GNU bug report logs - #19477
24.4; Init script from su terminal

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: ibeas <at> gmx.com (Álvar Ibeas)
Cc: tracker <at> debbugs.gnu.org
Subject: bug#19477: closed (24.4; Init script from su terminal)
Date: Wed, 31 Dec 2014 19:35:01 +0000

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Your message dated Wed, 31 Dec 2014 20:34:13 +0100
with message-id <87mw638vgq.fsf_-_ <at> gmx.com>
and subject line 24.4; Init script from su terminal
has caused the debbugs.gnu.org bug report #19477,
regarding 24.4; Init script from su terminal
to be marked as done.

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From: ibeas <at> gmx.com (Álvar Ibeas)
To: bug-gnu-emacs <at> gnu.org
Subject: 24.4; Init script from su terminal
Date: Wed, 31 Dec 2014 17:36:58 +0100

Hello,

Working under Debian, when I switch to root using `su', Emacs doesn't
load the init script located in my user's home folder, as the manual
says:

``if you run Emacs from a shell started by `su', Emacs tries to find
your own `.emacs', not that of the user you are currently pretending
to be [...] It gets your user name from the environment variables
`LOGNAME' and `USER'.''

The variables LOGNAME and USER have both the value `root'. The command
`logname' returns instead my own user name.

Is this an Emacs bug?

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From: ibeas <at> gmx.com (Álvar Ibeas)
To: 19477-done <at> debbugs.gnu.org
Subject: 24.4; Init script from su terminal
Date: Wed, 31 Dec 2014 20:34:13 +0100

Glenn Morris <rgm <at> gnu.org> writes:

> Emacs is behaving as documented.
>
> The `su' programs from coreutils (it's since been removed in favour of
> the util-linux one) and util-linux (as used by eg Red Hat) do not change
> LOGNAME or USER when su'ing to root.
>
> It seems that Debian's `su' comes from the `shadow' package and does
> change them.

Thanks for replying. I see now that most of the environment variables
are kept with the `-p' option.

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