The FSF address has changed in the past. Instead of updating it each time the address changes, just drop it completely treewide. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
163 lines
3.3 KiB
C
163 lines
3.3 KiB
C
/*
|
|
* crc.c - Calculate a crc32 checksum of a memory area
|
|
*
|
|
* Copyright (c) 2007 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.
|
|
*
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <fs.h>
|
|
#include <getopt.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <xfuncs.h>
|
|
#include <malloc.h>
|
|
#include <linux/ctype.h>
|
|
|
|
static int file_crc(char* filename, ulong start, ulong size, ulong *crc,
|
|
ulong *total)
|
|
{
|
|
int fd, now;
|
|
int ret = 0;
|
|
char *buf;
|
|
|
|
*total = 0;
|
|
*crc = 0;
|
|
|
|
fd = open(filename, O_RDONLY);
|
|
if (fd < 0) {
|
|
printf("open %s: %s\n", filename, errno_str());
|
|
return fd;
|
|
}
|
|
|
|
if (start > 0) {
|
|
off_t lseek_ret;
|
|
errno = 0;
|
|
lseek_ret = lseek(fd, start, SEEK_SET);
|
|
if (lseek_ret == (off_t)-1 && errno) {
|
|
perror("lseek");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
buf = xmalloc(4096);
|
|
|
|
while (size) {
|
|
now = min((ulong)4096, size);
|
|
now = read(fd, buf, now);
|
|
if (now < 0) {
|
|
ret = now;
|
|
perror("read");
|
|
goto out_free;
|
|
}
|
|
if (!now)
|
|
break;
|
|
*crc = crc32(*crc, buf, now);
|
|
size -= now;
|
|
*total += now;
|
|
}
|
|
|
|
printf ("CRC32 for %s 0x%08lx ... 0x%08lx ==> 0x%08lx",
|
|
filename, start, start + *total - 1, *crc);
|
|
|
|
out_free:
|
|
free(buf);
|
|
out:
|
|
close(fd);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int do_crc(int argc, char *argv[])
|
|
{
|
|
loff_t start = 0, size = ~0;
|
|
ulong crc = 0, vcrc = 0, total = 0;
|
|
char *filename = "/dev/mem";
|
|
#ifdef CONFIG_CMD_CRC_CMP
|
|
char *vfilename = NULL;
|
|
#endif
|
|
int opt, err = 0, filegiven = 0, verify = 0;
|
|
|
|
while((opt = getopt(argc, argv, "f:F:v:")) > 0) {
|
|
switch(opt) {
|
|
case 'f':
|
|
filename = optarg;
|
|
filegiven = 1;
|
|
break;
|
|
#ifdef CONFIG_CMD_CRC_CMP
|
|
case 'F':
|
|
verify = 1;
|
|
vfilename = optarg;
|
|
break;
|
|
#endif
|
|
case 'v':
|
|
verify = 1;
|
|
vcrc = simple_strtoul(optarg, NULL, 0);
|
|
break;
|
|
default:
|
|
return COMMAND_ERROR_USAGE;
|
|
}
|
|
}
|
|
|
|
if (!filegiven && optind == argc)
|
|
return COMMAND_ERROR_USAGE;
|
|
|
|
if (optind < argc) {
|
|
if (parse_area_spec(argv[optind], &start, &size)) {
|
|
printf("could not parse area description: %s\n", argv[optind]);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (file_crc(filename, start, size, &crc, &total) < 0)
|
|
return 1;
|
|
|
|
#ifdef CONFIG_CMD_CRC_CMP
|
|
if (vfilename) {
|
|
size = total;
|
|
puts("\n");
|
|
if (file_crc(vfilename, start, size, &vcrc, &total) < 0)
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
if (verify && crc != vcrc) {
|
|
printf(" != 0x%08lx ** ERROR **", vcrc);
|
|
err = 1;
|
|
}
|
|
|
|
printf("\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
BAREBOX_CMD_HELP_START(crc)
|
|
BAREBOX_CMD_HELP_USAGE("crc32 [OPTION] [AREA]\n")
|
|
BAREBOX_CMD_HELP_SHORT("Calculate a crc32 checksum of a memory area.\n")
|
|
BAREBOX_CMD_HELP_OPT ("-f <file>", "Use file instead of memory.\n")
|
|
#ifdef CONFIG_CMD_CRC_CMP
|
|
BAREBOX_CMD_HELP_OPT ("-F <file>", "Use file to compare.\n")
|
|
#endif
|
|
BAREBOX_CMD_HELP_OPT ("-v <crc>", "Verify\n")
|
|
BAREBOX_CMD_HELP_END
|
|
|
|
BAREBOX_CMD_START(crc32)
|
|
.cmd = do_crc,
|
|
.usage = "crc32 checksum calculation",
|
|
BAREBOX_CMD_HELP(cmd_crc_help)
|
|
BAREBOX_CMD_END
|