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From: Raffaele Ricciardi <rfflrccrd@gmail.com>
Newsgroups: gmane.emacs.help
Subject: Re: Examining the output of a shell command?
Date: Sun, 28 Jun 2015 17:51:10 +0200
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On 28/06/15 17:43, Eli Zaretskii wrote:
>> Another puzzling behaviour:
>>
>>      $ echo $RED
>>      \[\e[1;31m
>>      $ emacs -nw -Q
>>      M-: (getenv "RED") RET
>>      --> nil
>
> Did you "export RED"?

This.  I didn't.

> Anyway, what I wanted to point out was that when you invoke the shell
> from Emacs, it is a non-interactive session, which might get different
> settings.

Right.  I will look into it.