75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
/* Definitions of global stdio data structures.
|
||
Copyright (C) 1991, 1993, 1997 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., 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
|
||
|
||
#include <stddef.h>
|
||
#include <stdio.h>
|
||
#include <unistd.h>
|
||
|
||
/* This file defines all the global internal variables for stdio. */
|
||
|
||
/* Standard streams. */
|
||
#define READ 1, 0
|
||
#define WRITE 0, 1
|
||
#define BUFFERED 0
|
||
#define UNBUFFERED 1
|
||
#define stdstream(name, next, fd, readwrite, unbuffered) \
|
||
{ \
|
||
_IOMAGIC, \
|
||
NULL, NULL, NULL, NULL, 0, \
|
||
(void *) fd, \
|
||
{ readwrite, /* ... */ }, \
|
||
{ NULL, NULL, NULL, NULL, NULL }, \
|
||
{ NULL, NULL }, \
|
||
-1, -1, \
|
||
(next), \
|
||
NULL, '\0', 0, \
|
||
0, 0, unbuffered, 0, 0, 0, 0 \
|
||
}
|
||
static FILE stdstreams[3] =
|
||
{
|
||
stdstream (&stdstreams[0], &stdstreams[1], STDIN_FILENO, READ, BUFFERED),
|
||
stdstream (&stdstreams[1], &stdstreams[2], STDOUT_FILENO, WRITE, BUFFERED),
|
||
stdstream (&stdstreams[2], NULL, STDERR_FILENO, WRITE, UNBUFFERED),
|
||
};
|
||
FILE *stdin = &stdstreams[0];
|
||
FILE *stdout = &stdstreams[1];
|
||
FILE *stderr = &stdstreams[2];
|
||
|
||
/* Pointer to the first stream in the list. */
|
||
FILE *__stdio_head = &stdstreams[0];
|
||
|
||
/* This function MUST be in this file!
|
||
This is because we want _cleanup to go into the __libc_atexit set
|
||
when any stdio code is used (and to use any stdio code, one must reference
|
||
something defined in this file), and since only local symbols can be made
|
||
set elements, having the set element stab entry here and _cleanup elsewhere
|
||
loses; and having them both elsewhere loses because there is no reference
|
||
to cause _cleanup to be linked in. */
|
||
|
||
void
|
||
_cleanup (void)
|
||
{
|
||
__fcloseall ();
|
||
}
|
||
|
||
|
||
#ifdef HAVE_GNU_LD
|
||
text_set_element(__libc_atexit, _cleanup);
|
||
#endif
|