Implement dup3()

Upstream-Status: Pending

Index: git/libc/sysdeps/linux/common/dup3.c
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ git/libc/sysdeps/linux/common/dup3.c	2012-01-27 07:40:52.802900849 -0800
@@ -0,0 +1,15 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * dup3() for uClibc
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+
+_syscall3(int, dup3, int, oldfd, int, newfd, int, flags)
+libc_hidden_def(dup3)
Index: git/include/unistd.h
===================================================================
--- git.orig/include/unistd.h	2012-01-27 01:19:17.521792781 -0800
+++ git/include/unistd.h	2012-01-27 07:40:03.106898447 -0800
@@ -512,6 +512,8 @@
 /* Duplicate FD to FD2, closing FD2 and making it open on the same file.  */
 extern int dup2 (int __fd, int __fd2) __THROW;
 libc_hidden_proto(dup2)
+extern int dup3 (int __fd, int __fd2, int __flags) __THROW;
+libc_hidden_proto(dup3)
 
 /* NULL-terminated array of "NAME=VALUE" environment variables.  */
 extern char **__environ;