package main import ( "os" "github.com/containers/libpod/cmd/podman/cliconfig" "github.com/containers/libpod/libpod/adapter" "github.com/containers/libpod/pkg/rootless" "github.com/pkg/errors" "github.com/sirupsen/logrus" "github.com/spf13/cobra" ) var ( exportCommand cliconfig.ExportValues exportDescription = "Exports container's filesystem contents as a tar archive" + " and saves it on the local machine." _exportCommand = &cobra.Command{ Use: "export", Short: "Export container's filesystem contents as a tar archive", Long: exportDescription, RunE: func(cmd *cobra.Command, args []string) error { exportCommand.InputArgs = args exportCommand.GlobalFlags = MainGlobalOpts return exportCmd(&exportCommand) }, Example: "CONTAINER", } ) func init() { exportCommand.Command = _exportCommand flags := exportCommand.Flags() flags.StringVarP(&exportCommand.Output, "output", "o", "/dev/stdout", "Write to a file, default is STDOUT") } // exportCmd saves a container to a tarball on disk func exportCmd(c *cliconfig.ExportValues) error { if os.Geteuid() != 0 { rootless.SetSkipStorageSetup(true) } runtime, err := adapter.GetRuntime(&c.PodmanCommand) if err != nil { return errors.Wrapf(err, "could not get runtime") } defer runtime.Shutdown(false) args := c.InputArgs if len(args) == 0 { return errors.Errorf("container id must be specified") } if len(args) > 1 { return errors.Errorf("too many arguments given, need 1 at most.") } output := c.Output if runtime.Remote && (output == "/dev/stdout" || len(output) == 0) { return errors.New("remote client usage must specify an output file (-o)") } if output == "/dev/stdout" { file := os.Stdout if logrus.IsTerminal(file) { return errors.Errorf("refusing to export to terminal. Use -o flag or redirect") } } if err := validateFileName(output); err != nil { return err } return runtime.Export(args[0], output) }