Watch number of instances of a process and restart it if greater than x

processcontrol.sh

#!/bin/bash
initscript="/etc/init.d/myprocess"
mail=$(which mail)
destinatario="[email protected]"
oggetto='Mail subject'
data=$(date)
limite=190 #must be an integer
process="" #if the process to restart differ from the name of the initscript, then set it here

#if $process isn't set than we set with the same name of the initscript
#+ e.g.: /etc/init.d/apache2 -> process will be "apache2"
[[ $process ]] || process=`basename $initscript`

if [ `ps -e -o comm= | grep $process | uniq -c | sed 's/[^0-9]//g'` -gt $limite ]; then
	logger [process control] restarting `basename $initscript` due to $process processes saturation
	${initscript} restart
	pkill imapd
	echo "Come da oggetto... Sto lavorando per voi. ${data}" | ${mail} -s "${oggetto}" ${destinatario}
fi