1 /* $NetBSD: apropos.c,v 1.11 1997/11/12 00:04:49 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1987, 1993, 1994 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, 1994\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[] = "@(#)apropos.c 8.8 (Berkeley) 5/4/95"; 46 #else 47 __RCSID("$NetBSD: apropos.c,v 1.11 1997/11/12 00:04:49 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 <limits.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 #include "config.h" 64 #include "pathnames.h" 65 66 static int *found, foundman; 67 68 #define MAXLINELEN 8192 /* max line handled */ 69 70 int main __P((int, char **)); 71 void apropos __P((char **, char *, int)); 72 void lowstr __P((char *, char *)); 73 int match __P((char *, char *)); 74 void usage __P((void)); 75 76 int 77 main(argc, argv) 78 int argc; 79 char *argv[]; 80 { 81 ENTRY *ep; 82 TAG *tp; 83 int ch, rv; 84 char *conffile, **p, *p_augment, *p_path; 85 glob_t pg; 86 87 conffile = NULL; 88 p_augment = p_path = NULL; 89 while ((ch = getopt(argc, argv, "C:M:m:P:")) != -1) 90 switch (ch) { 91 case 'C': 92 conffile = optarg; 93 break; 94 case 'M': 95 case 'P': /* backward compatible */ 96 p_path = optarg; 97 break; 98 case 'm': 99 p_augment = optarg; 100 break; 101 case '?': 102 default: 103 usage(); 104 } 105 argv += optind; 106 argc -= optind; 107 108 if (argc < 1) 109 usage(); 110 111 if ((found = malloc((u_int)argc * sizeof(int))) == NULL) 112 err(1, "malloc"); 113 memset(found, 0, argc * sizeof(int)); 114 115 for (p = argv; *p; ++p) /* convert to lower-case */ 116 lowstr(*p, *p); 117 118 if (p_augment) 119 apropos(argv, p_augment, 1); 120 if (p_path || (p_path = getenv("MANPATH"))) 121 apropos(argv, p_path, 1); 122 else { 123 config(conffile); 124 ep = (tp = getlist("_whatdb")) == NULL ? 125 NULL : tp->list.tqh_first; 126 for (; ep != NULL; ep = ep->q.tqe_next) { 127 if (glob(ep->s, GLOB_BRACE | GLOB_NOSORT | GLOB_QUOTE, 128 NULL, &pg) != 0) 129 err(1, "glob"); 130 if (pg.gl_pathc) 131 for (p = pg.gl_pathv; *p; p++) 132 apropos(argv, *p, 0); 133 globfree(&pg); 134 } 135 } 136 137 if (!foundman) 138 errx(1, "no %s file found", _PATH_WHATIS); 139 140 rv = 1; 141 for (p = argv; *p; ++p) 142 if (found[p - argv]) 143 rv = 0; 144 else 145 (void)printf("%s: nothing appropriate\n", *p); 146 exit(rv); 147 } 148 149 void 150 apropos(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 if (!strchr(buf, '\n')) { 175 warnx("%s: line too long", name); 176 continue; 177 } 178 lowstr(buf, wbuf); 179 for (p = argv; *p; ++p) 180 if (match(wbuf, *p)) { 181 (void)printf("%s", buf); 182 found[p - argv] = 1; 183 184 /* only print line once */ 185 while (*++p) 186 if (match(wbuf, *p)) 187 found[p - argv] = 1; 188 break; 189 } 190 } 191 } 192 } 193 194 /* 195 * match -- 196 * match anywhere the string appears 197 */ 198 int 199 match(bp, str) 200 char *bp, *str; 201 { 202 int len; 203 char test; 204 205 if (!*bp) 206 return (0); 207 /* backward compatible: everything matches empty string */ 208 if (!*str) 209 return (1); 210 for (test = *str++, len = strlen(str); *bp;) 211 if (test == *bp++ && !strncmp(bp, str, len)) 212 return (1); 213 return (0); 214 } 215 216 /* 217 * lowstr -- 218 * convert a string to lower case 219 */ 220 void 221 lowstr(from, to) 222 char *from, *to; 223 { 224 char ch; 225 226 while ((ch = *from++) && ch != '\n') 227 *to++ = isupper(ch) ? tolower(ch) : ch; 228 *to = '\0'; 229 } 230 231 /* 232 * usage -- 233 * print usage message and die 234 */ 235 void 236 usage() 237 { 238 239 (void)fprintf(stderr, 240 "usage: apropos [-C file] [-M path] [-m path] keyword ...\n"); 241 exit(1); 242 } 243