#! /bin/sh

me=`basename $0`
dir=`dirname $0`
LOGGER="logger -i -t '$me'"

# Always redirect stderr somewhere, otherwise the shell script will die
# when it tries to do I/O related stuff on closed file descriptor.
# Our default is to throw it down the bit-bucket.
#exec 2> /dev/console
## If you wish to trace this script:
#exec 2> "/tmp/${me}_$XBUS_NAME" 1>&2

# Our directory in the beginning, so we can use local lab setup
PATH="$dir:/usr/sbin:/sbin:/usr/bin:/bin"

set -e

[ -r /etc/dahdi/init.conf ] && . /etc/dahdi/init.conf

# For lab testing
liveconf="$dir/liveconf/dahdi"

if [ -d "$liveconf" ]; then
	dahdi_conf="$liveconf"
else
	dahdi_conf="/etc/dahdi"
fi

export XPPORDER_CONF="$dahdi_conf/xpp_order"
if [ ! -r "$XPPORDER_CONF" ]; then
	(
		echo "Skip($ACTION): No '$XPPORDER_CONF'"
		echo "Removing uneeded startup semaphore"
		astribank_is_starting -v -r 2>&1
	) 2>&1 | $LOGGER
	exit 0
fi
export DAHDI_CFG_CMD="dahdi_cfg -c $dahdi_conf/system.conf"
export CALLED_FROM_ATRIBANK_HOOK=yes

clean_lines() {
	sed -e 's/#.*//' -e 'y/\t/ /' -e 's/^ *//' -e 's/ *$//' -e '$s/$/\n/' "$XPPORDER_CONF"
}

matched_devices() {
	ready=`grep -H READY /sys/bus/astribanks/devices/*/xbus_state | sed 's,/xbus_state.*,,'`
	for dev in $ready
	do
		label=`cat "$dev/label"`
		connector=`cat "$dev/connector"`
		xbus=`echo "$dev" | sed 's,.*/,,'`
		lineno=`clean_lines | egrep -n "^${label}$|^@${connector}$" | cut -d: -f1`
		if [ "$lineno" != "" ]; then
			#echo "$xbus: $XPPORDER_CONF:$lineno -- Match ${label} @${connector}" | $LOGGER
			printf "${xbus}\t${label}\n"
		else
			echo "${xbus}: ${label} @${connector} not found in $XPPORDER_CONF: Ignore($ACTION)" | $LOGGER
		fi
	done
}

NUM_WANTED=`clean_lines | sed '/^$/d' | wc -l`
NUM_GOOD=`matched_devices | wc -l`

start_dahdi() {
	script=/etc/init.d/dahdi
	if [ "$XPP_HOTPLUG_DAHDI" = yes ]; then
		echo "Starting $script."
		"$script" start | logger -i -t "$script"
		status=$?
		echo "Status($script): $status"
	else
		echo "$0: Skip($script): No XPP_HOTPLUG_DAHDI=yes in /etc/dahdi/init.conf"
		exit 0
	fi
	if [ -x "$dir/twinstar_hook" ]; then
		"$dir/twinstar_hook"
	fi
	# Finished astribanks
	echo "Removing semaphore"
	astribank_is_starting -v -r
}

case "$ACTION" in
add)
	;;
remove)
	;;
online)
	echo "$ACTION($XBUS_NAME): $NUM_GOOD/$NUM_WANTED from $XPPORDER_CONF" | $LOGGER
	if [ "$NUM_GOOD" -eq "$NUM_WANTED" ]; then
		echo "START-DAHDI: Total $NUM_GOOD online." | $LOGGER
		# Fork services
		start_dahdi < /dev/null 2>&1 | $LOGGER &
	fi
	;;
offline)
	echo "$ACTION($XBUS_NAME): $NUM_GOOD/$NUM_WANTED from $XPPORDER_CONF" | $LOGGER
	if [ "$NUM_GOOD" -eq 0 ]; then
		echo "All Astribanks offline" | $LOGGER
		if [ -x "$dir/twinstar_hook" ]; then
			"$dir/twinstar_hook"
		fi
	fi
	;;
*)
	echo "$0: Unknown ACTION='$ACTION'" | $LOGGER
	echo "$0: ARGS='$*'" | $LOGGER
	echo "$0: ENV:" | $LOGGER
	env | $LOGGER
	exit 1
esac