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Why does grep add /dev/null the first time?
From: |
guido |
Subject: |
Why does grep add /dev/null the first time? |
Date: |
Thu, 14 Aug 2014 11:12:07 -0700 (PDT) |
User-agent: |
G2/1.0 |
The subject is a proxy for a more complex question. I am using Emacs 24.3.1 on
Mac OS X.; however the same issue occurs with Emacs 22.1.1 (which comes with
the OS).
I have this in my .emacs:
(defun ack (arg)
(interactive "sRun ack with arguments: ")
(grep (concat "ack --noheading " arg)))
Note that "ack" is a grep-like tool which I've installed on my $PATH. Its first
argument is a search pattern; optional following arguments are files or
directories, defaulting to the current directory.
I invoke this using ESC-x ack (and then typing a search term).
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?
- Why does grep add /dev/null the first time?,
guido <=