1 files changed, 111 insertions, 0 deletions
diff --git a/src/os/fifo_test.go b/src/os/fifo_test.go
new file mode 100644
index 0000000..2439192
--- /dev/null
+++ b/src/os/fifo_test.go
@@ -0,0 +1,111 @@
+// 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()
+	}
+}