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#!/bin/rc
# usb/probe [-h] - list all usb devices, including hubs
rfork e
test -e /dev/usb || bind -a '#u' /dev || {
        echo no '#u/usb' >[1=2]
        exit nousb
}

filter = cat
if (~ $1 -h)
        filter = (grep -v ' (root)?hub ')

awk 'BEGIN      { ep = "" }
$1 ~ /ep[0-9]+\.0/ && $2 == "enabled" && $NF ~ /busy|idle/ {
        ep=$1
        next
}
{
        if(ep != ""){
                printf "%s %s\n", ep, $0
                ep = ""
        }
}
' /dev/usb/ctl | $filter

exit ''