From: Eli Zaretskii <eliz@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: Why does grep add /dev/null the first time?
Date: Thu, 14 Aug 2014 22:13:09 +0300 [thread overview]
Message-ID: <83tx5ehol6.fsf@gnu.org> (raw)
In-Reply-To: <9c9b05f0-e060-4c00-a393-aaae65f524be@googlegroups.com>
> Date: Thu, 14 Aug 2014 11:12:07 -0700 (PDT)
> From: guido@dropbox.com
>
> The (minor) issue with this is that the first time after starting Emacs (and only the first time) the shell command actually executed has "/dev/null" appended (causing the search to return no results). Any subsequent invocations it will work fine.
>
> What am I missing?
See the doc string of grep-use-null-device, which explains that. Its
default value is 'auto-detect', which causes Emacs to invoke Grep once
for the purposes of detecting how to invoke it thereafter.
prev parent reply other threads:[~2014-08-14 19:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-14 18:12 Why does grep add /dev/null the first time? guido
2014-08-14 19:13 ` Eli Zaretskii [this message]
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