open reader using shift+P+P from Kindle's pdf viewer using launchpad

lsof is used to find path of current opened pdf

launchpad/kpdf.ini

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+[Actions]
+P P = !/mnt/us/launchpad/kpdf.sh

launchpad/kpdf.sh

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+echo unlock > /proc/keypad
+echo unlock > /proc/fiveway
+cd /mnt/us/test/
+cat /dev/fb0 > screen.fb0 &
+pdf=`lsof | grep /mnt/us/documents | cut -c81- | sort -u`
+./reader.lua "$pdf"
+cat screen.fb0 > /dev/fb0
+echo 1 > /proc/eink_fb/update_display