All mainline exits can pass back a return code in register 15. CSFEXIT1, CSFEXIT2, and CSFEXIT3 support these decimal return codes:

Return Code

Description

0

Proceed with initialization.

16

End ICSF.

CSFEXIT4 supports these decimal return codes:

Return Code

Description

0

Proceed with the STOP command.

4

Do not allow the STOP command to proceed.

CSFEXIT5 supports these decimal return codes:

Return Code

Description

0

Continue processing.

4

End ICSF.

Any return codes other than those listed cause ICSF to end abnormally.