Roland,

Just to follow up with one more data point.

> I did some more investigaton and testing:
> 
> -- Tru64 5.1 behaves like Solaris 8 -- si_pid == 0 for
>    the WNOHANG with no children case.
> 
> -- HP-UX 11 is different -- not even POSIX compliant.  It
>    returns -1 with ECHILD in this scenario.  
> 
> -- According to the man pages, waitid() is also present on
>    Irix 6.5 and UnixWare 7, but I don't have access to 
>    those systems to run a test (my earlier test program
>    would be sufficient to test on those systems).
> 
> So, discounting the non-compliant HP-UX, on other 
> implementations we have 2 out of 2 for the "si_pid == 0"
> behavior.  (I will see if I can get access to other
> systems for further testing.)  So, how about 
> reconsidering the approach for Linux?

Someone has supplied with me with a data point for Irix 6.5 
(and 6.2).  Irix behaves like Solaris 8.  So that's 3 out 
of 3 for the "si_pid == 0" behavior (plus a buggy HP-UX 11).
I will try to get a Unixware data point, but that will 
probably take several days.  (I wonder if anyone can supply 
an AIX data point?)

Cheers,

Michael

Cheers,

Michael

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