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BVK Chaitanya
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265d68cd10
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8c41176882
810 changed files with 4980 additions and 2508 deletions
391
grub-core/commands/minicmd.c
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391
grub-core/commands/minicmd.c
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/* minicmd.c - commands for the rescue mode */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003,2005,2006,2007,2009 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 <grub/dl.h>
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#include <grub/mm.h>
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#include <grub/err.h>
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#include <grub/env.h>
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#include <grub/misc.h>
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#include <grub/file.h>
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#include <grub/disk.h>
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#include <grub/term.h>
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#include <grub/loader.h>
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#include <grub/command.h>
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#include <grub/i18n.h>
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/* cat FILE */
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static grub_err_t
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grub_mini_cmd_cat (struct grub_command *cmd __attribute__ ((unused)),
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int argc, char *argv[])
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{
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grub_file_t file;
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char buf[GRUB_DISK_SECTOR_SIZE];
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grub_ssize_t size;
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if (argc < 1)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "no file specified");
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file = grub_file_open (argv[0]);
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if (! file)
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return grub_errno;
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while ((size = grub_file_read (file, buf, sizeof (buf))) > 0)
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{
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int i;
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for (i = 0; i < size; i++)
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{
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unsigned char c = buf[i];
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if ((grub_isprint (c) || grub_isspace (c)) && c != '\r')
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grub_putchar (c);
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else
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{
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grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT);
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grub_printf ("<%x>", (int) c);
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grub_setcolorstate (GRUB_TERM_COLOR_STANDARD);
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}
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}
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}
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grub_putchar ('\n');
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grub_refresh ();
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grub_file_close (file);
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return 0;
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}
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/* help */
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static grub_err_t
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grub_mini_cmd_help (struct grub_command *cmd __attribute__ ((unused)),
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int argc __attribute__ ((unused)),
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char *argv[] __attribute__ ((unused)))
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{
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grub_command_t p;
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for (p = grub_command_list; p; p = p->next)
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grub_printf ("%s (%d%c)\t%s\n", p->name,
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p->prio & GRUB_PRIO_LIST_PRIO_MASK,
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(p->prio & GRUB_PRIO_LIST_FLAG_ACTIVE) ? '+' : '-',
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p->description);
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return 0;
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}
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#if 0
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static void
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grub_rescue_cmd_info (void)
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{
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extern void grub_disk_cache_get_performance (unsigned long *,
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unsigned long *);
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unsigned long hits, misses;
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grub_disk_cache_get_performance (&hits, &misses);
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grub_printf ("Disk cache: hits = %u, misses = %u ", hits, misses);
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if (hits + misses)
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{
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unsigned long ratio = hits * 10000 / (hits + misses);
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grub_printf ("(%u.%u%%)\n", ratio / 100, ratio % 100);
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}
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else
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grub_printf ("(N/A)\n");
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}
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#endif
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/* root [DEVICE] */
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static grub_err_t
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grub_mini_cmd_root (struct grub_command *cmd __attribute__ ((unused)),
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int argc, char *argv[])
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{
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grub_device_t dev;
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grub_fs_t fs;
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if (argc > 0)
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{
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char *device_name = grub_file_get_device_name (argv[0]);
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if (! device_name)
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return grub_errno;
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grub_env_set ("root", device_name);
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grub_free (device_name);
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}
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dev = grub_device_open (0);
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if (! dev)
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return grub_errno;
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fs = grub_fs_probe (dev);
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if (grub_errno == GRUB_ERR_UNKNOWN_FS)
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grub_errno = GRUB_ERR_NONE;
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grub_printf ("(%s): Filesystem is %s.\n",
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grub_env_get ("root"), fs ? fs->name : "unknown");
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grub_device_close (dev);
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return 0;
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}
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#if 0
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static void
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grub_rescue_cmd_testload (int argc, char *argv[])
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{
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grub_file_t file;
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char *buf;
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grub_ssize_t size;
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grub_ssize_t pos;
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auto void read_func (unsigned long sector, unsigned offset, unsigned len);
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void read_func (unsigned long sector __attribute__ ((unused)),
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unsigned offset __attribute__ ((unused)),
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unsigned len __attribute__ ((unused)))
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{
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grub_putchar ('.');
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grub_refresh ();
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}
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if (argc < 1)
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{
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grub_error (GRUB_ERR_BAD_ARGUMENT, "no file specified");
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return;
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}
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file = grub_file_open (argv[0]);
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if (! file)
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return;
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size = grub_file_size (file) & ~(GRUB_DISK_SECTOR_SIZE - 1);
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if (size == 0)
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{
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grub_file_close (file);
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return;
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}
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buf = grub_malloc (size);
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if (! buf)
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goto fail;
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grub_printf ("Reading %s sequentially", argv[0]);
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file->read_hook = read_func;
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if (grub_file_read (file, buf, size) != size)
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goto fail;
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grub_printf (" Done.\n");
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/* Read sequentially again. */
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grub_printf ("Reading %s sequentially again", argv[0]);
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if (grub_file_seek (file, 0) < 0)
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goto fail;
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for (pos = 0; pos < size; pos += GRUB_DISK_SECTOR_SIZE)
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{
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char sector[GRUB_DISK_SECTOR_SIZE];
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if (grub_file_read (file, sector, GRUB_DISK_SECTOR_SIZE)
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!= GRUB_DISK_SECTOR_SIZE)
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goto fail;
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if (grub_memcmp (sector, buf + pos, GRUB_DISK_SECTOR_SIZE) != 0)
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{
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grub_printf ("\nDiffers in %d\n", pos);
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goto fail;
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}
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}
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grub_printf (" Done.\n");
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/* Read backwards and compare. */
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grub_printf ("Reading %s backwards", argv[0]);
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pos = size;
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while (pos > 0)
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{
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char sector[GRUB_DISK_SECTOR_SIZE];
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pos -= GRUB_DISK_SECTOR_SIZE;
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if (grub_file_seek (file, pos) < 0)
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goto fail;
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if (grub_file_read (file, sector, GRUB_DISK_SECTOR_SIZE)
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!= GRUB_DISK_SECTOR_SIZE)
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goto fail;
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if (grub_memcmp (sector, buf + pos, GRUB_DISK_SECTOR_SIZE) != 0)
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{
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int i;
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grub_printf ("\nDiffers in %d\n", pos);
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for (i = 0; i < GRUB_DISK_SECTOR_SIZE; i++)
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grub_putchar (buf[pos + i]);
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if (i)
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grub_refresh ();
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goto fail;
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}
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}
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grub_printf (" Done.\n");
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fail:
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grub_file_close (file);
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grub_free (buf);
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}
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#endif
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/* dump ADDRESS [SIZE] */
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static grub_err_t
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grub_mini_cmd_dump (struct grub_command *cmd __attribute__ ((unused)),
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int argc, char *argv[])
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{
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grub_uint8_t *addr;
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grub_size_t size = 4;
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if (argc == 0)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "no address specified");
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addr = (grub_uint8_t *) grub_strtoul (argv[0], 0, 0);
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if (grub_errno)
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return grub_errno;
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if (argc > 1)
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size = (grub_size_t) grub_strtoul (argv[1], 0, 0);
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while (size--)
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{
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grub_printf ("%x%x ", *addr >> 4, *addr & 0xf);
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addr++;
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}
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return 0;
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}
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/* rmmod MODULE */
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static grub_err_t
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grub_mini_cmd_rmmod (struct grub_command *cmd __attribute__ ((unused)),
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int argc, char *argv[])
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{
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grub_dl_t mod;
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if (argc == 0)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "no module specified");
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mod = grub_dl_get (argv[0]);
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if (! mod)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "no such module");
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if (grub_dl_unref (mod) <= 0)
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grub_dl_unload (mod);
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return 0;
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}
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/* lsmod */
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static grub_err_t
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grub_mini_cmd_lsmod (struct grub_command *cmd __attribute__ ((unused)),
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int argc __attribute__ ((unused)),
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char *argv[] __attribute__ ((unused)))
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{
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auto int print_module (grub_dl_t mod);
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int print_module (grub_dl_t mod)
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{
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grub_dl_dep_t dep;
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grub_printf ("%s\t%d\t\t", mod->name, mod->ref_count);
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for (dep = mod->dep; dep; dep = dep->next)
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{
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if (dep != mod->dep)
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grub_putchar (',');
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grub_printf ("%s", dep->mod->name);
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}
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grub_putchar ('\n');
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return 0;
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}
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grub_printf ("Name\tRef Count\tDependencies\n");
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grub_dl_iterate (print_module);
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return 0;
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}
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/* exit */
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static grub_err_t
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grub_mini_cmd_exit (struct grub_command *cmd __attribute__ ((unused)),
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int argc __attribute__ ((unused)),
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char *argv[] __attribute__ ((unused)))
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{
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grub_exit ();
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return 0;
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}
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/* clear */
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static grub_err_t
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grub_mini_cmd_clear (struct grub_command *cmd __attribute__ ((unused)),
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int argc __attribute__ ((unused)),
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char *argv[] __attribute__ ((unused)))
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{
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grub_cls ();
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return 0;
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}
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static grub_command_t cmd_cat, cmd_help, cmd_root;
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static grub_command_t cmd_dump, cmd_rmmod, cmd_lsmod, cmd_exit;
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static grub_command_t cmd_clear;
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GRUB_MOD_INIT(minicmd)
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{
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cmd_cat =
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grub_register_command ("cat", grub_mini_cmd_cat,
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N_("FILE"), N_("Show the contents of a file."));
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cmd_help =
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grub_register_command ("help", grub_mini_cmd_help,
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0, N_("Show this message."));
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cmd_root =
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grub_register_command ("root", grub_mini_cmd_root,
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N_("[DEVICE]"), N_("Set the root device."));
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cmd_dump =
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grub_register_command ("dump", grub_mini_cmd_dump,
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N_("ADDR"), N_("Dump memory."));
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cmd_rmmod =
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grub_register_command ("rmmod", grub_mini_cmd_rmmod,
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N_("MODULE"), N_("Remove a module."));
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cmd_lsmod =
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grub_register_command ("lsmod", grub_mini_cmd_lsmod,
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0, N_("Show loaded modules."));
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cmd_exit =
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grub_register_command ("exit", grub_mini_cmd_exit,
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0, N_("Exit from GRUB."));
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cmd_clear =
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grub_register_command ("clear", grub_mini_cmd_clear,
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0, N_("Clear the screen."));
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}
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GRUB_MOD_FINI(minicmd)
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{
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grub_unregister_command (cmd_cat);
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grub_unregister_command (cmd_help);
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grub_unregister_command (cmd_root);
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grub_unregister_command (cmd_dump);
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grub_unregister_command (cmd_rmmod);
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grub_unregister_command (cmd_lsmod);
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grub_unregister_command (cmd_exit);
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grub_unregister_command (cmd_clear);
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}
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