117 lines
4.8 KiB
HTML
117 lines
4.8 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) 2004 by IBM Corporation">
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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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<TITLE>qsh, qsh_inout, qsh_out - Run a QShell command for i5/OS PASE</TITLE>
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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"></SCRIPT>
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<h2>
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qsh, qsh_inout, qsh_out - Run a QShell command for i5/OS PASE
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</h2>
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<p>
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<strong>Syntax</strong>
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</p>
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<pre>
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<strong>qsh</strong> [<var>command-options</var>]
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<strong>qsh_inout</strong> [<var>command-options</var>]
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<strong>qsh_out</strong> [<var>command-options</var>]
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</pre>
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<p>
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<strong>Description</strong>
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</p>
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<p>
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The i5/OS<sup>R</sup> PASE <strong>qsh</strong>,
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<strong>qsh_inout</strong>, and <strong>qsh_out</strong> commands run a QShell command. These
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commands use the i5/OS PASE <strong>system</strong> command to copy i5/OS PASE environment
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variables to the ILE environment and then call the QShell command program through a link in
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directory /usr/bin.
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</p>
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<p>
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The i5/OS PASE <strong>qsh</strong>, <strong>qsh_inout</strong>, and <strong>qsh_out</strong>
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commands all provide the syntax and behavior of the QShell <strong>qsh</strong> command, with
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additional support for ASCII/EBCDIC conversion of standard I/O provided by the i5/OS PASE
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<strong>system</strong> command. Any other command name that links to i5/OS PASE
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<strong>qsh</strong>, <strong>qsh_inout</strong>, or <strong>qsh_out</strong> (in directory
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/QOpenSys/usr/bin) provides the same syntax and behavior as the QShell command in directory
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/usr/bin with the same base name as the link. See the following topics for more information:</p>
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<ul>
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<li>
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<a href="pase_system.htm"><strong>system</strong> - Run a CL Command for i5/OS PASE</a>
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</li>
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<li>
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<a href="../rzahz/qsh.htm"><strong>qsh</strong> - QShell Command Language Interpreter</a>
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(QShell version)
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</li>
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</ul>
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<p>
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The <strong>qsh</strong> and <strong>qsh_inout</strong> commands do ASCII/EBCDIC conversion for
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standard input, standard output, and standard error. The <strong>qsh_out</strong> command only
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does ASCII/EBCDIC conversion for standard output and standard error.
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</p>
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<p>
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You need to set ILE environment variable <strong>QIBM_USE_DESCRIPTOR_STDIO</strong> to Y or I
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(so that i5/OS PASE runtime and ILE C runtime use descriptor standard I/O) to avoid
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unpredicatable results. This is done by default in the i5/OS jobs that program
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<strong>QP2TERM</strong> uses to run i5/OS PASE shells and utilities.
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</p>
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<p>
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See the following topics for related information:
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</p>
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<p>
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<strong>Examples</strong>
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</p>
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<p>
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You should use <strong>qsh_out</strong> (instead of
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<strong>qsh</strong> or <strong>qsh_inout</strong>) when the QShell command does not read from
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standard input to avoid unintended repositioning of the input stream. This example uses
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<strong>qsh_out</strong> to avoid repositioning the stream processed by the
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<strong>read</strong> command, and simply echos the contents of file "myinput" to standard
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output:
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</p>
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<pre>
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while read ; do
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qsh_out -c "echo $REPLY"
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done < myinput
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</pre>
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<p>
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This example uses the QShell <strong>cat</strong> command to convert text in an i5/OS source
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database file to the (ASCII) i5/OS PASE CCSID and store the result in a stream file named
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ascii_sqlcli.h. This takes advantage of support in the QShell utility to insert linend
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characters in the stream that are not added if the i5/OS PASE <strong>cat</strong> command is
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used:
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</p>
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<pre>
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qsh_out -c 'cat /qsys.lib/qsysinc.lib/h.file/sqlcli.mbr' > ascii_sqlcli.h
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</pre>
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<p>
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The system provides an i5/OS PASE <strong>getjobid</strong> command using symbolic link
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/QOpenSys/usr/bin/getjobid -> qsh_out to run the QShell <strong>getjobid</strong> command.
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This example shows two ways to run the QShell utility to determine the name of the i5/OS job
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running the i5/OS PASE shell. The first example is more efficient because it avoids running
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QShell interpreter. Variable $$ is expanded by the i5/OS PASE shell (to the process identifier
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of the shell), and the QShell <strong>getjobid</strong> command writes a line to standard
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output:
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</p>
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<pre>
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getjobid $$
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qsh_out -c "/usr/bin/getjobid $$"
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</pre>
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</body>
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</html>
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