Fix ResetInputBuffer and ResetOutputBuffer on Darwin

serial_resetbuf_linux_bsd.go

@@ -0,0 +1,19 @@
+//
+// Copyright 2014-2021 Cristian Maglie. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+
+// +build linux freebsd openbsd
+
+package serial
+
+import "golang.org/x/sys/unix"
+
+func (port *unixPort) ResetInputBuffer() error {
+	return unix.IoctlSetInt(port.handle, ioctlTcflsh, unix.TCIFLUSH)
+}
+
+func (port *unixPort) ResetOutputBuffer() error {
+	return unix.IoctlSetInt(port.handle, ioctlTcflsh, unix.TCOFLUSH)
+}