select

[Rick C. Petty]

On Thu, Jan 03, 2008 at 08:52:48PM +0200, Metin KAYA wrote:
> 
>   How select(2) will behave if I give the "utimeout" parameter as
>   NULL?

According to the man page:

     If timeout is not a null pointer, it specifies the maximum interval to
     wait for the selection to complete.  System activity can lengthen the
     interval by an indeterminate amount.

     If timeout is a null pointer, the select blocks indefinitely.

     To effect a poll, the timeout argument should not be a null pointer, but
     it should point to a zero-valued timeval structure.


-- Rick C. Petty