1 /* Copyright (C) 2008-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
23 /* Duplicate FD to FD2, closing the old FD2 and making FD2 be
24 open the same file as FD is which setting flags according to
25 FLAGS. Return FD2 or -1. */
27 __dup3 (int fd
, int fd2
, int flags
)
29 if (fd
< 0 || fd2
< 0)
36 /* No way to check that they are valid. */
42 libc_hidden_def (__dup3
)
43 weak_alias (__dup3
, dup3
)