IEFBR14
IEFBR14 is a utility program that runs on mainframe computers from IBM. It runs in all mainframe environments derived from OS/360, including z/OS. It is a placeholder that returns the exit status zero, similar to the true command on UNIX-like systems. == Purpose == === Allocation (also called initiation) === On OS/360 and derived mainframe systems, most programs never specify files (usually called datasets) directly, but instead reference them indirectly through the Job Control Language (JCL) statements that invoke the programs.