flashair-network

#!/usr/bin/env bash
# ---------------------------------------------------
#  Flashair SD Card wifi network detection
# 
# Revision history :
#   30/03/2017, V1.0 - Creation by N. Bernaerts
#   12/08/2017, V1.1 - Restrict disconnect condition
# ---------------------------------------------------

# load flashair environment variables
. /usr/local/sbin/flashair-common

# check if connected to flashair wifi network
FLASHAIR_INTERFACE=$(iwconfig | grep "ESSID" | grep "${FLASHAIR_NAME}_" | cut -d' ' -f1)

# check if flashair daemon is running
start-stop-daemon --status --name "${FLASHAIR_DAEMON_NAME}"
FLASHAIR_DAEMON_STATUS=$?

echo "flashair network - ${FLASHAIR_DAEMON_NAME} status ${FLASHAIR_DAEMON_STATUS}" >> /tmp/flash.log

# if connected to flashair wifi network and daemon not running
if [ "${FLASHAIR_INTERFACE}" != "" -a "${FLASHAIR_DAEMON_STATUS}" != "0" ]
then
	# create fifo
	rm -f "${FLASHAIR_FIFO}"
	mkfifo "${FLASHAIR_FIFO}"

	# call flashair connect command
	flashair-command --connect "${FLASHAIR_INTERFACE}"

	# start flashair daemon
	start-stop-daemon --start --background --exec "${FLASHAIR_DAEMON_PATH}"

# else, if not connected to flashair wifi network and daemon is running
elif [ "${FLASHAIR_INTERFACE}" = "" -a "${FLASHAIR_DAEMON_STATUS}" = "0" ]
then
	# get processes ID
	PID_DAEMON=$(pgrep "${FLASHAIR_DAEMON_NAME}")
	PID_INOTIFY=$(pgrep --parent ${PID_DAEMON} "inotifywait")

	# stop inotifywait child process
	[ "${PID_INOTIFY}" != "" ] && kill -9 ${PID_INOTIFY}

	# stop flashair daemon
	start-stop-daemon --stop --name "${FLASHAIR_DAEMON_NAME}"

	# call flashair disconnect command
	flashair-command --disconnect

	# delete fifo
	rm -f "${FLASHAIR_FIFO}"
fi