DESCRIPTION

     The usbd utility handles USB device attachment and detachment.  It does
     two things.  Through opening the /dev/usb0, /dev/usb1, etc. devices, it
     enables the kernel to handle change requests from attached hubs.  This
     functionality will be removed when the kernel has kernel threads.  The
     (multiple) -f device command line options specify which controllers it
     should handle.  Normally this option is not needed.

     If the ``usb'', ``ohci'' and ``uhci'' modules are not loaded, usbd will
     load them automatically.

     The second part is the handling of the attachment and detachment of USB
     devices.  The device /dev/usb is opened and events are read from it.
     Whenever a device is attached or detached the list of actions read from
     /etc/usbd.conf is searched for a matching entry.  If found, the corre-
     sponding action is executed.

     The command line options are as follows:

     -c filename
             Name of configuration file.  The default is /etc/usbd.conf.

     -d      Enable debugging to the standard output, and do not disassociate
             from the controlling terminal.

     -e      Do one device tree exploration, no event queue handling and then
             exit.

     -f device
             Specify the pathname of a USB controller device file.  The flag
             may be repeated to watch more than one USB controller.  The
             default is /dev/usb0 through /dev/usb3.  Do not specify the
             device /dev/usb here.  It is used for events only.

     -n      Do not handle the event queue on /dev/usb.

     -t timeout
             Set the timeout interval (in seconds) before an exploration hap-
             pens without being triggered by a connect or disconnect.  A time-
             out of 0 means that there is no timeout.  The default is 30.

     -v      Be verbose.  Repeating the flag makes usbd more verbose.

FILES

     /etc/usbd.conf
     /dev/usb
     /dev/usb0
     /dev/usb1
     etc.

SEE ALSO