May 31

Oracle becomes SCO redux

To the surprise of nobody who was actually familiar with the underlying law and precedent, the judge in the Oracle-vs.-Google mega-lawsuit ruled today that Oracle’s claim of copyright protection on the Java APIs is contrary to law.

This means Oracle’s claims against Google are toast. Their best case is now that they’ll get $300K in statutory damages for two technical copyright violations, almost noise compared to what Oracle spent in legal fees. The patent claims went just as thoroughly nowhere as I predicted back when the lawsuit was launched.

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May 23

Beginning of the end for the patent wars?

It’s all over the net today. As I repeatedly predicted, the patent claims in the Oracle-vs.-Java lawsuit over Android have completely fizzled. Oracle’s only shred of hope at this point is that Judge Alsup will rule that APIs can be copyrighted, and given the extent of cluefulness Alsup has displayed (he mentioned in court having done some programming himself) this seems rather unlikely.

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May 17

Announcing coverity-submit

My regular readers will know that (a) I’ve recently been pounding bugs out of GPSD with Coverity, and (b) I hate doing stupid clicky-dances on websites when I think I ought to be able to shove them a programmatically-generated job card that tells them what to do.

So, here’s a side-effect of my recent work with Coverity: coverity-submit. Set up a config file once, and afterwards just run coverity-submit in your project directory and stand back. Supports multiple projects. Because, manularity is evil.

Here’s the HTML documentation.

May 13

Engineering zero-defect software

I’ve been pounding on GPSD with the Coverity static analyzer’s self-build procedure for several days. It is my great pleasure to report that we have just reached zero defect reports in 72.8KLOC. Coverity says this code is clean. And because I think this should be an example unto others, I shall explain how I think others can do likewise.

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May 11

The “Plain Jane” timing GPS is real

The GPS with my magic modification that makes it into a 1ms-accurate time source over USB arrived here last week. And…wow. It works. Not only is it delivering 1PPS where I can see it, it’s the best GPS I’ve ever handled on a couple other axes as well, including superb indoor performance. Despite the fact that it’s been sitting on my desk five feet from a window blocked by large trees, it acquired sat lock in seconds and (judging by the steadily blinking LED) doesn’t appear to have lost it even transiently at any time since.

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May 06

Falling through the cracks: why GPSD sometimes bogarts non-GPS devices

In a recent Google+ comment, H. Peter Anvin grumped about GPSD using “braindead heuristics” to determine which USB devices it should sniff as possible GPses when it gets a hotplug notification saying that one has connected. I was going to reply in a comment there, but the explanation ran too long for that.

Short version: yes, GPSD will very occasionally sniff at a device that is none of its business. We’re stuck in a bad place because of deficiencies in the USB standard, But it doesn’t happen often, and all the alternative behaviors I’ve been able to imagine would be worse in very obvious ways. Detailed explanation follows.

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