/* main.c - experimental GRUB stage2 that runs under Unix *//* *  GRUB  --  GRand Unified Bootloader *  Copyright (C) 1999,2000,2001,2002  Free Software Foundation, Inc. * *  This program 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 of the License, or *  (at your option) any later version. * *  This program 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. *//* Simulator entry point. */int grub_stage2 (void);#include <stdio.h>#include <getopt.h>#include <unistd.h>#include <string.h>#include <stdlib.h>#include <limits.h>#include <setjmp.h>#define WITHOUT_LIBC_STUBS 1#include <shared.h>#include <term.h>char *program_name = 0;int use_config_file = 1;int use_preset_menu = 0;#ifdef HAVE_LIBCURSESint use_curses = 1;#elseint use_curses = 0;#endifint verbose = 0;int read_only = 0;int floppy_disks = 1;char *device_map_file = 0;static int default_boot_drive;static int default_install_partition;static char *default_config_file;#define OPT_HELP		-2#define OPT_VERSION		-3#define OPT_HOLD		-4#define OPT_CONFIG_FILE		-5#define OPT_INSTALL_PARTITION	-6#define OPT_BOOT_DRIVE		-7#define OPT_NO_CONFIG_FILE	-8#define OPT_NO_CURSES		-9#define OPT_BATCH		-10#define OPT_VERBOSE		-11#define OPT_READ_ONLY		-12#define OPT_PROBE_SECOND_FLOPPY	-13#define OPT_NO_FLOPPY		-14#define OPT_DEVICE_MAP		-15#define OPT_PRESET_MENU		-16#define OPT_NO_PAGER		-17#define OPTSTRING ""static struct option longopts[] ={  {"batch", no_argument, 0, OPT_BATCH},  {"boot-drive", required_argument, 0, OPT_BOOT_DRIVE},  {"config-file", required_argument, 0, OPT_CONFIG_FILE},  {"device-map", required_argument, 0, OPT_DEVICE_MAP},  {"help", no_argument, 0, OPT_HELP},  {"hold", optional_argument, 0, OPT_HOLD},  {"install-partition", required_argument, 0, OPT_INSTALL_PARTITION},  {"no-config-file", no_argument, 0, OPT_NO_CONFIG_FILE},  {"no-curses", no_argument, 0, OPT_NO_CURSES},  {"no-floppy", no_argument, 0, OPT_NO_FLOPPY},  {"no-pager", no_argument, 0, OPT_NO_PAGER},  {"preset-menu", no_argument, 0, OPT_PRESET_MENU},  {"probe-second-floppy", no_argument, 0, OPT_PROBE_SECOND_FLOPPY},  {"read-only", no_argument, 0, OPT_READ_ONLY},  {"verbose", no_argument, 0, OPT_VERBOSE},  {"version", no_argument, 0, OPT_VERSION},  {0},};static voidusage (int status){  if (status)    fprintf (stderr, "Try ``grub --help'' for more information.\n");  else    printf ("\Usage: grub [OPTION]...\n\\n\Enter the GRand Unified Bootloader command shell.\n\\n\    --batch                  turn on batch mode for non-interactive use\n\    --boot-drive=DRIVE       specify stage2 boot_drive [default=0x%x]\n\    --config-file=FILE       specify stage2 config_file [default=%s]\n\    --device-map=FILE        use the device map file FILE\n\    --help                   display this message and exit\n\    --hold                   wait until a debugger will attach\n\    --install-partition=PAR  specify stage2 install_partition [default=0x%x]\n\    --no-config-file         do not use the config file\n\    --no-curses              do not use curses\n\    --no-floppy              do not probe any floppy drive\n\    --no-pager               do not use internal pager\n\    --preset-menu            use the preset menu\n\    --probe-second-floppy    probe the second floppy drive\n\    --read-only              do not write anything to devices\n\    --verbose                print verbose messages\n\    --version                print version information and exit\n\\n\Report bugs to <bug-grub@gnu.org>.\n\",	    default_boot_drive, default_config_file,	    default_install_partition);  exit (status);}intmain (int argc, char **argv){  int c;  int hold = 0;  /* First of all, call sync so that all in-core data is scheduled to be     actually written to disks. This is very important because GRUB does     not use ordinary stdio interface but raw devices.  */  sync ();    program_name = argv[0];  default_boot_drive = boot_drive;  default_install_partition = install_partition;  if (config_file)    default_config_file = config_file;  else    default_config_file = "NONE";    /* Parse command-line options. */  do    {      c = getopt_long (argc, argv, OPTSTRING, longopts, 0);      switch (c)	{	case EOF:	  /* Fall through the bottom of the loop. */	  break;	case OPT_HELP:	  usage (0);	  break;	case OPT_VERSION:	  printf ("grub (GNU GRUB " VERSION ")\n");	  exit (0);	  break;	case OPT_HOLD:	  if (! optarg)	    hold = -1;	  else	    hold = atoi (optarg);	  break;	case OPT_CONFIG_FILE:	  strncpy (config_file, optarg, 127); /* FIXME: arbitrary */	  config_file[127] = '\0';	  break;	case OPT_INSTALL_PARTITION:	  install_partition = strtoul (optarg, 0, 0);	  if (install_partition == ULONG_MAX)	    {	      perror ("strtoul");	      exit (1);	    }	  break;	case OPT_BOOT_DRIVE:	  boot_drive = strtoul (optarg, 0, 0);	  if (boot_drive == ULONG_MAX)	    {	      perror ("strtoul");	      exit (1);	    }	  break;	case OPT_NO_CONFIG_FILE:	  use_config_file = 0;	  break;	case OPT_NO_CURSES:	  use_curses = 0;	  break;	case OPT_NO_PAGER:	  use_pager = 0;	  break;	case OPT_BATCH:	  /* This is the same as "--no-config-file --no-curses --no-pager".  */	  use_config_file = 0;	  use_curses = 0;	  use_pager = 0;	  break;	case OPT_READ_ONLY:	  read_only = 1;	  break;	case OPT_VERBOSE:	  verbose = 1;	  break;	case OPT_NO_FLOPPY:	  floppy_disks = 0;	  break;	case OPT_PROBE_SECOND_FLOPPY:	  floppy_disks = 2;	  break;	case OPT_DEVICE_MAP:	  device_map_file = strdup (optarg);	  break;	case OPT_PRESET_MENU:	  use_preset_menu = 1;	  break;	  	default:	  usage (1);	}    }  while (c != EOF);  /* Wait until the HOLD variable is cleared by an attached debugger. */  if (hold && verbose)    printf ("Run \"gdb %s %d\", and set HOLD to zero.\n",	    program_name, (int) getpid ());  while (hold)    {      if (hold > 0)	hold--;            sleep (1);    }  /* If we don't have curses (!HAVE_LIBCURSES or --no-curses or     --batch) put terminal to dumb for better handling of line i/o */  if (! use_curses)    current_term->flags = TERM_NO_EDIT | TERM_DUMB;  /* Transfer control to the stage2 simulator. */  exit (grub_stage2 ());}