syslog Generate a system log message intsyslog intpriority stringmessage syslog generates a log message that will be distributed by the system logger. priority is a combination of the facility and the level, values for which are given in the next section. The remaining argument is the message to send, except that the two characters %m will be replaced by the error message string (strerror) corresponding to the present value of errno. Constant Description LOG_EMERG system is unusable LOG_ALERT action must be taken immediately LOG_CRIT critical conditions LOG_ERR error conditions LOG_WARNING warning conditions LOG_NOTICE normal, but significant, condition LOG_INFO informational message LOG_DEBUG debug-level message ]]> For information on setting up a user defined log handler, see the syslog.conf 5 Unix manual page. More information on the syslog facilities and option can be found in the man pages for syslog 3 on Unix machines. On Windows NT, the syslog service is emulated using the Event Log. Use of LOG_LOCAL0 through LOG_LOCAL7 for the facility parameter of openlog is not available in Windows. See also define_syslog_variables, openlog and closelog.