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 /*
33 * Mail -- a mail program
34 *
35 * Version 7
36 *
37 * Local routines that are installation dependent.
38 */
39
40 #include "rcv.h"
41 #include <fcntl.h>
42 #include "extern.h"
43
44 /*
45 * Locate the user's mailbox file (ie, the place where new, unread
46 * mail is queued).
47 */
48 void
findmail(char * user,char * buf,int buflen)49 findmail(char *user, char *buf, int buflen)
50 {
51 char *tmp = getenv("MAIL");
52
53 if (tmp == NULL)
54 (void)snprintf(buf, buflen, "%s/%s", _PATH_MAILDIR, user);
55 else
56 (void)strlcpy(buf, tmp, buflen);
57 }
58
59 /*
60 * Get rid of the queued mail.
61 */
62 void
demail(void)63 demail(void)
64 {
65 int fd;
66
67 if (value("keep") != NULL || rm(mailname) < 0)
68 if ((fd = open(mailname, O_CREAT | O_TRUNC | O_WRONLY, 0600)) >=
69 0)
70 (void)close(fd);
71 }
72
73 /*
74 * Discover user login name.
75 */
76 char *
username(void)77 username(void)
78 {
79 char *np;
80 uid_t uid;
81
82 if ((np = getenv("USER")) != NULL)
83 return (np);
84 if ((np = getenv("LOGNAME")) != NULL)
85 return (np);
86 if ((np = getname(uid = getuid())) != NULL)
87 return (np);
88 printf("Cannot associate a name with uid %u\n", (unsigned)uid);
89 return (NULL);
90 }
91