mra-guard

#!/bin/bash

#[ -d .offlineimap/log ] || mkdir .offlineimap; touch .offlineimap/log

name=$(basename "$0")
lock=/tmp/${name}_${USER}.pid

if [ -f $lock ] && kill -0 $(cat $lock) &>/dev/null
then
	exit 1
else
	echo $$ > $lock
fi

trap '' SIGHUP
trap "{ rm -f $lock; exit 1; }" SIGINT SIGTERM EXIT

while true
do
	# Is offlineimap ok?
	sed '/^$/!h;$!d;g' ~/.offlineimap/log |grep -q -E "^-+$"

	if [ "$?" != "0" ]
	then
		kill $(cat .offlineimap/pid) &>/dev/null
	fi

	# Is offlineimap dead?
	kill -0 $(cat .offlineimap/pid) &>/dev/null

	if [ "$?" != "0" ]
	then
		cat <<- EOF >> ~/.offlineimap/log

		--------------------------------
		offlineimap started: $(date +'%Y-%m-%d %H:%M')
		--------------------------------

		EOF

		nohup offlineimap >> ~/.offlineimap/log 2>&1 &
	fi

	sleep 120
done

exit 0