1 /* crc.c - command to calculate the crc32 checksum of a file */
3 * GRUB -- GRand Unified Bootloader
4 * Copyright (C) 2008 Free Software Foundation, Inc.
6 * GRUB is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * GRUB is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
20 #include <grub/normal.h>
23 #include <grub/disk.h>
24 #include <grub/file.h>
25 #include <grub/misc.h>
26 #include <grub/lib/crc.h>
29 grub_cmd_crc (struct grub_arg_list
*state
__attribute__ ((unused
)),
30 int argc
, char **args
)
34 char buf
[GRUB_DISK_SECTOR_SIZE
];
39 return grub_error (GRUB_ERR_BAD_ARGUMENT
, "file name required");
41 file
= grub_file_open (args
[0]);
46 while ((size
= grub_file_read (file
, buf
, sizeof (buf
))) > 0)
47 crc
= grub_getcrc32 (crc
, buf
, size
);
49 grub_file_close (file
);
51 grub_printf ("%08x\n", crc
);
58 (void) mod
; /* To stop warning. */
59 grub_register_command ("crc", grub_cmd_crc
, GRUB_COMMAND_FLAG_BOTH
,
60 "crc FILE", "Calculate the crc32 checksum of a file.", 0);
65 grub_unregister_command ("crc");