| /* Copyright (C) 1991-2014 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 <unistd.h> |
| |
| /* Duplicate FD to FD2, closing the old FD2 and making FD2 be |
| open on the same file as FD is. Return FD2 or -1. */ |
| int |
| __dup2 (int fd, int fd2) |
| { |
| int flags = 0; |
| |
| if (fd2 == fd) |
| /* See the comment in dup3. */ |
| flags = -1; |
| |
| return __dup3 (fd, fd2, flags); |
| } |
| libc_hidden_def (__dup2) |
| weak_alias (__dup2, dup2) |
