106 lines
3.4 KiB
HTML
106 lines
3.4 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<html>
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<head>
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<meta name="generator" content="HTML Tidy, see www.w3.org">
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<meta http-equiv="Content-Type" content=
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"text/html; charset=utf-8">
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<title>Qshell</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 bgcolor="#FFFFFF">
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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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<h1>Qshell</h1>
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<p>Qshell is a command environment based on POSIX and X/Open
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standards. It consists of two parts:</p>
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<ul>
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<li>The shell interpreter (or <strong>qsh</strong>) is a program
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that reads commands from an input source, interprets each command,
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and then runs the command using the services of the operating
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system.</li>
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<li>The utilities (or commands) are external programs that provide
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additional functions and can be quite simple or very complex.</li>
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</ul>
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<p>Together, the shell interpreter and utilities provide a
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powerful, standards-based scripting environment. As you use the new
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programming models offered by i5/OS<SUP>(TM)</SUP>, Qshell provides an extensible
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command environment that allows you to:</p>
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<ul>
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<li>Manage files in any file system supported by the Integrated
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File System.</li>
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<li>Run threaded programs that do thread-safe I/O to and from an
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interactive session.</li>
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<li>Write shell scripts that can be run without modification on
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other systems using a cross-platform command language.</li>
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<li>Write your own utilities to extend the functions provided by
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Qshell.</li>
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</ul>
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<p>This topic provides both new and experienced users with the
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information needed to use Qshell commands and write Qshell scripts.
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</p>
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<p><strong>Note:</strong> By using the code examples, you agree to the terms of the <a href="codedisclaimer.htm">Code license and disclaimer information</a>.</p>
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<blockquote>
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<p><strong><a href="changes.htm">What's New</a></strong><br>
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Select this link to learn about what is new in Qshell this release.
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</p>
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<p><strong><a href="download.htm">Print this topic</a></strong><br>
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Select this link to print a PDF of this topic.
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</p>
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<p><strong><a href="tutorial.htm">Tutorial</a></strong><br>
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Select this link to learn about using the Qshell command language
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and utilities. Start here if you are a new to using shells
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and shell commands.
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</p>
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<p><strong><a href="shell.htm">Command language</a></strong><br>
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Select this link to view the detailed reference information for
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the Qshell command language. Start here if you are writing
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shell scripts or are an experienced user of shells.</p>
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<p><strong><a href="develop.htm">Using Qshell</a></strong><br>
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Select this link to find out how to use the QSH CL command,
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how to configure the Qshell environment, and how to develop
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utilities.</p>
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<p><strong><a href="utility.htm">Utilities</a></strong><br>
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Select this link to view the list of utilities
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provided with Qshell.
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</p>
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<p><strong><a href="apis.htm">Application Programming Interfaces</a></strong><br>
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Select this link to view the list of application programming interfaces
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(APIs) provided with Qshell.
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</p>
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<p><strong><a href="appendix.htm">Remote client examples</a></strong><br>
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Select this link to view an example of a remote client and server
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for starting an interactive Qshell session.
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</p>
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</blockquote>
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<p><strong>Note:</strong> In this information, the terms "job" and "process" are used
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interchangeably. The term "job" is from i5/OS<SUP>(TM)</SUP> and the term
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"process" is from POSIX.</p>
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</body>
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</html>
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