Korn Shell: Unix and Linux Programming Manual, Third Edition, The By Anatole Olczak
Table of Contents
Appendix G. Pdksh Quick Reference
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:
functionname{commands; }
Local function variables are declared with the typeset command within the function.
Function Commands
return
return from a function
returnn
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 funame
make function name autoloading
typeset ftname
display function commands and arguments as they are executed