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

NAME
     usbd -- supervise USB attach/detach

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

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 de-
	     fault 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
     usb(4), usbd.conf(5)

HISTORY
     The usbd utility appeared in NetBSD 1.4.

AUTHORS
     The usbd driver was written by Lennart Augustsson <augustss@carlstedt.se>
     for the NetBSD project.  The event	queue handling in usbd was added by
     Nick Hibma	<n_hibma@FreeBSD.org>.

BSD				 July 12, 1998				   BSD

NAME | SYNOPSIS | DESCRIPTION | FILES | SEE ALSO | HISTORY | AUTHORS

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