1 files changed, 13 insertions, 0 deletions
diff --git a/lang/modula-3-socks/files/dup.c b/lang/modula-3-socks/files/dup.c
new file mode 100644
index 000000000000..188ff67fd6b3
--- /dev/null
+++ b/lang/modula-3-socks/files/dup.c
@@ -0,0 +1,13 @@
+#include "wrap.h"
+#include <unistd.h>
+
+int
+m3_dup(int oldd)
+{
+  int result;
+
+  ENTER_CRITICAL;
+  result = dup(oldd);
+  EXIT_CRITICAL;
+  return result;
+}