1 /* $NetBSD: apropos.c,v 1.17 2002/03/08 20:23:10 jdolecek 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 1.17 2002/03/08 20:23:10 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 <limits.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 #include <man/config.h> 64 #include <man/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 : 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 apropos(argv, *p, 0); 137 globfree(&pg); 138 } 139 } 140 141 if (!foundman) 142 errx(1, "no %s file found", _PATH_WHATIS); 143 144 rv = 1; 145 for (p = argv; *p; ++p) 146 if (found[p - argv]) 147 rv = 0; 148 else 149 (void)printf("%s: nothing appropriate\n", *p); 150 exit(rv); 151 } 152 153 void 154 apropos(argv, path, buildpath) 155 char **argv, *path; 156 int buildpath; 157 { 158 char *end, *name, **p; 159 char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1]; 160 char hold[MAXPATHLEN + 1]; 161 162 for (name = path; name; name = end) { /* through name list */ 163 if ((end = strchr(name, ':'))) 164 *end++ = '\0'; 165 166 if (buildpath) { 167 (void)sprintf(hold, "%s/%s", name, _PATH_WHATIS); 168 name = hold; 169 } 170 171 if (!freopen(name, "r", stdin)) 172 continue; 173 174 foundman = 1; 175 176 /* for each file found */ 177 while (fgets(buf, sizeof(buf), stdin)) { 178 if (!strchr(buf, '\n')) { 179 warnx("%s: line too long", name); 180 continue; 181 } 182 lowstr(buf, wbuf); 183 for (p = argv; *p; ++p) 184 if (match(wbuf, *p)) { 185 (void)printf("%s", buf); 186 found[p - argv] = 1; 187 188 /* only print line once */ 189 while (*++p) 190 if (match(wbuf, *p)) 191 found[p - argv] = 1; 192 break; 193 } 194 } 195 } 196 } 197 198 /* 199 * match -- 200 * match anywhere the string appears 201 */ 202 int 203 match(bp, str) 204 char *bp, *str; 205 { 206 int len; 207 char test; 208 209 if (!*bp) 210 return (0); 211 /* backward compatible: everything matches empty string */ 212 if (!*str) 213 return (1); 214 for (test = *str++, len = strlen(str); *bp;) 215 if (test == *bp++ && !strncmp(bp, str, len)) 216 return (1); 217 return (0); 218 } 219 220 /* 221 * lowstr -- 222 * convert a string to lower case 223 */ 224 void 225 lowstr(from, to) 226 char *from, *to; 227 { 228 char ch; 229 230 while ((ch = *from++) && ch != '\n') 231 *to++ = isupper((unsigned char)ch) ? tolower(ch) : ch; 232 *to = '\0'; 233 } 234 235 /* 236 * usage -- 237 * print usage message and die 238 */ 239 void 240 usage() 241 { 242 243 (void)fprintf(stderr, 244 "Usage: %s [-C file] [-M path] [-m path] keyword ...\n", 245 getprogname()); 246 exit(1); 247 } 248