A wrapper for df* plugins

diff --git a/modules/munin-node/files/df-wrap b/modules/munin-node/files/df-wrap
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+#!/bin/sh
+
+# Calls the appropriate df plugin while filtering out short-lived entries
+# like the sbuild/schroot filesystems.
+
+# Copyright 2011 Peter Palfrader
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+case "${0##*/}" in
+       df)             plugin=/usr/share/munin/plugins/df ;;
+       df_abs)         plugin=/usr/share/munin/plugins/df_abs ;;
+       df_node)        plugin=/usr/share/munin/plugins/df_inode ;;
+       *)              echo >&2 "$0: Do not know which plugin to call based on script name."; exit 1 ;;
+esac
+
+"$plugin" "$@" | egrep -v '^_dev\.|^_run|^_lib_init_rw|_sbuild_|_schroot_'