Return container exit code with start -a/-i

Addresses #8555

Docker-DCO-1.1-Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com>

integration-cli/docker_cli_start_test.go

@@ -1,7 +1,9 @@
 package main
 
 import (
+	"fmt"
 	"os/exec"
+	"strings"
 	"testing"
 	"time"
 )
@@ -36,3 +38,33 @@ func TestStartAttachReturnsOnError(t *testing.T) {
 
 	logDone("start - error on start with attach exits")
 }
+
+// gh#8555: Exit code should be passed through when using start -a
+func TestStartAttachCorrectExitCode(t *testing.T) {
+	defer deleteAllContainers()
+
+	runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "sh", "-c", "sleep 2; exit 1")
+	out, _, _, err := runCommandWithStdoutStderr(runCmd)
+	if err != nil {
+		t.Fatalf("failed to run container: %v, output: %q", err, out)
+	}
+
+	out = stripTrailingCharacters(out)
+
+	// make sure the container has exited before trying the "start -a"
+	waitCmd := exec.Command(dockerBinary, "wait", out)
+	if out, _, err = runCommandWithOutput(waitCmd); err != nil {
+		t.Fatal(out, err)
+	}
+
+	startCmd := exec.Command(dockerBinary, "start", "-a", out)
+	startOut, exitCode, err := runCommandWithOutput(startCmd)
+	if err != nil && !strings.Contains("exit status 1", fmt.Sprintf("%s", err)) {
+		t.Fatalf("start command failed unexpectedly with error: %v, output: %q", err, startOut)
+	}
+	if exitCode != 1 {
+		t.Fatalf("start -a did not respond with proper exit code: expected 1, got %d", exitCode)
+	}
+
+	logDone("start - correct exit code returned with -a")
+}