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Old

How to kill those Zombies

Posted 06-13-2013 at 03:22 PM by rtmistler

When a process has ended, signals are emitted to it's parent to indicate that the process is done. This does not delete the process however, information about the process remains with the system until such time as the parent checks that signal. The process becomes a zombie until the exit signal is checked.

The reason for this is closure.

Rather than have that process go away and never give an understanding as to why it went away, it stays as a zombie so that the parent...
Senior Member
Views 82 Comments 0 rtmistler is offline
Old

Raspberry Pi web server

Posted 06-13-2013 at 02:10 PM by Pyplate

I signed up to LQ a few days ago. I'm going to use this blog to document progress with my various projects.

I'm about a third of the way through writing a CMS in Python. The front end works quite well. It has built-in caching support and some SEO friendly features like meta page descriptions and tags. I've started on the back end, and I have a lot of work to do on it.

I'm hosting a web site on a Raspberry Pi, a small computer with an ARM11 processor running at...
LQ Newbie
Posted in Uncategorized
Views 425 Comments 0 Pyplate is offline
Old

Headcrab, and $NEWJOB

Posted 06-12-2013 at 11:38 PM by ttk (Unpopular Positions: One Geek's Take)

I haven't had time or energy to do much lately, because I started a new job. The first week or so will keep me tired and relatively inactive on my personal projects.

On the other hand, I may be allocating some hours to Headcrab development. Mutt is having a hell of a time with my new employer's IMAPS server. It keeps getting TLS packets with "wrong length" and falling into a craptastic state, requiring me to periodically quit mutt and restart it.

I could...
ttk
Member
Posted in Technology
Views 310 Comments 2 ttk is offline
Old

USB Receive and Rapid Parse, GPS Example

Posted 06-11-2013 at 08:17 AM by rtmistler

Introduction
This is more of a general programming example which can be applied to other systems, in addition to Linux.

This is a discussion of an application programming scenario where a GPS device is attached via a serial USB connection to the system. Challenges faced in this project include:
  • Detecting a USB Serial Resource on your System
  • Configuring and Controlling a USB Serial Resource
  • Processing Receive Data from the USB Serial Resource
  • De-Framing GPS Data
  • Parsing GPS Data
...
Senior Member
Views 190 Comments 0 rtmistler is offline
Old

More simple C and color mixing tests

Posted 06-11-2013 at 12:30 AM by rainbowsally

Today's Feature
  • Here's another pixel (color) mixing toy. The best yet.

Back a couple of blog pages
http://www.linuxquestions.org/questi...lamping-35557/
we were playing with color mixing and data clamping and all kinds of junk including comparing routines to mix colors by a floating point ratio.

This is mixcolors.c - named the same as the other version we were playing with and...
Member
Posted in Uncategorized
Views 406 Comments 0 rainbowsally is offline

  



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