runc/mount/msmoveroot.go

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// +build linux
package mount
import (
"fmt"
"github.com/dotcloud/docker/pkg/system"
"syscall"
)
func MsMoveRoot(rootfs string) error {
if err := system.Mount(rootfs, "/", "", syscall.MS_MOVE, ""); err != nil {
return fmt.Errorf("mount move %s into / %s", rootfs, err)
}
if err := system.Chroot("."); err != nil {
return fmt.Errorf("chroot . %s", err)
}
return system.Chdir("/")
}