1 /* $NetBSD: whatis.c,v 1.20 2005/08/25 16:29:15 rpaulo Exp $ */ 2 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. 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\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[] = "@(#)whatis.c 8.5 (Berkeley) 1/2/94"; 42 #else 43 __RCSID("$NetBSD: whatis.c,v 1.20 2005/08/25 16:29:15 rpaulo 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 <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <unistd.h> 57 58 #include "manconf.h" /* from ../man/ */ 59 #include "pathnames.h" /* from ../man/ */ 60 61 #define MAXLINELEN 8192 /* max line handled */ 62 63 static int *found, foundman; 64 65 int main __P((int, char **)); 66 void dashtrunc __P((char *, char *)); 67 int match __P((char *, char *)); 68 void usage __P((void)); 69 void whatis __P((char **, char *, int)); 70 71 int 72 main(argc, argv) 73 int argc; 74 char *argv[]; 75 { 76 ENTRY *ep; 77 TAG *tp; 78 int ch, rv; 79 char *beg, *conffile, **p, *p_augment, *p_path; 80 glob_t pg; 81 82 conffile = NULL; 83 p_augment = p_path = NULL; 84 while ((ch = getopt(argc, argv, "C:M:m:P:")) != -1) 85 switch (ch) { 86 case 'C': 87 conffile = optarg; 88 break; 89 case 'M': 90 case 'P': /* backward compatible */ 91 p_path = optarg; 92 break; 93 case 'm': 94 p_augment = optarg; 95 break; 96 case '?': 97 default: 98 usage(); 99 } 100 argv += optind; 101 argc -= optind; 102 103 if (argc < 1) 104 usage(); 105 106 if ((found = malloc((u_int)argc * sizeof(int))) == NULL) 107 err(1, "malloc"); 108 memset(found, 0, argc * sizeof(int)); 109 110 for (p = argv; *p; ++p) /* trim full paths */ 111 if ((beg = strrchr(*p, '/'))) 112 *p = beg + 1; 113 114 if (p_augment) 115 whatis(argv, p_augment, 1); 116 if (p_path || (p_path = getenv("MANPATH"))) 117 whatis(argv, p_path, 1); 118 else { 119 config(conffile); 120 tp = getlist("_whatdb", 0); 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 whatis(argv, *p, 0); 132 globfree(&pg); 133 } 134 } 135 136 if (!foundman) { 137 fprintf(stderr, "whatis: no %s file found.\n", _PATH_WHATIS); 138 exit(1); 139 } 140 rv = 1; 141 for (p = argv; *p; ++p) 142 if (found[p - argv]) 143 rv = 0; 144 else 145 printf("%s: not found\n", *p); 146 exit(rv); 147 } 148 149 void 150 whatis(argv, path, buildpath) 151 char **argv, *path; 152 int buildpath; 153 { 154 char *end, *name, **p; 155 char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1]; 156 char hold[MAXPATHLEN + 1]; 157 158 for (name = path; name; name = end) { /* through name list */ 159 if ((end = strchr(name, ':'))) 160 *end++ = '\0'; 161 162 if (buildpath) { 163 (void)sprintf(hold, "%s/%s", name, _PATH_WHATIS); 164 name = hold; 165 } 166 167 if (!freopen(name, "r", stdin)) 168 continue; 169 170 foundman = 1; 171 172 /* for each file found */ 173 while (fgets(buf, sizeof(buf), stdin)) { 174 dashtrunc(buf, wbuf); 175 for (p = argv; *p; ++p) 176 if (match(wbuf, *p)) { 177 printf("%s", buf); 178 found[p - argv] = 1; 179 180 /* only print line once */ 181 while (*++p) 182 if (match(wbuf, *p)) 183 found[p - argv] = 1; 184 break; 185 } 186 } 187 } 188 } 189 190 /* 191 * match -- 192 * match a full word 193 */ 194 int 195 match(bp, str) 196 char *bp, *str; 197 { 198 int len; 199 char *start; 200 201 if (!*str || !*bp) 202 return(0); 203 for (len = strlen(str);;) { 204 /* 205 * /bin/[ is a special case. 206 */ 207 for (; *bp && *bp != '[' && !isalnum((unsigned char)*bp); ++bp); 208 if (!*bp) 209 break; 210 for (start = bp++; 211 *bp && (*bp == '_' || isalnum((unsigned char)*bp)); ++bp); 212 if (bp - start == len && !strncasecmp(start, str, len)) 213 return(1); 214 } 215 return(0); 216 } 217 218 /* 219 * dashtrunc -- 220 * truncate a string at " - " 221 */ 222 void 223 dashtrunc(from, to) 224 char *from, *to; 225 { 226 int ch; 227 228 for (; (ch = *from) && ch != '\n' && 229 (ch != ' ' || from[1] != '-' || from[2] != ' '); ++from) 230 *to++ = ch; 231 *to = '\0'; 232 } 233 234 /* 235 * usage -- 236 * print usage message and die 237 */ 238 void 239 usage() 240 { 241 (void)fprintf(stderr, 242 "usage: whatis [-C file] [-M path] [-m path] command ...\n"); 243 exit(1); 244 } 245