#!/bin/sh

which xprop &>/dev/null || exit 1
sleep 2

TRIAL=0
FOUND=0
PROGNAME=$0
while true ; do
	if test $TRIAL -ge 6 ; then
		echo "$PROGNAME: not lauching daemon_wallpapoz"
		exit 1
	fi

	COMMAND="xprop -root _NET_NUMBER_OF_DESKTOPS 2>/dev/null"
	RESULT=$(eval "$COMMAND")
	RESULT=${RESULT:36}
	if ( (test -z "$RESULT" ) || ! (echo "$RESULT" | grep -q "^[0-9]" ) ) ; then
		# xprop failed
		echo "daemon_wallpapoz: $COMMAND failed at startup, retrying after 3 seconds..."
		TRIAL=$((TRIAL+1))
		sleep 3
		continue
	fi

	COMMAND="xprop -root _NET_DESKTOP_GEOMETRY 2>/dev/null"
	RESULT=$(eval "$COMMAND")
	RESULT=${RESULT:34}
	WIDTH=$(echo $RESULT | sed -e 's|,.*$||')
	HEIGHT=$(echo $RESULT | sed -e 's|^.*,||' | sed -e 's|^[ \t][ \t]*||')
	if ( (test -z "$WIDTH" ) || ! (echo "$WIDTH" | grep -q "^[0-9]" ) ) ; then
		# xprop failed
		echo "daemon_wallpapoz: $COMMAND failed at startup, retrying after 3 seconds..."
		TRIAL=$((TRIAL+1))
		sleep 3
		continue
	fi
	if ( (test -z "$HEIGHT" ) || ! (echo "$HEIGHT" | grep -q "^[0-9]" ) ) ; then
		# xprop failed
		echo "daemon_wallpapoz: $COMMAND failed at startup, retrying after 3 seconds..."
		TRIAL=$((TRIAL+1))
		sleep 3
		continue
	fi

	COMMAND="xprop -root _NET_DESKTOP_VIEWPORT 2>/dev/null"
	RESULT=$(eval "$COMMAND")
	RESULT=${RESULT:34}
	WIDTH=$(echo $RESULT | sed -e 's|,.*$||')
	HEIGHT=$(echo $RESULT | sed -e 's|^.*,||' | sed -e 's|^[ \t][ \t]*||')
	if ( (test -z "$WIDTH" ) || ! (echo "$WIDTH" | grep -q "^[0-9]" ) ) ; then
		# xprop failed
		echo "daemon_wallpapoz: $COMMAND failed at startup, retrying after 3 seconds..."
		TRIAL=$((TRIAL+1))
		sleep 3
		continue
	fi
	if ( (test -z "$HEIGHT" ) || ! (echo "$HEIGHT" | grep -q "^[0-9]" ) ) ; then
		# xprop failed
		echo "daemon_wallpapoz: $COMMAND failed at startup, retrying after 3 seconds..."
		TRIAL=$((TRIAL+1))
		sleep 3
		continue
	fi

	COMMAND="xprop -root _NET_CURRENT_DESKTOP 2>/dev/null"
	RESULT=$(eval "$COMMAND")
	RESULT=${RESULT:33}
	if ( (test -z "$RESULT" ) || ! (echo "$RESULT" | grep -q "^[0-9]" ) ) ; then
		# xprop failed
		echo "daemon_wallpapoz: $COMMAND failed at startup, retrying after 3 seconds..."
		TRIAL=$((TRIAL+1))
		sleep 3
		continue
	fi

	# succeeded
	break
done

exec /usr/libexec/daemon_wallpapoz "$@"
exit 1