mach/hello.c

   1 /* "Hello world" program for GNU C Library on bare Mach 3.0.
   2
   3 Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
   4 This file is part of the GNU C Library.
   5
   6 The GNU C Library is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU Library General Public License as
   8 published by the Free Software Foundation; either version 2 of the
   9 License, or (at your option) any later version.
  10
  11 The GNU C Library is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 Library General Public License for more details.
  15
  16 You should have received a copy of the GNU Library General Public
  17 License along with the GNU C Library; see the file COPYING.LIB.  If
  18 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  19 Cambridge, MA 02139, USA.  */
  20
  21 #include <mach.h>
  22 #include <device/device.h>
  23 #include <errno.h>
  24 #include <stdio.h>
  25
  26 int
  27 main (void)
  28 {
  29   kern_return_t err;
  30   mach_port_t device, consdev;
  31   FILE *consf;
  32
  33   err = get_privileged_ports (NULL, &device);
  34   if (err)
  35     _exit (err);
  36   err = device_open (device, D_WRITE, "console", &consdev);
  37   mach_port_deallocate (mach_task_self (), device);
  38   if (err)
  39     _exit (err);
  40
  41   consf = mach_open_devstream (consdev, "w");
  42   if (consf == NULL)
  43     exit (errno);
  44
  45   fputs ("Hello, world!\n", consf);
  46
  47   return 0;
  48 }