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Date Posted: 05:02:54 09/05/08 Fri
Author: Anandan
Subject: Re: How to use Unix syslog in my C/C++ program?
In reply to: prakash 's message, "How to use Unix syslog in my C/C++ program?" on 23:54:46 08/31/08 Sun

If you want to log your information/debug/assertion messages of your C/C++ program, you have to do the following:
1. To log your messages to a file, you have to configure syslog to take the process name of your running program. Your program has to be configured as a user process. syslog is a daemon process that takes its input from "/etc/syslog.conf"

One has to give the level of logging also. For example, if your executable binary program name is 'examplerun'. You might be running the program as ./examplerun. The the process name is 'examplerun'. To get the informational messages of this program, you have to configure in /etc/syslog.conf as given below:

user.info (minimal 2 tab spaces)

Once after above configuration restart syslog using the command:

/etc/init.d/syslog stop ; /etc/init.d/syslog start

2. In your C/C++ program, you should send the log messages
like,
syslog(LOG_NOTICE, "Sum of two integers entered is %d", c);

You may have to include the syslog header file also:
#include

By mentioning user.info in syslog file, we are passing only the informational message mentioned as LOG_NOTICE in our C/C++ program is passed to the log file.

There are some more related to syslog from your application. Please refer the following urls:
http://www.precision-guesswork.com/sage-guide/syslog-overview.html
http://www.linuxjournal.com/article/5476
http://webfuse.cqu.edu.au/Courses/aut2001/85321/Resources/Study_Guide/Chapter_14/

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