z/OS DFSORT Application Programming Guide
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Major call 1

z/OS DFSORT Application Programming Guide
SC23-6878-00

Prior to Major Call 1, DFSORT sets the following fields in the EFS interface parameter list:
  • Action code=0

    Major Call 1 is in effect.

  • Informational bit flag 2=0

    The DFSORT run is JCL-invoked.

  • Informational bit flag 3=0

    SORTDIAG is not in effect.

DFSORT calls EFS program EFSPGM at Major Call 1, and EFSPGM sets the following fields in the EFS interface parameter list:
  • Control statement request list

    Contains the OPTION operation definer, which indicates to DFSORT that the OPTION control statement is requested by EFSPGM.

  • EFSPGM program context area

    EFSPGM will be using the context area.

  • Message list=0

    EFSPGM has no messages for DFSORT to print to the message data set. General register 15 is set to zero.

Parent topic: DFSORT initialization phase:

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