systemd-restart-dead.py

#!/usr/bin/python2

import dbus, os, subprocess

bus = dbus.SystemBus()
manager_proxy = bus.get_object('org.freedesktop.systemd1', '/org/freedesktop/systemd1')
manager = dbus.Interface(manager_proxy, 'org.freedesktop.systemd1.Manager')

restart = []

for unit in manager.ListUnits():
    name = unit[0]
    status = unit[3]
    path = unit[6]
    
    #is it supposed to be running and is it a service?
    if status == 'active' and path.endswith("service"):
        unit_proxy = bus.get_object('org.freedesktop.systemd1', path)
        unit_if = dbus.Interface(unit_proxy, 'org.freedesktop.systemd1.Unit')
        unit_props = dbus.Interface(unit_proxy, 'org.freedesktop.DBus.Properties')

        pid = unit_props.Get('org.freedesktop.systemd1.Service', 'ExecMainPID')
        type = unit_props.Get('org.freedesktop.systemd1.Service', 'Type')

        #don't restart oneshot scripts, make sure we have a PID, and see if it's not running
        if type == 'forking' and pid and not os.path.exists("/proc/{0}/".format(pid)):
            #we need to restart them all in one transaction to prevent dependency issues
            restart.append(name)

#just restart them with systemctl, dbus has given me enough of a headache for now
if restart:
    subprocess.call(["/bin/systemctl", "restart"] + restart)