DRVCTL(8) BSD System Manager's Manual DRVCTL(8)NAMEdrvctl — tool to rescan busses and detach devices on user request
SYNOPSISdrvctl-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 informa‐
tion). This will only be needed in rare cases where the bus has
multiple attributes. If there are multiple attributes, and one
is not specified, 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 ALSOproplib(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