Log levels and descriptions


Number Level Description
0 LOG_EMERG Log only those messages in which the system is unusable.
1 LOG_ALERT Log only those messages for which action must be taken immediately.
2 LOG_CRIT Log only those messages that are critical.
3 LOG_ERR Log only those messages that indicate error conditions.
4 LOG_WARNING Log only those messages that are warnings or more serious messages. This is the default level of debug information.
5 LOG_NOTICE Log those messages that indicate normal but significant conditions or warnings and more serious messages.
6 LOG_INFO Log all informational messages and more serious messages.
7 LOG_DEBUG Log all debug-level messages.
8 LOG_TRACE Log all available messages.