checkservice: exclude user slice

# disable grep options to avoid non default behaviour

unset GREP_OPTIONS

# Systemd cgroup path

systemd_cgroup_base_path='/sys/fs/cgroup/systemd'

(( $UID != 0 )) && echo 'You need to be root' && exit 1

if [[ -t 1 ]]; then

	echo '   -R: reload services' >&2

	echo "   -n: don't call systemd daemon-reload" >&2

	echo "   -N: don't display status of restart/reload units" >&2

	echo "   -u: list service in users slice" >&2

	echo "   -v: verbose mode" >&2

	exit 1

}

while getopts 'hrRnNv' opt; do

while getopts 'hrRnNuv' opt; do

	case $opt in

		r) systemd_cmd='restart';;

		R) systemd_cmd='reload';;

		n) no_reload=1;;

		N) no_status=1;;

		l) list=true;;

		u) user_slice=true;;

		v) verbose=true;;

		*) usage;;

	esac

services=($(systemctl --no-legend --full -t service|grep running|sed -rn 's/^(.*\.service).*/\1/p'))

# beggar count

declare -a needy=()

declare -a needy=() pids=()

declare -i pid=0

for svc in "${services[@]}"; do

	pid=$(systemctl -p MainPID show "$svc"|sed -nr 's/^MainPID=(.*)/\1/p')

	deleted=$(grep '(deleted)' "/proc/$pid/maps"|sed -nr 's|^\S+ ..x. \S+ \S+ \S+ \s+||p'|sort|uniq)

	if ! (( $pid > 0 )); then

		echo "** Unable to get pid ($pid) of $svc" >&2

	unit_path=$(systemctl -p ControlGroup show "$svc"|cut -f 2 -d=)

	# check if unit is in system slice

	[[ "$unit_path" =~ /user\.slice/ && ! "$user_slice" == true ]] && continue

	pids=( $(< "$systemd_cgroup_base_path/$unit_path/tasks") )

	if (( "${#pids[*]}" == 0 )); then

		echo "** Unable to get pid of $svc" >&2

		continue

	fi

	deleted=''

	for pid in "${pids[@]}"; do

		deleted=$(grep '(deleted)' "/proc/$pid/maps"|sed -nr 's|^\S+ ..x. \S+ \S+ \S+ \s+||p'|sort|uniq)

		if [[ -n $deleted ]]; then

			needy+=("$svc")

			if [[ $verbose ]]; then

				echo "systemctl restart '$svc'"

			fi

			[[ $systemd_cmd ]] && { systemctl "$systemd_cmd" "$svc" & }

			break

		fi

	done

done

wait

# show units status