1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1980, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #ifndef lint
33 #if 0
34 static char sccsid[] = "@(#)v7.local.c 8.1 (Berkeley) 6/6/93";
35 #endif
36 #endif /* not lint */
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD: stable/12/usr.bin/mail/v7.local.c 326025 2017-11-20 19:49:47Z pfg $");
39
40 /*
41 * Mail -- a mail program
42 *
43 * Version 7
44 *
45 * Local routines that are installation dependent.
46 */
47
48 #include "rcv.h"
49 #include <fcntl.h>
50 #include "extern.h"
51
52 /*
53 * Locate the user's mailbox file (ie, the place where new, unread
54 * mail is queued).
55 */
56 void
findmail(char * user,char * buf,int buflen)57 findmail(char *user, char *buf, int buflen)
58 {
59 char *tmp = getenv("MAIL");
60
61 if (tmp == NULL)
62 (void)snprintf(buf, buflen, "%s/%s", _PATH_MAILDIR, user);
63 else
64 (void)strlcpy(buf, tmp, buflen);
65 }
66
67 /*
68 * Get rid of the queued mail.
69 */
70 void
demail(void)71 demail(void)
72 {
73 int fd;
74
75 if (value("keep") != NULL || rm(mailname) < 0)
76 if ((fd = open(mailname, O_CREAT | O_TRUNC | O_WRONLY, 0600)) >=
77 0)
78 (void)close(fd);
79 }
80
81 /*
82 * Discover user login name.
83 */
84 char *
username(void)85 username(void)
86 {
87 char *np;
88 uid_t uid;
89
90 if ((np = getenv("USER")) != NULL)
91 return (np);
92 if ((np = getenv("LOGNAME")) != NULL)
93 return (np);
94 if ((np = getname(uid = getuid())) != NULL)
95 return (np);
96 printf("Cannot associate a name with uid %u\n", (unsigned)uid);
97 return (NULL);
98 }
99