Exhaustive test for rollback code

tests/rbtest.conf

+# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Rollback code exhaustive test.
+#
+# INSTRUCTIONS.  Put this file in /etc/init.  Move /etc/init/tcsd.conf to
+# /etc/init/tcsd.confxxx to disable it.  Then boot with the device connected by
+# wired ethernet.  The test will start and reboot the host after every cycle.
+# Unplug the ethernet cable to stop testing.  If left alone, the test will stop
+# at the first failure or when all the states have been tested.
+#
+# Reminder: rollback_index_test only works with TPM-agnostic firmware.
+
+# Connecting to tcsd requires that "localhost" be reachable, so we wait for
+# flimflam to start, but that's not enough, and in the while loop below we also
+# wait for pinging to localhost to succeed.
+
+start on started flimflam
+
+script
+  cable=""
+  while [ "$cable" != "yes" ]; do
+    cable=$(/usr/sbin/ethtool eth0 | grep Link | cut -f 3 -d ' ')
+    logger "rbtest: cable is $cable"
+    ping -c 1 localhost || cable=""
+    sleep 2
+  done
+  # ideally we would like to issue a "stop tcsd", but this doesn't work
+  # (upstart race?) so we must manually disable tcsd.conf
+  ### stop tcsd
+  logger "starting rbtest"
+  /usr/bin/rollback_index_test > /tmp/rbtest.out 2>&1
+end script