if (i & TCL_WRITABLE) {
	    Tcl_AppendElement(interp, "writable");
	}
    } else if (strcmp(argv[1], "windowevent") == 0) {
	Tcl_DoOneEvent(TCL_WINDOW_EVENTS|TCL_DONT_WAIT);
    } else {
	Tcl_AppendResult(interp, "bad option \"", argv[1],
		"\": must be close, clear, counts, create, empty, fill, "
		"\": should be close, clear, counts, create, empty, fill, "
		"fillpartial, oneevent, wait, or windowevent", NULL);
	return TCL_ERROR;
    }
    return TCL_OK;
}

static void

	mask = TCL_READABLE;
    } else if (strcmp(argv[2], "writable") == 0){
	mask = TCL_WRITABLE;
    } else if (strcmp(argv[2], "both") == 0){
	mask = TCL_WRITABLE|TCL_READABLE;
    } else {
	Tcl_AppendResult(interp, "bad argument \"", argv[2],
		"\": must be readable, writable, or both", NULL);
		"\": should be readable, writable, or both", NULL);
	return TCL_ERROR;
    }
    if (Tcl_GetChannelHandle(channel,
	    (mask & TCL_READABLE) ? TCL_READABLE : TCL_WRITABLE,
	    (ClientData*) &data) != TCL_OK) {
	Tcl_AppendResult(interp, "couldn't get channel file", NULL);
	return TCL_ERROR;