How create multiples ssh on same host without asking same password

[Eric LeBlanc]

On Thu, 1 Jul 2004, Damien Miller wrote:
> Eric LeBlanc wrote:
> > Hello,
> >
> > I used the SecureShell windows client from ssh.com and it have a cool
> > feature:  Once I logged on a server with ssh, I was able to create more
> > terminals without being asked for a password again.  It seems that it use
> > the 'same channel' created from the first ssh client.
> >
> > So, it's possible with openssh on linux/bsd?  If yes, how? If not, can you
> > add this feature?
>
> Already done - see ControlMaster in the ssh_config manpage of the
> current CVS version.
>
> This will be in the next release.
>
> -d
>

Hello,

Thank you, it works very well, but I think that the man page need
more details about it.

For example, it's not pratical (if I understand well) to set the
ControlPath and ControlMaster directly on ssh_config.  The problem is when
I setup like this:

ControlMaster=yes
ControlPath=/wathever/you/want

Every time I start SSH, it's alway considered as master, so ssh will ask
the password.  They 'better' way is:

ssh -M -S /path/to/control/file username at host.domain

and for next sessions using the same channel:

ssh -S /path/to/control/file username at host.domain

I've created a mini script that does the 'dirty' job:

---- cut -------------------------------------------
SOCKET=/tmp/BLAH
SSH=/usr/local/bin/ssh

if [ ! -S ${SOCKET} ]
then
  ${SSH} -M -S ${SOCKET} myserver.domain
else
  ${SSH} -S ${SOCKET} myserver.domain
fi
---- cut -------------------------------------------

Am I wrong?

Or, the flag to disable the Master in ssh command is there but missing in
the man page?  I know that it is the default (No master), but when it
configured in ssh_config, it will be always considered as master.

Or else, it currently in devel and it's not finished and I must wait
before talking about it?

Finally, a little note: when I specify the flag -S, I know that I don't
need to specify the server, but SSH will return an error.  So, if it not
corrected, well, I will send to you this little patch:

----------------------------------- CUT ----------------------------------
--- ssh_bak.c   2004-07-01 09:33:20.000000000 -0400
+++ ssh.c       2004-07-01 09:37:45.000000000 -0400
@@ -485,7 +485,7 @@
        }

        /* Check that we got a host name. */
-       if (!host)
+       if ( (!host) && (strlen(options.control_path) != 0) &&
(options.control_master != -1) )
                usage();

        SSLeay_add_all_algorithms();
---------------------------------- CUT ------------------------------------

E.
--
Eric LeBlanc
inouk at igt.net
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