1 /* $NetBSD: whatis.c,v 1.13 2002/03/08 20:23:11 jdolecek 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 1.13 2002/03/08 20:23:11 jdolecek 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 #include <unistd.h> 61 62 #include <man/config.h> 63 #include <man/pathnames.h> 64 65 #define MAXLINELEN 8192 /* max line handled */ 66 67 static int *found, foundman; 68 69 int main __P((int, char **)); 70 void dashtrunc __P((char *, char *)); 71 int match __P((char *, char *)); 72 void usage __P((void)); 73 void whatis __P((char **, char *, int)); 74 75 int 76 main(argc, argv) 77 int argc; 78 char *argv[]; 79 { 80 ENTRY *ep; 81 TAG *tp; 82 int ch, rv; 83 char *beg, *conffile, **p, *p_augment, *p_path; 84 glob_t pg; 85 86 conffile = NULL; 87 p_augment = p_path = NULL; 88 while ((ch = getopt(argc, argv, "C:M:m:P:")) != -1) 89 switch (ch) { 90 case 'C': 91 conffile = optarg; 92 break; 93 case 'M': 94 case 'P': /* backward compatible */ 95 p_path = optarg; 96 break; 97 case 'm': 98 p_augment = optarg; 99 break; 100 case '?': 101 default: 102 usage(); 103 } 104 argv += optind; 105 argc -= optind; 106 107 if (argc < 1) 108 usage(); 109 110 if ((found = malloc((u_int)argc * sizeof(int))) == NULL) 111 err(1, "malloc"); 112 memset(found, 0, argc * sizeof(int)); 113 114 for (p = argv; *p; ++p) /* trim full paths */ 115 if ((beg = strrchr(*p, '/'))) 116 *p = beg + 1; 117 118 if (p_augment) 119 whatis(argv, p_augment, 1); 120 if (p_path || (p_path = getenv("MANPATH"))) 121 whatis(argv, p_path, 1); 122 else { 123 config(conffile); 124 ep = (tp = getlist("_whatdb")) == NULL ? 125 NULL : TAILQ_FIRST(&tp->list); 126 for (; ep != NULL; ep = TAILQ_NEXT(ep, q)) { 127 if ((rv = glob(ep->s, GLOB_BRACE | GLOB_NOSORT, NULL, 128 &pg)) != 0) { 129 if (rv == GLOB_NOMATCH) 130 continue; 131 else 132 err(EXIT_FAILURE, "glob"); 133 } 134 if (pg.gl_pathc) 135 for (p = pg.gl_pathv; *p; p++) 136 whatis(argv, *p, 0); 137 globfree(&pg); 138 } 139 } 140 141 if (!foundman) { 142 fprintf(stderr, "whatis: no %s file found.\n", _PATH_WHATIS); 143 exit(1); 144 } 145 rv = 1; 146 for (p = argv; *p; ++p) 147 if (found[p - argv]) 148 rv = 0; 149 else 150 printf("%s: not found\n", *p); 151 exit(rv); 152 } 153 154 void 155 whatis(argv, path, buildpath) 156 char **argv, *path; 157 int buildpath; 158 { 159 char *end, *name, **p; 160 char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1]; 161 char hold[MAXPATHLEN + 1]; 162 163 for (name = path; name; name = end) { /* through name list */ 164 if ((end = strchr(name, ':'))) 165 *end++ = '\0'; 166 167 if (buildpath) { 168 (void)sprintf(hold, "%s/%s", name, _PATH_WHATIS); 169 name = hold; 170 } 171 172 if (!freopen(name, "r", stdin)) 173 continue; 174 175 foundman = 1; 176 177 /* for each file found */ 178 while (fgets(buf, sizeof(buf), stdin)) { 179 dashtrunc(buf, wbuf); 180 for (p = argv; *p; ++p) 181 if (match(wbuf, *p)) { 182 printf("%s", buf); 183 found[p - argv] = 1; 184 185 /* only print line once */ 186 while (*++p) 187 if (match(wbuf, *p)) 188 found[p - argv] = 1; 189 break; 190 } 191 } 192 } 193 } 194 195 /* 196 * match -- 197 * match a full word 198 */ 199 int 200 match(bp, str) 201 char *bp, *str; 202 { 203 int len; 204 char *start; 205 206 if (!*str || !*bp) 207 return(0); 208 for (len = strlen(str);;) { 209 for (; *bp && !isdigit(*bp) && !isalpha(*bp); ++bp); 210 if (!*bp) 211 break; 212 for (start = bp++; 213 *bp && (*bp == '_' || isdigit(*bp) || isalpha(*bp)); ++bp); 214 if (bp - start == len && !strncasecmp(start, str, len)) 215 return(1); 216 } 217 return(0); 218 } 219 220 /* 221 * dashtrunc -- 222 * truncate a string at " - " 223 */ 224 void 225 dashtrunc(from, to) 226 char *from, *to; 227 { 228 int ch; 229 230 for (; (ch = *from) && ch != '\n' && 231 (ch != ' ' || from[1] != '-' || from[2] != ' '); ++from) 232 *to++ = ch; 233 *to = '\0'; 234 } 235 236 /* 237 * usage -- 238 * print usage message and die 239 */ 240 void 241 usage() 242 { 243 (void)fprintf(stderr, 244 "usage: whatis [-C file] [-M path] [-m path] command ...\n"); 245 exit(1); 246 } 247