1 /* $NetBSD: whatis.c,v 1.23 2008/07/21 14:19:28 lukem 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\ 36 The Regents of the University of California. All rights reserved."); 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 1.23 2008/07/21 14:19:28 lukem 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(int, char **); 66 void dashtrunc(char *, char *); 67 int match(char *, char *); 68 void usage(void); 69 void whatis(char **, char *, int); 70 71 int 72 main(int argc, char **argv) 73 { 74 ENTRY *ep; 75 TAG *tp; 76 int ch, rv; 77 char *beg, *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) /* trim full paths */ 109 if ((beg = strrchr(*p, '/'))) 110 *p = beg + 1; 111 112 if (p_augment) 113 whatis(argv, p_augment, 1); 114 if (p_path || (p_path = getenv("MANPATH"))) 115 whatis(argv, p_path, 1); 116 else { 117 config(conffile); 118 tp = gettag("_whatdb", 0); 119 if (!tp) 120 errx(EXIT_FAILURE, 121 "no database dirs (_whatdb) in config file"); 122 TAILQ_FOREACH(ep, &tp->entrylist, q) { 123 if ((rv = glob(ep->s, GLOB_BRACE | GLOB_NOSORT, NULL, 124 &pg)) != 0) { 125 if (rv == GLOB_NOMATCH) 126 continue; 127 else 128 err(EXIT_FAILURE, "glob"); 129 } 130 if (pg.gl_pathc) 131 for (p = pg.gl_pathv; *p; p++) 132 whatis(argv, *p, 0); 133 globfree(&pg); 134 } 135 } 136 137 if (!foundman) { 138 fprintf(stderr, "whatis: no %s file found.\n", _PATH_WHATIS); 139 exit(1); 140 } 141 rv = 1; 142 for (p = argv; *p; ++p) 143 if (found[p - argv]) 144 rv = 0; 145 else 146 printf("%s: not found\n", *p); 147 exit(rv); 148 } 149 150 void 151 whatis(char **argv, char *path, 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 dashtrunc(buf, wbuf); 174 for (p = argv; *p; ++p) 175 if (match(wbuf, *p)) { 176 printf("%s", buf); 177 found[p - argv] = 1; 178 179 /* only print line once */ 180 while (*++p) 181 if (match(wbuf, *p)) 182 found[p - argv] = 1; 183 break; 184 } 185 } 186 } 187 } 188 189 /* 190 * match -- 191 * match a full word 192 */ 193 int 194 match(char *bp, char *str) 195 { 196 int len; 197 char *start; 198 199 if (!*str || !*bp) 200 return(0); 201 for (len = strlen(str);;) { 202 /* 203 * /bin/[ is a special case. 204 */ 205 for (; *bp && *bp != '[' && !isalnum((unsigned char)*bp); ++bp); 206 if (!*bp) 207 break; 208 209 /* check for word match first */ 210 for (start = bp++; *bp && (*bp == '_' || 211 isalnum((unsigned char) *bp)); ++bp); 212 if (bp - start == len && strncasecmp(start, str, len) == 0) { 213 return(1); 214 } else if (*bp && *bp != ',') { 215 /* check for full string match */ 216 for (bp = start; *bp && *bp != ',' && *bp != '(' && 217 !isspace((unsigned char) *bp); ++bp); 218 if (bp - start == len && 219 strncasecmp(start, str, len) == 0) 220 return(1); 221 } 222 } 223 return(0); 224 } 225 226 /* 227 * dashtrunc -- 228 * truncate a string at " - " 229 */ 230 void 231 dashtrunc(char *from, char *to) 232 { 233 int ch; 234 235 for (; (ch = *from) && ch != '\n' && 236 (ch != ' ' || from[1] != '-' || from[2] != ' '); ++from) 237 *to++ = ch; 238 *to = '\0'; 239 } 240 241 /* 242 * usage -- 243 * print usage message and die 244 */ 245 void 246 usage(void) 247 { 248 (void)fprintf(stderr, 249 "usage: whatis [-C file] [-M path] [-m path] command ...\n"); 250 exit(1); 251 } 252