GNU bug report logs - #60722
30.0.50; [PATCH] Using Tramp to sudo in Eshell doesn't change prompt sigil

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From: Ruijie Yu <ruijie <at> netyu.xyz>
To: Jim Porter <jporterbugs <at> gmail.com>
Cc: michael.albinus <at> gmx.de, 60722 <at> debbugs.gnu.org
Subject: bug#60722: 30.0.50; [PATCH] Using Tramp to sudo in Eshell doesn't change prompt sigil
Date: Tue, 10 Jan 2023 20:12:54 -0600

Jim Porter <jporterbugs <at> gmail.com> writes:

> X-Debbugs-Cc: michael.albinus <at> gmx.de
>
> Starting with "sudo emacs -Q -f eshell", notice that the prompt looks like:
>
>   /home/user #
>
> Now start "emacs -Q -f eshell":
>
>   ~ $ cd /sudo::
>   /sudo:root <at> huginn:~ $
>
> Notice that the prompt sigil is still "$" instead of "#". I think it would be
> better to indicate that you have a root shell by using "#" here.
>
> Attached is a patch to do this. It adds a new function, 'user-uid-for-file',
> which is aware of file name handlers. Then, Tramp adds the appropriate
> handler. Now, Eshell can use that function and we get the prompt sigil we
> expect.
>
> [2. text/plain; 0001-Add-user-uid-for-file-to-get-the-effective-UID-for-r.patch]...

Haven't looked into the patch, but I wonder if it addresses multi-hop
scenarios like the following:

1. /sudo:admin <at> localhost|sudo::
2. /sudo:|sudo:another_user <at> localhost::
3. /sshx:admin <at> remote|sudo::
4. /sudo:|sshx:admin <at> remote::
5. /doas::
6. /sshx:root <at> localhost:

Best,


RY

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