654 lines
16 KiB
Go
654 lines
16 KiB
Go
// +build !test_no_exec
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package main
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import (
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"bufio"
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"reflect"
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"sort"
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"strings"
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"sync"
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"time"
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"github.com/go-check/check"
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)
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func (s *DockerSuite) TestExec(c *check.C) {
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runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "testing", "busybox", "sh", "-c", "echo test > /tmp/file && top")
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if out, _, _, err := runCommandWithStdoutStderr(runCmd); err != nil {
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c.Fatal(out, err)
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}
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execCmd := exec.Command(dockerBinary, "exec", "testing", "cat", "/tmp/file")
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out, _, err := runCommandWithOutput(execCmd)
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if err != nil {
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c.Fatal(out, err)
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}
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out = strings.Trim(out, "\r\n")
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if expected := "test"; out != expected {
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c.Errorf("container exec should've printed %q but printed %q", expected, out)
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}
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}
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func (s *DockerSuite) TestExecInteractive(c *check.C) {
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runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "testing", "busybox", "sh", "-c", "echo test > /tmp/file && top")
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if out, _, _, err := runCommandWithStdoutStderr(runCmd); err != nil {
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c.Fatal(out, err)
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}
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execCmd := exec.Command(dockerBinary, "exec", "-i", "testing", "sh")
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stdin, err := execCmd.StdinPipe()
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if err != nil {
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c.Fatal(err)
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}
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stdout, err := execCmd.StdoutPipe()
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if err != nil {
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c.Fatal(err)
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}
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if err := execCmd.Start(); err != nil {
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c.Fatal(err)
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}
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if _, err := stdin.Write([]byte("cat /tmp/file\n")); err != nil {
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c.Fatal(err)
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}
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r := bufio.NewReader(stdout)
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line, err := r.ReadString('\n')
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if err != nil {
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c.Fatal(err)
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}
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line = strings.TrimSpace(line)
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if line != "test" {
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c.Fatalf("Output should be 'test', got '%q'", line)
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}
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if err := stdin.Close(); err != nil {
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c.Fatal(err)
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}
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errChan := make(chan error)
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go func() {
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errChan <- execCmd.Wait()
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close(errChan)
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}()
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select {
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case err := <-errChan:
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c.Assert(err, check.IsNil)
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case <-time.After(1 * time.Second):
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c.Fatal("docker exec failed to exit on stdin close")
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}
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}
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func (s *DockerSuite) TestExecAfterContainerRestart(c *check.C) {
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runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "top")
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out, _, err := runCommandWithOutput(runCmd)
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if err != nil {
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c.Fatal(out, err)
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}
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cleanedContainerID := strings.TrimSpace(out)
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runCmd = exec.Command(dockerBinary, "restart", cleanedContainerID)
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if out, _, err = runCommandWithOutput(runCmd); err != nil {
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c.Fatal(out, err)
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}
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runCmd = exec.Command(dockerBinary, "exec", cleanedContainerID, "echo", "hello")
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out, _, err = runCommandWithOutput(runCmd)
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if err != nil {
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c.Fatal(out, err)
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}
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outStr := strings.TrimSpace(out)
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if outStr != "hello" {
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c.Errorf("container should've printed hello, instead printed %q", outStr)
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}
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}
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func (s *DockerDaemonSuite) TestExecAfterDaemonRestart(c *check.C) {
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testRequires(c, SameHostDaemon)
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if err := s.d.StartWithBusybox(); err != nil {
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c.Fatalf("Could not start daemon with busybox: %v", err)
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}
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if out, err := s.d.Cmd("run", "-d", "--name", "top", "-p", "80", "busybox:latest", "top"); err != nil {
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c.Fatalf("Could not run top: err=%v\n%s", err, out)
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}
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if err := s.d.Restart(); err != nil {
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c.Fatalf("Could not restart daemon: %v", err)
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}
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if out, err := s.d.Cmd("start", "top"); err != nil {
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c.Fatalf("Could not start top after daemon restart: err=%v\n%s", err, out)
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}
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out, err := s.d.Cmd("exec", "top", "echo", "hello")
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if err != nil {
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c.Fatalf("Could not exec on container top: err=%v\n%s", err, out)
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}
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outStr := strings.TrimSpace(string(out))
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if outStr != "hello" {
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c.Errorf("container should've printed hello, instead printed %q", outStr)
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}
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}
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// Regression test for #9155, #9044
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func (s *DockerSuite) TestExecEnv(c *check.C) {
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runCmd := exec.Command(dockerBinary, "run",
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"-e", "LALA=value1",
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"-e", "LALA=value2",
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"-d", "--name", "testing", "busybox", "top")
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if out, _, _, err := runCommandWithStdoutStderr(runCmd); err != nil {
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c.Fatal(out, err)
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}
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execCmd := exec.Command(dockerBinary, "exec", "testing", "env")
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out, _, err := runCommandWithOutput(execCmd)
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if err != nil {
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c.Fatal(out, err)
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}
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if strings.Contains(out, "LALA=value1") ||
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!strings.Contains(out, "LALA=value2") ||
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!strings.Contains(out, "HOME=/root") {
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c.Errorf("exec env(%q), expect %q, %q", out, "LALA=value2", "HOME=/root")
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}
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}
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func (s *DockerSuite) TestExecExitStatus(c *check.C) {
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runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "top", "busybox", "top")
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if out, _, _, err := runCommandWithStdoutStderr(runCmd); err != nil {
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c.Fatal(out, err)
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}
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// Test normal (non-detached) case first
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cmd := exec.Command(dockerBinary, "exec", "top", "sh", "-c", "exit 23")
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ec, _ := runCommand(cmd)
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if ec != 23 {
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c.Fatalf("Should have had an ExitCode of 23, not: %d", ec)
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}
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}
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func (s *DockerSuite) TestExecPausedContainer(c *check.C) {
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defer unpauseAllContainers()
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runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "testing", "busybox", "top")
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out, _, err := runCommandWithOutput(runCmd)
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if err != nil {
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c.Fatal(out, err)
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}
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ContainerID := strings.TrimSpace(out)
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pausedCmd := exec.Command(dockerBinary, "pause", "testing")
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out, _, _, err = runCommandWithStdoutStderr(pausedCmd)
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if err != nil {
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c.Fatal(out, err)
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}
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execCmd := exec.Command(dockerBinary, "exec", "-i", "-t", ContainerID, "echo", "hello")
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out, _, err = runCommandWithOutput(execCmd)
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if err == nil {
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c.Fatal("container should fail to exec new command if it is paused")
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}
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expected := ContainerID + " is paused, unpause the container before exec"
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if !strings.Contains(out, expected) {
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c.Fatal("container should not exec new command if it is paused")
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}
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}
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// regression test for #9476
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func (s *DockerSuite) TestExecTtyCloseStdin(c *check.C) {
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cmd := exec.Command(dockerBinary, "run", "-d", "-it", "--name", "exec_tty_stdin", "busybox")
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if out, _, err := runCommandWithOutput(cmd); err != nil {
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c.Fatal(out, err)
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}
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cmd = exec.Command(dockerBinary, "exec", "-i", "exec_tty_stdin", "cat")
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stdinRw, err := cmd.StdinPipe()
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if err != nil {
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c.Fatal(err)
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}
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stdinRw.Write([]byte("test"))
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stdinRw.Close()
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if out, _, err := runCommandWithOutput(cmd); err != nil {
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c.Fatal(out, err)
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}
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cmd = exec.Command(dockerBinary, "top", "exec_tty_stdin")
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out, _, err := runCommandWithOutput(cmd)
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if err != nil {
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c.Fatal(out, err)
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}
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outArr := strings.Split(out, "\n")
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if len(outArr) > 3 || strings.Contains(out, "nsenter-exec") {
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// This is the really bad part
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if out, _, err := runCommandWithOutput(exec.Command(dockerBinary, "rm", "-f", "exec_tty_stdin")); err != nil {
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c.Fatal(out, err)
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}
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c.Fatalf("exec process left running\n\t %s", out)
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}
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}
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func (s *DockerSuite) TestExecTtyWithoutStdin(c *check.C) {
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cmd := exec.Command(dockerBinary, "run", "-d", "-ti", "busybox")
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out, _, err := runCommandWithOutput(cmd)
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if err != nil {
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c.Fatalf("failed to start container: %v (%v)", out, err)
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}
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id := strings.TrimSpace(out)
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if err := waitRun(id); err != nil {
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c.Fatal(err)
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}
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defer func() {
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cmd := exec.Command(dockerBinary, "kill", id)
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if out, _, err := runCommandWithOutput(cmd); err != nil {
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c.Fatalf("failed to kill container: %v (%v)", out, err)
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}
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}()
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errChan := make(chan error)
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go func() {
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defer close(errChan)
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cmd := exec.Command(dockerBinary, "exec", "-ti", id, "true")
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if _, err := cmd.StdinPipe(); err != nil {
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errChan <- err
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return
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}
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expected := "cannot enable tty mode"
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if out, _, err := runCommandWithOutput(cmd); err == nil {
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errChan <- fmt.Errorf("exec should have failed")
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return
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} else if !strings.Contains(out, expected) {
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errChan <- fmt.Errorf("exec failed with error %q: expected %q", out, expected)
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return
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}
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}()
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select {
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case err := <-errChan:
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c.Assert(err, check.IsNil)
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case <-time.After(3 * time.Second):
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c.Fatal("exec is running but should have failed")
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}
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}
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func (s *DockerSuite) TestExecParseError(c *check.C) {
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runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "top", "busybox", "top")
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if out, _, err := runCommandWithOutput(runCmd); err != nil {
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c.Fatal(out, err)
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}
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// Test normal (non-detached) case first
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cmd := exec.Command(dockerBinary, "exec", "top")
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if _, stderr, code, err := runCommandWithStdoutStderr(cmd); err == nil || !strings.Contains(stderr, "See '"+dockerBinary+" exec --help'") || code == 0 {
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c.Fatalf("Should have thrown error & point to help: %s", stderr)
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}
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}
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func (s *DockerSuite) TestExecStopNotHanging(c *check.C) {
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runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "testing", "busybox", "top")
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if out, _, err := runCommandWithOutput(runCmd); err != nil {
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c.Fatal(out, err)
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}
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if err := exec.Command(dockerBinary, "exec", "testing", "top").Start(); err != nil {
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c.Fatal(err)
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}
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type dstop struct {
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out []byte
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err error
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}
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ch := make(chan dstop)
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go func() {
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out, err := exec.Command(dockerBinary, "stop", "testing").CombinedOutput()
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ch <- dstop{out, err}
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close(ch)
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}()
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select {
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case <-time.After(3 * time.Second):
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c.Fatal("Container stop timed out")
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case s := <-ch:
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c.Assert(s.err, check.IsNil)
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}
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}
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func (s *DockerSuite) TestExecCgroup(c *check.C) {
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var cmd *exec.Cmd
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cmd = exec.Command(dockerBinary, "run", "-d", "--name", "testing", "busybox", "top")
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_, err := runCommand(cmd)
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if err != nil {
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c.Fatal(err)
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}
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cmd = exec.Command(dockerBinary, "exec", "testing", "cat", "/proc/1/cgroup")
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out, _, err := runCommandWithOutput(cmd)
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if err != nil {
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c.Fatal(out, err)
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}
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containerCgroups := sort.StringSlice(strings.Split(string(out), "\n"))
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var wg sync.WaitGroup
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var mu sync.Mutex
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execCgroups := []sort.StringSlice{}
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errChan := make(chan error)
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// exec a few times concurrently to get consistent failure
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for i := 0; i < 5; i++ {
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wg.Add(1)
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go func() {
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cmd := exec.Command(dockerBinary, "exec", "testing", "cat", "/proc/self/cgroup")
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out, _, err := runCommandWithOutput(cmd)
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if err != nil {
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errChan <- err
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return
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}
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cg := sort.StringSlice(strings.Split(string(out), "\n"))
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mu.Lock()
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execCgroups = append(execCgroups, cg)
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mu.Unlock()
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wg.Done()
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}()
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}
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wg.Wait()
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close(errChan)
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for err := range errChan {
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c.Assert(err, check.IsNil)
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}
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for _, cg := range execCgroups {
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if !reflect.DeepEqual(cg, containerCgroups) {
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fmt.Println("exec cgroups:")
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for _, name := range cg {
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fmt.Printf(" %s\n", name)
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}
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fmt.Println("container cgroups:")
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for _, name := range containerCgroups {
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fmt.Printf(" %s\n", name)
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}
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c.Fatal("cgroups mismatched")
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}
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}
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}
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func (s *DockerSuite) TestInspectExecID(c *check.C) {
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out, exitCode, err := runCommandWithOutput(exec.Command(dockerBinary, "run", "-d", "busybox", "top"))
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if exitCode != 0 || err != nil {
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c.Fatalf("failed to run container: %s, %v", out, err)
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}
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id := strings.TrimSuffix(out, "\n")
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out, err = inspectField(id, "ExecIDs")
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if err != nil {
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c.Fatalf("failed to inspect container: %s, %v", out, err)
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}
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if out != "[]" {
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c.Fatalf("ExecIDs should be empty, got: %s", out)
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}
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exitCode, err = runCommand(exec.Command(dockerBinary, "exec", "-d", id, "ls", "/"))
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if exitCode != 0 || err != nil {
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c.Fatalf("failed to exec in container: %s, %v", out, err)
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}
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out, err = inspectField(id, "ExecIDs")
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if err != nil {
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c.Fatalf("failed to inspect container: %s, %v", out, err)
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}
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out = strings.TrimSuffix(out, "\n")
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if out == "[]" || out == "<no value>" {
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c.Fatalf("ExecIDs should not be empty, got: %s", out)
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}
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}
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func (s *DockerSuite) TestLinksPingLinkedContainersOnRename(c *check.C) {
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var out string
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out, _ = dockerCmd(c, "run", "-d", "--name", "container1", "busybox", "top")
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idA := strings.TrimSpace(out)
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if idA == "" {
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c.Fatal(out, "id should not be nil")
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}
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out, _ = dockerCmd(c, "run", "-d", "--link", "container1:alias1", "--name", "container2", "busybox", "top")
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idB := strings.TrimSpace(out)
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if idB == "" {
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c.Fatal(out, "id should not be nil")
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}
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execCmd := exec.Command(dockerBinary, "exec", "container2", "ping", "-c", "1", "alias1", "-W", "1")
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out, _, err := runCommandWithOutput(execCmd)
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if err != nil {
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c.Fatal(out, err)
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}
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dockerCmd(c, "rename", "container1", "container_new")
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execCmd = exec.Command(dockerBinary, "exec", "container2", "ping", "-c", "1", "alias1", "-W", "1")
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out, _, err = runCommandWithOutput(execCmd)
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if err != nil {
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c.Fatal(out, err)
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}
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}
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func (s *DockerSuite) TestRunExecDir(c *check.C) {
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testRequires(c, SameHostDaemon)
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cmd := exec.Command(dockerBinary, "run", "-d", "busybox", "top")
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out, _, err := runCommandWithOutput(cmd)
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if err != nil {
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c.Fatal(err, out)
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}
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id := strings.TrimSpace(out)
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execDir := filepath.Join(execDriverPath, id)
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stateFile := filepath.Join(execDir, "state.json")
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{
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fi, err := os.Stat(execDir)
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if err != nil {
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c.Fatal(err)
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}
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if !fi.IsDir() {
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c.Fatalf("%q must be a directory", execDir)
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}
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fi, err = os.Stat(stateFile)
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if err != nil {
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c.Fatal(err)
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}
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}
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stopCmd := exec.Command(dockerBinary, "stop", id)
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out, _, err = runCommandWithOutput(stopCmd)
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if err != nil {
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c.Fatal(err, out)
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}
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{
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_, err := os.Stat(execDir)
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if err == nil {
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c.Fatal(err)
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}
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if err == nil {
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c.Fatalf("Exec directory %q exists for removed container!", execDir)
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}
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if !os.IsNotExist(err) {
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c.Fatalf("Error should be about non-existing, got %s", err)
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}
|
|
}
|
|
startCmd := exec.Command(dockerBinary, "start", id)
|
|
out, _, err = runCommandWithOutput(startCmd)
|
|
if err != nil {
|
|
c.Fatal(err, out)
|
|
}
|
|
{
|
|
fi, err := os.Stat(execDir)
|
|
if err != nil {
|
|
c.Fatal(err)
|
|
}
|
|
if !fi.IsDir() {
|
|
c.Fatalf("%q must be a directory", execDir)
|
|
}
|
|
fi, err = os.Stat(stateFile)
|
|
if err != nil {
|
|
c.Fatal(err)
|
|
}
|
|
}
|
|
rmCmd := exec.Command(dockerBinary, "rm", "-f", id)
|
|
out, _, err = runCommandWithOutput(rmCmd)
|
|
if err != nil {
|
|
c.Fatal(err, out)
|
|
}
|
|
{
|
|
_, err := os.Stat(execDir)
|
|
if err == nil {
|
|
c.Fatal(err)
|
|
}
|
|
if err == nil {
|
|
c.Fatalf("Exec directory %q is exists for removed container!", execDir)
|
|
}
|
|
if !os.IsNotExist(err) {
|
|
c.Fatalf("Error should be about non-existing, got %s", err)
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
func (s *DockerSuite) TestRunMutableNetworkFiles(c *check.C) {
|
|
testRequires(c, SameHostDaemon)
|
|
|
|
for _, fn := range []string{"resolv.conf", "hosts"} {
|
|
deleteAllContainers()
|
|
|
|
content, err := runCommandAndReadContainerFile(fn, exec.Command(dockerBinary, "run", "-d", "--name", "c1", "busybox", "sh", "-c", fmt.Sprintf("echo success >/etc/%s && top", fn)))
|
|
if err != nil {
|
|
c.Fatal(err)
|
|
}
|
|
|
|
if strings.TrimSpace(string(content)) != "success" {
|
|
c.Fatal("Content was not what was modified in the container", string(content))
|
|
}
|
|
|
|
out, _, err := runCommandWithOutput(exec.Command(dockerBinary, "run", "-d", "--name", "c2", "busybox", "top"))
|
|
if err != nil {
|
|
c.Fatal(err)
|
|
}
|
|
|
|
contID := strings.TrimSpace(out)
|
|
|
|
netFilePath := containerStorageFile(contID, fn)
|
|
|
|
f, err := os.OpenFile(netFilePath, os.O_WRONLY|os.O_SYNC|os.O_APPEND, 0644)
|
|
if err != nil {
|
|
c.Fatal(err)
|
|
}
|
|
|
|
if _, err := f.Seek(0, 0); err != nil {
|
|
f.Close()
|
|
c.Fatal(err)
|
|
}
|
|
|
|
if err := f.Truncate(0); err != nil {
|
|
f.Close()
|
|
c.Fatal(err)
|
|
}
|
|
|
|
if _, err := f.Write([]byte("success2\n")); err != nil {
|
|
f.Close()
|
|
c.Fatal(err)
|
|
}
|
|
f.Close()
|
|
|
|
res, err := exec.Command(dockerBinary, "exec", contID, "cat", "/etc/"+fn).CombinedOutput()
|
|
if err != nil {
|
|
c.Fatalf("Output: %s, error: %s", res, err)
|
|
}
|
|
if string(res) != "success2\n" {
|
|
c.Fatalf("Expected content of %s: %q, got: %q", fn, "success2\n", res)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (s *DockerSuite) TestExecWithUser(c *check.C) {
|
|
runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "parent", "busybox", "top")
|
|
if out, _, err := runCommandWithOutput(runCmd); err != nil {
|
|
c.Fatal(out, err)
|
|
}
|
|
|
|
cmd := exec.Command(dockerBinary, "exec", "-u", "1", "parent", "id")
|
|
out, _, err := runCommandWithOutput(cmd)
|
|
if err != nil {
|
|
c.Fatal(err, out)
|
|
}
|
|
if !strings.Contains(out, "uid=1(daemon) gid=1(daemon)") {
|
|
c.Fatalf("exec with user by id expected daemon user got %s", out)
|
|
}
|
|
|
|
cmd = exec.Command(dockerBinary, "exec", "-u", "root", "parent", "id")
|
|
out, _, err = runCommandWithOutput(cmd)
|
|
if err != nil {
|
|
c.Fatal(err, out)
|
|
}
|
|
if !strings.Contains(out, "uid=0(root) gid=0(root)") {
|
|
c.Fatalf("exec with user by root expected root user got %s", out)
|
|
}
|
|
|
|
}
|
|
|
|
func (s *DockerSuite) TestExecWithImageUser(c *check.C) {
|
|
name := "testbuilduser"
|
|
_, err := buildImage(name,
|
|
`FROM busybox
|
|
RUN echo 'dockerio:x:1001:1001::/bin:/bin/false' >> /etc/passwd
|
|
USER dockerio`,
|
|
true)
|
|
if err != nil {
|
|
c.Fatalf("Could not build image %s: %v", name, err)
|
|
}
|
|
|
|
dockerCmd(c, "run", "-d", "--name", "dockerioexec", name, "top")
|
|
|
|
out, _ := dockerCmd(c, "exec", "dockerioexec", "whoami")
|
|
if !strings.Contains(out, "dockerio") {
|
|
c.Fatalf("exec with user by id expected dockerio user got %s", out)
|
|
}
|
|
}
|