06-08-2010
Depending on the process, it may be possible to send it a HUP to have it reopen it's filehandles.
If that's the case, the steps are relatively simple:
1) move the active file to a different name (process still logging to it)
2) HUP the process (closes current filehandle, opens new one to new file)
3) Then, compress the old file.
Some programs support this - others don't. Some require that the new file be present and have the correct permissions before opening it - others don't, and will create a new file automatically on a HUP.
Best of luck!
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LEARN ABOUT DEBIAN
penlogd
PENLOGD(1) General Commands Manual PENLOGD(1)
NAME
penlogd - consolidate web server logs
SYNOPSIS
penlogd [-fd] [-j dir] [-l logfile] [-n N] [-p pidfile] [-u user] port
EXAMPLE
penlogd -l /var/log/access_log -p /var/run/penlogd.pid 10000
DESCRIPTION
Penlogd receives log entries from Pen and from each of the web servers. It consolidates the entries by replacing the source addresses in
each entry with the "real" client address and writes the result to stdout or to the file given on the command line. This completely
removes the need for postprocessing with mergelogs, since the logs are already merged.
Pen must be instructed to send its log to penlogd. See HOWTO and pen man page for details.
Sending penlogd a HUP signal will make it close and reopen the logfile, unless it is logging to stdout. Rotate the log like this:
mv access_log access_log.1 kill -HUP `cat <pidfile>`
where <pidfile> is the file containing pen's process id.
Sending penlogd a TERM signal will make it close the log file and exit cleanly.
OPTIONS
-d Turn on debugging. The output goes to stderr if we are running in the foreground (see -f) and to syslog (facility user, priority
debug) otherwise.
-f Stay in foreground.
-j dir Run in a chroot environment.
-l logfile
Write output into logfile.
-n N Number of pen log entries to cache (default 1000).
-p pidfile
Write process id into pidfile.
-u user
Run as a different user.
port The UDP port where penlogd receives log entries.
SEE ALSO
pen(1), penlog(1), webresolve(1)
AUTHOR
Copyright (C) 2002-2003 Ulric Eriksson, <ulric@siag.nu>.
LOCAL PENLOGD(1)