349 lines
8.7 KiB
HTML
349 lines
8.7 KiB
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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>getpwuid_r()--Get User Information for User ID</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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<!-- Unix2 SCRIPT J converted by B2H R4.1 (346) (CMS) by V2KEA304 -->
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<!-- at RCHVMW2 on 17 Feb 1999 at 11:05:09 -->
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<!-- This file has undergone html cleanup May 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 --><!-- 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>getpwuid_r()--Get User Information for User ID</h2>
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<div class="box" style="width: 80%;">
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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 <pwd.h>
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int getpwuid_r(uid_t <em>uid</em>, struct passwd <em>*pwd</em>,
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char <em>*buffer</em>, size_t <em>bufsize</em>, struct passwd
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<em>**result</em>);
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</pre>
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<br>
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Service Program Name: QSYPAPI<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>getpwuid_r()</strong> function updates the <em>passwd</em>
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structure pointed to by <em>pwd</em> and stores a pointer to that structure in
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the location pointed to by <em>result</em>. The structure contains an entry
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from the user database with a matching <em>uid</em>.</p>
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<br>
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<h3>Parameters</h3>
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<dl>
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<dt><strong><em>uid</em></strong></dt>
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<dd>(Input) User ID.<br>
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<br>
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</dd>
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<dt><strong><em>pwd</em></strong></dt>
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<dd>(Input) A pointer to a struct passwd.<br>
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<br>
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</dd>
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<dt><strong><em>buffer</em></strong></dt>
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<dd>(Input) A pointer to a buffer from which memory is allocated to hold
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storage areas referenced by the structure passwd.<br>
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<br>
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</dd>
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<dt><strong><em>bufsize</em></strong></dt>
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<dd>(Input) The size of <em>buffer</em> in bytes.<br>
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<br>
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</dd>
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<dt><strong><em>result</em></strong></dt>
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<dd>(Input) A pointer to a location in which a pointer to the updated passwd
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structure is stored. If an error occurs or if the requested entry cannot be
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found, a NULL pointer is stored in this location.</dd>
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</dl>
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<p>The <samp>struct passwd</samp>, which is defined in the <strong>
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pwd.h</strong> header file, has the following elements:</p>
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<table border>
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<tr>
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<td align="left" valign="top" width="10%">char *</td>
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<td align="left" valign="top" width="15%">pw_name</td>
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<td align="left" valign="top" width="75%">User name</td>
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</tr>
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<tr>
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<td align="left" valign="top">uid_t</td>
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<td align="left" valign="top">pw_uid</td>
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<td align="left" valign="top">User ID</td>
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</tr>
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<tr>
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<td align="left" valign="top">uid_t</td>
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<td align="left" valign="top">pw_gid</td>
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<td align="left" valign="top">Group ID of the user's first group. If the user
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does not have a first group, the GID value will be set to 0.</td>
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</tr>
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<tr>
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<td align="left" valign="top">char *</td>
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<td align="left" valign="top">pw_dir</td>
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<td align="left" valign="top">Initial working directory. If the user does not
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have *READ authority to the user profile, the pw_dir pointer will be set to
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NULL.</td>
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</tr>
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<tr>
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<td align="left" valign="top">char *</td>
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<td align="left" valign="top">pw_shell</td>
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<td align="left" valign="top">Initial user program. If the user does not have
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*READ authority to the user profile, the pw_shell pointer will be set to
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NULL.</td>
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</tr>
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</table>
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<p>See <a href="gtpwuidru.htm">QlgGetpwuid_r()--Get User Information for User
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ID (using NLS-enabled path name)</a> for a description and an example where the
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path name is returned in any CCSID.<br>
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</p>
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<h3>Authorities</h3>
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<p>*READ authority is required to the user profile associated with the <em>
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UID</em>. If the user does not have *READ authority, only the user name, user
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ID, and group ID values are returned.</p>
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<p><strong>Note:</strong> Adopted authority is not used.<br>
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</p>
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<h3>Return Value</h3>
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<dl>
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<dt><em>0</em></dt>
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<dd><strong>getpwuid_r()</strong> was successful.<br>
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<br>
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</dd>
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<dt><em>Any other value</em></dt>
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<dd>Failure: The return value contains an error number indicating the
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error.</dd>
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</dl>
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<br>
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<h3>Error Conditions</h3>
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<p>If <strong>getpwuid_r()</strong> is not successful, the error value usually
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indicates one of the following errors. Under some conditions, the value could
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indicate an error other than those listed here.</p>
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<table cellpadding="5">
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<!-- cols="25 75" -->
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<tr>
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<th align="left" valign="bottom">Error condition</th>
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<th align="left" valign="bottom">Additional information</th>
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</tr>
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<tr>
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<td align="left" valign="top">
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<em>[<a href="unix14.htm#EAGAIN">EAGAIN</a>]</em></td>
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<td align="left" valign="top">
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<p>The user profile associated with the <em>UID</em> is currently locked by
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another process.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top">
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<em>[<a href="unix14.htm#EC2">EC2</a>]</em></td>
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<td align="left" valign="top">
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<p>Detected pointer that is not valid.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top">
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<em>[<a href="unix14.htm#EINVAL">EINVAL</a>]</em></td>
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<td align="left" valign="top">
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<p>Value is not valid. Check the job log for messages.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top">
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<em>[<a href="unix14.htm#ENOENT">ENOENT</a>]</em></td>
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<td align="left" valign="top">
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<p>The user profile associated with the <em>UID</em> was not found.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top">
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<em>[<a href="unix14.htm#ENOMEM">ENOMEM</a>]</em></td>
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<td align="left" valign="top">
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<p>The user profile associated with the <em>UID</em> has exceeded its storage
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limit or is unable to allocate memory.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top">
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<em>[<a href="unix14.htm#ENOSPC">ENOSPC</a>]</em></td>
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<td align="left" valign="top">
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<p>Machine storage limit exceeded.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top">
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<em>[<a href="unix14.htm#ERANGE">ERANGE</a>]</em></td>
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<td align="left" valign="top">
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<p>Insufficient storage was supplied through <em>buffer</em> and <em>
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bufsize</em> to contain the data to be referenced by the resulting group
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structure.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top">
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<em>[<a href="unix14.htm#EUNKNOWN">EUNKNOWN</a>]</em></td>
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<td align="left" valign="top">
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<p>Unknown system state. Check the job log for a CPF9872 message. If there is
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no message, verify that the home directory field in the user profile can be
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displayed.</p>
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</td>
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</tr>
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</table>
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<br>
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<h3>Usage Notes</h3>
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<p>The initial working directory is returned in the CCSID value of the job.</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>pwd.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="getpwuid.htm">getpwuid()</a>--Get User Information for User
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ID</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>The following example gets the user database information for the UID of 22.
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The user name is MYUSER. The GID of MYUSER's first group is 1012. The initial
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directory is /home/MYUSER. The initial user program is *LIBL/QCMD.</p>
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<pre>
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#include <sys/types.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <errno.h>
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main()
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{
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struct passwd pd;
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struct passwd* pwdptr=&pd;
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struct passwd* tempPwdPtr;
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char pwdbuffer[200];
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int pwdlinelen = sizeof(pwdbuffer);
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if ((getpwuid_r(22,pwdptr,pwdbuffer,pwdlinelen,&tempPwdPtr))!=0)
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perror("getpwuid_r() error.");
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else
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{
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printf("\nThe user name is: %s\n", pd.pw_name);
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printf("The user id is: %u\n", pd.pw_uid);
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printf("The group id is: %u\n", pd.pw_gid);
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printf("The initial directory is: %s\n", pd.pw_dir);
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printf("The initial user program is: %s\n", pd.pw_shell);
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}
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}
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</pre>
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<strong>Output:</strong>
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<pre>
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The user name is: MYUSER
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The user ID is: 22
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The group ID is: 1012
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The initial directory is: /home/MYUSER
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The initial user program is: *LIBL/QCMD
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</pre>
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<br>
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<hr>
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API introduced: V4R4
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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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