GNU bug report logs - #19731
24.4; /dev/null is deleted by tramp-sh.el

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From: Glenn Morris <rgm <at> gnu.org>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: Stefan Monnier <monnier <at> iro.umontreal.ca>, crocket <crockabiscuit <at> gmail.com>, 19731 <at> debbugs.gnu.org
Subject: bug#19731: 24.4; /dev/null is deleted by tramp-sh.el
Date: Mon, 02 Feb 2015 15:08:10 -0500

Michael Albinus wrote:

>> It seems like a plain bug for bash to do what it does
>
> Looks to me like this.

I don't think the bash folks disagree, but as always the question is
what to do about it:

http://lists.gnu.org/archive/html/bug-bash/2015-01/msg00138.html

>> I wonder: what could Tramp do instead of setting HISTFILE to /dev/null?
>> Could unsetting it result in the same behavior (i.e. not save Tramp's
>> commands to any file)?
>
> That's how I understood the doc. Hope somebody will test it.

http://pubs.opengroup.org/onlinepubs/9699919799/utilities/fc.html

says that

   If the HISTFILE variable is not set, the shell may attempt to access
   or create a file .sh_history in the directory referred to by the HOME
   environment variable.

and indeed by experiment with bash 4.2.45, that is exactly what happes
with HISTFILE unset and using "bash --posix".

So (probably) you can't win.

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