<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html lang="en-us" xml:lang="en-us"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="security" content="public" /> <meta name="Robots" content="index,follow" /> <meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' /> <meta name="DC.Type" content="concept" /> <meta name="DC.Title" content="What is i5/OS PASE?" /> <meta name="abstract" content="i5/OS PASE is an integrated runtime environment for AIX applications running on i5/OS." /> <meta name="description" content="i5/OS PASE is an integrated runtime environment for AIX applications running on i5/OS." /> <meta name="DC.Relation" scheme="URI" content="rzalfgetstart.htm" /> <meta name="DC.Relation" scheme="URI" content="rzalfcompileaix.htm" /> <meta name="DC.Relation" scheme="URI" content="../rzalc/pase.htm" /> <meta name="copyright" content="(C) Copyright IBM Corporation 2000, 2006" /> <meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2000, 2006" /> <meta name="DC.Format" content="XHTML" /> <meta name="DC.Identifier" content="rzalfwhatispase" /> <meta name="DC.Language" content="en-us" /> <!-- All rights reserved. Licensed Materials Property of IBM --> <!-- US Government Users Restricted Rights --> <!-- Use, duplication or disclosure restricted by --> <!-- GSA ADP Schedule Contract with IBM Corp. --> <link rel="stylesheet" type="text/css" href="./ibmdita.css" /> <link rel="stylesheet" type="text/css" href="./ic.css" /> <title>What is i5/OS PASE?</title> </head> <body id="rzalfwhatispase"><a name="rzalfwhatispase"><!-- --></a> <!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script> <h1 class="topictitle1">What is <span class="keyword">i5/OS</span> PASE?</h1> <div><p><span class="keyword">i5/OS™</span> PASE is an integrated runtime environment for AIX<sup>®</sup> applications running on <span class="keyword">i5/OS</span>.</p> <p> It supports the application binary interface (ABI) of AIX, and provides a broad subset of the support provided by AIX shared libraries, shells, and utilities. <span class="keyword">i5/OS</span> PASE supports the direct processing of IBM<sup>®</sup> PowerPC<sup>®</sup> machine instructions, so it does not have the drawbacks of an environment that only emulates the machine instructions.</p> <p><span class="keyword">i5/OS</span> PASE applications:</p> <ul><li>Can be written in C, C++, Fortran, or PowerPC assembler</li> <li>Use the same binary executable format as AIX PowerPC applications</li> <li>Run in an <span class="keyword">i5/OS</span> job</li> <li>Use <span class="keyword">i5/OS</span> system functions, such as file systems, security, and sockets </li> </ul> <p>Keep in mind that <span class="keyword">i5/OS</span> PASE is not a UNIX<sup>®</sup> operating system on <span class="keyword">i5/OS</span>. <span class="keyword">i5/OS</span> PASE is designed to run AIX programs on <span class="keyword">i5/OS</span> with little or no change. Programs from any other environment, such as AIX or Linux<sup>®</sup>, need to be written such that they can be compiled on AIX as the first step toward running in <span class="keyword">i5/OS</span> PASE. </p> <p>The <span class="keyword">i5/OS</span> PASE integrated run time runs on the Licensed Internal Code kernel on the iSeries™ server. The system provides integration of many common <span class="keyword">i5/OS</span> functions across <span class="keyword">i5/OS</span> PASE and other runtime environments (including ILE and Java™). <span class="keyword">i5/OS</span> PASE implements a broad subset of AIX system calls. System support for <span class="keyword">i5/OS</span> PASE enforces system security and integrity by controlling what memory an <span class="keyword">i5/OS</span> PASE program can access and restricting it to use only unprivileged machine instructions.</p> <div class="section"><h4 class="sectiontitle">Rapid application deployment with minimal effort</h4><p>In many cases, your AIX programs can run in <span class="keyword">i5/OS</span> PASE with little or no change. The level of AIX programming skills you need varies depending on the design of your AIX program. In addition, by providing additional <span class="keyword">i5/OS</span> application integration in your program design (for instance, with CL commands), you can minimize configuration concerns for your application users.</p> <p><span class="keyword">i5/OS</span> PASE adds another porting option for solution developers who want to share in the success of the <span class="keyword">i5/OS</span> marketplace. By providing a means to cut porting time significantly, <span class="keyword">i5/OS</span> PASE can improve the time to market and return on investment for solutions developers.</p> </div> <div class="section"><h4 class="sectiontitle">A broad subset of AIX technology on <span class="keyword">i5/OS</span></h4><p><span class="keyword">i5/OS</span> PASE implements an application run time that is based on a broad subset of AIX technology, including:</p> <ul><li>Standard C and C++ run time (both threadsafe and non-threadsafe)</li> <li>Fortran run time (both threadsafe and non-threadsafe)</li> <li><tt>pthreads</tt> threading package</li> <li><tt>iconv</tt> services for data conversion</li> <li>Berkeley Software Distributions (BSD) equivalent support</li> <li>X Window System client support with Motif widget set</li> <li>Pseudo terminal (PTY) support</li> </ul> <p>Applications are developed and compiled on an AIX workstation running a level of AIX that is compatible with a level supported by <span class="keyword">i5/OS</span> PASE, and then run on <span class="keyword">i5/OS</span>.</p> <p>Alternatively, you can install one of the supported compiler products in the <span class="keyword">i5/OS</span> PASE environment to develop, compile, build, and run your applications completely within <span class="keyword">i5/OS</span> PASE.</p> <p><span class="keyword">i5/OS</span> PASE also includes the Korn, Bourne, and C shells and nearly 200 utilities that provide a powerful scripting environment.</p> <p><span class="keyword">i5/OS</span> PASE uses IBM investment in a common processor technology for the AIX and <span class="keyword">i5/OS</span> operating systems. The PowerPC processor switches from <span class="keyword">i5/OS</span> mode into AIX mode to run an application in the <span class="keyword">i5/OS</span> PASE run time.</p> <p>Applications running in <span class="keyword">i5/OS</span> PASE are integrated with the <span class="keyword">i5/OS</span> integrated file system and DB2 Universal Database™ for iSeries. They can call (and be called by) Java and Integrated Language Environment<sup>®</sup> (ILE) applications. In general, they can take advantage of all aspects of the <span class="keyword">i5/OS</span> operations environment, such as security, message handling, communication, and backup and recovery. At the same time, they take advantage of application interfaces that are derived from AIX interfaces.</p> </div> </div> <div> <div class="familylinks"> <div class="parentlink"><strong>Parent topic:</strong> <a href="rzalfgetstart.htm" title="i5/OS Portable Application Solutions Environment (i5/OS PASE) enables you to run many of your AIX application binaries on i5/OS with little or no change, and effectively expands your platform solution portfolio.">Get started with i5/OS PASE</a></div> </div> <div class="relref"><strong>Related reference</strong><br /> <div><a href="rzalfcompileaix.htm" title="You can install one of the AIX compiler products that support installation in i5/OS PASE to compile your programs in the i5/OS PASE environment.">Compile your AIX source</a></div> </div> <div class="relinfo"><strong>Related information</strong><br /> <div><a href="../rzalc/pase.htm">i5/OS PASE shells and utilities</a></div> </div> </div> </body> </html>