v7.local.c revision 331722 
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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef lint
31#if 0
32static char sccsid[] = "@(#)v7.local.c	8.1 (Berkeley) 6/6/93";
33#endif
34#endif /* not lint */
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: stable/11/usr.bin/mail/v7.local.c 331722 2018-03-29 02:50:57Z eadler $");
37
38/*
39 * Mail -- a mail program
40 *
41 * Version 7
42 *
43 * Local routines that are installation dependent.
44 */
45
46#include "rcv.h"
47#include <fcntl.h>
48#include "extern.h"
49
50/*
51 * Locate the user's mailbox file (ie, the place where new, unread
52 * mail is queued).
53 */
54void
55findmail(char *user, char *buf, int buflen)
56{
57	char *tmp = getenv("MAIL");
58
59	if (tmp == NULL)
60		(void)snprintf(buf, buflen, "%s/%s", _PATH_MAILDIR, user);
61	else
62		(void)strlcpy(buf, tmp, buflen);
63}
64
65/*
66 * Get rid of the queued mail.
67 */
68void
69demail(void)
70{
71	int fd;
72
73	if (value("keep") != NULL || rm(mailname) < 0)
74		if ((fd = open(mailname, O_CREAT | O_TRUNC | O_WRONLY, 0600)) >=
75		    0)
76			(void)close(fd);
77}
78
79/*
80 * Discover user login name.
81 */
82char *
83username(void)
84{
85	char *np;
86	uid_t uid;
87
88	if ((np = getenv("USER")) != NULL)
89		return (np);
90	if ((np = getenv("LOGNAME")) != NULL)
91		return (np);
92	if ((np = getname(uid = getuid())) != NULL)
93		return (np);
94	printf("Cannot associate a name with uid %u\n", (unsigned)uid);
95	return (NULL);
96}
97