Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #230386

Re: [SOLUTION] Re: Bullseye: setting and using $DISPLAY after su -

Show all headers | View raw

On Wed 06 Jan 2021 at 07:35:08 (-0500), Greg Wooledge wrote:
> On Tue, Jan 05, 2021 at 10:38:39PM -0600, David Wright wrote:
> > But here on debian-user, I was really more interested in why the value
> > of DISPLAY was apparently changed by one su and not the other (or
> > perhaps by both). The explanation, "probably with an alias for su",
> > alias su="su -w DISPLAY", doesn't make any sense to me. Explanations?
> 
> "su" will leave the DISPLAY variable intact, and "su -" will remove it.
> I can see no evidence to the contrary, regardless of whether I'm using
> the ALWAYS_SET_PATH config variable.
> 
> The behavior is simple and consistent for me.

And for me. The only difference from the output you posted is

  $ cat /etc/default/su
  cat: /etc/default/su: No such file or directory
  $ 

but that only affects PATH anyway.

> If someone is seeing DIFFERENT behavior than this, they have yet to
> demonstrate it for us.

I thought the OP already had demonstrated it, in
https://lists.debian.org/debian-user/2021/01/msg00000.html
where we have:

User's DISPLAY   not revealed

After su         DISPLAY=:0.0

(exit)

User's DISPLAY   not revealed

After su -       DISPLAY=:0

As I pointed out, these values will both succeed in pointing to the
same actual display (though I only tested that they both work on my
own display, called ":0"). But they are textually "DIFFERENT", so
they can't both be copied from the user's (unrevealed) value.

So what I sought was an explanation of the OP's transcript, not
that of yours and mine.

Cheers,
David.

Back to linux.debian.user | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Bullseye: setting and using $DISPLAY after su - Charles Curley <charlescurley@charlescurley.com> - 2020-12-31 23:00 +0100
  Re: Bullseye: setting and using $DISPLAY after su - <tomas@tuxteam.de> - 2020-12-31 23:10 +0100
    Re: Bullseye: setting and using $DISPLAY after su - Greg Wooledge <wooledg@eeg.ccf.org> - 2020-12-31 23:20 +0100
      Re: Bullseye: setting and using $DISPLAY after su - Charles Curley <charlescurley@charlescurley.com> - 2021-01-01 01:50 +0100
        Re: Bullseye: setting and using $DISPLAY after su - David Wright <deblis@lionunicorn.co.uk> - 2021-01-01 05:40 +0100
          [SOLUTION] Re: Bullseye: setting and using $DISPLAY after su - Charles Curley <charlescurley@charlescurley.com> - 2021-01-01 18:50 +0100
            Re: [SOLUTION] Re: Bullseye: setting and using $DISPLAY after su - <tomas@tuxteam.de> - 2021-01-01 20:00 +0100
              Re: [SOLUTION] Re: Bullseye: setting and using $DISPLAY after su - Charles Curley <charlescurley@charlescurley.com> - 2021-01-01 22:30 +0100
              Re: [SOLUTION] Re: Bullseye: setting and using $DISPLAY after su - Greg Wooledge <wooledg@eeg.ccf.org> - 2021-01-04 13:40 +0100
                Re: [SOLUTION] Re: Bullseye: setting and using $DISPLAY after su  - The Wanderer <wanderer@fastmail.fm> - 2021-01-04 13:50 +0100
                Re: [SOLUTION] Re: Bullseye: setting and using $DISPLAY after su - Greg Wooledge <wooledg@eeg.ccf.org> - 2021-01-04 14:40 +0100
                Re: [SOLUTION] Re: Bullseye: setting and using $DISPLAY after su - <tomas@tuxteam.de> - 2021-01-04 15:50 +0100
                Re: [SOLUTION] Re: Bullseye: setting and using $DISPLAY after su - David Wright <deblis@lionunicorn.co.uk> - 2021-01-06 05:40 +0100
                Re: [SOLUTION] Re: Bullseye: setting and using $DISPLAY after su - Greg Wooledge <wooledg@eeg.ccf.org> - 2021-01-06 13:40 +0100
                Re: [SOLUTION] Re: Bullseye: setting and using $DISPLAY after su - David Wright <deblis@lionunicorn.co.uk> - 2021-01-06 17:30 +0100
                Re: [SOLUTION] Re: Bullseye: setting and using $DISPLAY after su - Greg Wooledge <wooledg@eeg.ccf.org> - 2021-01-06 19:50 +0100
        Re: Bullseye: setting and using $DISPLAY after su - Greg Wooledge <wooledg@eeg.ccf.org> - 2021-01-04 13:30 +0100
          Re: Bullseye: setting and using $DISPLAY after su - Charles Curley <charlescurley@charlescurley.com> - 2021-01-04 19:20 +0100
      Re: Bullseye: setting and using $DISPLAY after su - <tomas@tuxteam.de> - 2021-01-01 10:20 +0100
    Re: Bullseye: setting and using $DISPLAY after su - Charles Curley <charlescurley@charlescurley.com> - 2021-01-01 02:00 +0100
  Re: Bullseye: setting and using $DISPLAY after su - Mark Neyhart <Mark.Neyhart@akleg.gov> - 2021-01-01 04:10 +0100

csiph-web