mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-17 10:30:20 +00:00
49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/* Copyright (C) 1991, 1993, 1994 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 <stdio.h>
|
|
|
|
/* Return the system file descriptor associated with STREAM. */
|
|
int
|
|
DEFUN(fileno, (stream), FILE *stream)
|
|
{
|
|
extern void __stdio_check_funcs __P ((FILE *));
|
|
|
|
if (! __validfp (stream))
|
|
{
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
__stdio_check_funcs (stream);
|
|
|
|
if (stream->__io_funcs.__fileno == NULL)
|
|
{
|
|
#ifdef EOPNOTSUPP
|
|
errno = EOPNOTSUPP;
|
|
#else
|
|
errno = ENOSYS;
|
|
#endif
|
|
return -1;
|
|
}
|
|
|
|
return (*stream->__io_funcs.__fileno) (stream->__cookie);
|
|
}
|