Re: What is an EXIT program?

Hopefully Bruce Vining will reply also (He KNOWS Exit Programs area!!)

IBM has provided Exit programs as a vehicle for "hooking" into certain functions
in the system.
An example is the FRP exit point. When the FTP process see's an exit point, it
checks tosee if there are any user programs registered for that exitpoint. If
there is, the proogram is called, passing the predefined data structure. After
the user program completes, information is passed back to the IBM program, which
uses the returned information to determine what action to take. An example would
be an Exit Point for FTP signon. The user program could perform additional
validation (possible time of day, for ecxample). If the user program secided not
to allow the user to have FTP access, a particular value would be returned to 
the
IBM program. The IBM program would then end, issuing an error message in the
process.

Also, developers may create there own exit points using IBM's registration
facilities and EP APIs.
Although it sounds complicated, remember, IBM's program is just calling another
program, in this case yours. And your program is just setting return "codes" for
the calling program.
HTH
Bob Larkin
blarkin@wt.net


BKstaple@aol.com wrote:

> Greetings All;
>
> What is an Exit program and what would you use one for?
>
> +---
> | This is the Midrange System Mailing List!
> | To submit a new message, send your mail to MIDRANGE-L@midrange.com.
> | To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com.
> | To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
> | Questions should be directed to the list owner/operator: david@midrange.com
> +---

begin:          vcard
fn:             Bob Larkin
n:              Larkin;Bob
org:            <A HREF="HTTP://web.wt.net/~blarkin/">Larkin Computer Consulting</A>
adr:            <A HREF="http://web.wt.net/~blarkin/">Bob and Diana's Page</A>;;;Houston;TX;<A HREF="http://web.wt.net/~blarkin/">;United States
email;internet: blarkin@wt.net
title:          Systems Consultant
x-mozilla-cpt:  ;4104
x-mozilla-html: FALSE
version:        2.1
end:            vcard