Requirements for a suid script include:
- #! directing the KornShell be used
 - Executable by user, group, and other
 - No read permission
 - Add suid permission by chmod u+s on the file
 
Add a -p option to #! to increase security to force a separate process if one is not normally done.
Example:
| 
					 1  | 
						#! /usr/bin/ksh -p  | 
					
Source of this information:
http://www.ibm.com/developerworks/aix/library/au-kornshell93.html#n