[PATCH 1/2] Consolidate rename Linux implementation

[Adhemerval Zanella <adhemerval dot zanella at linaro dot org>]

This patch consolidates the Linux rename implementation on
sysdeps/unix/sysv/linux/rename.c.  Current code try to use
__NR_rename if is defined and apply the same strategy for
__NR_renameat and __NR_renameat2.

Check on x86_64 and aarch64.

	* sysdeps/unix/sysv/linux/rename.c: New file.
	* sysdeps/unix/sysv/linux/generic/rename.c: Remove file.
---
 ChangeLog                                |  5 +++++
 sysdeps/unix/sysv/linux/generic/rename.c | 29 --------------------------
 sysdeps/unix/sysv/linux/rename.c         | 35 ++++++++++++++++++++++++++++++++
 3 files changed, 40 insertions(+), 29 deletions(-)
 delete mode 100644 sysdeps/unix/sysv/linux/generic/rename.c
 create mode 100644 sysdeps/unix/sysv/linux/rename.c

diff --git a/sysdeps/unix/sysv/linux/generic/rename.c b/sysdeps/unix/sysv/linux/generic/rename.c
deleted file mode 100644
index 174c147..0000000
--- a/sysdeps/unix/sysv/linux/generic/rename.c
+++ /dev/null
@@ -1,29 +0,0 @@
-/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
-
-   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/>.  */
-
-#include <stdio.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sysdep.h>
-
-/* Rename the file OLD to NEW.  */
-int
-rename (const char *old, const char *new)
-{
-  return INLINE_SYSCALL (renameat, 4, AT_FDCWD, old, AT_FDCWD, new);
-}
diff --git a/sysdeps/unix/sysv/linux/rename.c b/sysdeps/unix/sysv/linux/rename.c
new file mode 100644
index 0000000..c068346
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/rename.c
@@ -0,0 +1,35 @@
+/* Linux implementation for rename function.
+   Copyright (C) 2016 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/>.  */
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <sysdep.h>
+#include <errno.h>
+
+/* Rename the file OLD to NEW.  */
+int
+rename (const char *old, const char *new)
+{
+#if defined(__NR_rename)
+  return INLINE_SYSCALL_CALL (rename, old, new);
+#elif defined (__NR_renameat)
+  return INLINE_SYSCALL_CALL (renameat, AT_FDCWD, old, AT_FDCWD, new);
+#else
+  return INLINE_SYSCALL_CALL (renameat2, AT_FDCWD, old, AT_FDCWD, new, 0);
+#endif
+}
-- 
2.7.4