--- Urlader/urlader.c	2011/12/29 10:20:56	1.2
+++ Urlader/urlader.c	2011/12/29 10:39:34	1.3
@@ -35,6 +35,7 @@
    #define u_close(handle) CloseHandle (handle)
    #define u_append(path,add) PathAppend (path, add)
    #define u_write(handle,data,len) (WriteFile (handle, data, len, &dword, 0) ? dword : -1)
+   #define u_sync() // use transacted I/O?
 
 #else
 
@@ -58,6 +59,7 @@
    #define u_close(handle) close (handle - 1)
    #define u_append(path,add) strcat (strcat (path, "/"), add)
    #define u_write(handle,data,len) write ((handle) - 1, data, len)
+   #define u_sync() sync ()
 
 #endif
 
@@ -372,6 +374,8 @@
       if (u_chdir (datadir))
         fatal ("unable to change to data directory");
 
+      u_sync ();
+
       if (u_rename (tmppath, execdir))
         deltree (tmppath); // if move fails, delete new, assume other process created it independently
     }