On Wed, 14 Aug 2002, Bob Showalter wrote:
> > > >>
> > > >> use POSIX ":sys_wait_h";
> > > >> #...
> > > >> do {
> > > >> $kid = waitpid(-1,&WNOHANG);
> > > >> } until $kid == -1;
> > > >
> > > >
> > Yes WNOHANG makes waitpid return immediately the -1 means wait for any
> > child process. This code will do a non-blocking wait for all child
> > processes.
> >
> > It will be in the do-until loop until all of it's children are dead.
> > perldoc -f waitpid
>
> This example is straight out of perldoc -f waitpid, but if it's
> used "as-is", I don't see the point. Why do a non-blocking wait,
> when the do loop effectively blocks the program anyway. You only
> want non-blocking when you have something else to do.
>
> I would write the above as:
>
> 1 while wait != -1; # wait for all children
>
> Or am I missing something?
I was not following this thread and was not aware exactly what the OP
wanted. Yes this is straight out of perldoc -f waitpid. I just gave
an explanation for what the code in the post does not a suggestion to the
OP's problem. Also I did not post this code, I guess the OP did it
himself and asked for an explanation.
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