xref: /freebsd/usr.bin/mail/temp.c (revision fcb560670601b2a4d87bb31d7531c8dcc37ee71b)
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
32 static char sccsid[] = "@(#)temp.c	8.1 (Berkeley) 6/6/93";
33 #endif
34 #endif /* not lint */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37 
38 #include "rcv.h"
39 #include "extern.h"
40 
41 /*
42  * Mail -- a mail program
43  *
44  * Give names to all the temporary files that we will need.
45  */
46 
47 char	*tmpdir;
48 
49 void
50 tinit(void)
51 {
52 	char *cp;
53 
54 	if ((tmpdir = getenv("TMPDIR")) == NULL || *tmpdir == '\0')
55 		tmpdir = _PATH_TMP;
56 	if ((tmpdir = strdup(tmpdir)) == NULL)
57 		errx(1, "Out of memory");
58 	/* Strip trailing '/' if necessary */
59 	cp = tmpdir + strlen(tmpdir) - 1;
60 	while (cp > tmpdir && *cp == '/') {
61 		*cp = '\0';
62 		cp--;
63 	}
64 
65 	/*
66 	 * It's okay to call savestr in here because main will
67 	 * do a spreserve() after us.
68 	 */
69 	if (myname != NULL) {
70 		if (getuserid(myname) < 0)
71 			errx(1, "\"%s\" is not a user of this system", myname);
72 	} else {
73 		if ((cp = username()) == NULL) {
74 			myname = "ubluit";
75 			if (rcvmode)
76 				errx(1, "Who are you!?");
77 		} else
78 			myname = savestr(cp);
79 	}
80 	if ((cp = getenv("HOME")) == NULL || *cp == '\0' ||
81 	    strlen(cp) >= PATHSIZE)
82 		homedir = NULL;
83 	else
84 		homedir = savestr(cp);
85 	if (debug)
86 		printf("user = %s, homedir = %s\n", myname,
87 		    homedir ? homedir : "NONE");
88 }
89