The Open Group Base Specifications, Issue 6 IEEE Std 1003.1, 2004 Edition
Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.

### Special Built-in Utilities

- break - exit from for, while, or until loop (Special Built-in Utility)
- colon - null utility (Special Built-in Utility)
- continue - continue for, while or until loop (Special Built-in Utility)
- dot - execute commands in current environment (Special Built-in Utility)
- eval - construct command by concatenating arguments (Special Built-in Utility)
- exec - execute commands and open, close, or copy file descriptors (Special Built-in Utility)
- exit - cause the shell to exit (Special Built-in Utility)
- export - set export attribute for variables (Special Built-in Utility)
- readonly - set read-only attribute for variables (Special Built-in Utility)
- return - return from a function (Special Built-in Utility)
- set - set or unset options and positional parameters (Special Built-in Utility)
- shift - shift positional parameters (Special Built-in Utility)
- times - write process times (Special Built-in Utility)
- trap - trap signals (Special Built-in Utility)
- unset - unset values and attributes of variables and functions (Special Built-in Utility)

Copyright © 2001-2004 The IEEE and The Open Group, All Rights Reserved