Patch to fix hang-on-exit bug in OpenSSH-2.9p2

Here is a patch (revised 29Aug01 so that the -T option works correctly) to OpenSSH-2.9p2 to fix the hang-on-exit bug on Linux. To date, no data loss has been reported under Linux with this patch: it does not appear to break ssh or scp, unlike previous related patches. However, data loss has been reported with this patch on HP-UX and OpenBSD, so DO NOT apply it on those systems. Under Linux, this patch

  • fixes the hang-on-exit bug under Protocol 2;
  • waits if there are unterminated X applications;
  • exits the session when all X applications have closed.
  • Of these three tests, Openssh-2.9p2 only passes the second one. Markus Friedl has recently developed this patch to fix the third problem; both it and the exit-delay patch below are already contained in the above hang-on-exit patch for Linux systems.

    You probably should also install this remote-port-forwarding patch to make the -R option work correctly in OpenSSH-2.9p2.

    Patch to add exit delay in OpenSSH-2.9p2

    Here is a patch (revised 29Aug01 so that the -T option works correctly) to add an exit delay to Openssh-2.9p2 for use in tunneling; it allows you to say:

    ssh -n -S 30 -L 110:popserver:110 popserver exit &

    or

    ssh -N -S 30 -L 110:popserver:110 popserver &

    This will wait 30 seconds for the last TCP session on port 110 to close, before exiting the ssh tunneling session. More information is contained in the patch header.


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