usr/src/cmd/mailx/usg.local.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1998 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  28 /*        All Rights Reserved   */
  29
  30
  31 /*
  32  * University Copyright- Copyright (c) 1982, 1986, 1988
  33  * The Regents of the University of California
  34  * All Rights Reserved
  35  *
  36  * University Acknowledgment- Portions of this document are derived from
  37  * software developed by the University of California, Berkeley, and its
  38  * contributors.
  39  */
  40
  41 #pragma ident   "%Z%%M% %I%     %E% SMI"
  42
  43 /*
  44  * mailx -- a modified version of a University of California at Berkeley
  45  *      mail program
  46  *
  47  * Local routines that are installation dependent.
  48  */
  49
  50 #include "rcv.h"
  51
  52 static  int ismailbox(char *file);
  53
  54 /*
  55  * Locate the user's mailbox file (ie, the place where new, unread
  56  * mail is queued).  In SVr4 UNIX, it is in /var/mail/name.
  57  * In preSVr4 UNIX, it is in either /usr/mail/name or /usr/spool/mail/name.
  58  */
  59 void
  60 findmail(char *name)
  61 {
  62         register char *cp;
  63
  64         if (name != NOSTR) {
  65                 copy(name, copy(maildir, mailname));
  66                 issysmbox = 1;  /* it's a system mailbox */
  67         } else if ((cp = getenv("MAIL")) != NULL) {
  68                 /* if $MAIL is set, use it */
  69                 nstrcpy(mailname, PATHSIZE, cp);
  70                 issysmbox = ismailbox(mailname);
  71                 /* XXX - should warn that there's no locking? */
  72         } else {
  73                 copy(myname, copy(maildir, mailname));
  74                 issysmbox = 1;
  75         }
  76         if (issysmbox)
  77                 lockname = strrchr(mailname, '/') + 1;
  78 }
  79
  80 /*
  81  * Make sure file matches (/usr|/var)(/spool)?/mail/.
  82  * If is does, it's a "system mailbox", return true.
  83  */
  84 static int
  85 ismailbox(char *file)
  86 {
  87 #ifdef preSVr4
  88         return (strncmp(file, maildir, strlen(maildir)) == 0);
  89 #else
  90         if (strncmp(file, "/var", 4) != 0
  91             && strncmp(file, "/usr", 4) != 0
  92             )
  93                 return (0);
  94         file += 4;
  95         if (strncmp(file, "/spool", 6) == 0)
  96                 file += 6;
  97         return (strncmp(file, "/mail/", 6) == 0);
  98 #endif
  99 }