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OpenSolaris 2009.06 - man page for hal (opensolaris section 5)

hal(5)			       Standards, Environments, and Macros			   hal(5)

NAME
       hal - overview of hardware abstraction layer

DESCRIPTION
       The Hardware Abstraction Layer (HAL) provides a view of the various hardware attached to a
       system. This view is updated dynamically as hardware configuration  changes  by	means  of
       hotplug	or  other  mechanisms.	HAL  represents a piece of hardware as a device object. A
       device object is identified by a unique identifer and carries a set  of	key/value  pairs,
       referred  to  as  device properties. Some properties are derived from the actual hardware,
       some are merged from device information files (.fdi files), and some are  related  to  the
       actual device configuration.

       HAL provides an easy-to-use API through D-Bus. D-Bus is an IPC framework that, among other
       features, provides a system-wide message-bus that  allows  applications	to  talk  to  one
       another.  Specifically,	D-Bus provides asynchronous notification such that HAL can notify
       other peers on the message-bus when devices are added and removed, as well as when proper-
       ties on a device are changing.

       In  the	Solaris  operating  system,  HAL is supported by a daemon, hald(1M), and a set of
       utilities that enable the adding and removing of devices and  the  modification	of  their
       properties.

SEE ALSO
       hald(1M), fdi(4)

       See the HAL pages, including the HAL specification, under http://freedesktop.org.

SunOS 5.11				   11 Sep 2006					   hal(5)


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