1 /* 2 * Copyright (c) 1987 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 char copyright[] = 20 "@(#) Copyright (c) 1987 Regents of the University of California.\n\ 21 All rights reserved.\n"; 22 #endif /* not lint */ 23 24 #ifndef lint 25 static char sccsid[] = "@(#)whatis.c 5.2 (Berkeley) 09/19/88"; 26 #endif /* not lint */ 27 28 #include <sys/param.h> 29 #include <stdio.h> 30 #include <ctype.h> 31 #include <strings.h> 32 33 #define DEF_PATH "/usr/man:/usr/new/man:/usr/local/man" 34 #define MAXLINELEN 1000 /* max line handled */ 35 #define WHATIS "whatis" /* database name */ 36 37 main(argc, argv) 38 int argc; 39 char **argv; 40 { 41 extern char *optarg; 42 extern int optind; 43 register char *beg, *end, **p; 44 int ch, foundman = 0, *found; 45 char *manpath, buf[MAXLINELEN + 1], fname[MAXPATHLEN + 1]; 46 char wbuf[MAXLINELEN + 1], *getenv(), *malloc(); 47 48 while ((ch = getopt(argc, argv, "M:P:")) != EOF) 49 switch((char)ch) { 50 case 'M': 51 case 'P': /* backward compatible */ 52 manpath = optarg; 53 break; 54 case '?': 55 default: 56 usage(); 57 } 58 argv += optind; 59 argc -= optind; 60 if (argc < 1) 61 usage(); 62 63 if (!(manpath = getenv("MANPATH"))) 64 manpath = DEF_PATH; 65 66 /*NOSTRICT*/ 67 if (!(found = (int *)malloc((u_int)argc))) { 68 fprintf(stderr, "whatis: out of space.\n"); 69 exit(1); 70 } 71 bzero((char *)found, argc * sizeof(int)); 72 73 for (p = argv; *p; ++p) /* trim full paths */ 74 if (beg = rindex(*p, '/')) 75 *p = beg + 1; 76 77 for (beg = manpath; beg; beg = end) { /* through path list */ 78 end = index(beg, ':'); 79 if (!end) 80 (void)sprintf(fname, "%s/%s", beg, WHATIS); 81 else { 82 (void)sprintf(fname, "%.*s/%s", end - beg, beg, WHATIS); 83 ++end; 84 } 85 if (!freopen(fname, "r", stdin)) 86 continue; 87 88 /* for each file found */ 89 for (foundman = 1; fgets(buf, sizeof(buf), stdin);) { 90 dashtrunc(buf, wbuf); 91 for (p = argv; *p; ++p) 92 if (match(wbuf, *p)) { 93 printf("%s", buf); 94 found[p - argv] = 1; 95 96 /* only print line once */ 97 while (*++p) 98 if (match(wbuf, *p)) 99 found[p - argv] = 1; 100 break; 101 } 102 } 103 } 104 if (!foundman) { 105 fprintf(stderr, "whatis: no %s file found in %s.\n", 106 WHATIS, manpath); 107 exit(1); 108 } 109 for (p = argv; *p; ++p) 110 if (!found[p - argv]) 111 printf("%s: not found\n", *p); 112 } 113 114 /* 115 * match -- 116 * match a full word 117 */ 118 match(bp, str) 119 register char *bp, *str; 120 { 121 register int len; 122 register char *start; 123 124 if (!*str || !*bp) 125 return(0); 126 for (len = strlen(str);;) { 127 for (; *bp && !isdigit(*bp) && !isalpha(*bp); ++bp); 128 if (!*bp) 129 break; 130 for (start = bp++; 131 *bp && (*bp == '_' || isdigit(*bp) || isalpha(*bp)); ++bp); 132 if (bp - start == len && !strncasecmp(start, str, len)) 133 return(1); 134 } 135 return(0); 136 } 137 138 /* 139 * dashtrunc -- 140 * truncate a string at " - " 141 */ 142 dashtrunc(from, to) 143 register char *from, *to; 144 { 145 register int ch; 146 147 for (; (ch = *from) && ch != '\n' && 148 (ch != ' ' || from[1] != '-' || from[2] != ' '); ++from) 149 *to++ = ch; 150 *to = '\0'; 151 } 152 153 /* 154 * usage -- 155 * print usage message and die 156 */ 157 usage() 158 { 159 fprintf(stderr, "usage: whatis [-M path] string ...\n"); 160 exit(1); 161 } 162