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 41static 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 63static int *found, foundman; 64 65static void dashtrunc(char *, char *); 66static int match(char *, char *); 67__dead static void usage(void); 68static void whatis(char **, char *, int); 69 70int 71main(int argc, char **argv) 72{ 73 ENTRY *ep; 74 TAG *tp; 75 int ch, rv; 76 char *beg, *conffile, **p, *p_augment, *p_path; 77 glob_t pg; 78 79 conffile = NULL; 80 p_augment = p_path = NULL; 81 while ((ch = getopt(argc, argv, "C:M:m:P:")) != -1) 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; 93 case '?': 94 default: 95 usage(); 96 } 97 argv += optind; 98 argc -= optind; 99 100 if (argc < 1) 101 usage(); 102 103 if ((found = malloc((u_int)argc * sizeof(int))) == NULL) 104 err(1, "malloc"); 105 memset(found, 0, argc * sizeof(int)); 106 107 for (p = argv; *p; ++p) /* trim full paths */ 108 if ((beg = strrchr(*p, '/'))) 109 *p = beg + 1; 110 111 if (p_augment) 112 whatis(argv, p_augment, 1); 113 if (p_path || (p_path = getenv("MANPATH"))) 114 whatis(argv, p_path, 1); 115 else { 116 config(conffile); 117 tp = gettag("_whatdb", 0); 118 if (!tp) 119 errx(EXIT_FAILURE, 120 "no database dirs (_whatdb) in config file"); 121 TAILQ_FOREACH(ep, &tp->entrylist, 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 149static void 150whatis(char **argv, char *path, int buildpath) 151{ 152 char *end, *name, **p; 153 char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1]; 154 char hold[MAXPATHLEN + 1]; 155 156 for (name = path; name; name = end) { /* through name list */ 157 if ((end = strchr(name, ':'))) 158 *end++ = '\0'; 159 160 if (buildpath) { 161 (void)sprintf(hold, "%s/%s", name, _PATH_WHATIS); 162 name = hold; 163 } 164 165 if (!freopen(name, "r", stdin)) 166 continue; 167 168 foundman = 1; 169 170 /* for each file found */ 171 while (fgets(buf, sizeof(buf), stdin)) { 172 dashtrunc(buf, wbuf); 173 for (p = argv; *p; ++p) 174 if (match(wbuf, *p)) { 175 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 a full word 191 */ 192static int 193match(char *bp, char *str) 194{ 195 int len; 196 char *start; 197 198 if (!*str || !*bp) 199 return(0); 200 for (len = strlen(str);;) { 201 /* 202 * /bin/[ is a special case. 203 */ 204 for (; *bp && *bp != '[' && !isalnum((unsigned char)*bp); ++bp); 205 if (!*bp) 206 break; 207 208 /* check for word match first */ 209 for (start = bp++; *bp && (*bp == '_' || 210 isalnum((unsigned char) *bp)); ++bp); 211 if (bp - start == len && strncasecmp(start, str, len) == 0) { 212 return(1); 213 } else if (*bp && *bp != ',') { 214 /* check for full string match */ 215 for (bp = start; *bp && *bp != ',' && *bp != '(' && 216 !isspace((unsigned char) *bp); ++bp); 217 if (bp - start == len && 218 strncasecmp(start, str, len) == 0) 219 return(1); 220 } 221 } 222 return(0); 223} 224 225/* 226 * dashtrunc -- 227 * truncate a string at " - " 228 */ 229static void 230dashtrunc(char *from, char *to) 231{ 232 int ch; 233 234 for (; (ch = *from) && ch != '\n' && 235 (ch != ' ' || from[1] != '-' || from[2] != ' '); ++from) 236 *to++ = ch; 237 *to = '\0'; 238} 239 240/* 241 * usage -- 242 * print usage message and die 243 */ 244static void 245usage(void) 246{ 247 (void)fprintf(stderr, 248 "usage: whatis [-C file] [-M path] [-m path] command ...\n"); 249 exit(1); 250} 251