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