package main import ( "bufio" "fmt" "io" "os/exec" "strings" "sync" "time" "github.com/docker/docker/pkg/integration/checker" "github.com/go-check/check" ) const attachWait = 5 * time.Second func (s *DockerSuite) TestAttachMultipleAndRestart(c *check.C) { testRequires(c, DaemonIsLinux) endGroup := &sync.WaitGroup{} startGroup := &sync.WaitGroup{} endGroup.Add(3) startGroup.Add(3) err := waitForContainer("attacher", "-d", "busybox", "/bin/sh", "-c", "while true; do sleep 1; echo hello; done") c.Assert(err, check.IsNil) startDone := make(chan struct{}) endDone := make(chan struct{}) go func() { endGroup.Wait() close(endDone) }() go func() { startGroup.Wait() close(startDone) }() for i := 0; i < 3; i++ { go func() { cmd := exec.Command(dockerBinary, "attach", "attacher") defer func() { cmd.Wait() endGroup.Done() }() out, err := cmd.StdoutPipe() if err != nil { c.Fatal(err) } if err := cmd.Start(); err != nil { c.Fatal(err) } buf := make([]byte, 1024) if _, err := out.Read(buf); err != nil && err != io.EOF { c.Fatal(err) } startGroup.Done() if !strings.Contains(string(buf), "hello") { c.Fatalf("unexpected output %s expected hello\n", string(buf)) } }() } select { case <-startDone: case <-time.After(attachWait): c.Fatalf("Attaches did not initialize properly") } dockerCmd(c, "kill", "attacher") select { case <-endDone: case <-time.After(attachWait): c.Fatalf("Attaches did not finish properly") } } func (s *DockerSuite) TestAttachTTYWithoutStdin(c *check.C) { testRequires(c, DaemonIsLinux) out, _ := dockerCmd(c, "run", "-d", "-ti", "busybox") id := strings.TrimSpace(out) c.Assert(waitRun(id), check.IsNil) done := make(chan error) go func() { defer close(done) cmd := exec.Command(dockerBinary, "attach", id) if _, err := cmd.StdinPipe(); err != nil { done <- err return } expected := "cannot enable tty mode" if out, _, err := runCommandWithOutput(cmd); err == nil { done <- fmt.Errorf("attach should have failed") return } else if !strings.Contains(out, expected) { done <- fmt.Errorf("attach failed with error %q: expected %q", out, expected) return } }() select { case err := <-done: c.Assert(err, check.IsNil) case <-time.After(attachWait): c.Fatal("attach is running but should have failed") } } func (s *DockerSuite) TestAttachDisconnect(c *check.C) { testRequires(c, DaemonIsLinux) out, _ := dockerCmd(c, "run", "-di", "busybox", "/bin/cat") id := strings.TrimSpace(out) cmd := exec.Command(dockerBinary, "attach", id) stdin, err := cmd.StdinPipe() if err != nil { c.Fatal(err) } defer stdin.Close() stdout, err := cmd.StdoutPipe() c.Assert(err, check.IsNil) defer stdout.Close() c.Assert(cmd.Start(), check.IsNil) defer cmd.Process.Kill() _, err = stdin.Write([]byte("hello\n")) c.Assert(err, check.IsNil) out, err = bufio.NewReader(stdout).ReadString('\n') c.Assert(err, check.IsNil) c.Assert(strings.TrimSpace(out), check.Equals, "hello") c.Assert(stdin.Close(), check.IsNil) // Expect container to still be running after stdin is closed running := inspectField(c, id, "State.Running") c.Assert(running, check.Equals, "true") } func (s *DockerSuite) TestAttachPausedContainer(c *check.C) { testRequires(c, DaemonIsLinux) // Containers cannot be paused on Windows defer unpauseAllContainers() dockerCmd(c, "run", "-d", "--name=test", "busybox", "top") dockerCmd(c, "pause", "test") out, _, err := dockerCmdWithError("attach", "test") c.Assert(err, checker.NotNil, check.Commentf(out)) c.Assert(out, checker.Contains, "You cannot attach to a paused container, unpause it first") }