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Introduction

The SAS/C Library defines the SIGIUCV asynchronous signal in support of programs that want to take advantage of IUCV communications. The library also provides a set of functions that invoke VM IUCV functions and the CMS support of IUCV. The SAS/C functions, when used in conjunction with the SIGIUCV signal, enable programs running in CMS to communicate with other virtual machines, CP system services, or themselves.

This chapter covers the SAS/C IUCV functions. Topics include a brief introduction to IUCV communications in a virtual machine, CMS support of IUCV, IUCV parameter lists and external interrupt data formats, and IUCV library functions.

Although an overview of the IUCV and CMS IUCV functions is provided, this discussion of IUCV communications is written primarily for programmers experienced with IUCV. A knowledge of CP and CMS is assumed. More detailed coverage of all aspects of IUCV can be found in the appropriate IBM publications for your release of VM. For a complete description of how the SAS/C Library supports asynchronous signals and the use of signal-related SAS/C functions, refer to Chapter 5, "Signal-Handling Functions," in SAS/C Library Reference, Volume 1.

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Copyright © 2001 by SAS Institute Inc., Cary, NC, USA. All rights reserved.