neutrino: convert most parts to use safe_system()

e.g. network setup was leaking demux file descriptors to udhcpc
leading to strange issues later when trying to restart neutrino etc.

src/system/configure_network.cpp

@@ -2,10 +2,11 @@
  * $port: configure_network.cpp,v 1.7 2009/11/20 22:44:19 tuxbox-cvs Exp $
  *
  * (C) 2003 by thegoodguy <thegoodguy@berlios.de>
+ * (C) 2011 Stefan Seyfried
  *
  * 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
+ * the Free Software Foundation; either version 3 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
@@ -14,9 +15,7 @@
  * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <config.h>
 #include <cstdio>               /* perror... */
@@ -31,6 +30,7 @@
 #include <iomanip>
 #include <sstream>
 #include <fstream>
+#include <system/safe_system.h>
 
 CNetworkConfig::CNetworkConfig()
 {
@@ -240,7 +240,7 @@ void CNetworkConfig::startNetwork(void)
 #ifdef DEBUG
 	printf("CNetworkConfig::startNetwork: %s\n", cmd.c_str());
 #endif
-	system(cmd.c_str());
+	safe_system(cmd.c_str());
 
 	if (!inet_static) {
 		init_vars();
@@ -254,7 +254,7 @@ void CNetworkConfig::stopNetwork(void)
 #ifdef DEBUG
 	printf("CNetworkConfig::stopNetwork: %s\n", cmd.c_str());
 #endif
-	system(cmd.c_str());
+	safe_system(cmd.c_str());
 
 }