Add script to remove boot0 and make the device unbootable.

Author: ayufan

package/root/usr/local/sbin/pine64_install_to_emmc.sh

@@ -115,5 +115,7 @@ echo "Downloading and writing to /dev/mmcblk1..."
 curl -L -f "$DOWNLOAD_URL" | $ARCHIVER | dd bs=30M of=/dev/mmcblk1
 sync
 echo ""
+echo "You may want to run now pine64_remove_boot.sh to make the current device unbootable."
+echo ""
 
 echo "Done."

package/root/usr/local/sbin/pine64_remove_boot.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+
+set -eo pipefail
+
+if [[ "$(id -u)" -ne "0" ]]; then
+	echo "This script requires root."
+	exit 1
+fi
+
+echo "Pine A64/Pinebook boot remover!"
+echo "(C) 2017. Kamil Trzciński (https://ayufan.eu)."
+echo ""
+echo "The purpose of this script is to remove boot0 and make the disk unbootable."
+echo ""
+
+usage() {
+    echo "Usage:"
+    echo "$ $0 [disk]"
+    echo ""
+    echo "If no disk is specified the /dev/mmcblk0 will be used."
+    exit 1
+}
+
+if [[ $# -ne 1 ]] && [[ $# -ne 2 ]]; then
+    usage
+fi
+
+DISK="${1-/dev/mmcblk0}"
+
+echo "Doing this will make the "$DISK" unbootable."
+
+while true; do
+    echo "Type YES to continue or Ctrl-C to abort."
+    read CONFIRM
+    if [[ "$CONFIRM" == "YES" ]]; then
+        break
+    fi
+done
+
+echo ""
+dd conv=notrunc bs=1k seek=8 count=32 oflag=direct if=/dev/zero of="$DISK"
+
+echo "Done."