only echo to /proc/keypad for K3 and DXG

kpdf.sh

@@ -1,8 +1,10 @@
 #!/bin/sh
 export LC_ALL="en_US.UTF-8"
 
-echo unlock > /proc/keypad
+PROC_KEYPAD="/proc/keypad"
-echo unlock > /proc/fiveway
+PROC_FIVEWAY="/proc/fiveway"
+test -e $PROC_KEYPAD && echo unlock > $PROC_KEYPAD
+test -e $PROC_FIVEWAY && echo unlock > $PROC_FIVEWAY
 
 # we're always starting from our working directory
 cd /mnt/us/kindlepdfviewer/

reader.lua

@@ -136,6 +136,8 @@ Screen:setRotationMode(Screen.native_rotation_mode)
 input.closeAll()
 if util.isEmulated()==0 then
 	os.execute("killall -cont cvm")
-	-- send double menu key press events to trigger screen refresh
+	if Device:isKindle3() or (Device:getModel() == "KindleDXG") then
-	os.execute("echo 'send 139' > /proc/keypad;echo 'send 139' > /proc/keypad")
+		-- send double menu key press events to trigger screen refresh
+		os.execute("echo 'send 139' > /proc/keypad;echo 'send 139' > /proc/keypad")
+	end
 end