From f3041e0fb727c9b78684c85eaf64297cc9166e66 Mon Sep 17 00:00:00 2001
From: Jon Oster <jon@advancedtelematic.com>
Date: Wed, 31 May 2017 14:19:24 +0200
Subject: PRO-3202 Add a script to flash disk images

---
 meta-sota-raspberrypi/scripts/flash-image.sh | 127 +++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100755 meta-sota-raspberrypi/scripts/flash-image.sh

diff --git a/meta-sota-raspberrypi/scripts/flash-image.sh b/meta-sota-raspberrypi/scripts/flash-image.sh
new file mode 100755
index 0000000..74707bc
--- /dev/null
+++ b/meta-sota-raspberrypi/scripts/flash-image.sh
@@ -0,0 +1,127 @@
+#!/bin/bash
+
+ask() {
+    # http://djm.me/ask
+    local prompt default REPLY
+
+    while true; do
+
+        if [ "${2:-}" = "Y" ]; then
+            prompt="Y/n"
+            default=Y
+        elif [ "${2:-}" = "N" ]; then
+            prompt="y/N"
+            default=N
+        else
+            prompt="y/n"
+            default=
+        fi
+
+        # Ask the question (not using "read -p" as it uses stderr not stdout)
+        echo -n "$1 [$prompt] "
+
+        # Read the answer (use /dev/tty in case stdin is redirected from somewhere else)
+        read REPLY </dev/tty
+
+        # Default?
+        if [ -z "$REPLY" ]; then
+            REPLY=$default
+        fi
+
+        # Check if the reply is valid
+        case "$REPLY" in
+            Y*|y*) return 0 ;;
+            N*|n*) return 1 ;;
+        esac
+
+    done
+}
+
+if [[ $EUID -ne 0 ]]; then
+  echo ""
+  echo "  This script must be run as root" 1>&2
+  echo ""
+  exit 1
+fi
+
+if [ -z "$1" ]; then
+  echo ""
+  echo "   Flash a built image with an ATS Garage device config file baked in."
+  echo ""
+  echo "   Usage: ./flash-configured-image.sh device [imagefile] "
+  echo ""
+  echo ""
+  echo "    device     : The device name to flash. Must be a removable device."
+  echo "      Example: sdb"
+  echo ""
+  echo "    imagefile  : An image file generated by bitbake (optional)."
+  echo "      Default: ./tmp/deploy/images/raspberrypi3/rpi-basic-image-raspberrypi3.rpi-sdimg-ota"
+  echo ""
+  echo "   The following utilities are prerequisites:"
+  echo ""
+  echo "    dd"
+  echo "    parted"
+  echo "    e2fsck"
+  echo "    fdisk"
+  echo "    resize2fs"
+  echo ""
+  exit 1
+fi
+
+set -euo pipefail
+
+DEVICE_TO_FLASH=$1
+IMAGE_TO_FLASH="${2-tmp/deploy/images/raspberrypi3/rpi-basic-image-raspberrypi3.rpi-sdimg-ota}"
+DEVICE_IS_REMOVABLE=$(cat /sys/block/$DEVICE_TO_FLASH/removable)
+
+if [[ $DEVICE_IS_REMOVABLE != "1" ]]; then
+  echo ""
+  echo "  For safety, this script will only flash removable block devices."
+  echo ""
+  echo "  This check is implemented by reading /sys/block/$DEVICE_TO_FLASH/removable."
+  echo ""
+  exit 1
+fi
+
+echo " "
+echo "   Writing image file: $IMAGE_TO_FLASH "
+echo "   to device         : $DEVICE_TO_FLASH "
+echo " "
+if ask "Do you want to continue?" N; then
+    echo " "
+else
+    exit 1
+fi
+
+if [ ! -f "$IMAGE_TO_FLASH" ]; then
+  echo " "
+  echo "  Error: $IMAGE_TO_FLASH doesn't exist"
+  echo ""
+  exit 1
+fi
+
+echo "Unmounting all partitions on $DEVICE_TO_FLASH"
+umount /dev/$DEVICE_TO_FLASH* || true
+sleep 2
+
+echo "Writing image to $DEVICE_TO_FLASH..."
+dd if=$IMAGE_TO_FLASH of=/dev/$DEVICE_TO_FLASH bs=32M && sync
+sleep 2
+
+# It turns out there are card readers that give their partitions funny names, like
+# "/dev/mmcblk0" will be the device, but the partitions are called "/dev/mmcblk0p1"
+# for example. Better to just get the name of the partition after we flash it.
+SECOND_PARTITION=$(fdisk -l /dev/$DEVICE_TO_FLASH | tail -n 1 | awk '{print $1}')
+
+echo "Resizing rootfs partition to fill all of $DEVICE_TO_FLASH..."
+parted -s /dev/$DEVICE_TO_FLASH resizepart 2 '100%'
+sleep 2
+e2fsck -f $SECOND_PARTITION || true
+sleep 2
+
+echo "Resizing filesystem on $SECOND_PARTITION to match partition size..."
+resize2fs -p $SECOND_PARTITION
+sleep 2
+
+echo "Done!"
+
-- 
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