From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alex Riesen <raa.lkml@gmail.com>
Subject: Re: [PATCH] fmt-merge-msg: avoid open "-|" list form for Perl 5.6
Date: Tue, 21 Feb 2006 23:04:54 +0100
Message-ID: <20060221220454.GB5948@steel.home>
References: <Pine.LNX.4.63.0602201934270.28957@wbgn013.biozentrum.uni-wuerzburg.de> <20060220191011.GA18085@hand.yhbt.net> <7vr75xbs8w.fsf_-_@assigned-by-dhcp.cox.net> <81b0412b0602210930w5c1a71aage12bad2079dd515a@mail.gmail.com> <20060221205618.GA23920@localdomain>
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To: Eric Wong <normalperson@yhbt.net>
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Eric Wong, Tue, Feb 21, 2006 21:56:18 +0100:
> > >  * Eric, thanks for the hint.  I have this four-patch series.
> > >    Could people with perl 5.6 please check them?
> > 
> > Does not work here (ActiveState Build 811, Perl 5.8.6):
> > 
> > $ perl -e 'open(F, "-|")'
> > '-' is not recognized as an internal or external command,
> > operable program or batch file.
> 
> Both "-|" and "|-" forms of open() use fork() internally.  Iirc, fork()
> doesn't work too well on that platform.
> 

AFAICS, it does not exist. There is emulation of it in that active-perl,
though so this works:

    if ( !fork ) { something }

but not "too well" (you have to be carefule not spawn too many (which
is around 50) processes. Perl'll crash otherwise).