update.sh

   1 #!/bin/bash
   2
   3 if [[ ! -e "/dev/sda1" ]]; then
   4  exit 1
   5 fi
   6
   7 printf "Found USB... "
   8
   9 umount /dev/sda1 > /dev/null 2>&1
  10 # The {} does NOT spawn a new subshell, so the exit kills this script.
  11 mount /dev/sda1 > /dev/null 2>&1 || { printf "Mount failure\n"; exit 1; }
  12
  13 printf "\t\tMount OK\n"
  14
  15 if [[ -e "/mnt/usb-update/config.ini" ]]; then
  16   printf "Found config.ini... "
  17   (cp /mnt/usb-update/config.ini /home/pi/hdmi-switcher > /dev/null 2>&1 && printf "\tCopy OK\n") || printf "\tCopy failure\n"
  18 fi
  19
  20 if [[ -e "/mnt/usb-update/video.mp4" ]]; then
  21   printf "Found video.mp4... "
  22   (cp /mnt/usb-update/video.mp4 /home/pi/hdmi-switcher > /dev/null 2>&1 && printf "\tCopy OK\n") || printf "\tCopy failure\n"
  23 fi
  24
  25 if [[ -e "/mnt/usb-update/update.zip" ]] && [[ -e "/mnt/usb-update/update.sig" ]]; then
  26   current_version=$(/home/pi/hdmi-switcher/hdmi-switcher version)
  27   printf "Updating software... "
  28   openssl dgst -sha256 -verify /home/pi/hdmi-switcher/public.pem -signature /mnt/usb-update/update.sig /mnt/usb-update/update.zip > /dev/null 2>&1
  29   if [[ $? = 0 ]]; then
  30     (unzip -o /mnt/usb-update/update.zip -d /home/pi > /dev/null 2>&1 && printf "\tOK\n") || printf "\tExtract failure\n"
  31     chmod +x /home/pi/hdmi-switcher/start.sh
  32     chmod +x /home/pi/hdmi-switcher/update.sh
  33     chmod +x /home/pi/hdmi-switcher/hdmi-switcher
  34     new_version=$(/home/pi/hdmi-switcher/hdmi-switcher version)
  35     if [[ "$current_version" != "$new_version" ]]; then
  36       printf "Restart required...\n"
  37       reboot
  38     fi
  39   else
  40     printf "\tSignature failure\n"
  41   fi
  42 fi
  43
  44 umount /dev/sda1 > /dev/null 2>&1