In message <4cffa586.70...@fleetboard.com>,
M Haris Farooque writes:
>I have another question related to Named Pipe.
>I have made a "/usr/local/etc/SEC_Log_Pipe " and hang it with SEC so=20
>that SEC can read input text from it;
>
>*cmd1*: /perl -w /usr/local/sbin/sec.pl --conf=3Dxxx.cfg --conf=3Dyyy.cfg=
>=20
>--conf=3Dzzz.cfg -input=3D/usr/local/etc/SEC_Log_Pipe -intevents/
>
>I need to log some information also in a log file upon successful=20
>execution of one of my defined rule and i wanted to use the same pipe=20
>for writing it.
> [...]
>Is there a good way to handle read/write operations through named pipe?
>Thanks in advance,
The result of using multiple readers on a fifo/named pipe differes
from OS to OS, but IIRC only one process will sucessfully read from
the pipe in most cases. The fifo doesn't duplicate any data. Once the
data is read by a process it is gone.
I would just use two seperate fifo/named pipes.
Also note that writing to a fifo/named pipe can block if there is no
reader so you have to be careful when using the write action to
directly write to a fifo so that it doesn't hang the SEC process.
--
-- rouilj
John Rouillard
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