mach/hello.c

   1 /* "Hello world" program for GNU C Library on bare Mach 3.0.
   2    Copyright (C) 1991, 1992, 1993, 1997 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <mach.h>
  21 #include <device/device.h>
  22 #include <errno.h>
  23 #include <stdio.h>
  24
  25 int
  26 main (void)
  27 {
  28   kern_return_t err;
  29   mach_port_t device, consdev;
  30   FILE *consf;
  31
  32   err = get_privileged_ports (NULL, &device);
  33   if (err)
  34     _exit (err);
  35   err = device_open (device, D_WRITE, "console", &consdev);
  36   mach_port_deallocate (mach_task_self (), device);
  37   if (err)
  38     _exit (err);
  39
  40   consf = mach_open_devstream (consdev, "w");
  41   if (consf == NULL)
  42     exit (errno);
  43
  44   fputs ("Hello, world!\n", consf);
  45
  46   return 0;
  47 }