misd: add open_standard_streams

misc/open_standard_streams.h

@@ -0,0 +1,47 @@
+/**
+ * @file open_standard_streams.h
+ * @author Ambroz Bizjak <ambrop7@gmail.com>
+ * 
+ * @section LICENSE
+ * 
+ * This file is part of BadVPN.
+ * 
+ * BadVPN is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ * 
+ * BadVPN 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef BADVPN_OPEN_STANDARD_STREAMS_H
+#define BADVPN_OPEN_STANDARD_STREAMS_H
+
+#ifndef BADVPN_USE_WINAPI
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#endif
+
+static void open_standard_streams (void)
+{
+#ifndef BADVPN_USE_WINAPI
+    int fd;
+    
+    do {
+        fd = open("/dev/null", O_RDWR);
+        if (fd > 2) {
+            close(fd);
+        }
+    } while (fd >= 0 && fd <= 2);
+#endif
+}
+
+#endif