diff options
Diffstat (limited to 'grub-core/osdep/generic/blocklist.c')
| -rw-r--r-- | grub-core/osdep/generic/blocklist.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/grub-core/osdep/generic/blocklist.c b/grub-core/osdep/generic/blocklist.c new file mode 100644 index 0000000..2d90403 --- /dev/null +++ b/grub-core/osdep/generic/blocklist.c @@ -0,0 +1,132 @@ +/* grub-setup.c - make GRUB usable */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011 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 <config.h> + +#include <grub/disk.h> +#include <grub/file.h> +#include <grub/partition.h> +#include <grub/util/misc.h> +#include <grub/util/install.h> +#include <grub/emu/hostdisk.h> + +#include <string.h> + +#define MAX_TRIES 5 + +void +grub_install_get_blocklist (grub_device_t root_dev, + const char *core_path, const char *core_img, + size_t core_size, + void (*callback) (grub_disk_addr_t sector, + unsigned offset, + unsigned length, + void *data), + void *hook_data) +{ + int i; + char *tmp_img; + char *core_path_dev; + + core_path_dev = grub_make_system_path_relative_to_its_root (core_path); + + /* Make sure that GRUB reads the identical image as the OS. */ + tmp_img = xmalloc (core_size); + + for (i = 0; i < MAX_TRIES; i++) + { + grub_file_t file; + + grub_util_info ((i == 0) ? _("attempting to read the core image `%s' from GRUB") + : _("attempting to read the core image `%s' from GRUB again"), + core_path_dev); + + grub_disk_cache_invalidate_all (); + + file = grub_file_open (core_path_dev, GRUB_FILE_TYPE_NONE | GRUB_FILE_TYPE_NO_DECOMPRESS); + if (file) + { + if (grub_file_size (file) != core_size) + grub_util_info ("succeeded in opening the core image but the size is different (%d != %d)", + (int) grub_file_size (file), (int) core_size); + else if (grub_file_read (file, tmp_img, core_size) + != (grub_ssize_t) core_size) + grub_util_info ("succeeded in opening the core image but cannot read %d bytes", + (int) core_size); + else if (memcmp (core_img, tmp_img, core_size) != 0) + { +#if 0 + FILE *dump; + FILE *dump2; + + dump = fopen ("dump.img", "wb"); + if (dump) + { + fwrite (tmp_img, 1, core_size, dump); + fclose (dump); + } + + dump2 = fopen ("dump2.img", "wb"); + if (dump2) + { + fwrite (core_img, 1, core_size, dump2); + fclose (dump2); + } + +#endif + grub_util_info ("succeeded in opening the core image but the data is different"); + } + else + { + grub_file_close (file); + break; + } + + grub_file_close (file); + } + else + grub_util_info ("couldn't open the core image"); + + if (grub_errno) + grub_util_info ("error message = %s", grub_errmsg); + + grub_errno = GRUB_ERR_NONE; + grub_util_biosdisk_flush (root_dev->disk); + sleep (1); + } + + if (i == MAX_TRIES) + grub_util_error (_("cannot read `%s' correctly"), core_path_dev); + + grub_file_t file; + /* Now read the core image to determine where the sectors are. */ + file = grub_file_open (core_path_dev, GRUB_FILE_TYPE_NONE | GRUB_FILE_TYPE_NO_DECOMPRESS); + if (! file) + grub_util_error ("%s", grub_errmsg); + + file->read_hook = callback; + file->read_hook_data = hook_data; + if (grub_file_read (file, tmp_img, core_size) != (grub_ssize_t) core_size) + grub_util_error ("%s", _("failed to read the sectors of the core image")); + + grub_file_close (file); + free (tmp_img); + + free (core_path_dev); +} |