CA Dynam for VSE User Guide

Tape File Management Utilities
// TLBL SORTIN1,'DSN A',,,,,,8
// TLBL SORTIN2,'DSN B',,,,,,8
// TLBL SORTIN3,'DSN C'
// TLBL SORTIN4,'DSN D'
// TLBL SORTOUT,'DSN E'
// EXEC TDYNASN
ASSGN SORTIN2,SYS003,INPUT
ASSGN SORTIN4,SYS005,INPUT (Equated to SYS003)
ASSGN SORTIN1,SYS002,INPUT
ASSGN SORTIN3,SYS004,INPUT (Equated to SYS002)
/*
Option Four
Locating all input files prior to sorting. This option would have to be used for a
merge where all SORTIN tapes have to be opened at the same time, for
example,
// TLBL SORTIN1,'DSN A'
// TLBL SORTIN2,'DSN B'
// TLBL SORTIN3,'DSN C'
// TLBL SORTIN4,'DSN D'
// TLBL SORTOUT,'DSN E'
// UPSI 1
// EXEC TDYNASN
ASSGN SORTIN1,SYS002,INPUT
ASSGN SORTIN2,SYS003,INPUT
ASSGN SORTIN3,SYS004,INPUT
ASSGN SORTIN4,SYS005,INPUT
/*
OPEN, CLOSE, DETACH, and VTSTOP Functions
TDYNASN performs the OPEN and CLOSE functions so that CA Dynam/T can
control tape files not opened and closed with tape DTFs. Use these functions to
control SYSIPT, SYSLST, SYSPCH, and 1400 Emulator tapes.
The OPEN and CLOSE commands have the same format as the ASSGN
command. They are effective for single volume files only. Volume switching is
not supported.
OPEN Command
The OPEN command does the folllowing:
• Performs an actual open for the tape file
• Invokes AVR to locate a valid scratch
• Makes the assignment
• Writes the header records on the tape
• Leaves the tape positioned following the header records and tape mark
Chapter 3: Supporting Tape File Management 3–5