v7.local.c revision 77274 
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: head/usr.bin/mail/v7.local.c 77274 2001-05-27 20:26:22Z mikeh $";
40#endif /* not lint */
41
42/*
43 * Mail -- a mail program
44 *
45 * Version 7
46 *
47 * Local routines that are installation dependent.
48 */
49
50#include "rcv.h"
51#include <fcntl.h>
52#include "extern.h"
53
54/*
55 * Locate the user's mailbox file (ie, the place where new, unread
56 * mail is queued).
57 */
58void
59findmail(user, buf, buflen)
60	char *user, *buf;
61	int buflen;
62{
63	char *tmp = getenv("MAIL");
64
65	if (tmp == NULL)
66		(void)snprintf(buf, buflen, "%s/%s", _PATH_MAILDIR, user);
67	else
68		(void)strlcpy(buf, tmp, buflen);
69}
70
71/*
72 * Get rid of the queued mail.
73 */
74void
75demail()
76{
77
78	if (value("keep") != NULL || rm(mailname) < 0)
79		(void)close(open(mailname, O_CREAT | O_TRUNC | O_WRONLY, 0600));
80}
81
82/*
83 * Discover user login name.
84 */
85char *
86username()
87{
88	char *np;
89	uid_t uid;
90
91	if ((np = getenv("USER")) != NULL)
92		return (np);
93	if ((np = getenv("LOGNAME")) != NULL)
94		return (np);
95	if ((np = getname(uid = getuid())) != NULL)
96		return (np);
97	printf("Cannot associate a name with uid %u\n", (unsigned)uid);
98	return (NULL);
99}
100