1 files changed, 54 insertions, 2 deletions
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Rootless.c b/nx-X11/programs/Xserver/hw/nxagent/Rootless.c
index 612e71cf7..706aa9320 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Rootless.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Rootless.c
@@ -1,6 +1,6 @@
 /**************************************************************************/
 /*                                                                        */
-/* Copyright (c) 2001, 2010 NoMachine, http://www.nomachine.com/.         */
+/* Copyright (c) 2001, 2011 NoMachine, http://www.nomachine.com/.         */
 /*                                                                        */
 /* NXAGENT, NX protocol compression and NX extensions to this software    */
 /* are copyright of NoMachine. Redistribution and use of the present      */
@@ -725,7 +725,57 @@ int nxagentExportProperty(pWin, property, type, format, mode, nUnits, value)
     }
     else
     {
-      XChangeProperty(nxagentDisplay, nxagentWindow(pWin), propertyX, typeX, format, mode, (void*)output, nUnits);
+      #ifdef TEST
+      fprintf(stderr, "nxagentExportProperty: Property [%lu] format [%i] "
+                  "units [%lu].\n", propertyX, format, nUnits);
+      #endif
+
+      if ((format >> 3) * nUnits + sizeof(xChangePropertyReq) <
+              (MAX_REQUEST_SIZE << 2))
+      {
+        XChangeProperty(nxagentDisplay, nxagentWindow(pWin), propertyX, typeX,
+                            format, mode, (void*)output, nUnits);
+      }
+      else if (mode == PropModeReplace)
+      {
+        int n;
+        char *data;
+
+        XDeleteProperty(nxagentDisplay, nxagentWindow(pWin), propertyX);
+
+        data = (char *) output;
+
+        while (nUnits > 0)
+        {
+          if ((format >> 3) * nUnits + sizeof(xChangePropertyReq) <
+                  (MAX_REQUEST_SIZE << 2))
+          {
+            n = nUnits;
+          }
+          else
+          {
+            n = ((MAX_REQUEST_SIZE << 2) - sizeof(xChangePropertyReq)) /
+                    (format >> 3);
+          }
+
+          XChangeProperty(nxagentDisplay, nxagentWindow(pWin), propertyX,
+                              typeX, format, PropModeAppend, (void*) data, n);
+
+          nUnits -= n;
+
+          data = (char *) data + n * (format >> 3);
+        }
+      }
+      else
+      {
+        #ifdef WARNING
+        fprintf(stderr, "nxagentExportProperty: WARNING! "
+                    "Property [%lu] too long.\n", propertyX);
+        #endif
+
+        goto nxagentExportPropertyError;
+      }
+
       nxagentAddPropertyToList(propertyX, pWin);
     }
   }
@@ -740,6 +790,8 @@ int nxagentExportProperty(pWin, property, type, format, mode, nUnits, value)
     #endif
   }
 
+  nxagentExportPropertyError:
+
   if (freeMem)
   {
     xfree(output);