296 lines
6.2 KiB
C
296 lines
6.2 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003,2004,2005,2006,2007,2008,2009,2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <time.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <setjmp.h>
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#include <sys/stat.h>
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#include <getopt.h>
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#include <string.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <grub/dl.h>
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#include <grub/mm.h>
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#include <grub/setjmp.h>
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#include <grub/fs.h>
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#include <grub/emu/hostdisk.h>
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#include <grub/time.h>
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#include <grub/emu/console.h>
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#include <grub/emu/misc.h>
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#include <grub/kernel.h>
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#include <grub/normal.h>
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#include <grub/emu/getroot.h>
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#include <grub/env.h>
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#include <grub/partition.h>
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#include <grub/i18n.h>
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#define ENABLE_RELOCATABLE 0
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#include "progname.h"
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/* Used for going back to the main function. */
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static jmp_buf main_env;
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/* Store the prefix specified by an argument. */
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static char *prefix = NULL;
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grub_addr_t
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grub_arch_modules_addr (void)
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{
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return 0;
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}
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#if GRUB_NO_MODULES
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grub_err_t
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grub_arch_dl_check_header (void *ehdr)
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{
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(void) ehdr;
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return GRUB_ERR_BAD_MODULE;
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}
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grub_err_t
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grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr)
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{
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(void) mod;
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(void) ehdr;
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return GRUB_ERR_BAD_MODULE;
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}
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#endif
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void
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grub_reboot (void)
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{
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longjmp (main_env, 1);
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}
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void
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grub_halt (
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#ifdef GRUB_MACHINE_PCBIOS
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int no_apm __attribute__ ((unused))
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#endif
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)
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{
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grub_reboot ();
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}
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void
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grub_machine_init (void)
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{
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}
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void
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grub_machine_set_prefix (void)
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{
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grub_env_set ("prefix", prefix);
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free (prefix);
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prefix = 0;
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}
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void
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grub_machine_fini (void)
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{
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grub_console_fini ();
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}
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static struct option options[] =
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{
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{"root-device", required_argument, 0, 'r'},
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{"device-map", required_argument, 0, 'm'},
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{"directory", required_argument, 0, 'd'},
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{"hold", optional_argument, 0, 'H'},
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{"help", no_argument, 0, 'h'},
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{"version", no_argument, 0, 'V'},
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{"verbose", no_argument, 0, 'v'},
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{ 0, 0, 0, 0 }
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};
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static int
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usage (int status)
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{
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if (status)
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fprintf (stderr,
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"Try `%s --help' for more information.\n", program_name);
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else
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printf (
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"Usage: %s [OPTION]...\n"
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"\n"
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"GRUB emulator.\n"
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"\n"
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" -r, --root-device=DEV use DEV as the root device [default=guessed]\n"
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" -m, --device-map=FILE use FILE as the device map [default=%s]\n"
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" -d, --directory=DIR use GRUB files in the directory DIR [default=%s]\n"
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" -v, --verbose print verbose messages\n"
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" -H, --hold[=SECONDS] wait until a debugger will attach\n"
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" -h, --help display this message and exit\n"
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" -V, --version print version information and exit\n"
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"\n"
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"Report bugs to <%s>.\n", program_name, DEFAULT_DEVICE_MAP, DEFAULT_DIRECTORY, PACKAGE_BUGREPORT);
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return status;
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}
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void grub_hostfs_init (void);
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void grub_hostfs_fini (void);
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void grub_host_init (void);
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void grub_host_fini (void);
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#if GRUB_NO_MODULES
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void grub_init_all (void);
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void grub_fini_all (void);
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#endif
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int
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main (int argc, char *argv[])
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{
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char *root_dev = 0;
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char *dir = DEFAULT_DIRECTORY;
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char *dev_map = DEFAULT_DEVICE_MAP;
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volatile int hold = 0;
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int opt;
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set_program_name (argv[0]);
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while ((opt = getopt_long (argc, argv, "r:d:m:vH:hV", options, 0)) != -1)
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switch (opt)
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{
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case 'r':
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root_dev = optarg;
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break;
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case 'd':
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dir = optarg;
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break;
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case 'm':
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dev_map = optarg;
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break;
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case 'v':
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verbosity++;
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break;
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case 'H':
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hold = (optarg ? atoi (optarg) : -1);
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break;
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case 'h':
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return usage (0);
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case 'V':
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printf ("%s (%s) %s\n", program_name, PACKAGE_NAME, PACKAGE_VERSION);
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return 0;
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default:
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return usage (1);
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}
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if (optind < argc)
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{
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fprintf (stderr, "Unknown extra argument `%s'.\n", argv[optind]);
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return usage (1);
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}
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/* Wait until the ARGS.HOLD variable is cleared by an attached debugger. */
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if (hold && verbosity > 0)
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printf ("Run \"gdb %s %d\", and set ARGS.HOLD to zero.\n",
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program_name, (int) getpid ());
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while (hold)
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{
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if (hold > 0)
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hold--;
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sleep (1);
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}
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signal (SIGINT, SIG_IGN);
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grub_console_init ();
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grub_host_init ();
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grub_hostfs_init ();
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/* XXX: This is a bit unportable. */
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grub_util_biosdisk_init (dev_map);
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#if GRUB_NO_MODULES
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grub_init_all ();
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#endif
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/* Make sure that there is a root device. */
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if (! root_dev)
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{
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char *device_name = grub_guess_root_device (dir);
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if (! device_name)
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grub_util_error ("cannot find a device for %s", dir);
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root_dev = grub_util_get_grub_dev (device_name);
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if (! root_dev)
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{
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grub_util_info ("guessing the root device failed, because of `%s'",
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grub_errmsg);
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grub_util_error ("cannot guess the root device. Specify the option `--root-device'");
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}
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}
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if (strcmp (root_dev, "host") == 0)
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dir = xstrdup (dir);
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else
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dir = grub_make_system_path_relative_to_its_root (dir);
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prefix = xmalloc (strlen (root_dev) + 2 + strlen (dir) + 1);
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sprintf (prefix, "(%s)%s", root_dev, dir);
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free (dir);
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/* Start GRUB! */
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if (setjmp (main_env) == 0)
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grub_main ();
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#if GRUB_NO_MODULES
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grub_fini_all ();
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#endif
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grub_hostfs_fini ();
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grub_host_fini ();
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grub_machine_fini ();
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return 0;
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}
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#ifdef __MINGW32__
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void
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grub_millisleep (grub_uint32_t ms)
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{
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Sleep (ms);
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}
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#else
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void
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grub_millisleep (grub_uint32_t ms)
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{
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struct timespec ts;
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ts.tv_sec = ms / 1000;
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ts.tv_nsec = (ms % 1000) * 1000000;
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nanosleep (&ts, NULL);
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}
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#endif
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#if GRUB_NO_MODULES
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void
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grub_register_exported_symbols (void)
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{
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}
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#endif
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