restart_services.sh

#!/bin/bash

SERVBIN=${SERVBIN:-/usr/sbin/service}
success=0

function echo_rep {
	echo -n $(tput cuu1)
	echo -n $(tput ed)
	echo "$1"
}

function echo_status {
	service="$1"
	status="$2"

	prelude="  * $service: "

	case "$status" in
		dead)
			echo_rep "$prelude$(tput setaf 1)dead$(tput sgr0)"
			;;
		restarting)
			echo_rep "$prelude$(tput setaf 6)restarting$(tput sgr0)"
			;;
		started)
			echo_rep "$prelude$(tput setaf 2)started$(tput sgr0)"
			;;
		failed)
			echo_rep "$prelude$(tput setaf 1)$(tput rev)failed$(tput sgr0)"
			;;
	esac
}

function silent {
	$@ &> /dev/null
	return $?
}

function ensure_started {
	service="$1"
	echo

	if silent $SERVBIN $service status
	then
		echo_status $service started
	else
		echo_status $service dead
		echo_status $service restarting

		if silent $SERVBIN $service restart
		then
			echo_status $service started
		else
			echo_status $service failed
			success=1
		fi
	fi
}

if [ $# -eq 0 ]
then
	echo "$(tput setaf 5)$0 -- $(tput bold)Service status checking script$(tput sgr0)"
	echo "$(tput rev)usage:$(tput sgr0) supply a list of services as arguments and this" \
		"script will check that those services are still running."\
		"If they are not, an attempt to start them will be done."
	echo "It uses the $(tput setaf 6)service$(tput sgr0) utility."\
		"By default it goes to /usr/sbin/service, but you can"\
		"set its value using the $(tput setaf 6)SERVBIN$(tput sgr0)"\
		"environment variable."
	exit 1
fi

echo "$(tput setaf 5)[moshi moshi]$(tput bold) Checking services...$(tput sgr0)"
echo

for service in "$@"
do
	ensure_started $service
done

echo
if [ $success -eq 0 ]
then
	echo "$(tput setaf 2)$(tput bold)All good!$(tput sgr0)"
else
	echo "$(tput setaf 1)$(tput bold)Failure! Good luck.$(tput sgr0)"
fi

exit $success