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Full Discussion: Linux Kernel Modules
Special Forums Hardware Linux Kernel Modules Post 302890063 by hergp on Tuesday 25th of February 2014 02:51:30 AM
Old 02-25-2014
udev manages device nodes. The kernel sends events to the udev daemon whenever a device is discovered or removed. Then udev uses a collection of rules to create or remove device nodes in the filesystem or perform other actions.

udev does not load or unload kernel drivers.
 

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upstart-udev-bridge(8)					      System Manager's Manual					    upstart-udev-bridge(8)

NAME
upstart-udev-bridge - Bridge between Upstart and udev SYNOPSIS
upstart-udev-bridge [OPTIONS]... DESCRIPTION
upstart-udev-bridge receives information about kernel uevents that udev(8) has completed and creates init(8) events for them. It emits events which match the pattern "S-device-A" where 'S' is the udev subsystem and 'A' is the udev action. See udev(7) and for fur- ther details. Assuming /sys is mounted, possible values for subsystem for your system are viewable via /sys/class/. EXAMPLES
net-device-added Event emitted when a network device is added. net-device-removed Event emitted when a network device is removed. graphics-card-added Event emitted when a graphics device is available to the system. NOTES
This is a temporary tool until init(8) itself gains the functionality to read them directly; you should not rely on its behaviour. AUTHOR
Written by Scott James Remnant <scott@netsplit.com> BUGS
Report bugs at <https://launchpad.net/ubuntu/+source/upstart/+bugs> COPYRIGHT
Copyright (C) 2009,2010,2011 Canonical Ltd. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
init(5) init(8) udev(7) upstart 2011-03-08 upstart-udev-bridge(8)
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