[Bug 597] X11 Forwarding: sshd doesn't listen on unix domain sockets

[bugzilla-daemon at mindrot.org]

http://bugzilla.mindrot.org/show_bug.cgi?id=597

           Summary: X11 Forwarding: sshd doesn't listen on unix domain
                    sockets
           Product: Portable OpenSSH
           Version: -current
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: sshd
        AssignedTo: openssh-bugs at mindrot.org
        ReportedBy: ajax at osuny.co.uk


on some operating systems there is a performance benefit to using PF_UNIX
sockets instead of just 127.0.0.1:6010.  sshd should support this if possible.

a simple patch would just add this to channels.c:x11_create_display_inet(), but
i'm not sure that's the Right Thing.  you would want to be able to get both
127.0.0.1:6010 and /tmp/.X11-unix/X10 (incrementing the screen number until you
find a unique one), and then set DISPLAY=:10.0 if you got a unix domain socket.
 and you should probably also be able to configure sshd to not listen to unix
sockets (cygwin, ancient SysV machines, ...).

i'm working on a patch.  anything else i should consider?  i know there are
other "local" X transports on some SysV machines, but i'd have to check the X
source to see how that's done, and i'm not sure it's worth supporting.



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