 1]; 156 157 for (name = path; name; name = end) { /* through name list */ 158 if ((end = strchr(name, ':'))) 159 *end++ = '\0'; 160 161 if (buildpath) { 162 (void)sprintf(hold, "%s/%s", name, _PATH_WHATIS); 163 name = hold; 164 } 165 166 if (!freopen(name, "r", stdin)) 167 continue; 168 169 foundman = 1; 170 171 /* for each file found */ 172 while (fgets(buf, sizeof(buf), stdin)) { 173 if (!strchr(buf, '\n')) { 174 warnx("%s: line too long", name); 175 continue; 176 } 177 lowstr(buf, wbuf); 178 for (p = argv; *p; ++p) 179 if (match(wbuf, *p)) { 180 (void)printf("%s", buf); 181 found[p - argv] = 1; 182 183 /* only print line once */ 184 while (*++p) 185 if (match(wbuf, *p)) 186 found[p - argv] = 1; 187 break; 188 } 189 } 190 } 191 } 192 193 /* 194 * match -- 195 * match anywhere the string appears 196 */ 197 int 198 match(bp, str) 199 char *bp, *str; 200 { 201 int len; 202 char test; 203 204 if (!*bp) 205 return (0); 206 /* backward compatible: everything matches empty string */ 207 if (!*str) 208 return (1); 209 for (test = *str++, len = strlen(str); *bp;) 210 if (test == *bp++ && !strncmp(bp, str, len)) 211 return (1); 212 return (0); 213 } 214 215 /* 216 * lowstr -- 217 * convert a string to lower case 218 */ 219 void 220 lowstr(from, to) 221 char *from, *to; 222 { 223 char ch; 224 225 while ((ch = *from++) && ch != '\n') 226 *to++ = tolower((unsigned char)ch); 227 *to = '\0'; 228 } 229 230 /* 231 * usage -- 232 * print usage message and die 233 */ 234 void 235 usage() 236 { 237 238 (void)fprintf(stderr, 239 "usage: %s [-C file] [-M path] [-m path] keyword ...\n", 240 getprogname()); 241 exit(1); 242 } 243