openssh bugs - Nov 2005 - [Bug 1118] Annoying "Killed by signal 1" message with ProxyCommand

http://bugzilla.mindrot.org/show_bug.cgi?id=1118

           Summary: Annoying "Killed by signal 1" message with
ProxyCommand
           Product: Portable OpenSSH
           Version: 4.2p1
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ssh
        AssignedTo: bitbucket at mindrot.org
        ReportedBy: koef at xs4all.nl


(Copied from Debian bug #313371)

When using nc or socat to bounce connections to an ssh server via an
intermediary, "Killed by signal 1." is printed when I log out.
Signal 1 is SIGHUP.  This does not happen with OpenSSH 3.9 or earlier.

Example commands:

        ssh -o 'ProxyCommand ssh localhost socat - TCP4:%h:%p' localhost

        ssh -o 'ProxyCommand ssh localhost nc %h %p' localhost

The first 'localhost' is normally the intermediary host.

Reproduced on: Linux 2.6.14, FreeBSD 6.0, Solaris 8




------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

http://bugzilla.mindrot.org/show_bug.cgi?id=1118


koef at xs4all.nl changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |koef at xs4all.nl






------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.

http://bugzilla.mindrot.org/show_bug.cgi?id=1118





------- Comment #1 from dtucker at zip.com.au  2005-11-21 08:57 -------
Well, the sighup is from this line in ssh.c:

        if (proxy_command_pid > 1)
                kill(proxy_command_pid, SIGHUP);

but without that, some proxycommands will hang around indefinitely.

The easy way to prevent it is to use "ssh -q foo bar" as the
proxycommand.




------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.