Implemented update feature

how-to-create-encrypted-paper-backup/update.sh

@@ -0,0 +1,105 @@
+#! /bin/bash
+
+set -e
+set -o pipefail
+
+if [ "$1" = "--help" ]; then
+  printf "%s\n" "Usage: update.sh"
+  exit 0
+fi
+
+bold=$(tput bold)
+red=$(tput setaf 1)
+normal=$(tput sgr0)
+
+basedir=$(dirname "$0")
+
+dev="/dev/sda1"
+tmp="/tmp/pi"
+usb="/tmp/usb"
+
+tput reset
+
+wait_for_usb_flash_drive () {
+  if [ ! -e $dev ]; then
+    printf "$bold%s$normal" "Insert USB flash drive and press enter"
+    read -r confirmation
+    wait_for_usb_flash_drive
+  fi
+}
+
+wait_for_usb_flash_drive
+
+sudo mkdir -p $usb
+
+if ! mount | grep $dev > /dev/null; then
+  sudo mount $dev $usb --options uid=pi,gid=pi
+fi
+
+printf "$bold%s$normal\n" "Please type current date (ISO 8601 format) and press enter"
+read -r current_date
+
+if [[ "$current_date" =~ ^\d{4}-\d{2}-\d{2}$ ]]; then
+  printf "$bold$red%s$normal\n" "Invalid date"
+  exit 1
+fi
+
+sudo timedatectl set-timezone America/Montreal
+sudo date --set="$current_date"
+
+gpg --import /home/pi/sunknudsen.asc
+
+update=$(ls -t $usb/pi-qr-update-*-*-*.zip | head -1  || echo "")
+
+if [ -z "$update" ]; then
+  printf "$bold$red%s$normal\n" "Update archive not found"
+  exit 1
+fi
+
+update_sig=$(ls -t $update.sig | head -1 || echo "")
+
+if [ -z "$update_sig" ]; then
+  printf "$bold$red%s$normal\n" "Update signature not found"
+  exit 1
+fi
+
+printf "%s\n" "Verifying integrity of update…"
+
+gpg --verify $update_sig
+
+printf "%s\n" "Decompressing update…"
+
+unzip -d $tmp -o $update
+
+update_dir=$tmp/$(basename $update .zip)
+
+sudo mount -o rw,remount /
+sudo mount -o rw,remount /boot
+
+printf "%s\n" "Updating…"
+
+cd $update_dir
+
+./run.sh
+
+printf "%s\n" "Done"
+
+coutdown() {
+  tput rc
+  tput ed
+  second_s="seconds"
+  if [ "$1" = "1" ]; then
+    second_s="second"
+  fi
+  printf "$bold%s$normal" "Rebooting in $1 $second_s"
+}
+
+tput sc
+
+for ((index=10; index > 0; index--))
+do
+  coutdown $index
+  sleep 1
+done
+
+sudo systemctl reboot