I am part way through design of a logging utility to take the place of logrotate. What this does is read from STDIN and write to a designated log file. Upon startup it gets the size of the log file and tracks writes to that file, once the destination file reaches a certain size it rotates out the file. The benefit of this over logrotate is the file is closed and rotated without without the need to HUP or restart the log generating application.

This utility also has the ability to perform pattern matching using compiled reg-exes to log only certain data or to exclude certain data from the log file. It is configurable via command line or cfg file. Does anyone know of an application which performs these tasks already (I have not found one) or should I continue on with my design?