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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2003,2004,2005,2006,2007,2008 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <sys/stat.h>
#include <getopt.h>
#include <string.h>
#include <signal.h>
#include <sys/types.h>
#include <unistd.h>
#include <grub/mm.h>
#include <grub/setjmp.h>
#include <grub/fs.h>
#include <grub/util/hostdisk.h>
#include <grub/dl.h>
#include <grub/util/console.h>
#include <grub/util/misc.h>
#include <grub/kernel.h>
#include <grub/normal.h>
#include <grub/util/getroot.h>
#include <grub/env.h>
#include <grub/partition.h>
#include <grub_emu_init.h>
/* Used for going back to the main function. */
static jmp_buf main_env;
/* Store the prefix specified by an argument. */
static char *prefix = 0;
grub_addr_t
grub_arch_modules_addr (void)
{
return 0;
}
grub_err_t
grub_arch_dl_check_header (void *ehdr)
{
(void) ehdr;
return GRUB_ERR_BAD_MODULE;
}
grub_err_t
grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
{
(void) mod;
(void) ehdr;
return GRUB_ERR_BAD_MODULE;
}
void
grub_reboot (void)
{
longjmp (main_env, 1);
}
void
grub_halt (
#ifdef GRUB_MACHINE_PCBIOS
int no_apm __attribute__ ((unused))
#endif
)
{
grub_reboot ();
}
void
grub_machine_init (void)
{
}
void
grub_machine_set_prefix (void)
{
grub_env_set ("prefix", prefix);
free (prefix);
prefix = 0;
}
void
grub_machine_fini (void)
{
grub_console_fini ();
}
void
read_command_list (void)
{
}
static struct option options[] =
{
{"root-device", required_argument, 0, 'r'},
{"device-map", required_argument, 0, 'm'},
{"directory", required_argument, 0, 'd'},
{"hold", optional_argument, 0, 'H'},
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
{"verbose", no_argument, 0, 'v'},
{ 0, 0, 0, 0 }
};
static int
usage (int status)
{
if (status)
fprintf (stderr,
"Try ``grub-emu --help'' for more information.\n");
else
printf (
"Usage: grub-emu [OPTION]...\n"
"\n"
"GRUB emulator.\n"
"\n"
" -r, --root-device=DEV use DEV as the root device [default=guessed]\n"
" -m, --device-map=FILE use FILE as the device map [default=%s]\n"
" -d, --directory=DIR use GRUB files in the directory DIR [default=%s]\n"
" -v, --verbose print verbose messages\n"
" -H, --hold[=SECONDS] wait until a debugger will attach\n"
" -h, --help display this message and exit\n"
" -V, --version print version information and exit\n"
"\n"
"Report bugs to <%s>.\n", DEFAULT_DEVICE_MAP, DEFAULT_DIRECTORY, PACKAGE_BUGREPORT);
return status;
}
int
main (int argc, char *argv[])
{
char *root_dev = 0;
char *dir = DEFAULT_DIRECTORY;
char *dev_map = DEFAULT_DEVICE_MAP;
volatile int hold = 0;
int opt;
progname = "grub-emu";
while ((opt = getopt_long (argc, argv, "r:d:m:vH:hV", options, 0)) != -1)
switch (opt)
{
case 'r':
root_dev = optarg;
break;
case 'd':
dir = optarg;
break;
case 'm':
dev_map = optarg;
break;
case 'v':
verbosity++;
break;
case 'H':
hold = (optarg ? atoi (optarg) : -1);
break;
case 'h':
return usage (0);
case 'V':
printf ("%s (%s) %s\n", progname, PACKAGE_NAME, PACKAGE_VERSION);
return 0;
default:
return usage (1);
}
if (optind < argc)
{
fprintf (stderr, "Unknown extra argument `%s'.\n", argv[optind]);
return usage (1);
}
/* Wait until the ARGS.HOLD variable is cleared by an attached debugger. */
if (hold && verbosity > 0)
printf ("Run \"gdb %s %d\", and set ARGS.HOLD to zero.\n",
progname, (int) getpid ());
while (hold)
{
if (hold > 0)
hold--;
sleep (1);
}
signal (SIGINT, SIG_IGN);
grub_console_init ();
/* XXX: This is a bit unportable. */
grub_util_biosdisk_init (dev_map);
grub_init_all ();
/* Make sure that there is a root device. */
if (! root_dev)
{
char *device_name = grub_guess_root_device (dir);
if (! device_name)
grub_util_error ("cannot find a device for %s.\n", dir);
root_dev = grub_util_get_grub_dev (device_name);
if (! root_dev)
{
grub_util_info ("guessing the root device failed, because of `%s'",
grub_errmsg);
grub_util_error ("Cannot guess the root device. Specify the option ``--root-device''.");
}
}
dir = grub_get_prefix (dir);
prefix = xmalloc (strlen (root_dev) + 2 + strlen (dir) + 1);
sprintf (prefix, "(%s)%s", root_dev, dir);
free (dir);
/* Start GRUB! */
if (setjmp (main_env) == 0)
grub_main ();
grub_fini_all ();
grub_machine_fini ();
return 0;
}
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