[Bug 43893] New: Disable use of SHM extension through environment variable

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=43893

            Bug ID: 43893
           Summary: Disable use of SHM extension through environment
                    variable
           Product: Wine
           Version: 2.18
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: winex11.drv
          Assignee: wine-bugs at winehq.org
          Reporter: panard at inzenet.org
      Distribution: ---

When using wine through container systems like docker, use of MIT-SHM can
provoke crashes due to some memory isolation, especially on Mac OS X or Windows
(see for instance https://github.com/pauleve/docker-mtgo/issues/3 )

It would be very convenient to be able to disable the use of XShm extension by
setting an environment variable, as Qt and others did (QT_X11_NO_MITSHM).
Something like WINE_11_NO_MITSHM would be awesome.

Let me know if you would agree with such a feature - I can work on the patch.

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