samba-tools: more reasonable defaults for samba-tool commands

- fallback to machine account where possible

- default to local hostname where this is reasonable

source4/scripting/python/samba/netcmd/common.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+#
+# common functions for samba-tool python commands
+#
+# Copyright Andrew Tridgell 2010
+#
+# 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 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+def netcmd_dnsname(lp):
+    '''return the full DNS name of our own host. Used as a default
+       for hostname when running status queries'''
+    return lp.get('netbios name').lower() + "." + lp.get('realm').lower()