1 files changed, 53 insertions, 0 deletions
diff --git a/REORG.TODO/libio/fileno.c b/REORG.TODO/libio/fileno.c
new file mode 100644
index 0000000000..b78d4a1461
--- /dev/null
+++ b/REORG.TODO/libio/fileno.c
@@ -0,0 +1,53 @@
+/* Copyright (C) 1993-2017 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.
+
+   As a special exception, if you link the code in this file with
+   files compiled with a GNU compiler to produce an executable,
+   that does not cause the resulting executable to be covered by
+   the GNU Lesser General Public License.  This exception does not
+   however invalidate any other reasons why the executable file
+   might be covered by the GNU Lesser General Public License.
+   This exception applies to code released by its copyright holders
+   in files containing the exception.  */
+
+#include "libioP.h"
+#include <stdio.h>
+
+int
+__fileno (_IO_FILE *fp)
+{
+  CHECK_FILE (fp, EOF);
+
+  if (!(fp->_flags & _IO_IS_FILEBUF) || _IO_fileno (fp) < 0)
+    {
+      __set_errno (EBADF);
+      return -1;
+    }
+
+  return _IO_fileno (fp);
+}
+libc_hidden_def (__fileno)
+weak_alias (__fileno, fileno)
+libc_hidden_weak (fileno)
+
+#ifdef weak_alias
+/* The fileno implementation for libio does not require locking because
+   it only accesses once a single variable and this is already atomic
+   (at least at thread level).  Therefore we don't test _IO_MTSAFE_IO here.  */
+
+weak_alias (__fileno, fileno_unlocked)
+#endif