Added unix-pipe wrapper

pipe_unix.go

@@ -0,0 +1,53 @@
+//
+// Copyright 2014-2016 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 darwin freebsd
+
+package serial // import "go.bug.st/serial.v1"
+
+import "syscall"
+
+// pipe is a small wrapper around unix-pipe syscall functions
+type pipe struct {
+	rd int
+	wr int
+}
+
+func newPipe() (*pipe, error) {
+	fds := []int{0, 0}
+	if err := syscall.Pipe(fds); err != nil {
+		return nil, err
+	}
+	return &pipe{rd: fds[0], wr: fds[1]}, nil
+}
+
+func (p *pipe) ReadFD() int {
+	return p.rd
+}
+
+func (p *pipe) WriteFD() int {
+	return p.wr
+}
+
+func (p *pipe) Write(data []byte) (int, error) {
+	return syscall.Write(p.wr, data)
+}
+
+func (p *pipe) Read(data []byte) (int, error) {
+	return syscall.Read(p.rd, data)
+}
+
+func (p *pipe) Close() error {
+	err1 := syscall.Close(p.rd)
+	err2 := syscall.Close(p.wr)
+	if err1 != nil {
+		return err1
+	}
+	if err2 != nil {
+		return err2
+	}
+	return nil
+}