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zatlas · Beginner Joined: 17 Dec 2002 Posts: 43 Topics: 4

I am new to Rexx and mainframe Rexx, but I need to learn fast.
Please point me to the correct documentation or guide me.
I need to call programs that are coded in C from mainframe Rexx in z/OS (NOT using Unix Services.)

Is there a way to call C program directly from Rexx? [i.e. CALL xxx or rc=xxx()] If so how is it done?

If not what would be the standard so I can issue "XXX ()" and access the result or same question with using ADDRESS.

Thanks
ZA

kolusu · Posted: Mon Jul 18, 2011 10:14 am Post subject:

zatlas,

Try this Calling C functions from Rexx

Kolusu

superk · Advanced Joined: 19 Dec 2002 Posts: 684 Topics: 5

I'm curious, how is a program coded in 'C' different from other programs coded in languages like COBOL or PLI or Assembler?

zatlas · Beginner Joined: 17 Dec 2002 Posts: 43 Topics: 4

Thanks
Kolusu, I specifically need mainframe, z/OS, no Unix services (good ol' Rexx)!

Superk, yes it is not different. Please guide me to how to do it in any z/os native language and I will be good. When I say guid me, I mean point me to the correct book/chapter or article. I will do the rest.

ZA

papadi · Supermod Joined: 20 Oct 2009 Posts: 594 Topics: 1

Suggest you ask others who use your system to show you a couple of examples of existing rexx calling COBOL or Assembler modules.

What you need to do will be very similar. . .

At run time, the system does not care much about the source language. A proper load module should work with no problems. Possibly a good first test is the popular "Hello World" program.

There may be prior topics in the forum that can help. Here is one:
http://www.mvsforums.com/helpboards/viewtopic.php?t=8020
_________________
All the best,

di

zatlas · Beginner Joined: 17 Dec 2002 Posts: 43 Topics: 4

Hi Papadi
Unfortunately, there is no one here to help me, a remote lowly consultant. On the other hand the link-chain you've mentioned, seems to be very interesting. I will try it within a short time.
thank you
ZA

rlilley · Beginner Joined: 05 Apr 2010 Posts: 19 Topics: 3

Here are a couple examples of how I call my C programs from REXX code

if running under ISPF:

address ispexec "SELECT PGM(Cpgmname) PARM(pgmparms)"

using LINKMVS:

ADDRESS LINKMVS 'Cpgmname' P1 P2 P3 P4

zatlas · Beginner Joined: 17 Dec 2002 Posts: 43 Topics: 4

Thank you all
ZA

asr2 · Posted: Fri Jul 22, 2011 2:46 am Post subject:

My book, Practical Usage of TSO REXX, also available as e-book (PDF), provides a very comprehensive discussion, with code examples, of using REXX with various programming languages (Assembler, C, COBOL, PLI).

Regards
Tony