udev.conf(5) — Linux manual page

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

NAME

       udev.conf, udev.conf.d - Configuration for device event managing
       daemon

SYNOPSIS

           /etc/udev/udev.conf
           /run/udev/udev.conf
           /usr/local/lib/udev/udev.conf
           /usr/lib/udev/udev.conf
           /etc/udev/udev.conf.d/*.conf
           /run/udev/udev.conf.d/*.conf
           /usr/local/lib/udev/udev.conf.d/*.conf
           /usr/lib/udev/udev.conf.d/*.conf

DESCRIPTION

       These files contain configuration options for systemd-udevd(8).
       The syntax of these files is very simple: a list of assignments,
       one per line. All empty lines or lines beginning with "#" are
       ignored.

       The following options can be set:

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

               Note
               This option is also honored by udevadm(8).
           Added in version 216.

       children_max=
           An integer. The maximum number of events executed in
           parallel. When unspecified or 0 is specified, the maximum is
           determined based on the system resources.

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

           Added in version 240.

       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.

           Added in version 240.

       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.

           Added in version 240.

       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.

           Added in version 240.

       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.

           Added in version 246.

       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)

COLOPHON

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       manager) project.  Information about the project can be found at
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have
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       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2024-06-14.  (At that
       time, the date of the most recent commit that was found in the
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       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

systemd 257~devel                                           UDEV.CONF(5)

Pages that refer to this page: systemd.directives(7), systemd.index(7), systemd.system-credentials(7), systemd-udevd.service(8), udevadm(8)

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