Writing to individual log files

Question

I am trying to write different entries in separate log files from an application. For the reason I'm trying to figure out, all entries are displayed in all log files. What can i do wrong?

I only need critical entries to enter /tmp/log/critical.log and debug entries to enter the /tmp/log/debug.log file, while all enteries can enter the log file / tmp / log / all .log.

Listed below are the entries in /etc/rsyslog.conf

local0.* /tmp/log/all.log local0.alert /tmp/log/alert.log local0.crit /tmp/log/critical.log local0.debug /tmp/log/debug.log local0.emerg /tmp/log/emergency.log local0.err /tmp/log/error.log local0.info /tmp/log/info.log local0.notice /tmp/log/notice.log local0.warning /tmp/log/warning.log 

My sample c writing syslog entries ...

 #include<syslog.h> main() { openlog("myapp",LOG_CONS|LOG_PID|LOG_NDELAY,LOG_LOCAL0); syslog(LOG_EMERG|LOG_LOCAL0,"Emergency",getuid()); syslog(LOG_ALERT|LOG_LOCAL0,"Alert",getuid()); syslog(LOG_CRIT|LOG_LOCAL0,"Critical",getuid()); syslog(LOG_ERR|LOG_LOCAL0,"Error",getuid()); syslog(LOG_WARNING|LOG_LOCAL0,"Warning",getuid()); syslog(LOG_NOTICE|LOG_LOCAL0,"Notice",getuid()); syslog(LOG_INFO|LOG_LOCAL0,"Information",getuid()); syslog(LOG_DEBUG|LOG_LOCAL0,"Debug",getuid()); closelog(); } 

Answer 1

The key point here is that (as you probably guessed) the default log is at the level you select and below. You can change this in the syslog configuration file by changing the selector comparison. The default value, if not specified, >= , you want = :

 local0.* /tmp/log/all.log local0.=alert /tmp/log/alert.log local0.=crit /tmp/log/critical.log local0.=debug /tmp/log/debug.log local0.=emerg /tmp/log/emergency.log local0.=err /tmp/log/error.log local0.=info /tmp/log/info.log local0.=notice /tmp/log/notice.log local0.=warning /tmp/log/warning.log 

Like < , > , <= , >= , you can cancel the comparison using ! .