1/*
2 * Copyright (c) 1980, 1993
3 *	The Regents of the University of California.  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#if 0
36static char sccsid[] = "@(#)v7.local.c	8.1 (Berkeley) 6/6/93";
37#endif
38static const char rcsid[] =
39  "$FreeBSD: src/usr.bin/mail/v7.local.c,v 1.5 2002/06/30 05:25:06 obrien Exp $";
40#endif /* not lint */
41
42#include <sys/cdefs.h>
43
44/*
45 * Mail -- a mail program
46 *
47 * Version 7
48 *
49 * Local routines that are installation dependent.
50 */
51
52#include "rcv.h"
53#include <fcntl.h>
54#include "extern.h"
55
56/*
57 * Locate the user's mailbox file (ie, the place where new, unread
58 * mail is queued).
59 */
60void
61findmail(user, buf, buflen)
62	char *user, *buf;
63	int buflen;
64{
65	char *tmp = getenv("MAIL");
66
67	if (tmp == NULL)
68		(void)snprintf(buf, buflen, "%s/%s", _PATH_MAILDIR, user);
69	else
70		(void)strlcpy(buf, tmp, buflen);
71}
72
73/*
74 * Get rid of the queued mail.
75 */
76void
77demail()
78{
79
80	if (value("keep") != NULL || rm(mailname) < 0)
81		(void)close(open(mailname, O_CREAT | O_TRUNC | O_WRONLY, 0600));
82}
83
84/*
85 * Discover user login name.
86 */
87char *
88username()
89{
90	char *np;
91	uid_t uid;
92
93	if ((np = getenv("USER")) != NULL)
94		return (np);
95	if ((np = getenv("LOGNAME")) != NULL)
96		return (np);
97	if ((np = getname(uid = getuid())) != NULL)
98		return (np);
99	printf("Cannot associate a name with uid %u\n", (unsigned)uid);
100	return (NULL);
101}
102