The update_drv command is used to inform the system about attribute changes to an installed device driver. By default, the system rereads the driver.conf(4) file and reloads the driver binary module.

The update_drv command has the following option:

-f

Force the system to reread the driver.conf file even if the driver module cannot be unloaded.

The following exit values are returned:

0

Successful completion.

>0

An error occurred.

See attributes(5) for descriptions of the following attributes:

add_drv(1M), modunload(1M), driver.conf(4), attributes(5)

driver.conf files can contain global properties shared by all driver instances. A forced update of the driver.conf file might change such global properties on the fly, which could have bad effects on attached instances. As a precautionary measure, instances that fail to detach continue to reference old driver global properties while newly attached instances reference new driver global properties.