Commit | Line | Data |
---|---|---|
c799ae2e WJ |
1 | /* |
2 | * Copyright (c) 1980, 1988 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #ifndef lint | |
35 | char copyright[] = | |
36 | "@(#) Copyright (c) 1980, 1988 The Regents of the University of California.\n\ | |
37 | All rights reserved.\n"; | |
38 | #endif /* not lint */ | |
39 | ||
40 | #ifndef lint | |
41 | static char sccsid[] = "@(#)from.c 5.7 (Berkeley) 3/1/91"; | |
42 | #endif /* not lint */ | |
43 | ||
44 | #include <sys/types.h> | |
45 | #include <ctype.h> | |
46 | #include <pwd.h> | |
47 | #include <stdio.h> | |
48 | #include <paths.h> | |
49 | ||
50 | main(argc, argv) | |
51 | int argc; | |
52 | char **argv; | |
53 | { | |
54 | extern char *optarg; | |
55 | extern int optind; | |
56 | struct passwd *pwd; | |
57 | int ch, newline; | |
58 | char *file, *sender, *p; | |
59 | #if MAXPATHLEN > BUFSIZ | |
60 | char buf[MAXPATHLEN]; | |
61 | #else | |
62 | char buf[BUFSIZ]; | |
63 | #endif | |
64 | ||
65 | file = sender = NULL; | |
66 | while ((ch = getopt(argc, argv, "f:s:")) != EOF) | |
67 | switch((char)ch) { | |
68 | case 'f': | |
69 | file = optarg; | |
70 | break; | |
71 | case 's': | |
72 | sender = optarg; | |
73 | for (p = sender; *p; ++p) | |
74 | if (isupper(*p)) | |
75 | *p = tolower(*p); | |
76 | break; | |
77 | case '?': | |
78 | default: | |
79 | fprintf(stderr, "usage: from [-f file] [-s sender] [user]\n"); | |
80 | exit(1); | |
81 | } | |
82 | argv += optind; | |
83 | ||
84 | if (!file) { | |
85 | if (!(file = *argv)) { | |
86 | if (!(pwd = getpwuid(getuid()))) { | |
87 | fprintf(stderr, | |
88 | "from: no password file entry for you.\n"); | |
89 | exit(1); | |
90 | } | |
91 | file = pwd->pw_name; | |
92 | } | |
93 | (void)sprintf(buf, "%s/%s", _PATH_MAILDIR, file); | |
94 | file = buf; | |
95 | } | |
96 | if (!freopen(file, "r", stdin)) { | |
97 | fprintf(stderr, "from: can't read %s.\n", file); | |
98 | exit(1); | |
99 | } | |
100 | for (newline = 1; fgets(buf, sizeof(buf), stdin);) { | |
101 | if (*buf == '\n') { | |
102 | newline = 1; | |
103 | continue; | |
104 | } | |
105 | if (newline && !strncmp(buf, "From ", 5) && | |
106 | (!sender || match(buf + 5, sender))) | |
107 | printf("%s", buf); | |
108 | newline = 0; | |
109 | } | |
110 | exit(0); | |
111 | } | |
112 | ||
113 | match(line, sender) | |
114 | register char *line, *sender; | |
115 | { | |
116 | register char ch, pch, first, *p, *t; | |
117 | ||
118 | for (first = *sender++;;) { | |
119 | if (isspace(ch = *line)) | |
120 | return(0); | |
121 | ++line; | |
122 | if (isupper(ch)) | |
123 | ch = tolower(ch); | |
124 | if (ch != first) | |
125 | continue; | |
126 | for (p = sender, t = line;;) { | |
127 | if (!(pch = *p++)) | |
128 | return(1); | |
129 | if (isupper(ch = *t++)) | |
130 | ch = tolower(ch); | |
131 | if (ch != pch) | |
132 | break; | |
133 | } | |
134 | } | |
135 | /* NOTREACHED */ | |
136 | } |