#!/bin/sh /etc/rc.common
# Init script for aprx
# This script starts the APRX daemon and the display output script.

START=99

# variable definitions
PROG="aprx"
APRX_BIN="/usr/sbin/$PROG"
APRX_LOG_DIR="/var/log/aprx"
APRX_CNF="/tmp/aprx.conf"
APRX_CNF_DEFAULT="/etc/aprx.conf"
APRX_CNF_DIR="/home/aprx/config/"
APRX_CNF_SELECT="config.use"
APRX_LOG_DISPLAY="/home/bin/display_aprx_log_loop"
DISPLAY="/dev/Display"

system_config() {
	local cfg="$1"
	config_get hostname "$cfg" hostname
}

start() {
	# check if the APRX program exists at all.
	[ -x "$APRX_BIN" ] || return 1

	# create the tmp config directory if it does not exist yet
	[ -d "$APRX_LOG_DIR" ] || mkdir -p $APRX_LOG_DIR

	# read out the to be used configuration from the APRX_CNF_SELECT file
	# and copy it to the tmp config that is used at runtime
	[ -f "$APRX_CNF_DIR$APRX_CNF_SELECT" ] && cp -f $APRX_CNF_DIR$(awk '/^aprx./ { print }' $APRX_CNF_DIR$APRX_CNF_SELECT) $APRX_CNF

	# if there is still no config file use the default one from APRX_CNF_DEFAULT
	[ -e "$APRX_CNF" ] || cp -f $APRX_CNF_DEFAULT $APRX_CNF
	sleep 1

	#----------- START the APRX daemon --------------
	# start the APRX daemon APRX_BIN with our config file APRX_CNF.
	$APRX_BIN -f $APRX_CNF &
	sleep 1
	# check if the APRX program was started successfully by checking the existence of PID file.
	if [ -f /var/run/aprx.pid ] ; then
		# APRX start successful. Print out info to display.
		echo "$PROG started successfully" > $DISPLAY
		# read out the APRX config file APRX_CNF and print out the lines that are starting with #Display to the display.
		awk '/^#Display:/ { $1=""; print }' $APRX_CNF > $DISPLAY
		# do the same again but write to log file.
		logger -t "$PROG" "..started successfully"
		awk '/^#Display:/ { $1=""; print }' $APRX_CNF
		sleep 1
		# start the APRX_LOG_DISPLAY script. This routine compares the the log file
		# further explanation can be found in the script itselfe. 
	       $APRX_LOG_DISPLAY&
	else	
		# APRX start failed. Print out info to display.
		echo "$PROG startup FAILED" > $DISPLAY
		# do the same again but write to log file.
		logger -t "$PROG" "..startup FAILED"
	fi
	}

stop() {
	# stops all processes of APRX.
	killall $PROG
	# check if PID file still exists.
	if [ -f /var/run/aprx.pid ] ; then
		# PID file still exists. stop was not successful. Print out this information to display.
		echo "$PROG still running" > $DISPLAY
		# do the same again but write to log file.
		logger -t "$PROG" "..still running"
	else
		# PID file gone. stop was successful. Print out this information to display.
		echo "$PROG stopped" > $DISPLAY
		# do the same again but write to log file.
		logger -t "$PROG" "..stopped"
	fi

}

restart() {
	stop
	start
}