Linux: consolidate dup2 implementation

Use dup2 syscall if defined, otherwise use dup3.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>

1 files changed, 0 insertions, 35 deletions

diff --git a/sysdeps/unix/sysv/linux/generic/dup2.c b/sysdeps/unix/sysv/linux/generic/dup2.c
deleted file mode 100644
index 0dc45e9b17..0000000000
--- a/sysdeps/unix/sysv/linux/generic/dup2.c
+++ /dev/null
@@ -1,35 +0,0 @@
-/* Copyright (C) 2011-2022 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
-   <https://www.gnu.org/licenses/>.  */
-
-#include <fcntl.h>
-#include <unistd.h>
-#include <sysdep.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
-__dup2 (int fd, int fd2)
-{
-  /* For the degenerate case, check if the fd is valid (by trying to
-     get the file status flags) and return it, or else return EBADF.  */
-  if (fd == fd2)
-    return __libc_fcntl (fd, F_GETFL, 0) < 0 ? -1 : fd;
-
-  return INLINE_SYSCALL (dup3, 3, fd, fd2, 0);
-}
-libc_hidden_def (__dup2)
-weak_alias (__dup2, dup2)