| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/docker/docker/daemon/logger | Package logger defines interfaces that logger drivers implement to log messages. |
| log/syslog | Package syslog provides a simple interface to the system log service. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| path | Package path implements utility routines for manipulating slash-separated paths. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |