Functions

• You may have noticed that traps behave like a special form of function. They are called (or invoked) by an event and consist of a collection of command statements. This is not an accident.

• To unset (delete or remove) a function:

unset -f functionname

• To list defined function names (note: my system seems to have over 400 functions, of which I have only defined 4 of my own):

declare -F | less

• To list functions and definitions:

declare -f [functionname]