github.com/feiyang21687/docker@v1.5.0/daemon/export.go (about)

     1  package daemon
     2  
     3  import (
     4  	"io"
     5  
     6  	"github.com/docker/docker/engine"
     7  )
     8  
     9  func (daemon *Daemon) ContainerExport(job *engine.Job) engine.Status {
    10  	if len(job.Args) != 1 {
    11  		return job.Errorf("Usage: %s container_id", job.Name)
    12  	}
    13  	name := job.Args[0]
    14  	if container := daemon.Get(name); container != nil {
    15  		data, err := container.Export()
    16  		if err != nil {
    17  			return job.Errorf("%s: %s", name, err)
    18  		}
    19  		defer data.Close()
    20  
    21  		// Stream the entire contents of the container (basically a volatile snapshot)
    22  		if _, err := io.Copy(job.Stdout, data); err != nil {
    23  			return job.Errorf("%s: %s", name, err)
    24  		}
    25  		// FIXME: factor job-specific LogEvent to engine.Job.Run()
    26  		container.LogEvent("export")
    27  		return engine.StatusOK
    28  	}
    29  	return job.Errorf("No such container: %s", name)
    30  }