package client import ( "fmt" "io" "strings" "github.com/docker/docker/api/types" "github.com/docker/docker/pkg/archive" flag "github.com/docker/docker/pkg/mflag" ) // CmdCp copies files/folders from a path on the container to a directory on the host running the command. // // If HOSTDIR is '-', the data is written as a tar file to STDOUT. // // Usage: docker cp CONTAINER:PATH HOSTDIR func (cli *DockerCli) CmdCp(args ...string) error { cmd := cli.Subcmd("cp", "CONTAINER:PATH HOSTDIR|-", "Copy files/folders from a PATH on the container to a HOSTDIR on the host\nrunning the command. Use '-' to write the data\nas a tar file to STDOUT.", true) cmd.Require(flag.Exact, 2) cmd.ParseFlags(args, true) // deal with path name with `:` info := strings.SplitN(cmd.Arg(0), ":", 2) if len(info) != 2 { return fmt.Errorf("Error: Path not specified") } cfg := &types.CopyConfig{ Resource: info[1], } stream, statusCode, err := cli.call("POST", "/containers/"+info[0]+"/copy", cfg, nil) if stream != nil { defer stream.Close() } if statusCode == 404 { return fmt.Errorf("No such container: %v", info[0]) } if err != nil { return err } hostPath := cmd.Arg(1) if statusCode == 200 { if hostPath == "-" { _, err = io.Copy(cli.out, stream) } else { err = archive.Untar(stream, hostPath, &archive.TarOptions{NoLchown: true}) } if err != nil { return err } } return nil }