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From: 048321887-0001 AT t-online DOT de (Udo Kuhnt)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Using DR-DOS fork in DJGPP
Date: 30 May 2004 13:12:55 -0700
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

"Eli Zaretskii" <eliz AT gnu DOT org> wrote in message news:<9451-Thu27May2004145923+0300-eliz AT gnu DOT org>...
> > From: 048321887-0001 AT t-online DOT de (Udo Kuhnt)
> > Newsgroups: comp.os.msdos.djgpp
> > Date: 27 May 2004 01:04:46 -0700
> > 
> > I do not think that in Unix, file position is shared between processes.
> 
> They do, for inherited file handles.  An inherited handle doesn't have
> its own entry in the system file tables, it just points to the same
> entry as the original handle in the parent.  So, for such handles,
> moving the file position in one process necessarily moves it in the
> other, as they share the same file position.
> 
> If you think otherwise, please try a simple test program and see for
> yourself.

Sorry, I did not know this. Now I understand why you said that file handles
could not be inherited between VMs. So X_PCreate is perhaps really better
suited for this task than Z_Dom_Fork - that is, if it is at all possible to
use one of these functions to emulate a POSIX fork. :-/