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/* Redirect stdio to the console if possible
Copyright (C) 1995,96,98,99,2001 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.org>
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <assert-backtrace.h>
#include <mach/mach.h>
#include <device/device.h>
#include <hurd.h>
#include "priv.h"
/* Make sure errors go somewhere reasonable. */
void
diskfs_console_stdio ()
{
if (getpid () > 0)
{
if (write (2, "", 0) == 0)
/* We have a working stderr from our parent (e.g. settrans -a).
Just use it. */
dup2 (2, 1);
else
{
int fd = open ("/dev/console", O_RDWR);
dup2 (fd, 0);
dup2 (fd, 1);
dup2 (fd, 2);
if (fd > 2)
close (fd);
}
}
else
{
mach_port_t dev, cons;
error_t err;
if (diskfs_boot_filesystem ())
_diskfs_boot_privports ();
err = get_privileged_ports (NULL, &dev);
assert_perror_backtrace (err);
err = device_open (dev, D_READ|D_WRITE, "console", &cons);
mach_port_deallocate (mach_task_self (), dev);
assert_perror_backtrace (err);
stdin = mach_open_devstream (cons, "r");
stdout = stderr = mach_open_devstream (cons, "w");
mach_port_deallocate (mach_task_self (), cons);
}
}
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