cros_utils: refine factory and imaging related scripts

mod_for_factory_scripts/500populateQualDbs

 #!/bin/bash
 
 # 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.
 
 TEST_DIR="${ROOT_FS_DIR}/usr/local/autotest/site_tests/hardware_Components"
 
-pushd ${TEST_DIR} 1> /dev/null
+pushd "${TEST_DIR}" >/dev/null

[Nick Sanders, 2010/11/18 05:12:08]

Can you check for existence of dir

[Hung-Te, 2010/11/18 05:49:31]

Just saw you've created another refine for that - I'll wait for yours and merge
with it.

[Nick Sanders, 2010/11/18 05:12:08]

Can you also clean 600xxx in mod_for_factory

[Hung-Te, 2010/11/18 05:49:31]

Added in latest CL.

 # Remove the DB directories belonging to other boards.
 KEEPDB="data_${BOARD}"
-ls -d data_* 2> /dev/null | grep -v ${KEEPDB} | xargs rm -fr
+ls -d data_* 2>/dev/null | grep -v "${KEEPDB}" | xargs rm -fr
 
-# Ensure there is DB directory in x86-agz and x86-mario.
-if [ ! -d ${KEEPDB} -a \
-    \( "${BOARD}" = "x86-agz" -o "${BOARD}" = "x86-mario" \) ]; then
-  echo "No component DB directory found at: ${KEEPDB}"
-fi
+# Ensure there is DB directory in authorized list
+case "${BOARD}" in
+  x86-agz | x86-mario )
+    if [ ! -d "${KEEPDB}" ]; then
+      echo "No component DB directory found at: ${KEEPDB}"
+      # TODO(hungte) should we exit as failure when the DB is missing?
+    fi
+    ;;
 
-popd 1> /dev/null
+  * )
+    # No need to check for unknown boards
+    true
+    ;;
+esac
+
+popd >/dev/null