2N/A/* testload.c - load the same file in multiple ways */
2N/A/*
2N/A * GRUB -- GRand Unified Bootloader
2N/A * Copyright (C) 2003,2005,2006,2007,2009,2010 Free Software Foundation, Inc.
2N/A *
2N/A * GRUB is free software: you can redistribute it and/or modify
2N/A * it under the terms of the GNU General Public License as published by
2N/A * the Free Software Foundation, either version 3 of the License, or
2N/A * (at your option) any later version.
2N/A *
2N/A * GRUB is distributed in the hope that it will be useful,
2N/A * but WITHOUT ANY WARRANTY; without even the implied warranty of
2N/A * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2N/A * GNU General Public License for more details.
2N/A *
2N/A * You should have received a copy of the GNU General Public License
2N/A * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
2N/A */
2N/A
2N/A#include <grub/dl.h>
2N/A#include <grub/mm.h>
2N/A#include <grub/err.h>
2N/A#include <grub/env.h>
2N/A#include <grub/misc.h>
2N/A#include <grub/file.h>
2N/A#include <grub/disk.h>
2N/A#include <grub/term.h>
2N/A#include <grub/loader.h>
2N/A#include <grub/command.h>
2N/A#include <grub/i18n.h>
2N/A
2N/AGRUB_MOD_LICENSE ("GPLv3+");
2N/A
2N/Astatic grub_err_t
2N/Agrub_cmd_testload (struct grub_command *cmd __attribute__ ((unused)),
2N/A int argc, char *argv[])
2N/A{
2N/A grub_file_t file;
2N/A char *buf;
2N/A grub_size_t size;
2N/A grub_off_t pos;
2N/A auto void NESTED_FUNC_ATTR read_func (grub_disk_addr_t sector, unsigned offset, unsigned len);
2N/A
2N/A void NESTED_FUNC_ATTR read_func (grub_disk_addr_t sector __attribute__ ((unused)),
2N/A unsigned offset __attribute__ ((unused)),
2N/A unsigned len __attribute__ ((unused)))
2N/A {
2N/A grub_xputs (".");
2N/A grub_refresh ();
2N/A }
2N/A
2N/A if (argc < 1)
2N/A return grub_error (GRUB_ERR_BAD_ARGUMENT, "no file specified");
2N/A
2N/A file = grub_file_open (argv[0]);
2N/A if (! file)
2N/A return grub_errno;
2N/A
2N/A size = grub_file_size (file) & ~(GRUB_DISK_SECTOR_SIZE - 1);
2N/A if (size == 0)
2N/A {
2N/A grub_file_close (file);
2N/A return GRUB_ERR_NONE;
2N/A }
2N/A
2N/A buf = grub_malloc (size);
2N/A if (! buf)
2N/A goto fail;
2N/A
2N/A grub_printf ("Reading %s sequentially", argv[0]);
2N/A file->read_hook = read_func;
2N/A if (grub_file_read (file, buf, size) != (grub_ssize_t) size)
2N/A goto fail;
2N/A grub_printf (" Done.\n");
2N/A
2N/A /* Read sequentially again. */
2N/A grub_printf ("Reading %s sequentially again", argv[0]);
2N/A grub_file_seek (file, 0);
2N/A
2N/A for (pos = 0; pos < size; pos += GRUB_DISK_SECTOR_SIZE)
2N/A {
2N/A char sector[GRUB_DISK_SECTOR_SIZE];
2N/A
2N/A if (grub_file_read (file, sector, GRUB_DISK_SECTOR_SIZE)
2N/A != GRUB_DISK_SECTOR_SIZE)
2N/A goto fail;
2N/A
2N/A if (grub_memcmp (sector, buf + pos, GRUB_DISK_SECTOR_SIZE) != 0)
2N/A {
2N/A grub_printf ("\nDiffers in %lld\n", (unsigned long long) pos);
2N/A goto fail;
2N/A }
2N/A }
2N/A grub_printf (" Done.\n");
2N/A
2N/A /* Read backwards and compare. */
2N/A grub_printf ("Reading %s backwards", argv[0]);
2N/A pos = size;
2N/A while (pos > 0)
2N/A {
2N/A char sector[GRUB_DISK_SECTOR_SIZE];
2N/A
2N/A pos -= GRUB_DISK_SECTOR_SIZE;
2N/A
2N/A grub_file_seek (file, pos);
2N/A
2N/A if (grub_file_read (file, sector, GRUB_DISK_SECTOR_SIZE)
2N/A != GRUB_DISK_SECTOR_SIZE)
2N/A goto fail;
2N/A
2N/A if (grub_memcmp (sector, buf + pos, GRUB_DISK_SECTOR_SIZE) != 0)
2N/A {
2N/A int i;
2N/A
2N/A grub_printf ("\nDiffers in %lld\n", (unsigned long long) pos);
2N/A
2N/A for (i = 0; i < GRUB_DISK_SECTOR_SIZE; i++)
2N/A {
2N/A grub_printf ("%02x ", buf[pos + i]);
2N/A if ((i & 15) == 15)
2N/A grub_printf ("\n");
2N/A }
2N/A
2N/A if (i)
2N/A grub_refresh ();
2N/A
2N/A goto fail;
2N/A }
2N/A }
2N/A grub_printf (" Done.\n");
2N/A
2N/A return GRUB_ERR_NONE;
2N/A
2N/A fail:
2N/A
2N/A grub_file_close (file);
2N/A grub_free (buf);
2N/A
2N/A if (!grub_errno)
2N/A grub_error (GRUB_ERR_IO, "bad read");
2N/A return grub_errno;
2N/A}
2N/A
2N/Astatic grub_command_t cmd;
2N/A
2N/AGRUB_MOD_INIT(testload)
2N/A{
2N/A cmd =
2N/A grub_register_command ("testload", grub_cmd_testload,
2N/A N_("FILE"),
2N/A N_("Load the same file in multiple ways."));
2N/A}
2N/A
2N/AGRUB_MOD_FINI(testload)
2N/A{
2N/A grub_unregister_command (cmd);
2N/A}