select

[Metin KAYA]

> In message: <363446479.20080103213223 at EnderUNIX.org>
>             Metin KAYA <metin at EnderUNIX.org> writes:
> :    Yes Rick, I'm asking this "indefinitely" issue. Is there anything
> :    that handle this NULL situation a signal, or etc.? How does Linux or
> :    FreeBSD behave?
> : 
: >> 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.
> : 

> Indefinitely means "it won't return until there's an error or data"

> Warner

Thanks a lot Warner. It's a good explanation.

--                          
Metin KAYA                  
EnderUNIX Software Developer          Endersys Software Engineer
http://www.EnderUNIX.org/metin        http://www.Endersys.com/