Attempt to use nvclock code for reading GPU temperature, since running

nvidia-settings couple of times for a second is highly inefficient.

nvclock/tete.c

@@ -0,0 +1,49 @@
+/* NVClock 0.8 - Linux overclocker for NVIDIA cards
+ *
+ * Copyright(C) 2001-2008 Roderick Colenbrander
+ * Copyright(C) 2012 Roman Dobosz
+ *
+ * site: http://NVClock.sourceforge.net
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "nvclock.h"
+
+
+void unload_nvclock() {
+    /* Free the config file structure */
+    if(nvclock.cfg) destroy(&nvclock.cfg);
+}
+
+int get_GPU_temp() {
+    nvclock.dpy = NULL;
+
+    if(!init_nvclock()) return 0;
+
+    atexit(unload_nvclock);
+
+    if(!set_card(0)) return 0;
+
+    if(!(nv_card->caps & (GPU_TEMP_MONITORING))) return 0;
+
+    return nv_card->get_gpu_temp(nv_card->sensor);
+}
+
+int main(){
+    printf("%dC\n", get_temp());
+}