usr.bin/mail/temp.c

   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 }