Korn Shell Programming by Example

function

Official Description

Defines a function that is referenced by identifier.

Syntax

function identifier {list;}
identifier () {list;}

Options

None

Oddities

function executes more quickly than a separate script execution.

Example

 $ function funcy { # Create function named funcy > print den > } $ $ funcy # Execute function den $ $ integer count=0 $ time while (( count<1000 )) > do > count=count+1 > funcy # Time function called 1000 times > done > /dev/null real 0m0.24s user 0m0.25s sys 0m0.00s $ $ cat do_funcy # Script mimicking function #! /bin/ksh print den $ $ count=0 $ $ time while (( count<1000 )) > do > count=count+1 > . do_funcy # Execute script 1000 times > done > /dev/null real 0m0.79s # Over twice as slow user 0m0.58s sys 0m0.20s ...