From 04476d04fed7f5cbca232030121acca61d549116 Mon Sep 17 00:00:00 2001
From: Ross Burton <rburton@src.gnome.org>
Date: Tue, 23 Nov 2004 10:08:50 +0000
Subject: Check the xterm window ID is valid before using it

---
 src/util.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'src/util.c')

diff --git a/src/util.c b/src/util.c
index 6e9de2a7..ff7d18b3 100644
--- a/src/util.c
+++ b/src/util.c
@@ -272,8 +272,16 @@ transient_get_xterm (void)
   if (wid_str) {
     char *wid_str_end;
     Window wid = strtoul (wid_str, &wid_str_end, 10);
-    if (*wid_str != '\0' && *wid_str_end == '\0' && wid != 0)
+    if (*wid_str != '\0' && *wid_str_end == '\0' && wid != 0) {
+      XWindowAttributes attrs;
+      gdk_error_trap_push ();
+      XGetWindowAttributes (GDK_DISPLAY(), wid, &attrs);
+      gdk_flush();
+      if (gdk_error_trap_pop () != 0) {
+        return None;
+      }
       return wid;
+    }
   }
   return None;
 }
-- 
cgit