78 lines
5.0 KiB
HTML
78 lines
5.0 KiB
HTML
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<meta name="DC.Title" content="Examples: Retrieving a file description to a user space" />
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<meta name="abstract" content="These programming examples show an application that uses a user space as a receiver variable by retrieving a file description to a user space. This approach is possible only if you use an HLL that is able to work with pointers." />
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<title>Examples: Retrieving a file description to a user space</title>
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</head>
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<body id="ExTaskRetfile"><a name="ExTaskRetfile"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Examples: Retrieving a file description to a user space</h1>
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<div><p>These programming examples show an application that uses a user
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space as a receiver variable by retrieving a file description to a user space.
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This approach is possible only if you use an HLL that is able to work with
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pointers.</p>
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<div class="section"><p> The application accepts the following parameters:</p>
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<ul><li>User space name and library</li>
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<li>File name and library</li>
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<li>Record format</li>
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</ul>
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<div class="note"><span class="notetitle">Note:</span> Read the <a href="codedisclaimer.htm">Code license and disclaimer information</a> for important
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legal information.</div>
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<p>The following shows the sequence of steps to retrieve
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a file description to a user space:</p>
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<ol><li>The application creates a user space to store the data in, changes the
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user space to be automatically extendable, and retrieves a pointer to the
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user space.</li>
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<li>The application calls the Retrieve File Description API to retrieve the
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file definition template and uses the user space as the receiver variable.</li>
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</ol>
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<p>This example uses an automatically extended user space as the receiver
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variable on a retrieve API. A user space can return a varying amount of information
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depending on the file description being retrieved. The user space is automatically
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extended up to 16MB to accommodate the information being retrieved.</p>
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</div>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="exretilec.htm">Example in ILE C: Retrieving a file description to a user space</a></strong><br />
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This example uses ILE C to retrieve a file definition template to a user space.</li>
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<li class="ulchildlink"><strong><a href="exretilecobol.htm">Example in ILE COBOL: Retrieving a file description to a user space</a></strong><br />
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This program retrieves a file definition template to a user space.</li>
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<li class="ulchildlink"><strong><a href="exretilerpg.htm">Example in ILE RPG: Retrieving a file description to a user space</a></strong><br />
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This program retrieves a file definition template to a user space.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="ExTaskAPIs.htm" title="This topic provides some examples of using APIs to perform different types of tasks.">Performing tasks using APIs</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="../apis/qdbrtvfd.htm">Retrieve Database File Description (QDBRTVFD)</a></div>
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</div>
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</div>
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</body>
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