diff --git a/usr.sbin/usbdump/usbdump.8 b/usr.sbin/usbdump/usbdump.8 --- a/usr.sbin/usbdump/usbdump.8 +++ b/usr.sbin/usbdump/usbdump.8 @@ -100,14 +100,18 @@ .Ar file . This option also works with the -s and -v options. .It Fl f Ar filter -The filter argument consists of either one or two numbers separated by a dot. +The filter argument consists of either one or two numbers separated +by a dot. The first indicates the device unit number which should be traced. -The second number which is optional indicates the endpoint which should be traced. +The second number which is optional indicates the endpoint which should +be traced. To get all traffic for the control endpoint, two filters should be created, one for endpoint 0 and one for endpoint 128. -If 128 is added to the endpoint number that means IN direction, else OUT direction is implied. +If 128 is added to the endpoint number that means IN direction, else OUT +direction is implied. A device unit or endpoint value of -1 means ignore this field. -If no filters are specified, all packets are passed through using the default -1,-1 filter. +f no filters are specified, all packets are passed through using the +default -1,-1 filter. This option can be specified multiple times. .It Fl h This option displays a summary of the command line options. @@ -134,7 +138,6 @@ The default output format of .Nm is as follows: -.Pp .Bd -literal