291 lines
7.6 KiB
HTML
291 lines
7.6 KiB
HTML
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
|
|
<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
|
||
|
|
<title>getgrgid_r()--Get Group Information Using Group ID</title>
|
||
|
|
<!-- Begin Header Records ========================================== -->
|
||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
||
|
|
<!-- US Government Users Restricted Rights -->
|
||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
||
|
|
<!-- Change History: -->
|
||
|
|
<!-- file cleaned -->
|
||
|
|
<!-- Unix2 SCRIPT J converted by B2H R4.1 (346) (CMS) by V2KEA304 -->
|
||
|
|
<!-- at RCHVMW2 on 17 Feb 1999 at 11:05:09 -->
|
||
|
|
<!-- This file has undergone html cleanup on 05/14/02 by JET -->
|
||
|
|
<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<!--End Header Records --><!-- Java sync-link -->
|
||
|
|
<script language="Javascript" src="../rzahg/synch.js" type="text/javascript">
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<a name="Top_Of_Page"></a>
|
||
|
|
|
||
|
|
<h2>getgrgid_r()--Get Group Information Using Group ID</h2>
|
||
|
|
|
||
|
|
<div class="box" style="width: 70%;">
|
||
|
|
<br>
|
||
|
|
Syntax<br>
|
||
|
|
|
||
|
|
|
||
|
|
<pre>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <grp.h>
|
||
|
|
|
||
|
|
int getgrgid_r(gid_t <em>gid</em>, struct group <em>*grp</em>,
|
||
|
|
char <em>*buffer</em>, size_t <em>bufsize</em>, struct group
|
||
|
|
<em>**result</em>);
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
Service Program Name: QSYPAPI<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
Default Public Authority: *USE<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
Threadsafe: Yes<br>
|
||
|
|
<!-- iddvc RMBR -->
|
||
|
|
<br>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<p>The <strong>getgrgid_r()</strong> function updates the group structure
|
||
|
|
pointed to by <em>grp</em> and stores a pointer to that structure in the
|
||
|
|
location pointed to by <em>result</em>. The structure contains an entry from
|
||
|
|
the user database with a matching <em>GID</em>.</p>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Parameters</h3>
|
||
|
|
|
||
|
|
<dl>
|
||
|
|
<dt><strong><em>gid</em></strong></dt>
|
||
|
|
|
||
|
|
<dd>(Input) Group ID.<br>
|
||
|
|
</dd>
|
||
|
|
|
||
|
|
<dt><strong><em>grp</em></strong></dt>
|
||
|
|
|
||
|
|
<dd>(Input) A pointer to a group structure.<br>
|
||
|
|
</dd>
|
||
|
|
|
||
|
|
<dt><strong><em>buffer</em></strong></dt>
|
||
|
|
|
||
|
|
<dd>(Input) A pointer to a buffer from which memory is allocated to hold
|
||
|
|
storage areas referenced by the group structure <em>grp</em>.<br>
|
||
|
|
</dd>
|
||
|
|
|
||
|
|
<dt><strong><em>bufsize</em></strong></dt>
|
||
|
|
|
||
|
|
<dd>(Input) The size of <em>buffer</em> in bytes.<br>
|
||
|
|
</dd>
|
||
|
|
|
||
|
|
<dt><strong><em>result</em></strong></dt>
|
||
|
|
|
||
|
|
<dd>(Input) A pointer to a location in which a pointer to the updated group
|
||
|
|
structure is stored. If an error occurs or if the requested entry cannot be
|
||
|
|
found, a NULL pointer is stored in this location.</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
<p>The <samp>struct group</samp>, which is defined in the <strong>
|
||
|
|
grp.h</strong> header file, has the following elements:<br>
|
||
|
|
</p>
|
||
|
|
|
||
|
|
<table border cellpadding="5">
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top" width="10%">char *</td>
|
||
|
|
<td align="left" valign="top" width="10%">gr_name</td>
|
||
|
|
<td align="left" valign="top" width="80%">Name of the group</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top" width="10%">gid_t</td>
|
||
|
|
<td align="left" valign="top" width="10%">gr_gid</td>
|
||
|
|
<td align="left" valign="top" width="80%">Group ID</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top" width="10%">char **</td>
|
||
|
|
<td align="left" valign="top" width="10%">gr_mem</td>
|
||
|
|
<td align="left" valign="top" width="80%">A null-terminated list of pointers to
|
||
|
|
the individual member profile names. If the group profile does not have any
|
||
|
|
members or if the caller does not have *READ authority to the group profile,
|
||
|
|
the list will be empty.</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Authorities</h3>
|
||
|
|
|
||
|
|
<p>*READ authority is required to the user profile associated with the <em>
|
||
|
|
gid</em>. If the user does not have *READ authority, only the name of the group
|
||
|
|
and the group ID values are returned.</p>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Return Value</h3>
|
||
|
|
|
||
|
|
<dl compact>
|
||
|
|
<dt><em>0</em></dt>
|
||
|
|
|
||
|
|
<dd><strong>getgrgid_r</strong> was successful.</dd>
|
||
|
|
|
||
|
|
<dt><em>Any other value</em></dt>
|
||
|
|
|
||
|
|
<dd>Failure: The return value contains an error number indicating the
|
||
|
|
error.</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Error Conditions</h3>
|
||
|
|
|
||
|
|
<p>If <strong>getgrgid_r()</strong> is not successful, the return value usually
|
||
|
|
indicates one of the following errors. Under some conditions, the value could
|
||
|
|
indicate an error other than those listed here.</p>
|
||
|
|
|
||
|
|
<table cellpadding="5">
|
||
|
|
<!-- cols="25 75" -->
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<th align="left" valign="bottom">Error condition</th>
|
||
|
|
<th align="left" valign="bottom">Additional information</th>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EAGAIN">EAGAIN</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<p>The user profile associated with the <em>GID</em> is currently locked by
|
||
|
|
another process.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EC2">EC2</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<p>Detected pointer that is not valid.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#EINVAL">EINVAL</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<p>Value is not valid. Check the job log for messages.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ENOENT">ENOENT</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
The user profile associated with the <em>GID</em> was not found.
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ENOMEM">ENOMEM</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<p>The user profile associated with the <em>GID</em> has exceeded its storage
|
||
|
|
limit.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ENOSPC">ENOSPC</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<p>Machine storage limit exceeded.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
|
||
|
|
<tr>
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<em>[<a href="unix14.htm#ERANGE">ERANGE</a>]</em></td>
|
||
|
|
|
||
|
|
<td align="left" valign="top">
|
||
|
|
<p>Insufficient storage was supplied by <em>buffer</em> and <em>bufsize</em>
|
||
|
|
to contain the data to be referenced by the resulting group structure.</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Related Information</h3>
|
||
|
|
|
||
|
|
<ul>
|
||
|
|
<li>The <<strong>grp.h</strong>> file <a href="unix13.htm">Header Files
|
||
|
|
for UNIX-Type Functions</a>(see )<br>
|
||
|
|
</li>
|
||
|
|
|
||
|
|
<li><a href="getgrgid.htm">getgrgid()</a>--Get Group Information Using Group
|
||
|
|
ID</li>
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
<br>
|
||
|
|
<h3>Example</h3>
|
||
|
|
|
||
|
|
<p>See <a href="../apiref/aboutapis.htm#codedisclaimer">Code disclaimer information</a>
|
||
|
|
for information pertaining to code examples.</p>
|
||
|
|
|
||
|
|
<p>The following example gets the group information for the gid of 91. The
|
||
|
|
group name is GROUP1. There are two group members, CLIFF and PATRICK.</p>
|
||
|
|
|
||
|
|
<pre>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <grp.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <errno.h>
|
||
|
|
|
||
|
|
main()
|
||
|
|
{ short int lp;
|
||
|
|
struct group grp;
|
||
|
|
struct group * grpptr=&grp;
|
||
|
|
struct group * tempGrpPtr;
|
||
|
|
char grpbuffer[200];
|
||
|
|
int grplinelen = sizeof(grpbuffer);
|
||
|
|
|
||
|
|
if ((getgrgid_r(91,grpptr,grpbuffer,grplinelen,&tempGrpPtr))!=0)
|
||
|
|
perror("getgrgid_r() error.");
|
||
|
|
else
|
||
|
|
{
|
||
|
|
printf("\nThe group name is: %s\n", grp.gr_name);
|
||
|
|
printf("The gid is: %u\n", grp.gr_gid);
|
||
|
|
for (lp = 1; NULL != *(grp.gr_mem); lp++, (grp.gr_mem)++)
|
||
|
|
printf("Group Member %d is: %s\n", lp, *(grp.gr_mem));
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<p><strong>Output:</strong></p>
|
||
|
|
|
||
|
|
<pre>
|
||
|
|
The group name is: GROUP1
|
||
|
|
The gid is: 91
|
||
|
|
Group member 1 is: CLIFF
|
||
|
|
Group member 2 is: PATRICK
|
||
|
|
</pre>
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
API introduced: V4R4 <br>
|
||
|
|
<hr>
|
||
|
|
<center>
|
||
|
|
<table cellpadding="2" cellspacing="2">
|
||
|
|
<tr align="center">
|
||
|
|
<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
|
||
|
|
"unix.htm">UNIX-Type APIs</a> | <a href="aplist.htm">APIs by category</a></td>
|
||
|
|
</tr>
|
||
|
|
</table>
|
||
|
|
</center>
|
||
|
|
</body>
|
||
|
|
</html>
|
||
|
|
|