1 files changed, 12 insertions, 0 deletions
diff --git a/src/lib9/dup.c b/src/lib9/dup.c
new file mode 100644
index 00000000..feec1b77
--- /dev/null
+++ b/src/lib9/dup.c
@@ -0,0 +1,12 @@
+#include <u.h>
+#include <libc.h>
+
+#undef dup
+
+int
+p9dup(int old, int new)
+{
+	if(new == -1)
+		return dup(old);
+	return dup2(old, new);
+}