1 files changed, 23 insertions, 0 deletions
diff --git a/c/src/exec/libcsupport/src/dup.c b/c/src/exec/libcsupport/src/dup.c
new file mode 100644
index 0000000000..c17db588a7
--- /dev/null
+++ b/c/src/exec/libcsupport/src/dup.c
@@ -0,0 +1,23 @@
+/*
+ *  dup() - POSIX 1003.1b 6.2.1 Duplicate an Open File Descriptor
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <unistd.h>
+#include <fcntl.h>
+
+int dup(
+  int fildes
+)
+{
+  return fcntl( fildes, F_DUPFD, 0 );
+}