Re: Problem with read() and named pipe (FIFO) (pipe not disk)

[Hossein Mobahi <hmobahi@yahoo.com>]

Sure, the stdio's buffer is limited. However, as you
said, the real-time constraint doesn't let me wait for
the buffer to become full. I need to read it as soon
as the data is written to the buffer. So I really need
to flush stdio's buffer out of that process.

--Hossein

--- joy <gracecott@sancharnet.in> wrote:
> The program cannot buffer data for all eternity and
> must eventually 
> write it to the
> pipe. So, even if read() blocks because  there is no
> data available, it 
> must return as soon as data
> is written. The real-time element will be lost
> though I doubt it will 
> buffer for a long time.
> Is this the behavior you are experiencing and is
> there a problem with this ?
>
> Hossein Mobahi wrote:
> >The solution that I know is using
> >write(STDOUT_FILENO,....) instead of printf because
> it
> >does not buffer. However, I do not have access to
> the
> >source code of prg1, and I must somehow make prg1
> >flush its standard I/O buffer from outside.



		
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