Hi there, On Fri, 16 Mar 2007 Bruno Vieira wrote:
... the problem here is that the device that will be logging have memory restrictions. So, I want a log that acts as a fifo. And every time a new message comes, the oldest one gets out. ... I would like to have only one file per destination (ex: auth.log) and keep that file within 100 - 120 KB or 100 lines, per example. I want it to be circular... to be like a FIFO.
Why don't you just log to a remote host?
I have a solution.. but I think there can be a better one. My solution is: having a midlle program between syslog-ng and the destination file. And for every message received, the program would verify if the destination file ( p.e. auth.log) already has 100 lines. If so, deleted the last line, make all others one ENTER down and that append the new line to the beginning of the file.
Don't do it like that. Your 'middle program' might bring the machine to its knees if syslog gets a lot of messages. You could write a script which stores 100 lines in a buffer and deletes the oldest line every time a new line comes in, and make it respond to a signal (for example SIGHUP) by writing its entire buffer to a screen or to a file.
But this seems to be a very "manual" solution...
It is. -- 73, Ged.