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LEARN ABOUT NETBSD

drvctl

DRVCTL(8)						    BSD System Manager's Manual 						 DRVCTL(8)

NAME

     drvctl -- tool to rescan busses and detach devices on user request

SYNOPSIS

     drvctl -r [-a attribute] busdevice [locator ...]
     drvctl -d device
     drvctl [-nt] -l [device]
     drvctl [-n] -p device [property ...]
     drvctl -Q device
     drvctl -R device
     drvctl -S device

DESCRIPTION

     The drvctl program works with the drvctl(4) pseudo-driver, and allows to rescan busses and to detach drivers from devices.

     The following options are available:

     -a      Give the interface attribute where children are to be attached to (and which defines the interpretation of the locator information).
	     This will only be needed in rare cases where the bus has multiple attributes.  If there are multiple attributes, and one is not spec-
	     ified, drvctl will return an Invalid argument.  In such cases, the -p option can be used to determine the available interface
	     attributes.

     -d      Detach the device driver from the device given by the device argument.

     -l      List the children of the device specified by the device argument.	If device is not specified, list roots of the device tree instead.
	     Output comes in two columns.  The first column is device, or ``root'' if device is not specified.	The second column is the child.

     -n      Suppress first column in -l output.  Suppress non-XML headers in -p output.

     -p      Get properties for the device specified by the device argument.  If property is specified, the value of that property is printed,
	     otherwise the properties are displayed as an XML property list.

     -Q      Resume the ancestors of device, device itself, and all of its descendants.

     -R      Resume both the ancestors of device and device itself.

     -r      Rescan the bus given by the busdevice argument.  The scan range can be restricted by an optional locator list.

     -S      Suspend both the descendants of device and device itself.

     -t      Print a tree of devices in -l output.

FILES

     /dev/drvctl

SEE ALSO

     proplib(3), autoconf(9)

BUGS

     Currently, there is no good way to get information about locator lengths and default values (which is present at kernel configuration time)
     out of a running kernel.  Thus the locator handling is less intelligent than it could be.

BSD
								 January 16, 2012							       BSD

Shell Programming and Scripting