Fix issue #48 (errno 0), #48

tarm · Aug 23, 2017 · de14b5c · de14b5c
1 parent e50d7d2
commit de14b5c
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/serial_linux.go b/serial_linux.go
@@ -143,13 +143,17 @@ func (p *Port) Write(b []byte) (n int, err error) {
 // or data received but not read
 func (p *Port) Flush() error {
 	const TCFLSH = 0x540B
-	_, _, err := syscall.Syscall(
+	_, _, errno := syscall.Syscall(
 		syscall.SYS_IOCTL,
 		uintptr(p.f.Fd()),
 		uintptr(TCFLSH),
 		uintptr(syscall.TCIOFLUSH),
 	)
-	return err
+
+	if errno == 0 {
+		return nil
+	}
+	return errno
 }
 
 func (p *Port) Close() (err error) {