v7.local.c

   1 /*
   2  * Heirloom mailx - a mail user agent derived from Berkeley Mail.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  */
   6 /*
   7  * Copyright (c) 1980, 1993
   8  *      The Regents of the University of California.  All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the University of
  21  *      California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #ifndef lint
  40 #ifdef  DOSCCS
  41 static char sccsid[] = "@(#)v7.local.c  2.10 (gritter) 3/4/06";
  42 #endif
  43 #endif /* not lint */
  44
  45 /*
  46  * Mail -- a mail program
  47  *
  48  * Version 7
  49  *
  50  * Local routines that are installation dependent.
  51  */
  52
  53 #include "rcv.h"
  54 #include "extern.h"
  55 #include <sys/stat.h>
  56 #include <fcntl.h>
  57 #include <unistd.h>
  58
  59 /*
  60  * Locate the user's mailbox file (ie, the place where new, unread
  61  * mail is queued).
  62  */
  63 void
  64 findmail(char *user, int force, char *buf, int size)
  65 {
  66         char *mbox, *cp;
  67
  68         if (strcmp(user, myname) == 0 && !force &&
  69                         (cp = value("folder")) != NULL &&
  70                         which_protocol(cp) == PROTO_IMAP) {
  71                 snprintf(buf, size, "%s/INBOX", protbase(cp));
  72         } else if (force || (mbox = value("MAIL")) == NULL) {
  73                 snprintf(buf, size, "%s/%s", MAILSPOOL, user);
  74         } else {
  75                 strncpy(buf, mbox, size);
  76                 buf[size-1]='\0';
  77         }
  78 }
  79
  80 /*
  81  * Get rid of the queued mail.
  82  */
  83 void
  84 demail(void)
  85 {
  86
  87         if (value("keep") != NULL || rm(mailname) < 0)
  88                 close(creat(mailname, 0600));
  89 }
  90
  91 /*
  92  * Discover user login name.
  93  */
  94 char *
  95 username(void)
  96 {
  97         char *np;
  98         uid_t uid;
  99
 100         if ((np = getenv("USER")) != NULL)
 101                 return np;
 102         if ((np = getname(uid = getuid())) != NULL)
 103                 return np;
 104         printf(catgets(catd, CATSET, 201,
 105                 "Cannot associate a name with uid %d\n"), (int)uid);
 106         return NULL;
 107 }