160 lines
4.7 KiB
HTML
160 lines
4.7 KiB
HTML
<!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>Qp0lUnlink()--Remove Link to File</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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<!-- 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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<!-- Change History: -->
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<!-- 011022 JTROUS Changes from API Review 1, V5R2 -->
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<!-- 0206?? JET This file has undergone html cleanup -->
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<!-- 050422 JTROUS Changes from API Review 1, V5R4 -->
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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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<a name="Top_Of_Page"></a>
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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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<h2>Qp0lUnlink()--Remove Link to File</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 <Qp0lstdi.h>
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int Qp0lUnlink(Qlg_Path_Name_T <em>*path_name</em>);
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</pre>
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<br>
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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 on <a href="open.htm">open()
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API</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>Qp0lUnlink()</strong> function, similar to the <strong>
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unlink()</strong> function, removes a directory entry that refers to a file.
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<strong>Qp0lUnlink()</strong> differs from <strong>unlink()</strong> in that the
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<em>path_name</em> parameter is a pointer to a Qlg_Path_Name_T structure
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instead of a pointer to a character string.</p>
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<p>For a discussion of the authorities required, return values, and related
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information, see <a href="unlink.htm">unlink()--Remove Link to File</a>.</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_Name</em></strong></dt>
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<dd>(Input) The path name of the object to be unlinked. This path name is in
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the Qlg_Path_Name_T format. For more information on this structure, see <a
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href="../apiref/pns.htm">Path 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>The <<strong>unistd.h</strong>> file (see <a href="unix13.htm">Header
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Files for UNIX-Type Functions</a>)
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</li>
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<li><a href="unlink.htm">unlink()</a>--Remove Link to File
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</li>
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<li><a href="link.htm">link()</a>--Create Link to File
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</li>
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<li><a href="open.htm">open()</a>--Open File
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</li>
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<li><a href="close.htm">close()</a>--Close File or Socket Descriptor
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</li>
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<li><a href="rmdir.htm">rmdir()</a>--Remove Directory</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 removes a link to a file: This program was stored in a
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source file with CCSID 37, so the constant string "newfile" will be compiled in
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coded character set identifier (CCSID) 37. Therefore, the country or region and
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language specified are United States English, and the CCSID specified is
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37.</p>
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<pre>
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#include <fcntl.h>
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#include <stdio.h>
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#include <Qp0lstdi.h>
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main() {
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const char US_const[3]= "US";
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const char Language_const[4]="ENU";
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const char Path_Name_Del_const[2] = "/";
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struct pnstruct
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{
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Qlg_Path_Name_T qlg_struct;
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char pn[7];
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};
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struct pnstruct pns;
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struct pnstruct *pns_ptr = NULL;
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char fn[]="unlink.file";
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memset((void*)&pns, 0x00, sizeof(struct pnstruct));
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pns.qlg_struct.CCSID = 37;
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memcpy(pns.qlg_struct.Country_ID,US_const,2);
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memcpy(pns.qlg_struct.Language_ID,Language_const,3);;
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pns.qlg_struct.Path_Type = 0;
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pns.qlg_struct.Path_Length = sizeof(fn)-1;
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memcpy(pns.qlg_struct.Path_Name_Delimiter,
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Path_Name_Del_const,1);
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memcpy(pns.pn,fn,sizeof(fn));
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memset((void *)&Attr_types_ptr, 0x00,
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sizeof(struct attrStruct));
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pns_ptr = &pns;
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if (Qp0lUnlink((Qlg_Path_Name_T *)&pns) != 0)
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perror("Qp0lunlink() error");
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}
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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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