Re: sizeof PIPE_BUF

On Sat, Mar 13, 2010 at 07:28:14AM +0100, Felix von Leitner wrote:
> Thus spake Nikola Vladov ([email protected]):
> > As I understand the situation is the follows.  In 2.6 kernels the size
> > of the pipe is 64K.  This means if the pipe (named or unnamed) is open
> > from two processes one can write max 64K and the other can sleep
> > during this time (not reading).
> 
> > The program I attached last time here show this.  This means that
> > we could find the PIPE_SIZE with an user space program!
> 
> I don't quite understand what you are trying to do that needs to know
> the exact value of PIPE_BUF.  My hunch is that if you need to know the
> exact value, you are doing something you are not supposed to :-)

But what about fpathconf(_PC_PIPE_BUF)?


Johannes