1 /* testload.c - load the same file in multiple ways */
3 * GRUB -- GRand Unified Bootloader
4 * Copyright (C) 2003,2005,2006,2007,2009,2010 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/>.
24 #include <grub/misc.h>
25 #include <grub/file.h>
26 #include <grub/disk.h>
27 #include <grub/term.h>
28 #include <grub/loader.h>
29 #include <grub/command.h>
30 #include <grub/i18n.h>
32 GRUB_MOD_LICENSE ("GPLv3+");
35 grub_cmd_testload (struct grub_command
*cmd
__attribute__ ((unused
)),
36 int argc
, char *argv
[])
42 auto void NESTED_FUNC_ATTR
read_func (grub_disk_addr_t sector
, unsigned offset
, unsigned len
);
44 void NESTED_FUNC_ATTR
read_func (grub_disk_addr_t sector
__attribute__ ((unused
)),
45 unsigned offset
__attribute__ ((unused
)),
46 unsigned len
__attribute__ ((unused
)))
53 return grub_error (GRUB_ERR_BAD_ARGUMENT
, N_("filename expected"));
55 file
= grub_file_open (argv
[0]);
59 size
= grub_file_size (file
) & ~(GRUB_DISK_SECTOR_SIZE
- 1);
62 grub_file_close (file
);
66 buf
= grub_malloc (size
);
70 grub_printf ("Reading %s sequentially", argv
[0]);
71 file
->read_hook
= read_func
;
72 if (grub_file_read (file
, buf
, size
) != (grub_ssize_t
) size
)
74 grub_printf (" Done.\n");
76 /* Read sequentially again. */
77 grub_printf ("Reading %s sequentially again", argv
[0]);
78 grub_file_seek (file
, 0);
80 for (pos
= 0; pos
< size
;)
82 char sector
[GRUB_DISK_SECTOR_SIZE
];
83 grub_size_t curlen
= GRUB_DISK_SECTOR_SIZE
;
85 if (curlen
> size
- pos
)
88 if (grub_file_read (file
, sector
, curlen
)
89 != (grub_ssize_t
) curlen
)
92 if (grub_memcmp (sector
, buf
+ pos
, curlen
) != 0)
94 grub_printf ("\nDiffers in %lld\n", (unsigned long long) pos
);
99 grub_printf (" Done.\n");
101 /* Read backwards and compare. */
102 grub_printf ("Reading %s backwards", argv
[0]);
106 char sector
[GRUB_DISK_SECTOR_SIZE
];
108 if (pos
>= GRUB_DISK_SECTOR_SIZE
)
109 pos
-= GRUB_DISK_SECTOR_SIZE
;
113 grub_file_seek (file
, pos
);
115 if (grub_file_read (file
, sector
, GRUB_DISK_SECTOR_SIZE
)
116 != GRUB_DISK_SECTOR_SIZE
)
119 if (grub_memcmp (sector
, buf
+ pos
, GRUB_DISK_SECTOR_SIZE
) != 0)
123 grub_printf ("\nDiffers in %lld\n", (unsigned long long) pos
);
125 for (i
= 0; i
< GRUB_DISK_SECTOR_SIZE
; i
++)
127 grub_printf ("%02x ", buf
[pos
+ i
]);
138 grub_printf (" Done.\n");
140 return GRUB_ERR_NONE
;
144 grub_file_close (file
);
148 grub_error (GRUB_ERR_IO
, "bad read");
152 static grub_command_t cmd
;
154 GRUB_MOD_INIT(testload
)
157 grub_register_command ("testload", grub_cmd_testload
,
159 N_("Load the same file in multiple ways."));
162 GRUB_MOD_FINI(testload
)
164 grub_unregister_command (cmd
);