1 /* $NetBSD: whatis.c,v 1.9 1997/11/12 00:05:00 mrg 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 38 #ifndef lint 39 __COPYRIGHT("@(#) Copyright (c) 1987, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"); 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)whatis.c 8.5 (Berkeley) 1/2/94"; 46 #else 47 __RCSID("$NetBSD: whatis.c,v 1.9 1997/11/12 00:05:00 mrg Exp $"); 48 #endif 49 #endif /* not lint */ 50 51 #include <sys/param.h> 52 #include <sys/queue.h> 53 54 #include <ctype.h> 55 #include <err.h> 56 #include <glob.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 61 #include "config.h" 62 #include "pathnames.h" 63 64 #define MAXLINELEN 8192 /* max line handled */ 65 66 static int *found, foundman; 67 68 int main __P((int, char **)); 69 void dashtrunc __P((char *, char *)); 70 int match __P((char *, char *)); 71 void usage __P((void)); 72 void whatis __P((char **, char *, int)); 73 74 int 75 main(argc, argv) 76 int argc; 77 char *argv[]; 78 { 79 ENTRY *ep; 80 TAG *tp; 81 int ch, rv; 82 char *beg, *conffile, **p, *p_augment, *p_path; 83 glob_t pg; 84 85 conffile = NULL; 86 p_augment = p_path = NULL; 87 while ((ch = getopt(argc, argv, "C:M:m:P:")) != -1) 88 switch (ch) { 89 case 'C': 90 conffile = optarg; 91 break; 92 case 'M': 93 case 'P': /* backward compatible */ 94 p_path = optarg; 95 break; 96 case 'm': 97 p_augment = optarg; 98 break; 99 case '?': 100 default: 101 usage(); 102 } 103 argv += optind; 104 argc -= optind; 105 106 if (argc < 1) 107 usage(); 108 109 if ((found = malloc((u_int)argc * sizeof(int))) == NULL) 110 err(1, "malloc"); 111 memset(found, 0, argc * sizeof(int)); 112 113 for (p = argv; *p; ++p) /* trim full paths */ 114 if ((beg = strrchr(*p, '/'))) 115 *p = beg + 1; 116 117 if (p_augment) 118 whatis(argv, p_augment, 1); 119 if (p_path || (p_path = getenv("MANPATH"))) 120 whatis(argv, p_path, 1); 121 else { 122 config(conffile); 123 ep = (tp = getlist("_whatdb")) == NULL ? 124 NULL : tp->list.tqh_first; 125 for (; ep != NULL; ep = ep->q.tqe_next) { 126 if (glob(ep->s, GLOB_BRACE | GLOB_NOSORT | GLOB_QUOTE, 127 NULL, &pg) != 0) 128 err(1, "glob"); 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 for (; *bp && !isdigit(*bp) && !isalpha(*bp); ++bp); 205 if (!*bp) 206 break; 207 for (start = bp++; 208 *bp && (*bp == '_' || isdigit(*bp) || isalpha(*bp)); ++bp); 209 if (bp - start == len && !strncasecmp(start, str, len)) 210 return(1); 211 } 212 return(0); 213 } 214 215 /* 216 * dashtrunc -- 217 * truncate a string at " - " 218 */ 219 void 220 dashtrunc(from, to) 221 char *from, *to; 222 { 223 int ch; 224 225 for (; (ch = *from) && ch != '\n' && 226 (ch != ' ' || from[1] != '-' || from[2] != ' '); ++from) 227 *to++ = ch; 228 *to = '\0'; 229 } 230 231 /* 232 * usage -- 233 * print usage message and die 234 */ 235 void 236 usage() 237 { 238 (void)fprintf(stderr, 239 "usage: whatis [-C file] [-M path] [-m path] command ...\n"); 240 exit(1); 241 } 242