.ds lq `` .ds rq '' .de DT .if t .ta .5i 1.25i 2.5i 3.75i .\" 3.5i went to 3.8i .if n .ta .7i 1.75i 3.8i .. .bd S B 3 .TL A 4.2BSD Interprocess Communication Primer .br DRAFT of \*(DY .AU Samuel J. Leffler .AU Robert S. Fabry .AU William N. Joy .AI Computer Systems Research Group Department of Electrical Engineering and Computer Science University of California, Berkeley Berkeley, California 94720 (415) 642-7780 .de IR \fI\\$1\fP\\$2 .. .de UX UNIX\\$1 .. .AB .PP .FS * DEC and VAX are trademarks of Digital Equipment Corporation. .FE .FS ** \s-2UNIX\s0 is a Trademark of Bell Laboratories. .FE This document provides an introduction to the interprocess communication facilities included in the 4.2BSD release of the VAX* .UX ** system. .PP It discusses the overall model for interprocess communication and introduces the interprocess communication primitives which have been added to the system. The majority of the document considers the use of these primitives in developing applications. The reader is expected to be familiar with the C programming language as all examples are written in C. .AE