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  * 3. 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  * @(#)temp.c   8.1 (Berkeley) 6/6/93
  30  * $FreeBSD: src/usr.bin/mail/temp.c,v 1.6.2.3 2003/01/06 05:46:04 mikeh Exp $
  31  * $DragonFly: src/usr.bin/mail/temp.c,v 1.3 2003/10/04 20:36:48 hmp Exp $
  32  */
  33
  34 #include "rcv.h"
  35 #include "extern.h"
  36
  37 /*
  38  * Mail -- a mail program
  39  *
  40  * Give names to all the temporary files that we will need.
  41  */
  42
  43 char    *tmpdir;
  44
  45 void
  46 tinit(void)
  47 {
  48         char *cp;
  49
  50         if ((tmpdir = getenv("TMPDIR")) == NULL || *tmpdir == '\0')
  51                 tmpdir = _PATH_TMP;
  52         if ((tmpdir = strdup(tmpdir)) == NULL)
  53                 errx(1, "Out of memory");
  54         /* Strip trailing '/' if necessary */
  55         cp = tmpdir + strlen(tmpdir) - 1;
  56         while (cp > tmpdir && *cp == '/') {
  57                 *cp = '\0';
  58                 cp--;
  59         }
  60
  61         /*
  62          * It's okay to call savestr in here because main will
  63          * do a spreserve() after us.
  64          */
  65         if (myname != NULL) {
  66                 if (getuserid(myname) < 0)
  67                         errx(1, "\"%s\" is not a user of this system", myname);
  68         } else {
  69                 if ((cp = username()) == NULL) {
  70                         myname = "ubluit";
  71                         if (rcvmode)
  72                                 errx(1, "Who are you!?");
  73                 } else
  74                         myname = savestr(cp);
  75         }
  76         if ((cp = getenv("HOME")) == NULL || *cp == '\0' ||
  77             strlen(cp) >= PATHSIZE)
  78                 homedir = NULL;
  79         else
  80                 homedir = savestr(cp);
  81         if (debug)
  82                 printf("user = %s, homedir = %s\n", myname,
  83                     homedir ? homedir : "NONE");
  84 }