Re: [PATCH] fmt-merge-msg: avoid open "-|" list form for Perl 5.6

From: Alex Riesen <raa.lkml@gmail.com>
Date: Feb 21, 2006, 22:04 UTC
Message-ID: <20060221220454.GB5948@steel.home>
In-Reply-To: <20060221205618.GA23920@localdomain>

Eric Wong, Tue, Feb 21, 2006 21:56:18 +0100:

Show 12 quoted lines

> > >  * 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).