Author Archive for: Alan Seiden

Entries by Alan Seiden

How Current Are Your PTF Groups? Find Out Using SQL

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IBM i continues to deliver SQL interfaces to simplify our work and keep our technology current. Example: We recently needed to test an issue with Apache HTTP Server for i for a support client. IBM Support requested that we check for the latest HTTP PTF Group on our server. (PTF Groups are the names given to logically related fixes, such as those related to HTTP.) To find out if we had the most current group, we used the  SYSTOOLS.GROUP_PTF_CURRENCY SQL view. 

“BOB” for IBM i: Demonstration by Edmund Reinhardt

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At Seiden Group’s September 13, 2024, Code for i Fridays meeting, IBM’s Edmund Reinhardt presented a one-hour tutorial on the Better Object Builder (BOB). This comprehensive demo was given by request. A regular attendee had asked for a complete demonstration, start to finish, of how to use BOB to compile source in VS Code; prepare a make file from scratch; and to use Source Orbit. These tools can help developers who wish to use Git with stream files instead of traditional QSYS-based source members.

Code for IBM i Fridays: A Free Seiden Community Event

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December 2024 Update You’ll find up-to-date information on Code for i Fridays—such as the next meeting date and highlights of past meetings—on this page. The Code for i extension to Visual Studio Code (VS Code) has become ever more popular and powerful. It’s also free and open source. Seiden Group has been hosting online gatherings to share, learn, solve problems, and contribute improvements to Code for i. Hosted by Alan Seiden, the meetings often include guests such as Liam Allan, the originator of Code for i.

Which PHP Versions Get Critical Security Updates?

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Although there are many reasons—including performance—to update to newer PHP releases, the number one reason is to avoid losing security updates. Each version of PHP (7.4, 8.0, 8.1, 8.2, 8.3, etc.) has three years of support before it is considered end of life. For two years, it gets bug fixes and all security fixes. In the third year, it gets only critical security fixes. After that, nothing!

How to Protect Secure Websites & APIs from Certificates Expiring

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If you have encrypted your website, API, Telnet server, or other service with TLS (SSL), good for you! Now, do you know when those certificates will expire? If they expire without renewal, your service could become unavailable without warning. In the past, to find expiration dates for digital certificates on IBM i, you’d either have to look in the Digital Certificate Manager (DCM), call the Retrieve Certificate Information (QYCURTVCI, QycuRetrieveCertificateInfo) API, or keep extremely good notes! CERTIFICATE_INFO, an IBM i service recently delivered by IBM, solves all this. This SQL table function, documented here, returns a result table that contains…

Node.js v20 and Other Updated Packages Require New IBM i Repositories

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As we mentioned in our article on installing ODBC via yum, the latest IBM i open source packages require new repositories. A notable example is Node.js v20. When we hear users say, “I don’t see Node.js v20 listed in available packages, and yum returns ‘No package nodejs20 available‘,” the reason invariably is that the new repositories, ibmi-base and ibmi-release, have not been installed.

What IBM i Users Should Check when Learning of an Open Source Security Vulnerability

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A client asked about a vulnerability found in libwebp, which is used by PHP’s image-handling gd extension. My first step was to find a reputable source for details. According to this trusted article about the vulnerability, the issue affected only libwebp versions 1.3.1 and earlier. I checked our own system and found we had a patched version from IBM, so we were safe. The client was, too. Here is the procedure you can use for checking the version of this or any other open source package on IBM i.

APCu Extension Added to Seiden PHP+

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PHP sites and APIs on IBM i have a new way to run even faster. As noted in our Seiden PHP+ Changelog, we have added the APCu extension to our PHP distribution. The APC User Cache (APCu) extension is an “in-memory key-value store for PHP” that evolved from the old APC extension (minus the opcode caching). We added APCu at the request of a Linux PHP user who migrated their PHP application to the IBM i to simplify their architecture.