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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 | |
ade4c407 | 25 | static char sccsid[] = "@(#)whatis.c 5.3 (Berkeley) %G%"; |
9273b7be KB |
26 | #endif /* not lint */ |
27 | ||
28 | #include <sys/param.h> | |
29 | #include <stdio.h> | |
30 | #include <ctype.h> | |
31 | #include <strings.h> | |
ade4c407 | 32 | #include "pathnames.h" |
9273b7be | 33 | |
9273b7be KB |
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"))) | |
ade4c407 | 64 | manpath = _PATH_DEFAULT; |
9273b7be KB |
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; | |
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130 | for (start = bp++; |
131 | *bp && (*bp == '_' || isdigit(*bp) || isalpha(*bp)); ++bp); | |
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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 | } |