mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-29 14:01:20 +00:00
7b945eaeae
* sysdeps/mach/hurd/defs.c (init_stdio): Put this on __libc_subinit rather than _hurd_fd_subinit, so it happens after it's safe to use libc facilities like malloc.
88 lines
3.2 KiB
C
88 lines
3.2 KiB
C
/* Definitions of global stdio data structures.
|
||
Copyright (C) 1991,92,93,94,95,97,2000 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 <stdio.h>
|
||
#include <hurd/fd.h>
|
||
#include <unistd.h>
|
||
|
||
FILE *stdin, *stdout, *stderr;
|
||
|
||
/* Pointer to the first stream in the list. */
|
||
FILE *__stdio_head = NULL;
|
||
|
||
/* XXX should be __init_stdio? */
|
||
static void
|
||
init_stdio (void)
|
||
{
|
||
inline void init (FILE **streamptr, int fd)
|
||
{
|
||
/* We want to use the existing FILE object if one has been allocated.
|
||
(This will only be the case if our image came from something like
|
||
Emacs's unexec, where we were called in the first run.) */
|
||
FILE *s = *streamptr ?: __newstream ();
|
||
struct hurd_fd *d = _hurd_fd_get (fd);
|
||
if (d == NULL)
|
||
{
|
||
/* There is no file descriptor allocated. We want the standard
|
||
streams to always refer to their standard file descriptors, even
|
||
if those descriptors are not set up until later. So allocate
|
||
the descriptor structure with no ports and store it in the
|
||
stream. Operations will fail until ports are installed in the
|
||
file descriptor. */
|
||
if (d = _hurd_alloc_fd (NULL, fd))
|
||
__spin_unlock (&d->port.lock);
|
||
}
|
||
if (s)
|
||
s->__cookie = d;
|
||
*streamptr = s;
|
||
}
|
||
#define S(NAME, FD, MODE) \
|
||
init (&NAME, FD); if (NAME) NAME->__mode.__##MODE = 1;
|
||
|
||
S (stdin, STDIN_FILENO, read);
|
||
S (stdout, STDOUT_FILENO, write);
|
||
S (stderr, STDERR_FILENO, write);
|
||
|
||
#undef S
|
||
|
||
if (stderr)
|
||
stderr->__userbuf = 1; /* stderr is always unbuffered. */
|
||
|
||
(void) &init_stdio; /* Avoid "defined but not used" warning. */
|
||
}
|
||
/* This initializer will be run along with other vanilla libc initializers
|
||
in a normal Posixoid environment. The earlier Hurd-speciifc initializer
|
||
phases cannot use normal facilities like malloc (which stdio uses). */
|
||
text_set_element (__libc_subinit, init_stdio);
|
||
|
||
/* 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 ();
|
||
}
|
||
text_set_element (__libc_atexit, _cleanup);
|