81 lines
3.6 KiB
HTML
81 lines
3.6 KiB
HTML
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>SPAWN CL command, QUSRTOOL example</title>
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<body>
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</script>
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<h2>SPAWN CL command, QUSRTOOL example</h2>
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<p>When you test your threaded application, you may want to quickly spawn new
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processes and debug the programs started in those processes. An example tool
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that creates a <strong>SPAWN</strong> CL command has been placed into the
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<strong>QUSRTOOL</strong> library for your use on the system. (See Creating the
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SPAWN command below.)</p>
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<p>You can install the <strong>QUSRTOOL</strong> library (Option 7) of the base
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operating system when using the <strong>RSTLICPGM</strong> CL command. On the
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<strong>GO</strong> <strong>LICPGM</strong> menu, it appears as the Example
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Tools Library.</p>
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<p>The spawn example shows how you might write a CL command and a command
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processing program to allow you to spawn jobs from the command line. The call
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to <strong>spawn</strong>() starts a new process that allows you to inherit the
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current environment (file descriptors, socket descriptors, and environment
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variables) from the current process. By default, it allows you to create
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threads in the child process and allows you to automatically issue the commands
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required to debug the spawned child. If you want more functionality from the
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command, you can easily edit it.</p>
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<br>
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<h3><a name="286286">Creating the SPAWN command</a></h3>
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<p>To use the example tool to create the SPAWN command, see the <strong>
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QATTINFO</strong> file in the <strong>QUSRTOOL</strong> library. The members
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<strong>AAAAREADME</strong> and <strong>AAAMAP</strong> in that file contain
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information and instructions for unpacking various <strong>QUSRTOOL</strong>
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examples and utilities. Read these members and follow the instructions for
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using the package and unpackage utilities on the <strong>SPAWN</strong> source
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files.</p>
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<p>The member that contains the <strong>SPAWN</strong> example information is
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<strong>TP0ZINFO</strong> in the <strong>QATTINFO</strong> file. The <strong>
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TP0ZINFO</strong> member contains a table that lists the source files that must
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be unpacked to create the <strong>SPAWN</strong> example. The <strong>
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TP0ZINFO</strong> member also contains instructions for creating the example CL
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command and lists which source members are used for <strong>SPAWN</strong> in
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case you want to modify the <strong>SPAWN</strong> CL command to suit your own
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specific needs.</p>
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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="rzah4mst.htm">Pthread APIs</a> | <a
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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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