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From: "Bart Schaefer" <schaefer@candle.brasslantern.com>
To: "Andrej Borsenkow" <Andrej.Borsenkow@mow.siemens.ru>,
	"Danny Dulai" <nirva@ishiboo.com>,
	"Zsh Users' List" <zsh-users@sunsite.auc.dk>
Subject: Re: Better ( rm foo; bar > foo ) < foo ?
Date: Thu, 7 Dec 2000 17:10:51 +0000	[thread overview]
Message-ID: <1001207171051.ZM3119@candle.brasslantern.com> (raw)
In-Reply-To: <000501c06058$6ac4e110$21c9ca95@mow.siemens.ru>

On Dec 7,  5:17pm, Andrej Borsenkow wrote:
}
} Process substitutions are executed asynchronously. [...]
} 
} mv =(grep one foo; grep two foo) foo
} 
} second grep most probably will catch wrong file.

The original question wanted stdin redirected from the file, so it could
by definition not be read twice.  In that case =(...) is "safe", except
for the case where the async command fails and the original file is lost
(which is why I suggested "mv -i" a couple of days ago).

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com

Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net   


      reply	other threads:[~2000-12-07 17:29 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2000-12-03 14:01 Hannu Koivisto
2000-12-03 17:48 ` Bart Schaefer
2000-12-03 23:17   ` Hannu Koivisto
2000-12-04  2:27     ` Bart Schaefer
2000-12-03 20:24 ` Clint Adams
2000-12-07 11:44 ` Danny Dulai
2000-12-07 14:17   ` Andrej Borsenkow
2000-12-07 17:10     ` Bart Schaefer [this message]

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