Add randomize-mac

scripts/randomize-mac/if-post-down.d/randomize-mac

+#!/bin/sh
+# temporarily shut down an interface and randomize the mac,
+# requires the macchanger tool.
+#
+# place in /etc/network/if-post-down.d to renew the mac everytime
+# a network interface is brought down (recent versions of
+# NetworkManager no longer support if-pre-up.d)
+#
+# felix@tribut.de
+
+LOGFILE="`mktemp`"
+PRESTATE="`ip addr show dev \"$IFACE\" up 2>>\"$LOGFILE\"`"
+FAILED="0"
+
+date >> "$LOGFILE"
+echo "Running randomize-mac for interface '$IFACE'" >> "$LOGFILE"
+echo >> "$LOGFILE"
+
+[ -n "$PRESTATE" ] && ip link set dev "$IFACE" down >>"$LOGFILE" 2>&1
+macchanger -A "$IFACE" >>"$LOGFILE" 2>&1 || FAILED=1
+[ -n "$PRESTATE" ] && ip link set dev "$IFACE" up >>"$LOGFILE" 2>&1
+
+if [ "$FAILED" = "1" ]; then
+	cat "$LOGFILE" | mail -s "[`hostname`] macchanger failed" root
+fi
+
+rm -f "$LOGFILE"

scripts/randomize-mac/init/randomize-mac.conf

+# upstart script to run randomize-mac for a list of interfaces
+# place in /etc/init
+
+# felix@tribut.de
+
+description "Randomize MAC address on boot"
+start on starting network-manager
+
+pre-start script
+	export IFACE
+	for IFACE in eth0 wlan1; do
+		/etc/network/if-post-down.d/randomize-mac
+	done
+end script