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Using PIPES for Interprocess Communications

Posted 06-01-2013 at 05:46 PM by rtmistler

When you look at Linux documentation, there are a variety of ways to communicate across processes. I've tried a few, http://tldp.org/LDP/tlk/ipc/ipc.html, including signals, semaphores, IPC, shared memory, and PIPES.

My Summary of Each IPC Type

Signals
Signals are singular indicators which carry very one-dimensional information. They are fast, and they are supported by system calls where you can send one easily or wait, blocking or non-blocking to see if you've...

rtmistler

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Posted in Linux Application Programming

Views 1282 Comments 0 rtmistler is offline

Creating a daemon to launch and monitor your processes

Posted 05-30-2013 at 01:11 PM by rtmistler
Updated 12-09-2014 at 02:29 PM by rtmistler

Tags daemon(), fork()

Most of my Linux application architectures are really a collection of processes which are started at boot and need be maintained in case something unexpected occurs. Long ago I started with daemons, but also learned and developed a few additional concepts.

The links have changed over the years, but if you search for "linux daemon" and go down some of the search results, you'll find similar entries as:

http://www.netzmafia.de/skripten/uni...mon-howto.html...

rtmistler

Moderator

Posted in Linux Application Programming

Views 5018 Comments 0 rtmistler is offline

Select(2) and why I use it

Posted 05-24-2013 at 01:55 PM by rtmistler
Updated 06-03-2013 at 07:57 AM by rtmistler

Tags file descriptors, select(2), serial receiver

What does select() for me? I mainly use it as a non-blocking call which rapidly checks file descriptors for new information. Based on this, I can continue to perform other computing activities which are in my processes background, but also be ready to grab data from those one or more descriptors as soon as something is available.

The following code has been simplified to cover the main points surround how I use select().

Code:

__attribute__((noreturn))void run_sensor_process(int

...

rtmistler

Moderator

Posted in Linux Application Programming

Views 2176 Comments 0 rtmistler is offline

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