<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <!--Converted with LaTeX2HTML 96.1-c (Feb 29, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds --> <HTML> <HEAD> <TITLE>6.4.2 Message Queues</TITLE> <META NAME="description" CONTENT="6.4.2 Message Queues"> <META NAME="keywords" CONTENT="lpg"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <LINK REL=STYLESHEET HREF="lpg.css"> </HEAD> <BODY LANG="EN"> <A NAME="tex2html705" HREF="node28.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="/icons//next_motif.gif"></A> <A NAME="tex2html703" HREF="node21.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="/icons//up_motif.gif"></A> <A NAME="tex2html697" HREF="node26.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="/icons//previous_motif.gif"></A> <A NAME="tex2html707" HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="/icons//contents_motif.gif"></A> <BR> <B> Next:</B> <A NAME="tex2html706" HREF="node28.html">Basic Concepts</A> <B>Up:</B> <A NAME="tex2html704" HREF="node21.html">6.4 System V IPC</A> <B> Previous:</B> <A NAME="tex2html698" HREF="node26.html">The ipcrm Command</A> <BR> <P> <H2><A NAME="SECTION00742000000000000000">6.4.2 Message Queues</A></H2> <P> <BR> <HR> <UL> <LI> <A NAME="tex2html708" HREF="node28.html#SECTION00742100000000000000">Basic Concepts</A> <LI> <A NAME="tex2html709" HREF="node29.html#SECTION00742200000000000000">Internal and User Data Structures</A> <UL> <LI> <A NAME="tex2html710" HREF="node30.html#SECTION00742210000000000000">Message buffer</A> <LI> <A NAME="tex2html711" HREF="node31.html#SECTION00742220000000000000">Kernel <TT>msg</TT> structure</A> <LI> <A NAME="tex2html712" HREF="node32.html#SECTION00742230000000000000">Kernel <TT>msqid_ds</TT> structure</A> <LI> <A NAME="tex2html713" HREF="node33.html#SECTION00742240000000000000">Kernel <TT>ipc_perm</TT> structure</A> </UL> <LI> <A NAME="tex2html714" HREF="node34.html#SECTION00742300000000000000">SYSTEM CALL: msgget()</A> <LI> <A NAME="tex2html715" HREF="node35.html#SECTION00742400000000000000">SYSTEM CALL: msgsnd()</A> <LI> <A NAME="tex2html716" HREF="node36.html#SECTION00742500000000000000">SYSTEM CALL: msgctl()</A> <LI> <A NAME="tex2html717" HREF="node37.html#SECTION00742600000000000000">msgtool: An interactive message queue manipulator</A> <UL> <LI> <A NAME="tex2html718" HREF="node38.html#SECTION00742610000000000000">Background</A> <LI> <A NAME="tex2html719" HREF="node39.html#SECTION00742620000000000000">Command Line Syntax</A> <UL> <LI> <A NAME="tex2html720" HREF="node40.html#SECTION00742621000000000000">Sending Messages </A> <LI> <A NAME="tex2html721" HREF="node41.html#SECTION00742622000000000000">Retrieving Messages</A> <LI> <A NAME="tex2html722" HREF="node42.html#SECTION00742623000000000000">Changing the Permissions (mode)</A> <LI> <A NAME="tex2html723" HREF="node43.html#SECTION00742624000000000000">Deleting a Queue</A> </UL> <LI> <A NAME="tex2html724" HREF="node44.html#SECTION00742630000000000000">Examples</A> <LI> <A NAME="tex2html725" HREF="node45.html#SECTION00742640000000000000">The Source</A> </UL> </UL> <BR> <HR> <P><ADDRESS> <I>Converted on: <BR> Fri Mar 29 14:43:04 EST 1996</I> </ADDRESS> </BODY> </HTML>