Thursday, June 30, 2022

Fix for xfce4-xsettings with upcoming libX11 update

Hi,

I've been preparing various X libraries updates during r2k22. Among
them is an update to libX11 1.8.1, which add an unconditional
XInitThreads() call during libX11 initialisation.

This is causing a (known) regression in xfce4-settings, causing
xfsettingsd to abort.

This adds a patch to fix the issue.

https://gitlab.xfce.org/xfce/xfce4-settings/-/issues/369

PS: xfsettingd is multi-threaded, and I've no way to be sure that only
one thread will do X calls. So it should have been using XInitThreads
from the start.


diff --git a/x11/xfce4/xfce4-settings/Makefile b/x11/xfce4/xfce4-settings/Makefile
index 19532c9036f..28a71cb0eb4 100644
--- a/x11/xfce4/xfce4-settings/Makefile
+++ b/x11/xfce4/xfce4-settings/Makefile
@@ -2,7 +2,7 @@ COMMENT= Xfce4 settings helpers

XFCE_PROJECT= xfce4-settings
XFCE_VERSION= 4.16.2
-REVISION= 2
+REVISION= 3

# GPLv2
PERMIT_PACKAGE= Yes
diff --git a/x11/xfce4/xfce4-settings/patches/patch-xfsettingsd_xsettings_c b/x11/xfce4/xfce4-settings/patches/patch-xfsettingsd_xsettings_c
new file mode 100644
index 00000000000..7a47a5aaf56
--- /dev/null
+++ b/x11/xfce4/xfce4-settings/patches/patch-xfsettingsd_xsettings_c
@@ -0,0 +1,57 @@
+Fix recursive lock in libX11
+
+Index: xfsettingsd/xsettings.c
+--- xfsettingsd/xsettings.c.orig
++++ xfsettingsd/xsettings.c
+@@ -144,6 +144,12 @@ struct _XfceXSettingsScreen
+ gint screen_num;
+ };
+
++struct _XfceTimestamp
++{
++ Window window;
++ Atom atom;
++};
++
+
+
+ G_DEFINE_TYPE (XfceXSettingsHelper, xfce_xsettings_helper, G_TYPE_OBJECT);
+@@ -1033,11 +1039,11 @@ xfce_xsettings_helper_timestamp_predicate (Display *x
+ XEvent *xevent,
+ XPointer arg)
+ {
+- Window window = GPOINTER_TO_UINT (arg);
++ struct _XfceTimestamp *ts = (struct _XfceTimestamp *)arg;
+
+ return (xevent->type == PropertyNotify
+- && xevent->xproperty.window == window
+- && xevent->xproperty.atom == XInternAtom (xdisplay, "_TIMESTAMP_PROP", False));
++ && xevent->xproperty.window == ts->window
++ && xevent->xproperty.atom == ts->atom);
+ }
+
+
+@@ -1046,17 +1052,18 @@ Time
+ xfce_xsettings_get_server_time (Display *xdisplay,
+ Window window)
+ {
+- Atom timestamp_atom;
++ struct _XfceTimestamp *ts = g_malloc(sizeof(struct _XfceTimestamp));
+ guchar c = 'a';
+ XEvent xevent;
+
+ /* get the current xserver timestamp */
+- timestamp_atom = XInternAtom (xdisplay, "_TIMESTAMP_PROP", False);
+- XChangeProperty (xdisplay, window, timestamp_atom, timestamp_atom,
++ ts->atom = XInternAtom (xdisplay, "_TIMESTAMP_PROP", False);
++ ts->window = window;
++ XChangeProperty (xdisplay, window, ts->atom, ts->atom,
+ 8, PropModeReplace, &c, 1);
+ XIfEvent (xdisplay, &xevent, xfce_xsettings_helper_timestamp_predicate,
+- GUINT_TO_POINTER (window));
+-
++ (XPointer)ts);
++ g_free(ts);
+ return xevent.xproperty.time;
+ }
+
--
2.36.1


--
Matthieu Herrb

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