openssh bugs - Jun 2009 - [Bug 1610] New: LocalCommand is executed to early

https://bugzilla.mindrot.org/show_bug.cgi?id=1610

           Summary: LocalCommand is executed to early
           Product: Portable OpenSSH
           Version: 5.1p1
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ssh
        AssignedTo: unassigned-bugs at mindrot.org
        ReportedBy: fs-linux_bug at fschueller.eu


If using ssh with "ControlMaster auto" and public key authentication,
the LocalCommand is executed before the control socket is setup. This
results in an endless loop of 'Enter passphrase for key $path/to/key'
questions,
if the LocalCommand is a command that uses ssh (in this case: unison to
automatically sync two folders on every connect).

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |djm at mindrot.org
             Blocks|                            |1626




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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #1698|                            |ok?
               Flag|                            |

--- Comment #1 from Damien Miller <djm at mindrot.org> 2009-10-06 17:01:39
EST ---
Created an attachment (id=1698)
 --> (https://bugzilla.mindrot.org/attachment.cgi?id=1698)
Delay execution of localcommand a tiny bit

Could you please try this patch?

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--- Comment #2 from fs-linux_bug at fschueller.eu 2009-10-15 04:43:05 EST ---
The patch doesn't help, it only changes the problem. One did not get
the "Enter passphrase"-loop now, with this patch unison executes ssh,
but this ssh-client, which uses the master, seems not able to use the
connection and just hangs (I didn't test how whether there's some kind
of timeout if I wait _long_ enough, I killed ssh after 7 minutes)

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--- Comment #3 from Damien Miller <djm at mindrot.org> 2009-10-15 21:21:22
EST ---
Could you enable debugging on both the master and slave ssh commands
and attach the output?

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--- Comment #4 from fs-linux_bug at fschueller.eu 2009-10-19 06:39:31 EST ---
Send via email

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #5 from Damien Miller <djm at mindrot.org> 2009-11-10 14:04:01
EST ---
from email discussion: the reporter was running an interactive program
that expected to have access to the up SSH connection. This is outside
the intended usage of LocalCommand, which was provided to allow one-off
initialisation of tunnels, etc. In particular, ssh(1) execution is
blocked while the LocalCommand is executing, so there is no access to
the SSH connection possible.

I have updated the manpage to explain the constraints better, but the
constraints themselves will not be changing.

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Darren Tucker <dtucker at zip.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

--- Comment #6 from Darren Tucker <dtucker at zip.com.au> 2010-03-26
10:50:57 EST ---
With the release of 5.4p1, this bug is now considered closed.

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