As400: Ibm System I, As400 Control Language, As400 Object, Lpar, As400 Library, Ibm I, Dynamic Logical Partitioning, Single-Level Store Books LLC

ISBN: 9781155609607

Published: May 5th 2010

Paperback

54 pages


Description

As400: Ibm System I, As400 Control Language, As400 Object, Lpar, As400 Library, Ibm I, Dynamic Logical Partitioning, Single-Level Store  by  Books LLC

As400: Ibm System I, As400 Control Language, As400 Object, Lpar, As400 Library, Ibm I, Dynamic Logical Partitioning, Single-Level Store by Books LLC
May 5th 2010 | Paperback | PDF, EPUB, FB2, DjVu, audiobook, mp3, ZIP | 54 pages | ISBN: 9781155609607 | 9.64 Mb

Purchase includes free access to book updates online and a free trial membership in the publishers book club where you can select from more than a million books without charge. Chapters: Ibm System I, As/400 Control Language, As/400 Object, Lpar,MorePurchase includes free access to book updates online and a free trial membership in the publishers book club where you can select from more than a million books without charge. Chapters: Ibm System I, As/400 Control Language, As/400 Object, Lpar, As/400 Library, Ibm I, Dynamic Logical Partitioning, Single-Level Store, As/400 Library List, Ibm Power Systems, Auxiliary Storage Pool, Programming Development Manager, Pr/sm.

Excerpt: Paradigm: imperative The AS/400 Control Language (CL) is a scripting language for the IBM AS/400 midrange platform bearing a resemblance to the IBM Job Control Language and consisting of an ever expanding set of command objects (*CMD) used to invoke traditional AS/400 programs and/or get help on what those programs do.

CL can also be used to create CL programs (congruent to shell scripts ) where there are additional commands that provide program-like functionality (GOTO, IF/ELSE, variable declaration, file input, etc.) The vast majority of AS/400 commands were written by IBM developers to perform system level tasks like compiling programs, backing up data, changing system configurations, displaying system object details, or deleting them.

Commands are not limited to systems level concerns and can be drafted for user applications as well. Commands and programs Parameters (command-line arguments ) defined in the main procedures of all traditional AS/400 programs are hard coded lists that are made up of parameters that can be numeric, alphanumeric, boolean, etc and the order in which parameters are passed is important.

This is a stark difference from the Unix and DOS worlds where the parameter list in Unix shell scripts and C programs is a set or array of character pointers and more often than not the parameters are not positionally dependent. The AS/400 developers solution to this problem was the command object (*CMD). While the parameters on the command can be specified in any order, each parameter is defined to be passed in a specifi...



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