HelenOS sources

usbdiag_connect    93 uspace/app/tmon/tf.c 	async_sess_t *sess = usbdiag_connect(fun);
usbdiag_connect    64 uspace/lib/drv/include/usbdiag_iface.h async_sess_t *usbdiag_connect(devman_handle_t);
HelenOS homepage, sources at GitHub