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-rw-r--r--sysdeps/stub/dup2.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/sysdeps/stub/dup2.c b/sysdeps/stub/dup2.c
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index 0000000000..a0f7aad47d
--- /dev/null
+++ b/sysdeps/stub/dup2.c
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+/* Copyright (C) 1991, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+
+/* Duplicate FD to FD2, closing the old FD2 and making FD2 be
+ open the same file as FD is. Return FD2 or -1. */
+int
+DEFUN(__dup2, (fd, fd2), int fd AND int fd2)
+{
+ if (fd < 0 || fd2 < 0)
+ {
+ errno = EBADF;
+ return -1;
+ }
+
+ if (fd == fd2)
+ /* No way to check that they are valid. */
+ return fd2;
+
+ errno = ENOSYS;
+ return -1;
+}
+stub_warning (dup2)
+
+weak_alias (__dup2, dup2)