UDEVD(8)		 Linux Administrator's Manual		     UDEVD(8)



NAME
       udevd, udevdsend - udev event serializer daemon and udev event sender

SYNOPSIS
       udevsend hotplug-subsystem

       The environment must provide the following variables:

       ACTION add  or  remove  signifies the connection or disconnection of a
	      device.

       DEVPATH
	      The sysfs devpath of the device without the  mountpoint  but  a
	      leading slash.

       SEQNUM The  sequence  number  of the event provided by the kernel.  If
	      unset, the event bypasses the queue and will be executed	imme-
	      diately.

DESCRIPTION
       udevd allows the serialization of hotplug(8) events. The events gener-
       ated by the kernel may arrive in random order in userspace, that makes
       it neccessary to reorder them.
       udevd  takes  care of the kernel supplied sequence number and arranges
       the events for execution in the correct order. Missing sequences delay
       the execution of the following events until a timeout is reached.
       For  each  event a udev(8) instance is executed in the background. All
       further events for the same device are delayed until the execution  is
       finished.  This way there will never be more than one instance running
       for a single device at the same time.
       udevd receives the events from udevsend which is called by hotplug(8).
       If udevd isn't already running, udevsend will start it.

SEE ALSO
       udev(8), udevinfo(8), hotplug(8)

AUTHORS
       udevd  was  developed primarily by Kay Sievers ,
       with much help from others.



				February 2004			     UDEVD(8)

UNIX/Linux commands referenced on this page:

1. udev
2. udevsend
3. more
4. at
5. which