Question

How to implement circular logging in linux - c?

Asked by: cosie

Hi all,

I need a simple c sample code how to implement circular logging.
A simple hello word app which writes a simple line to log.txt "Hello world".
If the log file exeeds 1mb, it renames the log to log.txt.0 and ceates a new log.txt.
The tricky part is: the logger can be run in various instances simultaneousley, so it will need some kind of concurrency and wait handling...

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Asked On
2008-03-04 at 07:37:44ID23212895
Tags

C C++

Topics

Linux Programming

,

Miscellaneous Programming

,

Open Source Programming

Participating Experts
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5

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Answers

 

by: michofreihaPosted on 2008-03-04 at 07:42:55ID: 21041961

 

by: michofreihaPosted on 2008-03-04 at 07:44:54ID: 21041983

 

by: cosiePosted on 2008-03-04 at 10:30:36ID: 21043562

using logrotate can be a way in some cases, good idea...
 but I don't want to rely on external settings, config files, etc, I would like to control it from my application...
any other idea?

 

by: duncan_roePosted on 2008-03-05 at 00:49:08ID: 21048678

If you want to do all that stuff (concurrency and wait handling...), you are either going to spend a very long time re-inventing the wheel or you are going to use the  closelog, openlog &, syslog group of functions (man -s 3 syslog). Using the appropriate facilities you can write your own private log files. You can then rotate them with logrotate. Both the syslog function and logrotate will require config files - you will have to live with that.

 

by: cosiePosted on 2008-04-19 at 03:00:21ID: 21391777

I've found the solution myself...
http://pocoproject.org/
This lib contains libraries for circular logging,
Does not depend on other config files...

20120131-EE-VQP-002

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