125 lines
3.3 KiB
HTML
125 lines
3.3 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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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="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>getppid()--Get Process ID of Parent Process</title>
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<!-- Begin Header Records ========================================== -->
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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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<!-- Change History: -->
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<!-- UNIX11 SCRIPT A converted by B2H R4.1 (346) (CMS) by V2DCIJB at -->
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<!-- RCHVMW2 on 1 Jun 1999 at 16:14:12 -->
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<!-- Edited by Kersten Feb 02 -->
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<!-- This file has undergone html cleanup July 2002 by JET -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<!--End Header Records -->
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<!-- Java sync-link -->
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<script type="text/javascript" language="Javascript" src="../rzahg/synch.js">
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</script>
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<a name="Top_Of_Page"></a>
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<h2>getppid()--Get Process ID of Parent Process</h2>
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<div class="box" style="width: 60%;">
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<br>
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Syntax<br>
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<pre>
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#include <sys/types.h>
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#include <unistd.h>
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pid_t getppid(void);
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</pre>
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<br>
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Service Program Name: QP0WSRV1<br>
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<!-- iddvc RMBR -->
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<br>
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Default Public Authority: *USE<br>
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<!-- iddvc RMBR -->
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<br>
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Threadsafe: Yes<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The <strong>getppid()</strong> function returns the parent process ID of the
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calling process.</p>
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<br>
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<h3>Parameters</h3>
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<p>None</p>
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<br>
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<h3>Authorities</h3>
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<p>None.</p>
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<br>
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<h3>Return Value</h3>
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<table cellpadding="5">
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<!-- cols="10 90" -->
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<tr>
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<td align="left" valign="top"><em>pid_t</em></td>
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<td align="left" valign="top">The value returned by <strong>getppid()</strong>
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is the process ID of the parent process for the calling process. A process ID
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value of 1 indicates that there is no parent process associated with the
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calling process.</td>
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</tr>
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</table>
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<br>
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<br>
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<h3>Error Conditions</h3>
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<p>The <strong>getppid()</strong> function is always successful and does not
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return an error.</p>
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<br>
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<h3>Related Information</h3>
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<ul>
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<li>The <<strong>sys/types.h</strong>> file (see <a href=
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"unix13.htm">Header Files for UNIX-Type Functions</a>)<br>
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<br>
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</li>
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<li>The <<strong>unistd.h</strong>> file (see <a href="unix13.htm">Header
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Files for UNIX-Type Functions</a>)<br>
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<br>
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</li>
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<li><a href="qgtppid.htm">Qp0wGetPPid()</a>--Get Process ID of Parent
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Process</li>
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</ul>
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<br>
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<h3>Example</h3>
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<p>See <a href="../apiref/aboutapis.htm#codedisclaimer">Code disclaimer information</a>
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for information pertaining to code examples.</p>
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<p>For an example of using this function, see the child program in
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<a href="../apiref/apiexuspro.htm">Using the Spawn Process and Wait for Child Process APIs</a></p>
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<br>
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<hr>
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API introduced: V3R6
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<hr>
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<center>
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<table cellpadding="2" cellspacing="2">
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<tr align="center">
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<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
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"unix.htm">UNIX-Type APIs</a> | <a href="aplist.htm">APIs by category</a></td>
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</tr>
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</table>
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</center>
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</body>
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</html>
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