Move wide char related routines to wcsmbs subdir
[glibc.git] / io / dup3.c
blob17bc88a018178ae8a601962921df7f3130bfc0a8
1 /* Copyright (C) 2008, 2011 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, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <errno.h>
20 #include <fcntl.h>
21 #include <unistd.h>
24 /* Duplicate FD to FD2, closing the old FD2 and making FD2 be
25 open the same file as FD is which setting flags according to
26 FLAGS. Return FD2 or -1. */
27 int
28 dup3 (fd, fd2, flags)
29 int fd;
30 int fd2;
31 int flags;
33 if (fd < 0 || fd2 < 0)
35 __set_errno (EBADF);
36 return -1;
39 if (fd == fd2)
40 /* No way to check that they are valid. */
41 return fd2;
43 __set_errno (ENOSYS);
44 return -1;
46 libc_hidden_def (dup3)
47 stub_warning (dup3)
49 #include <stub-tag.h>