wemeet: fix Wayland crash caused by XSetInputFocus (#459399)

pkgs/by-name/we/wemeet/package.nix

@@ -126,6 +126,47 @@ let
 
     meta.license = lib.licenses.unfree;
   };
+
+  # Fix for Wayland crash when XSetInputFocus is called
+  wemeet-x11-fix = stdenv.mkDerivation {
+    pname = "wemeet-x11-fix";
+    version = "0-unstable-2025-11-07";
+
+    src = ./wemeet-x11-fix.c;
+
+    dontUnpack = true;
+    dontWrapQtApps = true;
+
+    nativeBuildInputs = [ pkg-config ];
+
+    buildInputs = [
+      xorg.libX11
+    ];
+
+    buildPhase = ''
+      runHook preBuild
+
+      $CC $CFLAGS -Wall -Wextra -fPIC -shared \
+        -o libwemeet-x11-fix.so $src \
+        -ldl -lX11
+
+      runHook postBuild
+    '';
+
+    installPhase = ''
+      runHook preInstall
+
+      install -Dm755 ./libwemeet-x11-fix.so $out/lib/libwemeet-x11-fix.so
+
+      runHook postInstall
+    '';
+
+    meta = {
+      description = "Fix for wemeet Wayland XSetInputFocus crash";
+      license = lib.licenses.mit;
+    };
+  };
+
   selectSystem =
     attrs:
     attrs.${stdenv.hostPlatform.system}
@@ -237,7 +278,7 @@ stdenv.mkDerivation {
         "--prefix QT_PLUGIN_PATH : $out/app/wemeet/plugins"
       ];
       commonWrapperArgs = baseWrapperArgs ++ [
-        "--prefix LD_PRELOAD : ${libwemeetwrap}/lib/libwemeetwrap.so"
+        "--prefix LD_PRELOAD : ${libwemeetwrap}/lib/libwemeetwrap.so:${wemeet-x11-fix}/lib/libwemeet-x11-fix.so"
         "--run 'if [[ $XDG_SESSION_TYPE == \"wayland\" ]]; then export LD_PRELOAD=${wemeet-wayland-screenshare}/lib/wemeet/libhook.so\${LD_PRELOAD:+:$LD_PRELOAD}; fi'"
       ];
       xwaylandWrapperArgs = baseWrapperArgs ++ [

pkgs/by-name/we/wemeet/wemeet-x11-fix.c

@@ -0,0 +1,54 @@
+/*
+ * wemeet-x11-fix.c
+ *
+ * This library intercepts X11 functions that cause crashes in Wayland mode.
+ * Specifically, it prevents XSetInputFocus from crashing when called in
+ * pure Wayland environment.
+ *
+ * Compile: gcc -shared -fPIC -o libwemeet-x11-fix.so wemeet-x11-fix.c -ldl
+ * Usage: LD_PRELOAD=./libwemeet-x11-fix.so wemeet
+ */
+
+#define _GNU_SOURCE
+#include <dlfcn.h>
+#include <X11/Xlib.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// Original XSetInputFocus function pointer
+static int (*orig_XSetInputFocus)(Display*, Window, int, Time) = NULL;
+
+// Hooked XSetInputFocus that safely handles Wayland environment
+int XSetInputFocus(Display *display, Window focus, int revert_to, Time time) {
+    // Check if we're in a Wayland session
+    const char *session_type = getenv("XDG_SESSION_TYPE");
+    const char *wayland_display = getenv("WAYLAND_DISPLAY");
+
+    if ((session_type && strcmp(session_type, "wayland") == 0) || wayland_display) {
+        // In pure Wayland, XSetInputFocus can crash due to invalid X11 display
+        // Just return success and skip the actual call
+        fprintf(stderr, "wemeet-x11-fix: Blocking XSetInputFocus in Wayland mode\n");
+        return Success;
+    }
+
+    // Load original function if not already loaded
+    if (!orig_XSetInputFocus) {
+        orig_XSetInputFocus = dlsym(RTLD_NEXT, "XSetInputFocus");
+        if (!orig_XSetInputFocus) {
+            fprintf(stderr, "wemeet-x11-fix: Failed to load XSetInputFocus\n");
+            return BadWindow;
+        }
+    }
+
+    // Call original function in X11 mode
+    return orig_XSetInputFocus(display, focus, revert_to, time);
+}
+
+// Also intercept _XGetRequest to add error handling
+static Status (*orig_XGetRequest)(Display*,  _Xconst char*, size_t, int) = NULL;
+
+__attribute__((constructor))
+static void init_x11_fix(void) {
+    fprintf(stderr, "wemeet-x11-fix: Loaded X11 compatibility fix for Wayland\n");
+}