184 lines
5.7 KiB
HTML
184 lines
5.7 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>QlgAccess()--Determine File Accessibility (using NLS-enabled path
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name)</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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<!-- YYMMDD USERID Change description -->
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<!-- Created by Yvonne Griffin for V5R1-->
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<!-- 4/3/01 jkugel: updated for new accessx, QlgAccessx, faccessx APIs -->
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<!-- This file has undergone html cleanup June 2002 by JET -->
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<!-- End Header Records -->
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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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<!-- Java sync-link -->
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<script language="Javascript" src="../rzahg/synch.js" type="text/javascript">
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</script>
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<a name="Top_Of_Page"></a>
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<h2>QlgAccess()--Determine File Accessibility (using NLS-enabled path
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name)</h2>
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<div class="box" style="width: 70%;">
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<br>
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Syntax<br>
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<pre>
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#include <unistd.h>
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int QlgAccess(const Qlg_Path_Name_T <em>*path</em>, int <em>amode</em>);
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</pre>
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Service Program Name: QP0LLIB1<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: Conditional; see Usage Notes for <a href="access.htm">access()</a>.<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The <strong>QlgAccess()</strong> function, like the <strong>
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access()</strong> function, determines whether a file can be accessed in a
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particular manner. The difference is that the <strong>QlgAccess()</strong>
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function takes a pointer to a Qlg_Path_Name_T structure, while <strong>
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access()</strong> takes a pointer to a character string.</p>
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<p>Limited information on the <em>path</em> parameter is provided here. For
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more information on the <em>path</em> parameter and for a discussion of other
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parameters, authorities required, return values, and related information, see
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<a href="access.htm">access()</a>--Determine File Accessibility.</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>path</em></strong></dt>
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<dd>(Input) A pointer to a Qlg_Path_Name_T structure that contains a path name
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or a pointer to a path name for the file to be checked for accessibility. For
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more information on the Qlg_Path_Name_T structure, see <a href="../apiref/pns.htm">Path
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name format</a>.</dd>
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</dl>
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<br>
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<h3>Related Information</h3>
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<ul>
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<li><a href="access.htm">access()</a>--Determine File Accessiblity
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</li>
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<li><a href=
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"accessx.htm">accessx()</a>--Determine File Accessibility for Class of Users
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</li>
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<li><a href=
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"faccessx.htm">faccessx()</a>--Determine File Accessibility for Class of Users
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</li>
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<li><a href=
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"accessxu.htm">QlgAccessx()</a>--Determine File Accessibility for Class of
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Users (using NLS-enabled path name)
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</li>
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<li><a href="chmodu.htm">QlgChmod</a>--Change File Authorizations (using
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NLS-enabled path name)
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</li>
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<li><a href="statu.htm">QlgStat()</a>--Get File Information (using NLS-enabled
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path name)
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</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 determines how a file is accessed:</p>
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<pre>
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#include <stdio.h>
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#include <unistd.h>
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main()
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{
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/****************************************************************/
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/* Defininitons */
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/****************************************************************/
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#define mypath "/"
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const char US_const[3]= "US";
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const char Language_const[4] ="ENU";
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typedef struct pnstruct
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{
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Qlg_Path_Name_T qlg_struct;
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char pn[100]; /* This array size must be >= the */
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/* length of the path name or this must */
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/* be a pointer to the path name. */
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};
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struct pnstruct path;
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/****************************************************************/
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/* Initialize Qlg_Path_Name_T parameters */
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/****************************************************************/
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memset((void*)path name, 0x00, sizeof(struct pnstruct));
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path.qlg_struct.CCSID = 37;
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memcpy(path.qlg_struct.Country_ID,US_const,2);
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memcpy(path.qlg_struct.Language_ID,Language_const,3);
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path.qlg_struct.Path_Type = QLG_CHAR_SINGLE;
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path.qlg_struct.Path_Length = sizeof(mypath)-1;
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path.qlg_struct.Path_Name_Delimiter[0] = '/';
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memcpy(path.pn,mypath,sizeof(mypath)-1);
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if (QlgAccess((Qlg_Path_Name_T *)&path, F_OK) != 0)
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printf("'%s' does not exist!\n", mypath);
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else {
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if (QlgAccess((Qlg_Path_Name_T *)&path, R_OK) == 0)
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printf("You have read access to '%s'\n", mypath);
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if (QlgAccess((Qlg_Path_Name_T *)&path, W_OK) == 0)
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printf("You have write access to '%s'\n", mypath);
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if (QlgAccess((Qlg_Path_Name_T *)&path, X_OK) == 0)
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printf("You have search access to '%s'\n", mypath);
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}
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}
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</pre>
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<p><strong>Output:</strong></p>
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<p>The output from a user with read and execute access is:</p>
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<pre>
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You have read access to '/'
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You have write access to '/'
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You have search access to '/'
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</pre>
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<hr>
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API introduced: V3R1
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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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