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- /* Definitions of global stdio data structures.
-
- Copyright (C) 1991, 1993 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 <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, \
- (PTR) 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
- DEFUN_VOID(_cleanup)
- {
- (void) fclose((FILE *) NULL);
- }
-
-
- #ifdef HAVE_GNU_LD
- #include <gnu-stabs.h>
-
- text_set_element(__libc_atexit, _cleanup);
- #endif
-