usr/src/cmd/mailx/hostname.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  * Code to figure out what host we are on.
  48  */
  49
  50 #include "rcv.h"
  51 #include "configdefs.h"
  52 #include <sys/utsname.h>
  53 #include <locale.h>
  54
  55 #define MAILCNFG        "/etc/mail/mailcnfg"
  56
  57 char host[64];
  58 char domain[128];
  59 /*
  60  * Initialize the network name of the current host.
  61  */
  62 void
  63 inithost(void)
  64 {
  65         register struct netmach *np;
  66         struct utsname name;
  67         char *fp;
  68
  69         xsetenv(MAILCNFG);
  70         if (fp = xgetenv("CLUSTER")) {
  71                 nstrcpy(host, sizeof (host), fp);
  72         } else {
  73                 uname(&name);
  74                 nstrcpy(host, sizeof (host), name.nodename);
  75         }
  76         snprintf(domain, sizeof (domain), "%s%s", host, maildomain());
  77         for (np = netmach; np->nt_machine != 0; np++)
  78                 if (strcmp(np->nt_machine, EMPTY) == 0)
  79                         break;
  80         if (np->nt_machine == 0) {
  81                 printf(
  82                     gettext("Cannot find empty slot for dynamic host entry\n"));
  83                 exit(1);
  84         }
  85         np->nt_machine = host;
  86         np++;
  87         np->nt_machine = domain;
  88         if (debug) fprintf(stderr, "host '%s', domain '%s'\n", host, domain);
  89 }