/sources/plan9/sys/src/cmd/usb/usbd/
      5962 2012-11-14 dev.c
      1827 2010-10-22 mkdev
       437 2012-04-17 mkfile
     19310 2012-12-11 usbd.c
      3003 2014-02-06 usbd.h
       565 2012-10-02 usbdb