mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
|
/* Copyright (C) 1991, 1995 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 Library General Public License as
|
||
|
|
published by the Free Software Foundation; either version 2 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
|
||
|
|
Library General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public
|
||
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
||
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
||
|
|
Cambridge, MA 02139, USA. */
|
||
|
|
|
||
|
|
#include <ansidecl.h>
|
||
|
|
#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
|
||
|
|
DEFUN(__dup2, (fd, fd2), int fd AND int fd2)
|
||
|
|
{
|
||
|
|
if (fd < 0 || fd2 < 0)
|
||
|
|
{
|
||
|
|
errno = EBADF;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fd == fd2)
|
||
|
|
/* No way to check that they are valid. */
|
||
|
|
return fd2;
|
||
|
|
|
||
|
|
errno = ENOSYS;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
stub_warning (dup2)
|
||
|
|
|
||
|
|
weak_alias (__dup2, dup2)
|