Fix ResetInputBuffer and ResetOutputBuffer on Darwin

serial_darwin.go

@@ -29,3 +29,11 @@ func (port *unixPort) setSpecialBaudrate(speed uint32) error {
 	const kIOSSIOSPEED = 0x80045402
 	return unix.IoctlSetPointerInt(port.handle, kIOSSIOSPEED, int(speed))
 }
+
+func (port *unixPort) ResetInputBuffer() error {
+	return unix.IoctlSetPointerInt(port.handle, ioctlTcflsh, unix.TCIFLUSH)
+}
+
+func (port *unixPort) ResetOutputBuffer() error {
+	return unix.IoctlSetPointerInt(port.handle, ioctlTcflsh, unix.TCOFLUSH)
+}

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)
+}

serial_unix.go

@@ -117,14 +117,6 @@ func (port *unixPort) Write(p []byte) (n int, err error) {
 	return
 }
 
-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)
-}
-
 func (port *unixPort) SetMode(mode *Mode) error {
 	settings, err := port.getTermSettings()
 	if err != nil {