Functions
Functions are a form of commands like aliases, and scripts. They differ from Korn shell scripts, in that they do not have to read in from the disk each time they are referenced, so they execute faster. They also provide a way to organize scripts into routines, like in other high-level programming languages. Since functions can have local variables, recursion is possible. Functions are defined with the following format:
function name { commands; }
Local function variables are declared with the typeset command within the function.
Function Commands
| return | return from a function |
| return n | return from a function; pass back return value of n |
| typeset –f | display a list of functions and their definitions |
| typeset +f | display a list of function names only |
| typeset –fu | display a list of autoloading functions |
| typeset –fu name | |
| make function name autoloading | |
| typeset –ft name | |
| display function commands and arguments as they are executed | |
| unset –f name | remove function name |
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