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Re: Is there an intra-machine pseudo instant messenger?

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On 2013-03-22, J G Miller <miller@yoyo.ORG> wrote:
> On Friday, March 22nd, 2013, at 04:30:09h +0000, Robert Riches asked:
>
>> Is there a reasonably simple pseudo instant messenger program
>> that would work between multiple users on the same Linux machine,
>> preferably without needing to set up and configure a 'central'
>> server daemon?
>
> You cannot get away from using a central server daemon if you
> want the same user to be able to send the same message to
> multiple parties.
>
> Otherwise ensure that each user has done  mesg y
> and then each user can send a message to another with
> the write command.
>
> NAME
>      write - send a message to another user
>
> SYNOPSIS
>      write user [tty]
>
> Of course root can send a message to all users simultaneously with wall.

While a central server daemon may be the most practical way to do
inter-user communication of this type, there are other methods.
Potential security issues exist for at least some daemon-free
solutions.

Unfortunately, the write program mentioned above seems to require
the utmp (or maybe it's wtmp) database to be maintained.  On my
Mageia 2 system, 'tty' in one xterm shows /dev/pts/0.  From
another xterm, a 'write' command to my username at that tty says
I'm not logged in on that tty.  The finger command says nobody is
logged in, though I have at least three active xterms.

Thanks for the suggestion, though.

-- 
Robert Riches
spamtrap42@jacob21819.net
(Yes, that is one of my email addresses.)

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Is there an intra-machine pseudo instant messenger? Robert Riches <spamtrap42@jacob21819.net> - 2013-03-22 04:30 +0000
  Re: Is there an intra-machine pseudo instant messenger? Keith Keller <kkeller-usenet@wombat.san-francisco.ca.us> - 2013-03-21 21:47 -0700
  Re: Is there an intra-machine pseudo instant messenger? "Chris F.A. Johnson" <cfajohnson@gmail.com> - 2013-03-22 01:08 -0400
  Re: Is there an intra-machine pseudo instant messenger? Eli the Bearded <*@eli.users.panix.com> - 2013-03-22 06:57 +0000
    Re: Is there an intra-machine pseudo instant messenger? Ivan Shmakov <oneingray@gmail.com> - 2013-03-22 17:03 +0000
      Re: Is there an intra-machine pseudo instant messenger? Tim Watts <tw+usenet@dionic.net> - 2013-03-22 20:42 +0000
        Re: Is there an intra-machine pseudo instant messenger? bruce.sinclair@NOSPAMORELSEagresearch.NOTco.NOTnz (Bruce Sinclair) - 2013-03-25 00:13 +0000
          Re: Is there an intra-machine pseudo instant messenger? Tim Watts <tw+usenet@dionic.net> - 2013-03-25 09:07 +0000
            Re: Is there an intra-machine pseudo instant messenger? bruce.sinclair@NOSPAMORELSEagresearch.NOTco.NOTnz (Bruce Sinclair) - 2013-03-26 00:15 +0000
              Re: Is there an intra-machine pseudo instant messenger? The Natural Philosopher <tnp@invalid.invalid> - 2013-03-26 01:39 +0000
                Re: Is there an intra-machine pseudo instant messenger? Tim Watts <tw+usenet@dionic.net> - 2013-03-26 08:04 +0000
                Re: Is there an intra-machine pseudo instant messenger? The Natural Philosopher <tnp@invalid.invalid> - 2013-03-26 13:43 +0000
              Re: Is there an intra-machine pseudo instant messenger? Tim Watts <tw+usenet@dionic.net> - 2013-03-26 08:02 +0000
                Re: Is there an intra-machine pseudo instant messenger? bruce.sinclair@NOSPAMORELSEagresearch.NOTco.NOTnz (Bruce Sinclair) - 2013-03-27 00:17 +0000
  Re: Is there an intra-machine pseudo instant messenger? J G Miller <miller@yoyo.ORG> - 2013-03-22 16:48 +0000
    Re: Is there an intra-machine pseudo instant messenger? John Hasler <jhasler@newsguy.com> - 2013-03-22 12:41 -0500
      Re: Is there an intra-machine pseudo instant messenger? Robert Riches <spamtrap42@jacob21819.net> - 2013-03-23 03:56 +0000
    Re: Is there an intra-machine pseudo instant messenger? Robert Riches <spamtrap42@jacob21819.net> - 2013-03-23 04:04 +0000
      Re: Is there an intra-machine pseudo instant messenger? J G Miller <miller@yoyo.ORG> - 2013-03-23 14:13 +0000

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