man 5 udev.conf

UDEV.CONF(5)                       udev.conf                      UDEV.CONF(5)

NAME
       udev.conf - Configuration for device event managing daemon

SYNOPSIS
       /etc/udev/udev.conf

DESCRIPTION
       systemd-udevd(8) expects its main configuration file at
       /etc/udev/udev.conf. It consists of a set of variables allowing the
       user to override default udev values. All empty lines or lines
       beginning with '#' are ignored. The following variables can be set:

       udev_log=
           The log level. Valid values are the numerical syslog priorities or
           their textual representations: err, info and debug.

       children_max=
           An integer. The maximum number of events executed in parallel.

           This is the same as the --children-max= option.

       exec_delay=
           An integer. Delay the execution of each RUN{program} parameter by
           the given number of seconds. This option might be useful when
           debugging system crashes during coldplug caused by loading
           non-working kernel modules.

           This is the same as the --exec-delay= option.

       event_timeout=
           An integer. The number of seconds to wait for events to finish.
           After this time, the event will be terminated. The default is 180
           seconds.

           This is the same as the --event-timeout= option.

       resolve_names=
           Specifies when systemd-udevd should resolve names of users and
           groups. When set to early (the default), names will be resolved
           when the rules are parsed. When set to late, names will be resolved
           for every event. When set to never, names will never be resolved
           and all devices will be owned by root.

           This is the same as the --resolve-names= option.

       timeout_signal=
           Specifies a signal that systemd-udevd will send on worker timeouts.
           Note that both workers and spawned processes will be killed using
           this signal. Defaults to SIGKILL.

       In addition, systemd-udevd can be configured by command line options
       and the kernel command line (see systemd-udevd(8)).

SEE ALSO
       systemd-udevd(8), udev(7), udevadm(8)

systemd 252                                                       UDEV.CONF(5)