r21224: Initial checkin of cifs_host_name resolver helper script

(needed by /sbin keyctl utils to finish the upcall)
(This used to be commit 738d29dbcc)

source3/client/cifs_resolver.sh

@@ -0,0 +1,51 @@
+#!/bin/sh
+###############################################################################
+#
+# Written by Igor Mammedov (niallain@gmail.com)
+# Modified by Steve French <sfrench@samba.org>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version
+# 2 of the License, or (at your option) any later version.
+#
+###############################################################################
+#
+# linux-cifs-client dns name resolver helper
+#     called by cifs kernel module upcall to key API to resolve server name 
+#     to IP when module connects to DFS link.  We may eventually make this
+#     C code, but this is a good starting point.
+#     You should have appropriate kernel and keyutils installed.
+#     CIFS DFS Support will require Linux kernel module 
+#	cifs.ko version 1.48 or later.      
+#
+#     Consult the CIFS client users guide for more details
+#	 http://www.samba.org/samba/ftp/cifs-cvs/linux-cifs-client-guide.pdf
+#
+# Put the following string in /etc/request-key.conf without comment sign :)
+#    create  cifs_resolver   *       *           /sbin/cifs_resolver.sh %k %d %S
+#
+# Put this script into /sbin directory
+# Call:  /sbin/cifs_resolver.sh <keyid> <desc> <session-keyring>
+#
+#     <desc> - is server name to resolve
+#
+
+status=0
+{
+    echo "cifs_resolver: resolving: $2"
+
+    DATAA=`/usr/bin/host $2`
+    status=$?
+
+    if [ "x$status" != "x0" ]; then
+	    echo "cifs_resolver: failed to resolve: $2"
+	    exit $status
+    else 
+	    DATAA=`echo "$DATAA" | sed 's/.*has address //'`
+	    echo "cifs_resolver: resolved: $2 to $DATAA"
+	    keyctl instantiate $1 "$DATAA" $3 || exit 1
+    fi
+
+} >&/dev/ttyS0
+exit $status