[syslog-ng] Writing line by line in Syslog-ng

[Balazs Scheidler]

On Tue, 2007-08-14 at 12:06 +0530, Diluka Moratuwage wrote:
> Hi,
> 
>     Can I configure the syslog-ng, so that, it writes only line by line. 
> Now few lines at the same time.
> I mean, I wanna, write one line, and then another, not as a a bunch of 
> lines. What I actually need to
> do, is reading one line, process it and do some things, and then listen 
> to next line and so on.
> I highly appreciate if you can provide me information, on how to do this.

I'm not sure I understand what you are trying to achieve here. You have
to handle your incoming connection as a "stream" and perform appropriate
input buffering.

There's nothing that'd ensure that two blocks sent by syslog-ng will be
received as two blocks by your program. This is not how TCP or
SOCK_STREAM sockets work.

Use an input buffer, read in a chunk of bytes and iterate over all
complete lines in your input buffer. If there's only a partial line
left, read again. 

The maximum line length will be limited by the size of your input
buffer.

You might be able to use stdio and its buffering if you want to avoid
implementing input side buffering on your own.

(e.g. fdopen() the socket fd and then use fgets() to read complete
lines)

-- 
Bazsi