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1b6521e695
In order to support system compositor instances, it is necessary to allow clients' wl_display_connect() to find the compositor's listening socket somewhere outside of XDG_RUNTIME_DIR. For a full account, see the discussion beginning here: https://lists.freedesktop.org/archives/wayland-devel/2017-November/035664.html This change adjusts the client-side connection logic so that, if WAYLAND_DISPLAY is formatted as an absolute pathname, the socket connection attempt is made to just $WAYLAND_DISPLAY rather than usual user-private location $XDG_RUNTIME_DIR/$WAYLAND_DISPLAY. This change is based on Davide Bettio's submission of the same concept at: https://lists.freedesktop.org/archives/wayland-devel/2015-August/023838.html. v4 changes: * Improved internal comments and some boundary-condition error checks in test case. * Refer to compositor as "Wayland server" rather than "Wayland display" in wl_display_connect() doxygen comments. * Remove redundant descriptions of parameter-interpretation mechanics from wl_display_connect() manpage. Reworked things to make it clear that 'name' and $WAYLAND_DISLAY are each capable of encoding absolute server socket paths. * Remove callout to reference implementation behavior in protocol documented. In its place there is now a simple statement that implementations can optionally support absolute socket paths. v3 changes: * Added test case. * Clarified documentation to note that 'name' parameter to wl_display_connect() can also be an absolute path. v2 changes: * Added backward incompatibility note to wl_display_connect() manpage. * Rephased wl_display_connect() manpage changes to precisely match actual changed behavior. * Added mention of new absolute path behavior in wl_display_connect() doxygen comments. * Mentioned new absolute path interpretation of WAYLAND_DISPLAY in protocol documentation. Signed-off-by: Matt Hoosier <matt.hoosier@gmail.com> Acked-by: Jonas Ådahl <jadahl@gmail.com> Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk> |
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