path: root/boot/boot.c

/* Load a task using the single server, and then run it
   as if we were the kernel. 
   Copyright (C) 1993, 1994 Free Software Foundation

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 the GNU Hurd; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* Written by Michael I. Bushnell.  */

#include <mach.h>
#include <mach/notify.h>
#include <errno.h>
#include <device/device.h>
#include <a.out.h>
#include <fcntlbits.h>
#include <mach/message.h>
#include <mach/mig_errors.h>

#include "notify_S.h"
#include "exec_S.h"
#include "device_S.h"
#include "io_S.h"

mach_port_t privileged_host_port, master_device_port;
mach_port_t pseudo_master_device_port;
mach_port_t receive_set;
mach_port_t pseudo_console;

mach_port_t php_child_name, psmdp_child_name;

task_t child_task;
mach_port_t bootport;

int console_mscount;

/* These will prevent the Hurd-ish versions from being used */

int
task_by_pid (int pid)
{
  return syscall (-33, pid);
}

int
write (int fd,
       void *buf,
       int buflen)
{
  return syscall (4, fd, buf, buflen);
}

int
read (int fd,
      void *buf,
      int buflen)
{
  return syscall (3, fd, buf, buflen);
}

int
open (char *name,
      int flags,
      int mode)
{
  return syscall (5, name, flags, mode);
}

int
lseek (int fd,
       int off,
       int whence)
{
  return syscall (19, fd, off, whence);
}

int
_exit (int code)
{
  return syscall (1, code);
}

int
getpid ()
{
  return syscall (20);
}

int
ioctl (int fd, int code, char *buf)
{
  return syscall (54, fd, code, buf);
}
#define IOCPARM_MASK 0x7f
#define IOC_OUT 0x40000000
#define IOC_IN 0x80000000
#define _IOR(x,y,t) (IOC_OUT|((sizeof(t)&IOCPARM_MASK)<<16)|(x<<8)|y)
#define _IOW(x,y,t) (IOC_IN|((sizeof(t)&IOCPARM_MASK)<<16)|(x<<8)|y)
#define FIONREAD _IOR('f', 127, int)
#define FIOASYNC _IOW('f', 125, int)

#define SIGIO 23
#define SIGEMSG 30
#define SIGMSG 31
struct sigvec
{
  int (*sv_handler)();
  int sv_mask;
  int sv_flags;
};

int
sigpause (mask)
{
  return syscall (111, mask);
}


#if 0
void
sigreturn ()
{
  asm volatile ("movl $0x67,%eax\n"
		"lcall $0x7, $0x0\n"
		"ret");
}

void
_sigreturn ()
{
  asm volatile ("addl $0xc, %%esp\n"
		"call %0\n"
		"ret"::"m" (sigreturn));
}

int
sigvec (int sig, struct sigvec *vec, struct sigvec *ovec)
{
  asm volatile ("movl $0x6c,%%eax\n"
		"movl %0, %%edx\n"
		"orl $0x80000000, %%edx\n"
		"lcall $0x7,$0x0\n"
		"ret"::"g" (_sigreturn));
}
#endif

int
request_server (mach_msg_header_t *inp,
		mach_msg_header_t *outp)
{
  return (exec_server (inp, outp)
	  || io_server (inp, outp)
	  || device_server (inp, outp)
	  || notify_server (inp, outp));
}

vm_address_t
load_image (task_t t,
	    char *file)
{
  int fd;
  struct exec x;
  char *buf;
  int headercruft;
  vm_address_t base = 0x10000;
  int amount;
  vm_address_t bsspagestart, bssstart, stackaddr;
  int magic;

  fd = open (file, 0, 0);
  
  read (fd, &x, sizeof (struct exec));
  magic = N_MAGIC (x);

  headercruft = sizeof (struct exec) * (magic == ZMAGIC);
  
  amount = round_page (headercruft + x.a_text + x.a_data);
  vm_allocate (mach_task_self (), (u_int *)&buf, amount, 1);
  lseek (fd, -headercruft, 1);
  read (fd, buf, amount);
  vm_allocate (t, &base, amount, 0);
  vm_write (t, base, (u_int) buf, amount);
  if (magic != OMAGIC)
    vm_protect (t, base, trunc_page (headercruft + x.a_text),
		0, VM_PROT_READ | VM_PROT_EXECUTE);
  vm_deallocate (mach_task_self (), (u_int)buf, amount);

  bssstart = base + x.a_text + x.a_data + headercruft;
  bsspagestart = round_page (bssstart);
  vm_allocate (t, &bsspagestart, x.a_bss - (bsspagestart - bssstart), 0);
  
  return x.a_entry;
}


void read_reply ();

int
main (int argc, char **argv, char **envp)
{
  task_t newtask;
  thread_t newthread;
  mach_port_t foo;
  vm_address_t startpc;
  char msg[] = "Boot is here.\n";
  char c;
  struct sigvec vec = {read_reply, 0, 0};
  mach_msg_timeout_t timeout;

  write (1, msg, sizeof msg);

  privileged_host_port = task_by_pid (-1);
  master_device_port = task_by_pid (-2);

  task_create (mach_task_self (), 0, &newtask);
  
  startpc = load_image (newtask, argv[1]);
  
  mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_PORT_SET,
		      &receive_set);
  
  mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE, 
		      &pseudo_master_device_port);
  mach_port_move_member (mach_task_self (), pseudo_master_device_port,
			 receive_set);

  mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE,
		      &pseudo_console);
  mach_port_move_member (mach_task_self (), pseudo_console, receive_set);
  mach_port_request_notification (mach_task_self (), pseudo_console,
				  MACH_NOTIFY_NO_SENDERS, 1, pseudo_console, 
				  MACH_MSG_TYPE_MAKE_SEND_ONCE, &foo);
  if (foo != MACH_PORT_NULL)
    mach_port_deallocate (mach_task_self (), foo);

  mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE, &bootport);
  mach_port_move_member (mach_task_self (), bootport, receive_set);

  mach_port_insert_right (mach_task_self (), bootport, bootport, 
			  MACH_MSG_TYPE_MAKE_SEND);
  task_set_bootstrap_port (newtask, bootport);
  mach_port_deallocate (mach_task_self (), bootport);

#if 0
  mach_port_request_notification (mach_task_self (), newtask, 
				  MACH_NOTIFY_DEAD_NAME, 1, bootport, 
				  MACH_MSG_TYPE_MAKE_SEND_ONCE, &foo);
  if (foo)
    mach_port_deallocate (mach_task_self (), foo);
#endif
  child_task = newtask;

  php_child_name = 100;
  psmdp_child_name = 101;
  mach_port_insert_right (newtask, php_child_name, privileged_host_port,
			  MACH_MSG_TYPE_COPY_SEND);
  mach_port_insert_right (newtask, psmdp_child_name, pseudo_master_device_port,
			  MACH_MSG_TYPE_MAKE_SEND);

  foo = 1;
  ioctl (0, FIOASYNC, &foo);
  sigvec (SIGIO, &vec, 0);
  sigvec (SIGMSG, &vec, 0);
  sigvec (SIGEMSG, &vec, 0);
  
  thread_create (newtask, &newthread);
  __mach_setup_thread (newtask, newthread, startpc);

  write (1, "pausing\n", 8);
  read (0, &c, 1);
  thread_resume (newthread);
  
  while (1)
    {
      mach_msg_server_timeout (request_server, 0, receive_set,
			       MACH_RCV_TIMEOUT, 0);
      getpid ();
    }
  
/*  mach_msg_server (request_server, __vm_page_size * 2, receive_set); */
}


enum read_type
{
  DEV_READ,
  DEV_READI,
  IO_READ,
};
struct qr
{
  enum read_type type;
  mach_port_t reply_port;
  mach_msg_type_name_t reply_type;
  int amount;
  struct qr *next;
};
struct qr *qrhead, *qrtail;

/* Queue a read for later reply. */
void
queue_read (enum read_type type,
	    mach_port_t reply_port,
	    mach_msg_type_name_t reply_type,
	    int amount)
{
  struct qr *qr;
  
  qr = malloc (sizeof (struct qr));
  qr->type = type;
  qr->reply_port = reply_port;
  qr->reply_type = reply_type;
  qr->amount = amount;
  qr->next = 0;
  if (qrtail)
    qrtail->next = qr;
  else
    qrhead = qrtail = qr;
}

/* Reply to a queued read. */
void
read_reply ()
{
  int avail;
  struct qr *qr;
  char * buf;
  int amtread;

  if (!qrhead)
    return;
  qr = qrhead;
  qrhead = qr->next;
  if (qr == qrtail)
    qrtail = 0;
  
  ioctl (0, FIONREAD, &avail);
  if (!avail)
    return;
  
  if (qr->type == DEV_READ)
    vm_allocate (mach_task_self (), (vm_address_t *)&buf, qr->amount, 1);
  else
    buf = alloca (qr->amount);
  amtread = read (0, buf, qr->amount);

  switch (qr->type)
    {
    case DEV_READ:
      if (amtread >= 0)
	ds_device_read_reply (qr->reply_port, qr->reply_type, 0,
			      (vm_address_t)buf, amtread);
      else
	ds_device_read_reply (qr->reply_port, qr->reply_type, errno, 0, 0);
      break;
      
    case DEV_READI:
      if (amtread >= 0)
	ds_device_read_reply_inband (qr->reply_port, qr->reply_type, 0,
				     buf, amtread);
      else
	ds_device_read_reply_inband (qr->reply_port, qr->reply_type, errno,
				     0, 0);
      break;
      
    case IO_READ:
      if (amtread >= 0)
	io_read_reply (qr->reply_port, qr->reply_type, 0,
		       buf, amtread);
      else
	io_read_reply (qr->reply_port, qr->reply_type, errno, 0, 0);
      break;
    }

  free (qr);
}


/* Implementation of exec interface */


S_exec_exec (
	mach_port_t execserver,
	mach_port_t file,
	mach_port_t oldtask,
	int flags,
	data_t argv,
	mach_msg_type_number_t argvCnt,
	boolean_t argvSCopy,
	data_t envp,
	mach_msg_type_number_t envpCnt,
	boolean_t envpSCopy,
	portarray_t dtable,
	mach_msg_type_number_t dtableCnt,
	portarray_t portarray,
	mach_msg_type_number_t portarrayCnt,
	intarray_t intarray,
	mach_msg_type_number_t intarrayCnt,
	mach_port_array_t deallocnames,
	mach_msg_type_number_t deallocnamesCnt,
	mach_port_array_t destroynames,
	mach_msg_type_number_t destroynamesCnt)
{
  return EOPNOTSUPP;
}

S_exec_init (
	mach_port_t execserver,
	auth_t auth_handle,
	process_t proc_server)
{
  return EOPNOTSUPP;
}

S_exec_setexecdata (
	mach_port_t execserver,
	portarray_t ports,
	mach_msg_type_number_t portsCnt,
	intarray_t ints,
	mach_msg_type_number_t intsCnt)
{
  return EOPNOTSUPP;
}


error_t
S_exec_startup (mach_port_t port,
		u_int *base_addr,
		vm_size_t *stack_size,
		int *flags,
		char **argvP,
		u_int *argvlen,
		char **envpP,
		u_int *envplen,
		mach_port_t **dtableP,
		mach_msg_type_name_t *dtablepoly,
		u_int *dtablelen,
		mach_port_t **portarrayP,
		mach_msg_type_name_t *portarraypoly,
		u_int *portarraylen,
		int **intarrayP,
		u_int *intarraylen)
{
  mach_port_t *portarray, *dtable;
  int *intarray, nc;
  char argv[100];

  /* The argv string has nulls in it; so we use %c for the nulls
     and fill with constant zero. */
  nc = sprintf (argv, "[BOOTSTRAP]%c-x%c%d%c%d%c%s", '\0', '\0',
		php_child_name, '\0', psmdp_child_name, '\0', "hd0f");

  if (nc > *argvlen)
    vm_allocate (mach_task_self (), (vm_address_t *)argvP, nc, 1);
  bcopy (argv, *argvP, nc);
  *argvlen = nc;
  
  *base_addr = *stack_size = 0;

  *flags = 0;
  
  *envplen = 0;

  if (*portarraylen < INIT_PORT_MAX)
    vm_allocate (mach_task_self (), (u_int *)portarrayP,
		 (INIT_PORT_MAX * sizeof (mach_port_t)), 1);
  portarray = *portarrayP;
  *portarraylen = INIT_PORT_MAX;
  *portarraypoly = MACH_MSG_TYPE_COPY_SEND;

  *dtablelen = 0;
  *dtablepoly = MACH_MSG_TYPE_COPY_SEND;
  
  if (*intarraylen < INIT_INT_MAX)
    vm_allocate (mach_task_self (), (u_int *)intarrayP,
		 (INIT_INT_MAX * sizeof (mach_port_t)), 1);
  intarray = *intarrayP;
  *intarraylen = INIT_INT_MAX;
  
  bzero (portarray, INIT_PORT_MAX * sizeof (mach_port_t));
  bzero (intarray, INIT_INT_MAX * sizeof (int));
  
  return 0;
}



/* Implementation of device interface */

ds_device_open (mach_port_t master_port,
		mach_port_t reply_port,
		mach_msg_type_name_t reply_type,
		dev_mode_t mode,
		dev_name_t name,
		mach_port_t *device,
		mach_msg_type_name_t *devicetype)
{
  if (master_port != pseudo_master_device_port)
    return D_INVALID_OPERATION;
  
  if (!strcmp (name, "console"))
    {
#if 0
      mach_port_insert_right (mach_task_self (), pseudo_console,
			      pseudo_console, MACH_MSG_TYPE_MAKE_SEND);
      console_send_rights++;
#endif
      console_mscount++;
      *device = pseudo_console;
      *devicetype = MACH_MSG_TYPE_MAKE_SEND;
      return 0;
    }
  
  *devicetype = MACH_MSG_TYPE_MOVE_SEND;
  return device_open (master_device_port, mode, name, device);
}

ds_device_close (device_t device)
{
  if (device != pseudo_console)
    return D_NO_SUCH_DEVICE;
  return 0;
}

ds_device_write (device_t device,
		 mach_port_t reply_port,
		 mach_msg_type_name_t reply_type,
		 dev_mode_t mode,
		 recnum_t recnum,
		 io_buf_ptr_t data,
		 unsigned int datalen,
		 int *bytes_written)
{
  if (device != pseudo_console)
    return D_NO_SUCH_DEVICE;

#if 0
  if (console_send_rights)
    {
      mach_port_mod_refs (mach_task_self (), pseudo_console, 
			  MACH_PORT_TYPE_SEND, -console_send_rights);
      console_send_rights = 0;
    }
#endif

  *bytes_written = write (1, (void *)*data, datalen);
  
  return (*bytes_written == -1 ? D_IO_ERROR : D_SUCCESS);
}

ds_device_write_inband (device_t device,
			mach_port_t reply_port,
			mach_msg_type_name_t reply_type,
			dev_mode_t mode,
			recnum_t recnum,
			io_buf_ptr_inband_t data,
			unsigned int datalen,
			int *bytes_written)
{
  if (device != pseudo_console)
    return D_NO_SUCH_DEVICE;

#if 0
  if (console_send_rights)
    {
      mach_port_mod_refs (mach_task_self (), pseudo_console, 
			  MACH_PORT_TYPE_SEND, -console_send_rights);
      console_send_rights = 0;
    }
#endif

  *bytes_written = write (1, data, datalen);
  
  return (*bytes_written == -1 ? D_IO_ERROR : D_SUCCESS);
}

ds_device_read (device_t device,
		mach_port_t reply_port,
		mach_msg_type_name_t reply_type,
		dev_mode_t mode,
		recnum_t recnum,
		int bytes_wanted,
		io_buf_ptr_t *data,
		unsigned int *datalen)
{
  int avail;
  if (device != pseudo_console)
    return D_NO_SUCH_DEVICE;

#if 0  
  if (console_send_rights)
    {
      mach_port_mod_refs (mach_task_self (), pseudo_console, 
			  MACH_PORT_TYPE_SEND, -console_send_rights);
      console_send_rights = 0;
    }
#endif

  ioctl (0, FIONREAD, &avail);
  if (avail)
    {
      vm_allocate (mach_task_self (), (pointer_t *)data, bytes_wanted, 1);
      *datalen = read (0, *data, bytes_wanted);
      return (*datalen == -1 ? D_IO_ERROR : D_SUCCESS);
    }
  else
    {
      queue_read (DEV_READ, reply_port, reply_type, bytes_wanted);
      return MIG_NO_REPLY;
    }
}

ds_device_read_inband (device_t device,
		       mach_port_t reply_port,
		       mach_msg_type_name_t reply_type,
		       dev_mode_t mode,
		       recnum_t recnum,
		       int bytes_wanted,
		       io_buf_ptr_inband_t data,
		       unsigned int *datalen)
{
  int avail;
  if (device != pseudo_console)
    return D_NO_SUCH_DEVICE;

#if 0  
  if (console_send_rights)
    {
      mach_port_mod_refs (mach_task_self (), pseudo_console, 
			  MACH_PORT_TYPE_SEND, -console_send_rights);
      console_send_rights = 0;
    }
#endif

  ioctl (0, FIONREAD, &avail);
  if (avail)
    {
      *datalen = read (0, data, bytes_wanted);
      return (*datalen == -1 ? D_IO_ERROR : D_SUCCESS);
    }
  else
    {
      queue_read (DEV_READI, reply_port, reply_type, bytes_wanted);
      return MIG_NO_REPLY;
    }
}

ds_xxx_device_set_status (device_t device,
			  dev_flavor_t flavor,
			  dev_status_t status,
			  u_int statu_cnt)
{
  if (device != pseudo_console)
    return D_NO_SUCH_DEVICE;
  return D_INVALID_OPERATION;
}

ds_xxx_device_get_status (device_t device,
			  dev_flavor_t flavor,
			  dev_status_t status,
			  u_int *statuscnt)
{
  if (device != pseudo_console)
    return D_NO_SUCH_DEVICE;
  return D_INVALID_OPERATION;
}

ds_xxx_device_set_filter (device_t device,
			  mach_port_t rec,
			  int pri,
			  filter_array_t filt,
			  unsigned int len)
{
  if (device != pseudo_console)
    return D_NO_SUCH_DEVICE;
  return D_INVALID_OPERATION;
}

ds_device_map (device_t device,
	       vm_prot_t prot,
	       vm_offset_t offset,
	       vm_size_t size,
	       memory_object_t *pager,
	       int unmap)
{
  if (device != pseudo_console)
    return D_NO_SUCH_DEVICE;
  return D_INVALID_OPERATION;
}

ds_device_set_status (device_t device,
		      dev_flavor_t flavor,
		      dev_status_t status,
		      unsigned int statuslen)
{
  if (device != pseudo_console)
    return D_NO_SUCH_DEVICE;
  return D_INVALID_OPERATION;
}

ds_device_get_status (device_t device,
		      dev_flavor_t flavor,
		      dev_status_t status,
		      unsigned int *statuslen)
{
  if (device != pseudo_console)
    return D_NO_SUCH_DEVICE;
  return D_INVALID_OPERATION;
}

ds_device_set_filter (device_t device,
		      mach_port_t receive_port,
		      int priority,
		      filter_array_t filter,
		      unsigned int filterlen)
{
  if (device != pseudo_console)
    return D_NO_SUCH_DEVICE;
  return D_INVALID_OPERATION;
}


/* Implementation of notify interface */
do_mach_notify_port_deleted (mach_port_t notify,
			     mach_port_t name)
{
  return EOPNOTSUPP;
}

do_mach_notify_msg_accepted (mach_port_t notify,
			     mach_port_t name)
{
  return EOPNOTSUPP;
}

do_mach_notify_port_destroyed (mach_port_t notify,
			       mach_port_t port)
{
  return EOPNOTSUPP;
}

do_mach_notify_no_senders (mach_port_t notify,
			   mach_port_mscount_t mscount)
{
  mach_port_t foo;
  if (notify == pseudo_console)
    {
      if (mscount == console_mscount)
	_exit (0);
      else
	{
	  mach_port_request_notification (mach_task_self (), pseudo_console,
					  MACH_NOTIFY_NO_SENDERS, 
					  console_mscount, pseudo_console,
					  MACH_MSG_TYPE_MAKE_SEND_ONCE, &foo);
	  if (foo != MACH_PORT_NULL)
	    mach_port_deallocate (mach_task_self (), foo);
	}
    }

  return EOPNOTSUPP;
}

do_mach_notify_send_once (mach_port_t notify)
{
  return EOPNOTSUPP;
}

do_mach_notify_dead_name (mach_port_t notify,
			  mach_port_t name)
{
#if 0
  if (name == child_task && notify == bootport)
    _exit (0);
#endif
  return EOPNOTSUPP;
}


/* Implementation of the Hurd I/O interface, which
   we support for the console port only. */

error_t
S_io_write (mach_port_t object,
	    char *data,
	    u_int datalen,
	    off_t offset,
	    int *amtwritten)
{
  if (object != pseudo_console)
    return EOPNOTSUPP;

#if 0
  if (console_send_rights)
    {
      mach_port_mod_refs (mach_task_self (), pseudo_console, 
			  MACH_PORT_TYPE_SEND, -console_send_rights);
      console_send_rights = 0;
    }
#endif

  *amtwritten = write (1, data, datalen);
  return *amtwritten == -1 ? errno : 0;
}

error_t
S_io_read (mach_port_t object,
	   mach_port_t reply_port,
	   mach_msg_type_name_t reply_type,
	   char **data,
	   u_int *datalen,
	   off_t offset,
	   int amount)
{
  int avail;
  if (object != pseudo_console)
    return EOPNOTSUPP;
  
#if 0
  if (console_send_rights)
    {
      mach_port_mod_refs (mach_task_self (), pseudo_console, 
			  MACH_PORT_TYPE_SEND, -console_send_rights);
      console_send_rights = 0;
    }
#endif

  ioctl (0, FIONREAD, &avail);
  if (avail)
    {
      if (amount > *datalen)
	vm_allocate (mach_task_self (), amount, data, 1);
      *datalen = read (0, *data, amount);
      return *datalen < 0 ? errno : 0;
    }
  else
    {
      queue_read (IO_READ, reply_port, reply_type, amount);
      return MIG_NO_REPLY;
    }
}

error_t 
S_io_seek (mach_port_t object,
	   off_t offset,
	   int whence,
	   off_t *newp)
{
  return object == pseudo_console ? ESPIPE : EOPNOTSUPP;
}

error_t
S_io_readable (mach_port_t object,
	       int *amt)
{
  return EOPNOTSUPP;
}

error_t 
S_io_set_all_openmodes (mach_port_t object,
			int bits)
{
  return EOPNOTSUPP;
}

error_t
S_io_get_openmodes (mach_port_t object,
		    int *modes)
{
  *modes = O_READ | O_WRITE;
  return object == pseudo_console ? 0 : EOPNOTSUPP;
}

error_t
S_io_set_some_openmodes (mach_port_t object,
			 int bits)
{
  return EOPNOTSUPP;
}

error_t
S_io_clear_some_openmodes (mach_port_t object,
			   int bits)
{
  return EOPNOTSUPP;
}

error_t
S_io_async (mach_port_t object,
	    mach_port_t notify,
	    mach_port_t *id)
{
  return EOPNOTSUPP;
}

error_t
S_io_mod_owner (mach_port_t object,
		pid_t owner)
{
  return EOPNOTSUPP;
}

error_t
S_io_get_owner (mach_port_t object,
		pid_t *owner)
{
  return EOPNOTSUPP;
}

error_t
S_io_get_icky_async_id (mach_port_t object,
			mach_port_t *id)
{
  return EOPNOTSUPP;
}

error_t
S_io_select (mach_port_t object,
	     int type,
	     mach_port_t ret,
	     int tag,
	     int *result)
{
  return EOPNOTSUPP;
}

error_t
S_io_stat (mach_port_t object,
	   struct stat *st)
{
  if (object != pseudo_console)
    return EOPNOTSUPP;
  
  bzero (st, sizeof (struct stat));
  st->st_blksize = 1024;
  return 0;
}

error_t
S_io_reauthenticate (mach_port_t object,
		     int rendint)
{
  return EOPNOTSUPP;
}

error_t
S_io_restrict_auth (mach_port_t object,
		    mach_port_t *newobject,
		    mach_msg_type_name_t *newobjtype,
		    uid_t *uids,
		    u_int nuids,
		    uid_t *gids,
		    u_int ngids)
{
  if (object != pseudo_console)
    return EOPNOTSUPP;
  *newobject = pseudo_console;
  *newobjtype = MACH_MSG_TYPE_MAKE_SEND;
  console_mscount++;
  return 0;
}

error_t
S_io_duplicate (mach_port_t object,
		mach_port_t *newobj,
		mach_msg_type_name_t *newobjtype)
{
  if (object != pseudo_console)
    return EOPNOTSUPP;
  *newobj = pseudo_console;
  *newobjtype = MACH_MSG_TYPE_MAKE_SEND;
  console_mscount++;
  return 0;
}

error_t
S_io_server_version (mach_port_t object,
		     char *name,
		     int *maj,
		     int *min,
		     int *edit)
{
  return EOPNOTSUPP;
}

error_t
S_io_map (mach_port_t obj,
	  mach_port_t *rd,
	  mach_msg_type_name_t *rdtype,
	  mach_port_t *wr,
	  mach_msg_type_name_t *wrtype)
{
  return EOPNOTSUPP;
}

error_t
S_io_map_cntl (mach_port_t obj,
	       mach_port_t *mem)
{
  return EOPNOTSUPP;
}

error_t
S_io_get_conch (mach_port_t obj)
{
  return EOPNOTSUPP;
}

error_t
S_io_release_conch (mach_port_t obj)
{
  return EOPNOTSUPP;
}

error_t
S_io_eofnotify (mach_port_t obj)
{
  return EOPNOTSUPP;
}

error_t
S_io_prenotify (mach_port_t obj,
		int start,
		int end)
{
  return EOPNOTSUPP;
}

error_t
S_io_postnotify (mach_port_t obj,
		 int start,
		 int end)
{
  return EOPNOTSUPP;
}

error_t
S_io_readsleep (mach_port_t obj)
{
  return EOPNOTSUPP;
}

error_t
S_io_sigio (mach_port_t obj)
{
  return EOPNOTSUPP;
}