Hi Bazsi,

Sorry for sending something in HTML. My outlook express is configured plain text as email format. I don't know why it still goes out in HTML. Anyway, I resend it again.

----------------------------------------------------------------
Hi Bazsi,

Thanks for your reply first of all!
I've never used strace but I'll try it.
Yes, my program is using buffer and actually that's the first thing I checked. But I'm pretty sure it's not there.

This is somewhat related to pipe openning. If I make sure syslog-ng opens the pipe before my program, then everything is OK. The code in my program is something like this:

        .
        .
initializing
        .
        .
while(1)
{
        open pipe       #block here until syslog-ng open the pipe
        while(1)
        {
                select on the pipe      #block here until the pipe is ready for read or timeout (5 sec)
                next if timeout
                last if other side close the pipe       #jump out the loop and try to open pipe again
               
                read and process the message    #normal
        }
}
               
Bazsi, you see anything wrong here?
Thanks,
Andy                             

-----Original Message-----
From: Balazs Scheidler [mailto:bazsi@balabit.hu]
Sent: Monday, July 15, 2002 10:59 AM
To: syslog-ng@lists.balabit.hu
Subject: Re: [syslog-ng]Strang behaviour of syslog-ng (and my program)

On Mon, Jul 15, 2002 at 10:32:08AM -0400, Antai Ning wrote:
> Hi Gents,
> 
> I'm posting the question again because I really need an answer for it,
> 
> Thanks a lot,
can you check whether strace shows anything insane?
are you using buffering in your perl program?
syslog-ng uses a read/write pipe, and writes messages as soon as the pipe
becomes writable. if the pipe is not writable (as indicated by poll),
messages are buffered in a fifo, whose size is controlled by
log_fifo_size().
--
Bazsi
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