How to limit the size of a log file.

Hi,
I am developing an application that creates a log file with all actions that take place. My problem is that this log file grows a lot because the application acts as a server that is up 24 hours a day. For that reason, I wanted to limit the size of the log file by deleting de older lines, how can implement is?
Thanks.

One way is to periodically (say every week) create a new file to store the actions and then, when the space taken up by all the files is too large, delete the oldest one.
You can also have your application periodically (say the first time you write to the file on any calendar day) check the size of the file and, when it gets too big, copy all of the actions in the file after a given time (presumably there is an associated timestamp with each action) to a new file. Then delete the old file.

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