x11-common: set XDG_RUNTIME_DIR if it isn't already set

Wayland needs this set for the communication pipes, so set a fallback in case it
hasn't already been set.

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/recipes-graphics/x11-common/x11-common/etc/X11/Xsession.d/13xdgbasedirs.sh b/meta/recipes-graphics/x11-common/x11-common/etc/X11/Xsession.d/13xdgbasedirs.sh
new file mode 100644 (file)
index 0000000..91594b9
--- /dev/null
+++ b/meta/recipes-graphics/x11-common/x11-common/etc/X11/Xsession.d/13xdgbasedirs.sh
@@ -0,0 +1,13 @@
+# Minimal/stub implementation of the XDG Base Directory specification.
+# http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
+#
+# Wayland needs XDG_RUNTIME_DIR, so set it to /tmp.  This isn't compliant with
+# the specification (wrong mode, wrong owner) but it's mostly sufficient.
+#
+# In the ideal case where SystemD is booting and userspace is initiated by a
+# SystemD user session this will have been set already, so don't overwrite it.
+
+if [ -z "$XGD_RUNTIME_DIR" ]; then
+       XDG_RUNTIME_DIR="/tmp"
+        export XDG_RUNTIME_DIR
+fi