Add UUID functions to tct/flash/flash.sh

Function uuid2dev() converts UUID stored in $FILE
to corresponding /dev/sd*.

Syntax is:
    * uuid2dev $FILE
    * change_uuid $FILE $DEV_SDCARD

Change-Id: I5257c5ce888c441ba882fc65dd84a83d6c9e0317
Signed-off-by: Aleksander Mistewicz <a.mistewicz@samsung.com>

diff --git a/tct/flash/flash.sh b/tct/flash/flash.sh
new file mode 100755 (executable)
index 0000000..3d4b367
--- /dev/null
+++ b/tct/flash/flash.sh
@@ -0,0 +1,69 @@
+# Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Function uuid2dev() converts UUID stored in $FILE
+# to corresponding /dev/sd*.
+#
+# Syntax is:
+#   * uuid2dev $FILE
+#   * change_uuid $FILE $DEV_SDCARD
+#
+# Author: Aleksander Mistewicz <a.mistewicz@samsung.com>
+
+uuid2dev() {
+    FILE="$1"
+    test -n "${FILE}" || die "Missing argument: file!"
+    test -f "${FILE}" || die "${FILE} does not exist!"
+
+    UUID="`cat ${FILE}`"
+    DEV="`readlink /dev/disk/by-uuid/${UUID}`"
+    SLEEP=2
+
+    echo "Searching: ${UUID}" >&2
+
+    while [ -z "${DEV}" -a ${SLEEP} -le 30 ]
+    do
+        sleep "${SLEEP}"
+        SLEEP=$((SLEEP+2))
+        DEV="`readlink /dev/disk/by-uuid/${UUID}`"
+    done
+
+    test -n "${DEV}" || die "DEV is empty, device not found!"
+
+    DEV="${DEV##*/}"
+
+    echo "/dev/${DEV%[0-9]}"
+}
+
+change_uuid() {
+    FILE="$1"
+    DEV_SDCARD="$2"
+    test -n "${FILE}" || die "Missing argument: file!"
+    test -n "${DEV_SDCARD}" || die "Missing argument: dev_sdcard!"
+
+    NEW_UUID="`uuidgen`"
+    # 2nd partition is used because:
+    #   * 1st partition is vfat (boot)
+    #   * 3rd partition sometimes does not exists (i.e. wayland-efi)
+    PART="${DEV_SDCARD}2"
+
+    # remove uninit_bg option from filesystem for UUID change. result is:
+    #   * e2fsck is not required
+    #   * UUID change is successful
+    sudo tune2fs -O "^uninit_bg" "${PART}"
+    sudo tune2fs "${PART}" -U "${NEW_UUID}"
+    sudo tune2fs -O "+uninit_bg" "${PART}"
+
+    echo "${NEW_UUID}" > "${FILE}"
+}