/* blocklist.c - print the block list of a file */ /* * GRUB -- GRand Unified Bootloader * Copyright (C) 2006,2007 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 <grub/dl.h> #include <grub/misc.h> #include <grub/file.h> #include <grub/mm.h> #include <grub/disk.h> #include <grub/partition.h> #include <grub/command.h> #include <grub/i18n.h> static grub_err_t grub_cmd_blocklist (grub_command_t cmd __attribute__ ((unused)), int argc, char **args) { grub_file_t file; char buf[GRUB_DISK_SECTOR_SIZE]; unsigned long start_sector = 0; unsigned num_sectors = 0; int num_entries = 0; grub_disk_addr_t part_start = 0; auto void NESTED_FUNC_ATTR read_blocklist (grub_disk_addr_t sector, unsigned offset, unsigned length); auto void NESTED_FUNC_ATTR print_blocklist (grub_disk_addr_t sector, unsigned num, unsigned offset, unsigned length); void NESTED_FUNC_ATTR read_blocklist (grub_disk_addr_t sector, unsigned offset, unsigned length) { if (num_sectors > 0) { if (start_sector + num_sectors == sector && offset == 0 && length == GRUB_DISK_SECTOR_SIZE) { num_sectors++; return; } print_blocklist (start_sector, num_sectors, 0, 0); num_sectors = 0; } if (offset == 0 && length == GRUB_DISK_SECTOR_SIZE) { start_sector = sector; num_sectors++; } else print_blocklist (sector, 0, offset, length); } void NESTED_FUNC_ATTR print_blocklist (grub_disk_addr_t sector, unsigned num, unsigned offset, unsigned length) { if (num_entries++) grub_printf (","); grub_printf ("%llu", (unsigned long long) (sector - part_start)); if (num > 0) grub_printf ("+%u", num); if (offset != 0 || length != 0) grub_printf ("[%u-%u]", offset, offset + length); } if (argc < 1) return grub_error (GRUB_ERR_BAD_ARGUMENT, "no file specified"); grub_file_filter_disable_compression (); file = grub_file_open (args[0]); if (! file) return grub_errno; if (! file->device->disk) return grub_error (GRUB_ERR_BAD_DEVICE, "this command is available only for disk devices"); part_start = grub_partition_get_start (file->device->disk->partition); file->read_hook = read_blocklist; while (grub_file_read (file, buf, sizeof (buf)) > 0) ; if (num_sectors > 0) print_blocklist (start_sector, num_sectors, 0, 0); grub_file_close (file); return grub_errno; } static grub_command_t cmd; GRUB_MOD_INIT(blocklist) { cmd = grub_register_command ("blocklist", grub_cmd_blocklist, N_("FILE"), N_("Print a block list.")); } GRUB_MOD_FINI(blocklist) { grub_unregister_command (cmd); }