1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/*
* Copyright (c) 2011 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program 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.
*
*/
/*
* Memory Functions
*
* Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
*/
#include <common.h>
#include <command.h>
#include <init.h>
#include <driver.h>
#include <malloc.h>
#include <errno.h>
#include <fs.h>
#include <libfile.h>
#include <fcntl.h>
#include <getopt.h>
#include <linux/stat.h>
#include <xfuncs.h>
static int do_memcmp(int argc, char *argv[])
{
loff_t count;
int sourcefd, destfd;
char *buf, *source_data, *dest_data;
int ret = 1;
int offset = 0;
if (memcpy_parse_options(argc, argv, &sourcefd, &destfd, &count,
O_RWSIZE_1, O_RDONLY) < 0)
return 1;
buf = xmalloc(RW_BUF_SIZE + RW_BUF_SIZE);
source_data = buf;
dest_data = buf + RW_BUF_SIZE;
while (count > 0) {
int now, r1, r2, i;
now = min((loff_t)RW_BUF_SIZE, count);
r1 = read_full(sourcefd, source_data, now);
if (r1 < 0) {
perror("read");
goto out;
}
r2 = read_full(destfd, dest_data, now);
if (r2 < 0) {
perror("read");
goto out;
}
if (r1 != now || r2 != now) {
printf("regions differ in size\n");
goto out;
}
for (i = 0; i < now; i++) {
if (source_data[i] != dest_data[i]) {
printf("files differ at offset %d\n", offset);
goto out;
}
offset++;
}
count -= now;
}
printf("OK\n");
ret = 0;
out:
close(sourcefd);
close(destfd);
free(buf);
return ret;
}
BAREBOX_CMD_HELP_START(memcmp)
BAREBOX_CMD_HELP_TEXT("Compare memory regions specified with ADDR1 and ADDR2")
BAREBOX_CMD_HELP_TEXT("of size COUNT bytes. If source is a file, COUNT can")
BAREBOX_CMD_HELP_TEXT("be left unspecified, in which case the whole file is")
BAREBOX_CMD_HELP_TEXT("compared.")
BAREBOX_CMD_HELP_TEXT("")
BAREBOX_CMD_HELP_TEXT("Options:")
BAREBOX_CMD_HELP_OPT ("-b", "byte access")
BAREBOX_CMD_HELP_OPT ("-w", "word access (16 bit)")
BAREBOX_CMD_HELP_OPT ("-l", "long access (32 bit)")
BAREBOX_CMD_HELP_OPT ("-q", "quad access (64 bit)")
BAREBOX_CMD_HELP_OPT ("-s FILE", "source file (default /dev/mem)")
BAREBOX_CMD_HELP_OPT ("-d FILE", "destination file (default /dev/mem)")
BAREBOX_CMD_HELP_END
BAREBOX_CMD_START(memcmp)
.cmd = do_memcmp,
BAREBOX_CMD_DESC("memory compare")
BAREBOX_CMD_OPTS("[-bwlsd] ADDR1 ADDR2 COUNT")
BAREBOX_CMD_GROUP(CMD_GRP_MEM)
BAREBOX_CMD_HELP(cmd_memcmp_help)
BAREBOX_CMD_END
|