5.9 Logging

F-Prot Antivirus looks for the environment variable FPROT_LOGLEVEL to determine the amount of information to write to the system logs. The legal FPROT_LOGLEVEL values correspond to the kernel syslog()'s loglevels, and are passed as-is to the system logger.

As with any other system log messages, all of F-Prot log messages marked with lower or equal loglevel then FPROT_LOGLEVEL will be put in the system logs, while messages marked with a higher level are discarded. This applies to all relevant F-Prot components, i.e. those that write to system logs (f-protd, f-prot-qmail, f-prot-milter, f-prot.so)

The default loglevel is 4, which logs all warnings and errors, but the system administrator can increase or decrease the loglevel if he/she so wishes by changing the value of the FPROT_LOGLEVEL environment variable, e.g.:

# Example to make f-protd more verbose. Assumes the bash shell.
root@computer> export FPROT_LOGLEVEL=6
root@computer> /usr/local/f-prot/f-protd -background /usr/local/f-prot

The valid loglevels are listed below:

FPROT_LOGLEVELSemantic name Description
0 LOG_EMERG Fatal condition
1 LOG_ALERT Action must be taken immediately
2 LOG_CRIT Critical conditions
3 LOG_ERR Error conditions
4 LOG_WARNING Warning conditions
5 LOG_NOTICE Normal, but significant, condition
6 LOG_INFO Informational message
7 LOG_DEBUG Debugging information

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