switchmap-daemon

#!/bin/bash

#
# Josh Malone's (jmalone@nrao.edu) daemon process to run SwitchMap
# and accept requests for manual refresh from the web interface.
#

PREFIX=/opt/services/switchmap-dev
LOG=${PREFIX}/web/error-log

# How often to update the web page - in minutes
OFTEN=60

# Sleep period, in seconds - don't change 
SLEEPVAL=10

# The progress message to include on the web page
PROGMSG='<span style="background: #dd1111;">&nbsp; Update in progress &nbsp;</span><br>'

# Figure out the last time the web page was updated
last=$(stat -c %Z ${PREFIX}/web/index.html)

# Figure out what time it is now
now=$(date +%s)

echo $$ > /var/run/switchmap.pid
trap 'rm -f /var/run/switchmap.pid; exit' 0
trap 'rm -f /var/run/switchmap.pid; exit' 3
trap 'rm -f /var/run/switchmap.pid; exit' 15

# Remove stale killfile
rm -f /tmp/kill-switchmap

##################### Main loop

while :
do
 elapsed=$(( (now - last) / 60 ))

 [ -f /tmp/update-switchmap ] && echo "$PROGMSG" > ${PREFIX}/web/status.html

 # Run the small jobs every 60 mins, regardless
 if [ $elapsed -gt 60 -o -f /tmp/update-switchmap ]; then
	# Re-initialize the logfile
	echo "Updating SwitchMap at $(date)" >$LOG
	${PREFIX}/GetArp.pl 2>>$LOG >>$LOG
 	${PREFIX}/ScanSwitch.pl 2>>$LOG >>$LOG
	now=$((now + 5))
	last=$now
	# echo " done"
 fi

 # See if we should update the web page, too
 if [ $elapsed -gt ${OFTEN:-60} -o -f /tmp/update-switchmap ]; then
 echo "$PROGMSG" > ${PREFIX}/web/status.html
	${PREFIX}/SwitchMap.pl 2>>$LOG >>$LOG
	now=$(date +%s)
	last=$now
	rm -f /tmp/update-switchmap
	echo -n '' > ${PREFIX}/web/status.html
 fi

 if [ -f /tmp/kill-switchmap ]; then
	rm -f /tmp/kill-switchmap
	exit
 fi
 sleep ${SLEEPVAL:=10}
 now=$(( now + SLEEPVAL ))

done