1/*	$NetBSD: v7.local.c,v 1.17 2006/05/01 23:06:55 christos Exp $	*/
2
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#include <sys/cdefs.h>
33#ifndef lint
34#if 0
35static char sccsid[] = "@(#)v7.local.c	8.1 (Berkeley) 6/6/93";
36#else
37__RCSID("$NetBSD: v7.local.c,v 1.17 2006/05/01 23:06:55 christos Exp $");
38#endif
39#endif /* not lint */
40
41/*
42 * Mail -- a mail program
43 *
44 * Version 7
45 *
46 * Local routines that are installation dependent.
47 */
48
49#include "rcv.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 */
56PUBLIC void
57findmail(const char *user, char *buf, size_t bufsize)
58{
59	char *mbox;
60
61	if (!(mbox = getenv("MAIL")))
62		(void)snprintf(buf, bufsize, "%s/%s", _PATH_MAILDIR, user);
63	else
64		(void)strlcpy(buf, mbox, bufsize);
65}
66
67/*
68 * Get rid of the queued mail.
69 */
70PUBLIC void
71demail(void)
72{
73
74	int fd;
75	/*
76	 * Do not remove the spool file, just truncate it to zero
77	 * bytes if possible, since we wouldn't preserve
78	 * owner/permissions otherwise.
79	 */
80	if (value(ENAME_KEEP) != NULL || truncate(mailname, (off_t)0) < 0)
81		if ((fd = creat(mailname, 0600)) != -1)
82			(void)close(fd);
83}
84
85/*
86 * Discover user login name.
87 */
88PUBLIC const char *
89username(void)
90{
91	const char *np;
92	uid_t uid;
93
94	if ((np = getenv("USER")) != NULL)
95		return np;
96	if ((np = getname(uid = getuid())) != NULL)
97		return np;
98	(void)printf("Cannot associate a name with uid %u\n", (unsigned)uid);
99	return NULL;
100}
101