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Clarify the functionality of usbd a bit more.

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This commit is contained in:
Nick Hibma 1999-11-22 19:04:58 +00:00
parent 6e24b2a8e2
commit 6739e1ad25
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=53599
1 changed files with 24 additions and 3 deletions
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usr.sbin/usbd/usbd.8
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@ -42,15 +42,36 @@
.Nd supervise USB attach/detach
.Sh SYNOPSIS
.Nm
.Op Fl c Ar configfile
.Op Fl d
.Op Fl e
.Op Fl f Ar device
.Op Fl n
.Op Fl t Ar timeout
.Op Fl v
.Sh DESCRIPTION
.Nm
handles the USB device attachment and detachment.
handles the USB device attachment and detachment. It does two things.
Through opening the
.Pa /dev/usb0 ,
.Pa /dev/usb1 ,
etc. devices, it enables the kernel to do handle change requests from
attached hubs. This functionality will be removed when the kernel has
kernel threads. The (multiple)
.Fl f Ar device
command line options specify which controllers it should handle.
Normally this option is not needed.
.Pp
The options are as follows:
The second part is the handling of the attachment and detachment of USB
devices. The device
.Pa /dev/usb
is opened and events are read from it. Whenever a device is attached or
detached the list of actions read from
.Pa /etc/usbd.conf
are searched for a matching entry. If found, the corresponding action is
executed.
.Pp
The command line options are as follows:
.Bl -tag -width Ds
.It Fl c Ar filename
Name of configuration file. The default is
@ -59,7 +80,7 @@ Name of configuration file. The default is
Enable debugging to the standard output,
and do not disassociate from the controlling terminal.
.It Fl e
Do one device tree exploration and then exit.
Do one device tree exploration, no event queue handling and then exit.
.It Fl f Ar device
Specify the pathname of a USB controller device file.
The flag may be repeated to watch more than one USB controller.