mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-23 11:20:07 +00:00
45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/* Copyright (C) 1991-2017 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 <errno.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.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)
|
|
{
|
|
if (fd < 0 || fd2 < 0)
|
|
{
|
|
__set_errno (EBADF);
|
|
return -1;
|
|
}
|
|
|
|
if (fd == fd2)
|
|
/* No way to check that they are valid. */
|
|
return fd2;
|
|
|
|
__set_errno (ENOSYS);
|
|
return -1;
|
|
}
|
|
libc_hidden_def (__dup2)
|
|
stub_warning (dup2)
|
|
|
|
weak_alias (__dup2, dup2)
|