99 lines
4.6 KiB
HTML
99 lines
4.6 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Example: Enable the worker job to receive a data buffer" />
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<meta name="abstract" content="This example contains the code that enables the worker job to receive a data buffer from the client job and echo it back." />
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<meta name="description" content="This example contains the code that enables the worker job to receive a data buffer from the client job and echo it back." />
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<meta name="DC.Relation" scheme="URI" content="xspawn.htm" />
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<meta name="DC.Relation" scheme="URI" content="xspwnserver.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="spwnwrkr" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Example: Enable the worker job to receive a data buffer</title>
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</head>
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<body id="spwnwrkr"><a name="spwnwrkr"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Example: Enable the worker job to receive a data buffer</h1>
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<div><p>This example contains the code that enables the worker job to receive
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a data buffer from the client job and echo it back.</p>
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<div class="section"><div class="note"><span class="notetitle">Note:</span> By using the code examples, you agree to the terms
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of the <a href="codedisclaimer.htm">Code license and disclaimer information</a>.</div>
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<pre>/**************************************************************************/
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/* Worker job that receives and echoes back a data buffer to a client */
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/**************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/socket.h>
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main (int argc, char *argv[])
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{
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int rc, len;
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int sockfd;
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char buffer[80];
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/*************************************************/
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/* The descriptor for the incoming connection is */
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/* passed to this worker job as a descriptor 0. */
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/*************************************************/
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sockfd = 0;
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/*************************************************/
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/* Receive a message from the client */
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/*************************************************/
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printf("Wait for client to send us a message\n");
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rc = recv(sockfd, buffer, sizeof(buffer), 0);
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if (rc <= 0)
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{
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perror("recv() failed");
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close(sockfd);
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exit(-1);
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}
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printf("<%s>\n", buffer);
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/*************************************************/
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/* Echo the data back to the client */
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/*************************************************/
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printf("Echo it back\n");
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len = rc;
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rc = send(sockfd, buffer, len, 0);
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if (rc <= 0)
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{
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perror("send() failed");
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close(sockfd);
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exit(-1);
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}
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/*************************************************/
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/* Close down the incoming connection */
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/*************************************************/
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close(sockfd);
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}</pre>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="xspawn.htm" title="This example shows how a server program can use the spawn() API to create a child process that inherits the socket descriptor from the parent.">Example: Use the spawn() API to create child processes</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="xspwnserver.htm" title="This example shows how to use the spawn() API to create a child process that inherits the socket descriptor from the parent.">Example: Create a server that uses spawn()</a></div>
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</div>
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</div>
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</body>
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</html>
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