[syslog-ng]Thinking about linking

Jay Goldberg jg@open.ch
Tue, 25 Jun 2002 17:06:22 +0200

Hi, syslog-ng'ers

A quick question for all - I've been using syslog-ng, but instead of using
the excellent built-in $YEAR $MONTH and $DAY macros for automatic logfile
rotation, I've been using a different solution -

I use the cronolog program (www.cronolog.org) as a destination for any files
that I want to keep locally.  It's not optimal, but it allows me to do one
thing that keeps our complex management environment intact after the cutover
from syslog to syslog-ng, and that's to maintain a symbolic link to the
latest and previous logfiles in the place where folks/scripts would normally
think to look for them.  So for example:

/reallybigdisk/logs/2002/06/messages.25      and

would be today's and yesterdays 'messages' file.  But with cronolog, I'm able
to specify options so that /var/adm/messages is just a symlink to whatever file
we're logging to now, and /var/adm/messages.0 is a symlink to whatever file
we logged to last:

host# ls -l /var/adm/messages*
lrwxrwxrwx 1 root root 34 Jun 25 01:16 /var/adm/messages -> /reallybigdisk/logs/2002/06/messages.25
lrwxrwxrwx 1 root root 34 Jun 24 01:16 /var/adm/messages.0 -> /reallybigdisk/logs/2002/06/messages.24

I'm not sure if I missed this in the documentation for syslog-ng or perhaps
I'm just insane for thinking that this is useful :)

So I guess my questions after all this are:

	- did I miss this in the documentation?
	- am I insane for wanting such a feature?
	- would it be a lot of trouble to add this feature?

...I was thinking something along the lines of a 'maintain_symlink' option for
a file destination that takes the target of the symlink (e.g., /var/adm/messages)
as an option.

I thought I'd ask first in case anyone's working on this already - it would save
me from hacking at and most likely desecrating the code.  I've had a look through,
and it's a far tidier job than anything I've done in a long time.  But then I haven't
been a C programmer for the last 9 years :(



jay goldberg
senior engineer

open systems ag
raeffelstrasse 29
ch-8045 zurich
t: +41 1 455 74 00
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