# Pastebin N9YISpKV
#!/bin/sh
if [ "$(id -u)" -ne 0 ]; then
    echo "session-tool needs to be invoked as root" >&2
    exit 1
fi
if [ -z "$(command -v busctl)" ]; then
    echo "session-tool requires busctl" >&2
    exit 1
fi
if [ $# -eq 0 ]; then
	echo "usag: session-tool [-u user] [--] <CMD>"
	exit 1
fi
pid=$PPID
user=root
while [ $# -gt 0 ]; do
	case "$1" in
		--)
			shift
			break
			;;
		-u)
			user="$2"
			shift 2
			;;
		-*)
			echo "session-tool: unsupported argument $1" >&2
			exit 1
			;;
		*)
			break
			;;
	esac
done
unit_name="service-tool-$(cat /proc/sys/kernel/random/uuid).service"
exec busctl \
	--allow-interactive-authorization=no \
	--quiet \
	--system \
	-- \
	call \
	 org.freedesktop.systemd1 \
	/org/freedesktop/systemd1 \
	 org.freedesktop.systemd1.Manager \
	StartTransientUnit "ssa(sv)a(sa(sv))" \
	"$unit_name" fail 3 \
		Description s "service-tool running $* as $user" \
		Type s oneshot \
		ExecStart "a(sasb)" 1 \
			/bin/sh 3 /bin/sh -c "exec runuser -l - $user -c \"$*\" </dev/null >/proc/$pid/fd/1 2>/proc/$pid/fd/2" false \
	0