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/*
* Copyright (c) 1997-1999 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit 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 GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* This piece of garbage is here to deal with the fact that the C library
* might not have a default console set yet. If it does, we need to install
* that, otherwise need to look it up. In either case, it is necessary for
* the operations to fds 0,1,2 to proceed normally, without requiring a
* call to some initializer. All this to ensure that console output works
* from the getgo in a real oskit kernel.
*/
#include <stdio.h>
#include <stdlib.h>
#include <oskit/io/asyncio.h>
#include <oskit/io/posixio.h>
#include <oskit/com/stream.h>
#include <oskit/c/environment.h>
#include "fd.h"
static struct oskit_iunknown_ops unknown_ops;
oskit_iunknown_t console_stream = { &unknown_ops };
/*
* This is a common symbol. If the program is linked with the startup
* library, its defintion will come from there. Console operations are
* then chained to that definition. Otherwise, we need to find a console
* stream to use instead. That will happen when the stream is first
* queried for its interfaces. By that time, someone had better have
* installed a console!
*/
struct oskit_stream *default_console_stream;
static OSKIT_COMDECL
query(oskit_stream_t *si, const struct oskit_guid *iid, void **out_ihandle)
{
oskit_iunknown_t *console_stream;
static int didit;
int i;
if (didit)
panic("posix console query reentry!");
console_stream = (oskit_iunknown_t *) default_console_stream;
#ifndef CPUNITS
/*
* If there is no console stream compiled in, ask the Client OS.
*/
if (!console_stream) {
oskit_error_t rc;
rc = oskit_libcenv_getconsole(libc_environment,
(void *) &console_stream);
if (rc)
exit(rc);
}
#endif
/*
* Whack the 3 stdio descriptors in the fd_array directly!
*
* Bad, BAd, BAD!
*/
for (i = 0; i < 3; i++) {
oskit_iunknown_query(console_stream,
&oskit_iunknown_iid,
(void **) &fd_array[i].obj);
oskit_iunknown_query(console_stream,
&oskit_stream_iid,
(void **) &fd_array[i].stream);
oskit_iunknown_query(console_stream,
&oskit_posixio_iid,
(void **) &fd_array[i].posixio);
oskit_iunknown_query(console_stream,
&oskit_asyncio_iid,
(void **) &fd_array[i].asyncio);
}
/*
* Will never return to this routine again ...
*/
didit = 1;
return 0;
}
static OSKIT_COMDECL_U
addref(oskit_stream_t *si)
{
panic("console ops addref");
return 1;
}
static OSKIT_COMDECL_U
release(oskit_stream_t *si)
{
panic("console ops release");
return 1;
}
static struct oskit_iunknown_ops unknown_ops = {
query,
addref,
release
};
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