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//go:build !windows
// +build !windows
package main
import (
"bufio"
"io"
"os/exec"
"strings"
"testing"
"time"
"github.com/creack/pty"
"gotest.tools/v3/assert"
)
// #9860 Make sure attach ends when container ends (with no errors)
func (s *DockerCLIAttachSuite) TestAttachClosedOnContainerStop(c *testing.T) {
testRequires(c, testEnv.IsLocalDaemon)
out, _ := dockerCmd(c, "run", "-dti", "busybox", "/bin/sh", "-c", `trap 'exit 0' SIGTERM; while true; do sleep 1; done`)
id := strings.TrimSpace(out)
assert.NilError(c, waitRun(id))
pty, tty, err := pty.Open()
assert.NilError(c, err)
attachCmd := exec.Command(dockerBinary, "attach", id)
attachCmd.Stdin = tty
attachCmd.Stdout = tty
attachCmd.Stderr = tty
err = attachCmd.Start()
assert.NilError(c, err)
errChan := make(chan error, 1)
go func() {
time.Sleep(300 * time.Millisecond)
defer close(errChan)
// Container is waiting for us to signal it to stop
dockerCmd(c, "stop", id)
// And wait for the attach command to end
errChan <- attachCmd.Wait()
}()
// Wait for the docker to end (should be done by the
// stop command in the go routine)
dockerCmd(c, "wait", id)
select {
case err := <-errChan:
tty.Close()
out, _ := io.ReadAll(pty)
assert.Assert(c, err == nil, "out: %v", string(out))
case <-time.After(attachWait):
c.Fatal("timed out without attach returning")
}
}
func (s *DockerCLIAttachSuite) TestAttachAfterDetach(c *testing.T) {
name := "detachtest"
cpty, tty, err := pty.Open()
assert.NilError(c, err, "Could not open pty: %v", err)
cmd := exec.Command(dockerBinary, "run", "-ti", "--name", name, "busybox")
cmd.Stdin = tty
cmd.Stdout = tty
cmd.Stderr = tty
cmdExit := make(chan error, 1)
go func() {
cmdExit <- cmd.Run()
close(cmdExit)
}()
assert.Assert(c, waitRun(name) == nil)
cpty.Write([]byte{16})
time.Sleep(100 * time.Millisecond)
cpty.Write([]byte{17})
select {
case <-cmdExit:
case <-time.After(5 * time.Second):
c.Fatal("timeout while detaching")
}
cpty, tty, err = pty.Open()
assert.NilError(c, err, "Could not open pty: %v", err)
cmd = exec.Command(dockerBinary, "attach", name)
cmd.Stdin = tty
cmd.Stdout = tty
cmd.Stderr = tty
err = cmd.Start()
assert.NilError(c, err)
defer cmd.Process.Kill()
bytes := make([]byte, 10)
var nBytes int
readErr := make(chan error, 1)
go func() {
time.Sleep(500 * time.Millisecond)
cpty.Write([]byte("\n"))
time.Sleep(500 * time.Millisecond)
nBytes, err = cpty.Read(bytes)
cpty.Close()
readErr <- err
}()
select {
case err := <-readErr:
assert.NilError(c, err)
case <-time.After(2 * time.Second):
c.Fatal("timeout waiting for attach read")
}
assert.Assert(c, strings.Contains(string(bytes[:nBytes]), "/ #"))
}
// TestAttachDetach checks that attach in tty mode can be detached using the long container ID
func (s *DockerCLIAttachSuite) TestAttachDetach(c *testing.T) {
out, _ := dockerCmd(c, "run", "-itd", "busybox", "cat")
id := strings.TrimSpace(out)
assert.NilError(c, waitRun(id))
cpty, tty, err := pty.Open()
assert.NilError(c, err)
defer cpty.Close()
cmd := exec.Command(dockerBinary, "attach", id)
cmd.Stdin = tty
stdout, err := cmd.StdoutPipe()
assert.NilError(c, err)
defer stdout.Close()
err = cmd.Start()
assert.NilError(c, err)
assert.NilError(c, waitRun(id))
_, err = cpty.Write([]byte("hello\n"))
assert.NilError(c, err)
out, err = bufio.NewReader(stdout).ReadString('\n')
assert.NilError(c, err)
assert.Equal(c, strings.TrimSpace(out), "hello")
// escape sequence
_, err = cpty.Write([]byte{16})
assert.NilError(c, err)
time.Sleep(100 * time.Millisecond)
_, err = cpty.Write([]byte{17})
assert.NilError(c, err)
ch := make(chan struct{})
go func() {
cmd.Wait()
close(ch)
}()
select {
case <-ch:
case <-time.After(1 * time.Second):
c.Fatal("timed out waiting for container to exit")
}
running := inspectField(c, id, "State.Running")
assert.Equal(c, running, "true") // container should be running
}
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