package main import ( "fmt" "io/ioutil" "os" "path/filepath" "strconv" "strings" "github.com/containers/libpod/cmd/podman/libpodruntime" "github.com/containers/libpod/libpod" "github.com/containers/libpod/pkg/rootless" "github.com/pkg/errors" "github.com/sirupsen/logrus" "github.com/urfave/cli" ) var runDescription = "Runs a command in a new container from the given image" var runFlags []cli.Flag = append(createFlags, cli.BoolTFlag{ Name: "sig-proxy", Usage: "Proxy received signals to the process (default true)", }) var runCommand = cli.Command{ Name: "run", Usage: "Run a command in a new container", Description: runDescription, Flags: sortFlags(runFlags), Action: runCmd, ArgsUsage: "IMAGE [COMMAND [ARG...]]", HideHelp: true, SkipArgReorder: true, UseShortOptionHandling: true, OnUsageError: usageErrorHandler, } func runCmd(c *cli.Context) error { if err := createInit(c); err != nil { return err } if os.Geteuid() != 0 { rootless.SetSkipStorageSetup(true) } runtime, err := libpodruntime.GetRuntime(c) if err != nil { return errors.Wrapf(err, "error creating libpod runtime") } defer runtime.Shutdown(false) ctr, createConfig, err := createContainer(c, runtime) if err != nil { return err } if logrus.GetLevel() == logrus.DebugLevel { cgroupPath, err := ctr.CGroupPath() if err == nil { logrus.Debugf("container %q has CgroupParent %q", ctr.ID(), cgroupPath) } } ctx := getContext() // Handle detached start if createConfig.Detach { if err := ctr.Start(ctx); err != nil { // This means the command did not exist exitCode = 127 if strings.Index(err.Error(), "permission denied") > -1 { exitCode = 126 } return err } fmt.Printf("%s\n", ctr.ID()) exitCode = 0 return nil } outputStream := os.Stdout errorStream := os.Stderr inputStream := os.Stdin // If -i is not set, clear stdin if !c.Bool("interactive") { inputStream = nil } // If attach is set, clear stdin/stdout/stderr and only attach requested if c.IsSet("attach") || c.IsSet("a") { outputStream = nil errorStream = nil if !c.Bool("interactive") { inputStream = nil } attachTo := c.StringSlice("attach") for _, stream := range attachTo { switch strings.ToLower(stream) { case "stdout": outputStream = os.Stdout case "stderr": errorStream = os.Stderr case "stdin": inputStream = os.Stdin default: return errors.Wrapf(libpod.ErrInvalidArg, "invalid stream %q for --attach - must be one of stdin, stdout, or stderr", stream) } } } if err := startAttachCtr(ctr, outputStream, errorStream, inputStream, c.String("detach-keys"), c.BoolT("sig-proxy"), true); err != nil { // This means the command did not exist exitCode = 127 if strings.Index(err.Error(), "permission denied") > -1 { exitCode = 126 } if c.IsSet("rm") { if deleteError := runtime.RemoveContainer(ctx, ctr, true); deleteError != nil { logrus.Errorf("unable to remove container %s after failing to start and attach to it", ctr.ID()) } } return err } if ecode, err := ctr.Wait(); err != nil { if errors.Cause(err) == libpod.ErrNoSuchCtr { // The container may have been removed // Go looking for an exit file ctrExitCode, err := readExitFile(runtime.GetConfig().TmpDir, ctr.ID()) if err != nil { logrus.Errorf("Cannot get exit code: %v", err) exitCode = 127 } else { exitCode = ctrExitCode } } } else { exitCode = int(ecode) } if createConfig.Rm { return runtime.RemoveContainer(ctx, ctr, true) } if err := ctr.Cleanup(ctx); err != nil { // If the container has been removed already, no need to error on cleanup // Also, if it was restarted, don't error either if errors.Cause(err) == libpod.ErrNoSuchCtr || errors.Cause(err) == libpod.ErrCtrRemoved || errors.Cause(err) == libpod.ErrCtrStateInvalid { return nil } return err } return nil } // Read a container's exit file func readExitFile(runtimeTmp, ctrID string) (int, error) { exitFile := filepath.Join(runtimeTmp, "exits", ctrID) logrus.Debugf("Attempting to read container %s exit code from file %s", ctrID, exitFile) // Check if it exists if _, err := os.Stat(exitFile); err != nil { return 0, errors.Wrapf(err, "error getting exit file for container %s", ctrID) } // File exists, read it in and convert to int statusStr, err := ioutil.ReadFile(exitFile) if err != nil { return 0, errors.Wrapf(err, "error reading exit file for container %s", ctrID) } exitCode, err := strconv.Atoi(string(statusStr)) if err != nil { return 0, errors.Wrapf(err, "error parsing exit code for container %s", ctrID) } return exitCode, nil }