// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin dragonfly freebsd linux netbsd openbsd
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package os_test
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import (
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"bufio"
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"bytes"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"path/filepath"
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"runtime"
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"sync"
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"syscall"
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"testing"
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"time"
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)
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// Issue 24164.
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func TestFifoEOF(t *testing.T) {
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switch runtime.GOOS {
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case "android":
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t.Skip("skipping on Android; mkfifo syscall not available")
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case "openbsd":
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// On OpenBSD 6.2 this test just hangs for some reason.
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t.Skip("skipping on OpenBSD; issue 25877")
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}
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dir, err := ioutil.TempDir("", "TestFifoEOF")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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fifoName := filepath.Join(dir, "fifo")
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if err := syscall.Mkfifo(fifoName, 0600); err != nil {
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t.Fatal(err)
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}
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var wg sync.WaitGroup
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wg.Add(1)
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go func() {
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defer wg.Done()
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w, err := os.OpenFile(fifoName, os.O_WRONLY, 0)
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if err != nil {
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t.Error(err)
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return
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}
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defer func() {
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if err := w.Close(); err != nil {
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t.Errorf("error closing writer: %v", err)
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}
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}()
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for i := 0; i < 3; i++ {
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time.Sleep(10 * time.Millisecond)
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_, err := fmt.Fprintf(w, "line %d\n", i)
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if err != nil {
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t.Errorf("error writing to fifo: %v", err)
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return
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}
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}
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time.Sleep(10 * time.Millisecond)
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}()
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defer wg.Wait()
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r, err := os.Open(fifoName)
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if err != nil {
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t.Fatal(err)
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}
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done := make(chan bool)
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go func() {
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defer close(done)
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defer func() {
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if err := r.Close(); err != nil {
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t.Errorf("error closing reader: %v", err)
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}
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}()
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rbuf := bufio.NewReader(r)
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for {
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b, err := rbuf.ReadBytes('\n')
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if err == io.EOF {
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break
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}
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if err != nil {
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t.Error(err)
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return
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}
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t.Logf("%s\n", bytes.TrimSpace(b))
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}
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}()
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select {
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case <-done:
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// Test succeeded.
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case <-time.After(time.Second):
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t.Error("timed out waiting for read")
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// Close the reader to force the read to complete.
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r.Close()
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}
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}
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