Major call 3

At Major Call 3, your EFS program can provide DFSORT with user-written messages to print to the message data set. DFSORT can call the EFS program once for the Blockset technique and once for the Peerage/Vale techniques. DFSORT obtains more information at this call from the EFS program to process the EFS01 and EFS02 exit routines.

At Major Call 3, DFSORT supplies your EFS program with fields in the EFS interface containing:

An action code indicating that Major Call 3 is in effect
An extract buffer offsets list needed by the EFS01 exit routine
A record lengths list of input and output records
Informational flags that describe current processing
An EFS Program Context area (a private communication area for the EFS program).

When the EFS program returns control to DFSORT, it can supply fields in the EFS interface containing:

An EFS01 exit routine address
An EFS02 exit routine address
A list of messages for printing to the message data set
A return code in general register 15.