Annotation of src/usr.bin/from/from.c, Revision 1.9
1.9 ! millert 1: /* $OpenBSD: from.c,v 1.8 2001/11/19 19:02:14 mpech Exp $ */
1.1 deraadt 2: /* $NetBSD: from.c,v 1.6 1995/09/01 01:39:10 jtc Exp $ */
3:
4: /*
5: * Copyright (c) 1980, 1988, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.9 ! millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #ifndef lint
34: static char copyright[] =
35: "@(#) Copyright (c) 1980, 1988, 1993\n\
36: The Regents of the University of California. All rights reserved.\n";
37: #endif /* not lint */
38:
39: #ifndef lint
40: #if 0
41: static char sccsid[] = "@(#)from.c 8.1 (Berkeley) 6/6/93";
42: #endif
1.9 ! millert 43: static char rcsid[] = "$OpenBSD: from.c,v 1.8 2001/11/19 19:02:14 mpech Exp $";
1.1 deraadt 44: #endif /* not lint */
45:
46: #include <sys/types.h>
47: #include <ctype.h>
48: #include <pwd.h>
49: #include <stdio.h>
50: #include <stdlib.h>
51: #include <unistd.h>
52: #include <paths.h>
1.7 deraadt 53: #include <string.h>
1.4 mickey 54: #include <err.h>
1.1 deraadt 55:
1.7 deraadt 56: int match(char *, char *);
57:
58: int
1.1 deraadt 59: main(argc, argv)
60: int argc;
61: char **argv;
62: {
63: extern char *optarg;
64: extern int optind;
65: struct passwd *pwd;
66: int ch, newline;
67: char *file, *sender, *p;
68: #if MAXPATHLEN > BUFSIZ
69: char buf[MAXPATHLEN];
70: #else
71: char buf[BUFSIZ];
72: #endif
73:
74: file = sender = NULL;
1.3 millert 75: while ((ch = getopt(argc, argv, "f:s:")) != -1)
1.1 deraadt 76: switch((char)ch) {
77: case 'f':
78: file = optarg;
79: break;
80: case 's':
81: sender = optarg;
82: for (p = sender; *p; ++p)
83: if (isupper(*p))
84: *p = tolower(*p);
85: break;
86: case '?':
87: default:
88: fprintf(stderr, "usage: from [-f file] [-s sender] [user]\n");
89: exit(1);
90: }
91: argv += optind;
92:
93: /*
94: * We find the mailbox by:
95: * 1 -f flag
96: * 2 user
97: * 2 MAIL environment variable
98: * 3 _PATH_MAILDIR/file
99: */
100: if (!file) {
101: if (!(file = *argv)) {
102: if (!(file = getenv("MAIL"))) {
1.4 mickey 103: if (!(pwd = getpwuid(getuid())))
104: errx(1, "no password file entry for you");
1.7 deraadt 105: if ((file = getenv("USER"))) {
1.5 aaron 106: (void)snprintf(buf, sizeof(buf),
107: "%s/%s", _PATH_MAILDIR, file);
1.1 deraadt 108: file = buf;
109: } else
1.5 aaron 110: (void)snprintf(file = buf, sizeof(buf),
111: "%s/%s", _PATH_MAILDIR,
112: pwd->pw_name);
1.1 deraadt 113: }
114: } else {
1.5 aaron 115: (void)snprintf(buf, sizeof(buf), "%s/%s",
116: _PATH_MAILDIR, file);
1.1 deraadt 117: file = buf;
118: }
119: }
1.4 mickey 120: if (!freopen(file, "r", stdin))
1.6 millert 121: err(1, "%s", file);
1.1 deraadt 122: for (newline = 1; fgets(buf, sizeof(buf), stdin);) {
123: if (*buf == '\n') {
124: newline = 1;
125: continue;
126: }
127: if (newline && !strncmp(buf, "From ", 5) &&
128: (!sender || match(buf + 5, sender)))
129: printf("%s", buf);
130: newline = 0;
131: }
132: exit(0);
133: }
134:
1.7 deraadt 135: int
1.1 deraadt 136: match(line, sender)
1.7 deraadt 137: char *line, *sender;
1.1 deraadt 138: {
1.8 mpech 139: char ch, pch, first, *p, *t;
1.1 deraadt 140:
141: for (first = *sender++;;) {
142: if (isspace(ch = *line))
143: return(0);
144: ++line;
145: if (isupper(ch))
146: ch = tolower(ch);
147: if (ch != first)
148: continue;
149: for (p = sender, t = line;;) {
150: if (!(pch = *p++))
151: return(1);
152: if (isupper(ch = *t++))
153: ch = tolower(ch);
154: if (ch != pch)
155: break;
156: }
157: }
158: /* NOTREACHED */
159: }
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