• LEAD ARTICLE: TechTip: IFS Containers Part 2, Automation with IBM i Chroot
• FEATURED ARTICLE: RPG Fundamentals Tip #3: Working with Nomain Modules
• NEWS HIGHLIGHT: IBM Digital Analytics Suite Delivers Entitlement to Four Add-On Digital Analytics Services
• ON-DEMAND WEBCAST: Implementing Multiple Layers of Defense
• EVENT: [Webinar series] DevOps for IBM i: On Git, SVN, RTC or TFS
Automation wins in the end. IFS Containers have automation as a first class citizen.
Written by Aaron Bartell
In the first article of this series, I discussed what IFS Containers are and how they use the chroot command to implement the container concept. To create the IFS Container, we had to manually create directories and copy files. That wasn't a big deal for the small example we created, but imagine if you needed to create an IFS Container for an entire PASE application that had requirements for hundreds of directories, commands, and libraries. This is where automation becomes a necessity, and more specifically, the IBM i Chroot open-source project.
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Unlike cycle main and linear main programs, nomain modules have no main procedure.
Written by Bryan Meyers and Jim Buck
Editor’s note: This article is excerpted from Programming in ILE RPG, Fifth Edition, chapter 14, “Building Modular Programs with Procedures.”
The programs previously discussed [cycle main and linear main] are complete programs in themselves. They include a main procedure, along with all the other required subprocedures, coded within one source member, or compile unit. ILE also enhances modular programming concepts by allowing you to code a source member that consists of a segment of a program without a main procedure. The resulting Nomain module contains only subprocedures (one or more) that you can combine with other modules to create a program. By itself, a Nomain module cannot create a program object. One of the modules in a program must have a main procedure.
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