Re: Finding simpler better sudo for Emacs

[Jean Louis]

* Michael Albinus <michael.albinus@gmx.de> [2021-03-30 13:35]:
> Jean Louis <bugs@gnu.support> writes:
> 
> Hi Jean,
> 
> > (defun sudo (&rest arguments)
> >   "Executes list ARGUMENTS with system command `sudo'."
> >   (let ((default-directory
> >       (concat "/sudo::" (file-local-name default-directory))))
> >     (shell-command-to-string (string-join arguments " "))))
> >
> > (sudo "ls") → " 0install-ea1f1e-download
> >  847cf980479cf1dd15482464efa8620ca98c1c93c5a3ac1e2a1dd24918b9cd46.html
> >  adb.1001.log" ;; are files from my tmp
> >
> > but then if I change to dired buffer ~/tmp and do: M-: -- (sudo "ls")
> > I get following error:
> >
> > "sh: cd: /root/tmp/: No such file or directory
> 
> OK, so let's do
> 
(defun sudo (&rest arguments)
  "Executes list ARGUMENTS with system command `sudo'."
  (let ((default-directory
          (concat "/sudo::" (file-local-name (expand-file-name 
default-directory)))))
    (shell-command-to-string (string-join arguments " "))))

(sudo "ls") → " 0install-ea1f1e-download
 847cf980479cf1dd15482464efa8620ca98c1c93c5a3ac1e2a1dd24918b9cd46.html
 adb.1001.log
 ..."

(sudo "ls") → " 0install-ea1f1e-download
 847cf980479cf1dd15482464efa8620ca98c1c93c5a3ac1e2a1dd24918b9cd46.html
 adb.1001.log
 ..."

That one works well. I will keep it.

On the other hand, now I have got concern for this command:

(defun sudo (arguments)
  "Executes list ARGUMENTS with system command `sudo'."
  (let* ((command (format "sudo su -c -- root -c \"%s\"" (string-join (list 
arguments))))
         (return (shell-command-to-string command)))
    return))

As I would not like, definitely I would not like executing my sudo
commands on remote servers which I use so often with the above sudo
command.

So I would like to make sure I am on the local file system, as if I am
on /sudo:: file system or /ssh: or similar, that is not something I
would like. I have multiple notebooks which I access, imagine I change
default directory to some remote one and I am not visible in the
buffer of Dired. This happens sometimes. Then I wish to execute fan
control, but it would run on remote computer.

How to check if default directory is on local file system?

 
-- 
Jean

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