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.\" Copyright (c) 1986, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)0.t 8.1 (Berkeley) 6/8/93 .\" .EH 'PSD:21-%''Advanced 4.4BSD IPC Tutorial' .OH 'Advanced 4.4BSD IPC Tutorial''PSD:21-%' .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 An Advanced 4.4BSD Interprocess Communication Tutorial .AU Samuel J. Leffler .AU Robert S. Fabry .AU William N. Joy .AU Phil Lapsley .AI Computer Systems Research Group Department of Electrical Engineering and Computer Science University of California, Berkeley Berkeley, California 94720 .sp 2 .AU Steve Miller .AU Chris Torek .AI Heterogeneous Systems Laboratory Department of Computer Science University of Maryland, College Park College Park, Maryland 20742 .de IR \fI\\$1\fP\\$2 .. .de UX UNIX\\$1 .. .AB .PP .FS * \s-2UNIX\s0 is a trademark of UNIX System Laboratories, Inc. in the US and some other countries. .FE This document provides an introduction to the interprocess communication facilities included in the 4.4BSD release of the .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