On Sun, 20 Feb 2005 22:36:48 +0100 Denis wrote:
DG> > > To have the snmpd daemon send a trap as soon as
DG> > > messages containing a certain string are written
DG> > > to logfiles.
DG> > > Strings like "error" or "warning" and so on.
DG> >
DG> > Ah. nope, we don't have anything like that. Shouldn't be too
DG> > hard to add, though. Patches welcomed. :-)
DG>
DG> If you were going to attempt it, how would you
DG> go about it? Through perl extensions?
I'm not a perl guru, so I'd stick to C. Start by writing a simple C program to
do the job.
open file
while(!EOF)
read chunk
search for strings
if found, print message
if you use simple IPC, that loop could be a thread running all the time,
blocking when it got to the end of the file, and waiting til more data was
available. when a hit is found, send a message to snmpd to send the trap.
otherwise, you'd have to set it up as an alarm in snmpd to run periodically.
if you don't want to keep the file open, you could store the offset of the last
read to save having to parse the whole file every time.
make sure to handle the case where the log rotates...
--
Robert Story; NET-SNMP Junkie
Support: <http://www.net-snmp.org/> <irc://irc.freenode.net/#net-snmp>
Archive: <http://sourceforge.net/mailarchive/forum.php?forum=net-snmp-users>
You are lost in a twisty maze of little standards, all different.
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