| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/docker/docker/daemon/graphdriver | |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| path | Package path implements utility routines for manipulating slash-separated paths. |
| syscall | Package syscall contains an interface to the low-level operating system primitives. |
| testing | Package testing provides support for automated testing of Go packages. |