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/*
* Copyright (c) International Business Machines Corp., 2006
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* Calculate CRC32 with UBI start value (0xFFFFFFFF) for a given binary image.
*
* Author: Oliver Lohmann
*/
#define PROGRAM_VERSION "1.0"
#define PROGRAM_NAME "ubicrc32"
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <getopt.h>
#include <unistd.h>
#include <mtd/ubi-media.h>
#include <crc32.h>
#include "common.h"
#define BUFSIZE 4096
static const char doc[] = PROGRAM_NAME " version " PROGRAM_VERSION
" - a tool to calculate CRC32 with UBI start value (0xFFFFFFFF)";
static const char optionsstr[] =
"-h, --help print help message\n"
"-V, --version print program version";
static const char usage[] =
"Usage: " PROGRAM_NAME " <file to calculate CRC32 for> [-h] [--help]";
static const struct option long_options[] = {
{ .name = "help", .has_arg = 0, .flag = NULL, .val = 'h' },
{ .name = "version", .has_arg = 0, .flag = NULL, .val = 'V' },
{ NULL, 0, NULL, 0},
};
static int parse_opt(int argc, char * const argv[])
{
while (1) {
int key;
key = getopt_long(argc, argv, "hV", long_options, NULL);
if (key == -1)
break;
switch (key) {
case 'h':
printf("%s\n\n", doc);
printf("%s\n\n", usage);
printf("%s\n", optionsstr);
exit(EXIT_SUCCESS);
case 'V':
fprintf(stderr, "%s\n", PROGRAM_VERSION);
exit(EXIT_SUCCESS);
case ':':
return errmsg("parameter is missing");
default:
fprintf(stderr, "Use -h for help\n");
return -1;
}
}
return 0;
}
int main(int argc, char * const argv[])
{
int err = 0;
uint32_t crc = UBI_CRC32_INIT;
char buf[BUFSIZE];
FILE *fp;
if (argc > 1) {
fp = fopen(argv[1], "r");
if (!fp)
return sys_errmsg("cannot open \"%s\"", argv[1]);
} else
fp = stdin;
err = parse_opt(argc, argv);
if (err)
return err;
while (!feof(fp)) {
size_t read;
read = fread(buf, 1, BUFSIZE, fp);
if (ferror(fp)) {
sys_errmsg("cannot read input file");
err = -1;
goto out_close;
}
crc = mtd_crc32(crc, buf, read);
}
printf("0x%08x\n", crc);
out_close:
if (fp != stdin)
fclose(fp);
return err;
}
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