Synology HP Printer Firmware Script

# WARNING: I have very basic/limited unix/linux
# scripting abilities.

# BEGIN HP 1020 PRINTER SCRIPT
echo "`date` ----------------BEGIN PRINTER SCRIPT `date` --------------" >> /var/log/hp
if [ "$ACTION" = "add" ]
then
     # OK So the action is what we expected
     echo "`date` : Action is the expected result: '$ACTION'" >> /var/log/hp

     # Lets validate the product ID
     HPPRODUCTID="3f0/2b17/100"
     #HPPRODUCTID=03f0/4117/100

     echo "`date` : HP Product ID set to '$HPPRODUCTID'" >> /var/log/hp

     if [ "$PRODUCT" = "$HPPRODUCTID" ]
     then
          # OK So the product ID is what we expected
          echo "`date` : Product is the expected result: '$PRODUCT'" >> /var/log/hp

          # OK So the action is what we expected
          echo "`date` : Action is the expected result: '$ACTION'" >> /var/log/hp

          # Adding a pause to make sure its fully initialized before we try to upload firmware
          printersleep=5
          echo "`date` : Sleeping $printersleep seconds before preparing to upload firmware to printer..." >> /var/log/hp
          sleep $printersleep
          echo "`date` : Finished sleeping $printersleep seconds; Continuing with firmware upload." >> /var/log/hp

          # Set path to HP firmware file
          HPFIRMWARE="/usr/syno/hotplug/firmware/sihp1020.dl"

          echo "`date` : Firmware path set to: '$HPFIRMWARE'" >> /var/log/hp

          # Lets make sure the firmware file not only actually
          # exists in the path above, but has a size greater than zero.
          # Alternatively we could use
          #     -e = simply check if the file exists
          #     -a = same as -e but has been deprecated and use discouraged
          #     -f = make sure its a regular file, not a directory or device file
          #     -r = make sure file is readable
          if [ -s "$HPFIRMWARE" ]
          then
                # OK So the Firmware is present!
                echo "`date` : Firmware file '$HPFIRMWARE' is present" >> /var/log/hp

                # At this point all should be fine!
                echo "`date` : Sending firmware to printer..." >> /var/log/hp
                cat $HPFIRMWARE > /dev/usb/lp0
                echo "`date` : Finished sending firmeware to printer!" >> /var/log/hp
                #echo "`date` ----------------END PRINTER SCRIPT `date` --------------" >> /var/log/hp
          else
                # Whoops - the firmware is missing it seems!
                echo "`date` : ERROR: Missing Firmware File: $HPFIRMWARE" >> /var/log/hp
                echo "`date` : Download firmware: http://oleg.wl500g.info/hplj/sihp1020.dl/ " >> /var/log/hp
                #echo "`date` ----------------END PRINTER SCRIPT `date` --------------" >> /var/log/hp
          fi
     else
          # The device/product ID is different than we anticipated
          # Check the log to see what it is
          echo "`date` : WARN: Product is not '$HPPRODUCTID', its '$PRODUCT'" >> /var/log/hp
     fi
else
     # The action is different than we anticipated
     # Check the log to see what it is
     echo "`date` : WARN: Action is not add, its '$ACTION'" >> /var/log/hp
fi
echo "`date` ----------------END PRINTER SCRIPT `date` --------------" >> /var/log/hp