mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 08:40:07 +00:00
53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/* Copyright (C) 1993,95,96,97,2002 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/>.
|
|
|
|
As a special exception, if you link the code in this file with
|
|
files compiled with a GNU compiler to produce an executable,
|
|
that does not cause the resulting executable to be covered by
|
|
the GNU Lesser General Public License. This exception does not
|
|
however invalidate any other reasons why the executable file
|
|
might be covered by the GNU Lesser General Public License.
|
|
This exception applies to code released by its copyright holders
|
|
in files containing the exception. */
|
|
|
|
#include "libioP.h"
|
|
#include <stdio.h>
|
|
|
|
int
|
|
fileno (fp)
|
|
_IO_FILE* fp;
|
|
{
|
|
CHECK_FILE (fp, EOF);
|
|
|
|
if (!(fp->_flags & _IO_IS_FILEBUF) || _IO_fileno (fp) < 0)
|
|
{
|
|
__set_errno (EBADF);
|
|
return -1;
|
|
}
|
|
|
|
return _IO_fileno (fp);
|
|
}
|
|
libc_hidden_def (fileno)
|
|
|
|
#ifdef weak_alias
|
|
/* The fileno implementation for libio does not require locking because
|
|
it only accesses once a single variable and this is already atomic
|
|
(at least at thread level). Therefore we don't test _IO_MTSAFE_IO here. */
|
|
|
|
weak_alias (fileno, fileno_unlocked)
|
|
#endif
|