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Crashed_Again 04-01-2003 07:41 PM
Silly Question
 
I'm currently logged into my machine using ssh from a remote location. My girlfriend is browsing the internet now on my server. I like to have fun with her and print stuff out and make Linux do all crazy things.

Is there a command I can issue that will display a 'pop-up' message. I know when you do a shutdown command it will pop up occasionaly and say 'The system is going down in 30 minutes' or whatever. Any commands like that?

Tinkster 04-01-2003 07:54 PM
I'm not sure how RH implements this, but
I'd think it's possibly some demon that listens
to wall :)

To be able to pop-up stuff on her screen as
a different user she'd need xhost +localhost
enabled ;) ... then, of course, you could
pester her with anything x-related you want
by setting your DISPLAY=localhost:0.0

Cheers,
Tink

macewan 04-01-2003 07:57 PM
just ssh to the box then
$mozilla
or gaim or whatever

this should start that program on that box.

Crashed_Again 04-01-2003 08:01 PM
I know I can run any X application I want on the server but the question is WHAT application will 'pop-up' with a message of my choosing. I imagine it would be something like:

popup 'Hey what are you doing?' <enter>

but of course it is not that. I guess I could just create a text file with the message I wanted and then open up that text file in an editor. I just thought there might be an application that is specific for this situation.

Tinkster 04-01-2003 08:03 PM
Did you try a
wall?

Cheers,
Tink

MasterC 04-01-2003 08:07 PM
ytalk (?) or just talk are sometimes mentioned, I don't know how well that'd work though since I've never used em ;)

Cool

Crashed_Again 04-01-2003 08:16 PM
Quote:
Originally posted by Tinkster
Did you try a
wall?

Cheers,
Tink
Whats "wall"? Did you mean it like 'I'm going A-WALL!' ?

MasterC I don't have talk installed because I heard it is a very insecure feature to use. Not sure about ytalk but I imagine it is part of the talk package.

hmmm....

Tinkster 04-01-2003 08:26 PM
Quote:
Originally posted by Crashed_Again
Whats "wall"? Did you mean it like 'I'm going A-WALL!' ?
man wall
Code:
WALL(1)                System General Commands Manual                WALL(1)

NAME
    wall - write a message to users

SYNOPSIS
    wall [file]

DESCRIPTION
    Wall displays the contents of file or, by default, its standard input, on
    the terminals of all currently logged in users.

    Only the super-user can write on the terminals of users who have chosen
    to deny messages or are using a program which automatically denies mes-
    sages.

    Reading from a file is refused when the invoker is not superuser and the
    program is suid or sgid.

SEE ALSO
    mesg(1), talk(1), write(1), shutdown(8)


Cheers,
Tink

macewan 04-01-2003 08:28 PM
http://www.deadmule.com/macewan/scre...p/helloworld.c

then

gcc -Wall -g helloworld.c -o hello_world `gtk-config --cflags` \
`gtk-config --libs`

Dave Skywatcher 04-01-2003 10:50 PM
Just write a script in PerlTk, PythonTk, etc. that pops up a box with a string, which comes from an argument you pass to it on the command line. Should be really, really easy if you've used Tk before (I haven't, or I would write it for you).

Crashed_Again 04-04-2003 06:46 AM
OH yeah Tinkster! wall is what I wanted. Something like:

wall "Hey! What are you doing on my computer?"

works great. Thats exactly what I was after. Thanks buddy.

I wonder why it is called 'wall'?

Tinkster 04-04-2003 03:29 PM
Since it's normally just used for administrative
tasks (notice the reference to shutdown in man?)
I assume its short for "warn all" - as in "warn
all users that the box is going down soon!" ;)

Cheers,
Tink

cuckoopint 04-05-2003 01:41 AM
I could've sworn it stood for 'write all', since it displays it to all users.
; )

As for the message, the problem I think is...wall is a console thing. But you were asking for a pup up? In that case you would need to start an xterm (or similar) and then run wall, right?

How about look into xmessage ('man xmessage') which will actually popup a window with a message/program output/etc in it.

Crashed_Again 04-05-2003 02:15 AM
Quote:
Originally posted by cuckoopint
How about look into xmessage ('man xmessage') which will actually popup a window with a message/program output/etc in it.
Oh! I was satisfied with 'wall' but xmessage has a bit more options. Thanks cuckoopint! Its always great to learn new commands.

Tinkster 04-06-2003 12:55 AM
The problem (actually it's a feature, I'd consider
the other behaviour a security hole) that I
(Slackware?) have with xmessage is that it
doesn't work if the user didn't explicitly enable
xdisplays from other than his own actual display
(eg xhost +localhost, xhost + ).

But since both RH and MDK have that little
demon listening for wall per user by default
I thought it'd be a good idea ;)

Cheers,
Tink


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