NAME    [Toc]    [Back]

     usbd -- supervise USB attach/detach

SYNOPSIS    [Toc]    [Back]

     usbd [-c configfile] [-d] [-e] [-f device] [-n] [-t timeout] [-v]

DESCRIPTION    [Toc]    [Back]

     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 corresponding
 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 happens
 without being triggered by a connect or disconnect.  A timeout
 of 0 means that there is no timeout.  The default is 30.

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

FILES    [Toc]    [Back]

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

SEE ALSO    [Toc]    [Back]

     usb(4), usbd.conf(5)

HISTORY    [Toc]    [Back]

     The usbd utility appeared in NetBSD 1.4.

AUTHORS    [Toc]    [Back]

     The usbd driver was written by Lennart Augustsson <[email protected]>
     for the NetBSD project.  The event queue handling in usbd was added by
     Nick Hibma <[email protected]>.


FreeBSD 5.2.1			 July 12, 1998			 FreeBSD 5.2.1