util/grub-emu.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program 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
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <stdlib.h>
  21 #include <malloc.h>
  22 #include <sys/stat.h>
  23 #include <argp.h>
  24 #include <string.h>
  25 #include <signal.h>
  26
  27 #include <grub/mm.h>
  28 #include <grub/setjmp.h>
  29 #include <grub/fs.h>
  30 #include <grub/i386/pc/util/biosdisk.h>
  31 #include <grub/dl.h>
  32 #include <grub/machine/console.h>
  33 #include <grub/util/misc.h>
  34 #include <grub/kernel.h>
  35 #include <grub/normal.h>
  36 #include <grub/util/getroot.h>
  37 #include <grub/env.h>
  38 #include <grub/partition.h>
  39
  40 #ifdef __NetBSD__
  41 /* NetBSD uses /boot for its boot block.  */
  42 # define DEFAULT_DIRECTORY      "/grub"
  43 #else
  44 # define DEFAULT_DIRECTORY      "/boot/grub"
  45 #endif
  46
  47 #define DEFAULT_DEVICE_MAP      DEFAULT_DIRECTORY "/device.map"
  48
  49 /* Used for going back to the main function.  */
  50 jmp_buf main_env;
  51
  52 grub_addr_t
  53 grub_arch_modules_addr (void)
  54 {
  55   return 0;
  56 }
  57
  58 grub_err_t
  59 grub_arch_dl_check_header (void *ehdr)
  60 {
  61   (void) ehdr;
  62
  63   return GRUB_ERR_BAD_MODULE;
  64 }
  65
  66 grub_err_t
  67 grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
  68 {
  69   (void) mod;
  70   (void) ehdr;
  71
  72   return GRUB_ERR_BAD_MODULE;
  73 }
  74
  75 void
  76 grub_machine_init (void)
  77 {
  78   signal (SIGINT, SIG_IGN);
  79   grub_console_init ();
  80 }
  81
  82 void
  83 grub_machine_fini (void)
  84 {
  85   grub_console_fini ();
  86 }
  87 \f
  88
  89 const char *argp_program_version = PACKAGE_STRING;
  90 const char *argp_program_bug_address = PACKAGE_BUGREPORT;
  91 static char doc[] = "GRUB emulator";
  92
  93 static struct argp_option options[] = {
  94   {"root-device", 'r', "DEV",  0, "use DEV as the root device [default=guessed]", 0},
  95   {"device-map",  'm', "FILE", 0, "use FILE as the device map", 0},
  96   {"directory",   'd', "DIR",  0, "use GRUB files in the directory DIR", 0},
  97   {"verbose",     'v', 0     , 0, "print verbose messages", 0},
  98   { 0, 0, 0, 0, 0, 0 }
  99 };
 100
 101 struct arguments
 102 {
 103   char *root_dev;
 104   char *dev_map;
 105   char *dir;
 106 };
 107
 108 static error_t
 109 parse_opt (int key, char *arg, struct argp_state *state)
 110 {
 111   struct arguments *args = state->input;
 112
 113   switch (key)
 114     {
 115     case 'r':
 116       args->root_dev = arg;
 117       break;
 118     case 'd':
 119       args->dir = arg;
 120       break;
 121     case 'm':
 122       args->dev_map = arg;
 123       break;
 124     case 'v':
 125       verbosity++;
 126       break;
 127     case ARGP_KEY_END:
 128       break;
 129     default:
 130       return ARGP_ERR_UNKNOWN;
 131     }
 132   return 0;
 133 }
 134
 135 static struct argp argp = {options, parse_opt, 0, doc, 0, 0, 0};
 136 \f
 137
 138 int
 139 main (int argc, char *argv[])
 140 {
 141   char *prefix = 0;
 142   char rootprefix[100];
 143   struct arguments args =
 144     {
 145       .dir = DEFAULT_DIRECTORY,
 146       .dev_map = DEFAULT_DEVICE_MAP
 147     };
 148
 149   progname = "grub-emu";
 150
 151   argp_parse (&argp, argc, argv, 0, 0, &args);
 152
 153   /* Make sure that there is a root device.  */
 154   if (! args.root_dev)
 155     {
 156       args.root_dev = grub_guess_root_device (args.dir ? : DEFAULT_DIRECTORY);
 157       if (! args.root_dev)
 158         {
 159           grub_util_info ("guessing the root device failed, because of `%s'",
 160                           grub_errmsg);
 161           grub_util_error ("Cannot guess the root device. Specify the option ``--root-device''.");
 162         }
 163     }
 164
 165   prefix = grub_get_prefix (args.dir ? : DEFAULT_DIRECTORY);
 166   sprintf (rootprefix, "%s%s", args.root_dev, prefix);
 167
 168   grub_env_set ("prefix", rootprefix);
 169
 170   /* XXX: This is a bit unportable.  */
 171   grub_util_biosdisk_init (args.dev_map);
 172   grub_pc_partition_map_init ();
 173   grub_amiga_partition_map_init ();
 174   grub_apple_partition_map_init ();
 175   grub_sun_partition_map_init ();
 176
 177   /* Initialize the default modules.  */
 178   grub_iso9660_init ();
 179   grub_fat_init ();
 180   grub_ext2_init ();
 181   grub_ufs_init ();
 182   grub_minix_init ();
 183   grub_hfs_init ();
 184   grub_jfs_init ();
 185   grub_ls_init ();
 186   grub_boot_init ();
 187   grub_cmp_init ();
 188   grub_cat_init ();
 189   grub_terminal_init ();
 190   grub_loop_init ();
 191   grub_help_init ();
 192   grub_halt_init ();
 193   grub_reboot_init ();
 194   grub_default_init ();
 195   grub_timeout_init ();
 196
 197   /* XXX: Should normal mode be started by default?  */
 198   grub_normal_init ();
 199
 200   /* Start GRUB!  */
 201   if (setjmp (main_env) == 0)
 202     grub_main ();
 203
 204   grub_timeout_fini ();
 205   grub_default_fini ();
 206   grub_reboot_fini ();
 207   grub_halt_fini ();
 208   grub_help_fini ();
 209   grub_loop_fini ();
 210   grub_util_biosdisk_fini ();
 211   grub_normal_fini ();
 212   grub_ufs_fini ();
 213   grub_ext2_fini ();
 214   grub_minix_fini ();
 215   grub_hfs_fini ();
 216   grub_jfs_fini ();
 217   grub_fat_fini ();
 218   grub_boot_fini ();
 219   grub_cmp_fini ();
 220   grub_cat_fini ();
 221   grub_terminal_fini ();
 222   grub_amiga_partition_map_fini ();
 223   grub_pc_partition_map_fini ();
 224   grub_apple_partition_map_fini ();
 225   grub_sun_partition_map_fini ();
 226
 227   grub_machine_fini ();
 228
 229   return 0;
 230 }