160 lines
3.8 KiB
C
160 lines
3.8 KiB
C
/* testload.c - load the same file in multiple ways */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003,2005,2006,2007,2009,2010 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 <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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GRUB_MOD_LICENSE ("GPLv3+");
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static grub_err_t
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grub_cmd_testload (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;
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grub_size_t size;
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grub_off_t pos;
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auto void NESTED_FUNC_ATTR read_func (grub_disk_addr_t sector, unsigned offset, unsigned len);
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void NESTED_FUNC_ATTR read_func (grub_disk_addr_t 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_xputs (".");
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grub_refresh ();
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}
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if (argc < 1)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
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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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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 GRUB_ERR_NONE;
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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) != (grub_ssize_t) 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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grub_file_seek (file, 0);
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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 %lld\n", (unsigned long long) 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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if (pos >= GRUB_DISK_SECTOR_SIZE)
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pos -= GRUB_DISK_SECTOR_SIZE;
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else
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pos = 0;
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grub_file_seek (file, pos);
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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 %lld\n", (unsigned long long) pos);
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for (i = 0; i < GRUB_DISK_SECTOR_SIZE; i++)
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{
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grub_printf ("%02x ", buf[pos + i]);
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if ((i & 15) == 15)
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grub_printf ("\n");
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}
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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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return GRUB_ERR_NONE;
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fail:
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grub_file_close (file);
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grub_free (buf);
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if (!grub_errno)
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grub_error (GRUB_ERR_IO, "bad read");
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return grub_errno;
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}
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static grub_command_t cmd;
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GRUB_MOD_INIT(testload)
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{
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cmd =
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grub_register_command ("testload", grub_cmd_testload,
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N_("FILE"),
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N_("Load the same file in multiple ways."));
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}
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GRUB_MOD_FINI(testload)
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{
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grub_unregister_command (cmd);
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}
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