--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usr/src/cmd/mailx/hostname.c	Tue Jun 02 18:56:50 2009 +0900
@@ -0,0 +1,89 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 1998 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+
+/*
+ * University Copyright- Copyright (c) 1982, 1986, 1988
+ * The Regents of the University of California
+ * All Rights Reserved
+ *
+ * University Acknowledgment- Portions of this document are derived from
+ * software developed by the University of California, Berkeley, and its
+ * contributors.
+ */
+
+#pragma ident	"@(#)hostname.c	1.14	05/06/08 SMI"
+
+/*
+ * mailx -- a modified version of a University of California at Berkeley
+ *	mail program
+ *
+ * Code to figure out what host we are on.
+ */
+
+#include "rcv.h"
+#include "configdefs.h"
+#include <sys/utsname.h>
+#include <locale.h>
+
+#define	MAILCNFG	"/etc/mail/mailcnfg"
+
+char host[64];
+char domain[128];
+/*
+ * Initialize the network name of the current host.
+ */
+void 
+inithost(void)
+{
+	register struct netmach *np;
+	struct utsname name;
+	char *fp;
+
+	xsetenv(MAILCNFG);
+	if (fp = xgetenv("CLUSTER")) {
+		nstrcpy(host, sizeof (host), fp);
+	} else {
+		uname(&name);
+		nstrcpy(host, sizeof (host), name.nodename);
+	}
+	snprintf(domain, sizeof (domain), "%s%s", host, maildomain());
+	for (np = netmach; np->nt_machine != 0; np++)
+		if (strcmp(np->nt_machine, EMPTY) == 0)
+			break;
+	if (np->nt_machine == 0) {
+		printf(
+		    gettext("Cannot find empty slot for dynamic host entry\n"));
+		exit(1);
+	}
+	np->nt_machine = host;
+	np++;
+	np->nt_machine = domain;
+	if (debug) fprintf(stderr, "host '%s', domain '%s'\n", host, domain);
+}