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1 | /* |
2 | * Copyright (c) 1987 Regents of the University of California. | |
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3 | * All rights reserved. |
4 | * | |
f15db449 | 5 | * %sccs.include.redist.c% |
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6 | */ |
7 | ||
8 | #ifndef lint | |
9 | char copyright[] = | |
10 | "@(#) Copyright (c) 1987 Regents of the University of California.\n\ | |
11 | All rights reserved.\n"; | |
ea9afd82 | 12 | #endif /* not lint */ |
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13 | |
14 | #ifndef lint | |
f15db449 | 15 | static char sccsid[] = "@(#)apropos.c 5.12 (Berkeley) %G%"; |
ea9afd82 | 16 | #endif /* not lint */ |
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17 | |
18 | #include <sys/param.h> | |
19 | #include <stdio.h> | |
20 | #include <ctype.h> | |
38dde0cd | 21 | #include <string.h> |
c0eca3d4 | 22 | #include <stdlib.h> |
2f28d62a | 23 | #include "../man/pathnames.h" |
43f23b36 | 24 | |
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25 | #define MAXLINELEN 256 /* max line handled */ |
26 | ||
2f28d62a | 27 | char *progname; |
43f23b36 | 28 | |
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29 | static int *found, foundman; |
30 | ||
43f23b36 | 31 | main(argc, argv) |
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32 | int argc; |
33 | char **argv; | |
43f23b36 | 34 | { |
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35 | extern char *optarg; |
36 | extern int optind; | |
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37 | register char **p; |
38 | int ch; | |
c0eca3d4 | 39 | char *p_augment, *p_path, **getdb(); |
43f23b36 | 40 | |
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41 | progname = "apropos"; |
42 | p_augment = p_path = NULL; | |
43 | while ((ch = getopt(argc, argv, "M:m:P:")) != EOF) | |
43f23b36 | 44 | switch((char)ch) { |
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45 | case 'M': |
46 | case 'P': /* backward compatible */ | |
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47 | p_path = optarg; |
48 | break; | |
49 | case 'm': | |
50 | p_augment = optarg; | |
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51 | break; |
52 | case '?': | |
53 | default: | |
54 | usage(); | |
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55 | } |
56 | argv += optind; | |
57 | argc -= optind; | |
2f28d62a | 58 | |
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59 | if (argc < 1) |
60 | usage(); | |
61 | ||
43f23b36 | 62 | /*NOSTRICT*/ |
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63 | if (!(found = (int *)malloc((u_int)argc))) |
64 | enomem(); | |
c0eca3d4 | 65 | bzero((void *)found, argc * sizeof(int)); |
43f23b36 | 66 | |
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67 | for (p = argv; *p; ++p) /* convert to lower-case */ |
68 | lowstr(*p, *p); | |
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69 | |
70 | if (p_augment) | |
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71 | apropos(argv, p_augment, 1); |
72 | if (p_path || (p_path = getenv("MANPATH"))) | |
73 | apropos(argv, p_path, 1); | |
74 | else | |
75 | for (p = getdb(); *p; ++p) | |
76 | apropos(argv, *p, 0); | |
77 | ||
2f28d62a | 78 | if (!foundman) { |
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79 | (void)fprintf(stderr, |
80 | "apropos: : no %s file found.\n", _PATH_WHATIS); | |
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81 | exit(1); |
82 | } | |
83 | for (p = argv; *p; ++p) | |
84 | if (!found[p - argv]) | |
85 | (void)printf("%s: nothing appropriate\n", *p); | |
86 | } | |
87 | ||
c0eca3d4 | 88 | apropos(argv, path, buildpath) |
2f28d62a | 89 | char **argv, *path; |
c0eca3d4 | 90 | int buildpath; |
2f28d62a | 91 | { |
c0eca3d4 | 92 | register char *end, *name, **p; |
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93 | char buf[MAXLINELEN + 1], wbuf[MAXLINELEN + 1]; |
94 | ||
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95 | for (name = path; name; name = end) { /* through name list */ |
96 | if (end = index(name, ':')) | |
97 | *end++ = '\0'; | |
98 | ||
99 | if (buildpath) { | |
100 | char hold[MAXPATHLEN + 1]; | |
101 | ||
102 | (void)sprintf(hold, "%s/%s", name, _PATH_WHATIS); | |
103 | name = hold; | |
43f23b36 | 104 | } |
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105 | |
106 | if (!freopen(name, "r", stdin)) | |
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107 | continue; |
108 | ||
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109 | foundman = 1; |
110 | ||
9273b7be | 111 | /* for each file found */ |
c0eca3d4 | 112 | while (fgets(buf, sizeof(buf), stdin)) { |
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113 | if (!index(buf, '\n')) { |
114 | (void)fprintf(stderr, | |
c0eca3d4 | 115 | "apropos: %s line too long.\n", name); |
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116 | exit(1); |
117 | } | |
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118 | lowstr(buf, wbuf); |
119 | for (p = argv; *p; ++p) | |
120 | if (match(wbuf, *p)) { | |
2f28d62a | 121 | (void)printf("%s", buf); |
9273b7be | 122 | found[p - argv] = 1; |
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123 | |
124 | /* only print line once */ | |
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125 | while (*++p) |
126 | if (match(wbuf, *p)) | |
127 | found[p - argv] = 1; | |
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128 | break; |
129 | } | |
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130 | } |
131 | } | |
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132 | } |
133 | ||
76f1f97b | 134 | /* |
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135 | * match -- |
136 | * match anywhere the string appears | |
76f1f97b | 137 | */ |
9273b7be | 138 | match(bp, str) |
76f1f97b | 139 | register char *bp, *str; |
43f23b36 | 140 | { |
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141 | register int len; |
142 | register char test; | |
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143 | |
144 | if (!*bp) | |
9273b7be | 145 | return(0); |
76f1f97b | 146 | /* backward compatible: everything matches empty string */ |
43f23b36 | 147 | if (!*str) |
9273b7be | 148 | return(1); |
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149 | for (test = *str++, len = strlen(str); *bp;) |
150 | if (test == *bp++ && !strncmp(bp, str, len)) | |
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151 | return(1); |
152 | return(0); | |
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153 | } |
154 | ||
155 | /* | |
156 | * lowstr -- | |
157 | * convert a string to lower case | |
158 | */ | |
43f23b36 | 159 | lowstr(from, to) |
76f1f97b | 160 | register char *from, *to; |
43f23b36 | 161 | { |
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162 | register char ch; |
163 | ||
164 | while ((ch = *from++) && ch != '\n') | |
165 | *to++ = isupper(ch) ? tolower(ch) : ch; | |
166 | *to = '\0'; | |
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167 | } |
168 | ||
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169 | /* |
170 | * usage -- | |
171 | * print usage message and die | |
172 | */ | |
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173 | usage() |
174 | { | |
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175 | (void)fprintf(stderr, |
176 | "usage: apropos [-M path] [-m path] keyword ...\n"); | |
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177 | exit(1); |
178 | } |