How to empty a logfile

[yoogie]

Hi there.

I have the following setup: Captiveportal, transparent squid and of course pfSense V.1.1.0

I have a small perlscript running on that pfSense which is executed once a day through ssh2. What it does: It prints out the squid-log, the portalauthd.log and the dhcpd.log and should wipe the logfiles by simply doing the following:

if (open (OUT, ">/var/log/dhcpd.log")) {
   close OUT;
}

This ensures a clean and blank logfile without a change in the inode or filehandles.

This works very well for the squid-logfile, but the dhcpd.log and portalauthd.log files seem to be binary blasted until 65.535 Bytes. Doing the described procedure on those files ends up in a Segmentation fault.

So, is there a command I can execute to empty those files or how can I achieve that those files get initialized?

Other question. Is there a sort of logfile rotation? Is it possible to run out of disk space?

Many thanks in advance.

CHeers,
Manuel

[yoogie]

Hi there, I have found the command.

/usr/sbin/clog -i -s 262144 /var/log/dhcpd.log

Am I right that the logfile is like a FILO buffer of a fixed size?
How can I turn this off?

Cheers,
Manuel

[sullrich]

Yes its a fixed size (clog).  It cannot be turned off.

[yoogie]

Ok, thanks.

Cheers,
Manuel