logrustate

logrotate reimplementation using inotify for event based log rotation

Usage

Simply point logrustate at your logs using the following invocation:

logrustate -f ONE_LOG_FILE -f ANOTHER_LOG_FILE -f AND_ANOTHER -s SIZE_OF_PRESERVED_LOGS -n NUMBER_OF_OLD_LOGS

Two important notes:

• Logs are mmaped to the process's address space and chunks of size SIZE_OF_PRESERVED_LOGS are taken off of the top while the remaining data is pushed to the beginning of the file using fallocate. This absolutely requires O_APPEND opened log files or there will be undefined behavior and potential data loss otherwise. This is usually how logs are opened but make sure you are using this option for your logs files before using this tool.
• Due to limitations in the fallocate syscall, log size must be a multiple of 4096.