{stdenv, hal, config}:

{
  name = "hal";
  
  users = [
    { name = "haldaemon";
      uid = (import ../system/ids.nix).uids.haldaemon;
      description = "HAL daemon user";
    }
  ];

  groups = [
    { name = "haldaemon";
      gid = (import ../system/ids.nix).gids.haldaemon;
    }
  ];

  extraPath = [hal];
  
  job = ''
    description "HAL daemon"

    # !!! TODO: make sure that HAL starts after acpid,
    # otherwise hald-addon-acpi will grab /proc/acpi/event.
    start on ${if config.powerManagement.enable then "acpid" else "dbus"}
    stop on shutdown

    start script

        # !!! quick hack: wait until dbus has started
        sleep 3

        mkdir -m 0755 -p /var/cache/hald

    end script

    respawn ${hal}/sbin/hald --daemon=no
  '';
  
}