124 lines
2.7 KiB
C
124 lines
2.7 KiB
C
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/*
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* Copyright (c) International Business Machines Corp., 2006
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* Calculate CRC32 with UBI start value (0xFFFFFFFF) for a given binary image.
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*
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* Author: Oliver Lohmann
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*/
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#define PROGRAM_NAME "ubicrc32"
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include <unistd.h>
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#include <mtd/ubi-media.h>
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#include <crc32.h>
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#include "common.h"
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#define BUFSIZE 4096
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static const char doc[] = PROGRAM_NAME " version " VERSION
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" - a tool to calculate CRC32 with UBI start value (0xFFFFFFFF)";
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static const char optionsstr[] =
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"-h, --help print help message\n"
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"-V, --version print program version";
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static const char usage[] =
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"Usage: " PROGRAM_NAME " <file to calculate CRC32 for> [-h] [--help]";
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static const struct option long_options[] = {
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{ .name = "help", .has_arg = 0, .flag = NULL, .val = 'h' },
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{ .name = "version", .has_arg = 0, .flag = NULL, .val = 'V' },
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{ NULL, 0, NULL, 0},
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};
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static int parse_opt(int argc, char * const argv[])
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{
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while (1) {
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int key;
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key = getopt_long(argc, argv, "hV", long_options, NULL);
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if (key == -1)
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break;
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switch (key) {
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case 'h':
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printf("%s\n\n", doc);
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printf("%s\n\n", usage);
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printf("%s\n", optionsstr);
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exit(EXIT_SUCCESS);
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case 'V':
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common_print_version();
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exit(EXIT_SUCCESS);
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case ':':
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return errmsg("parameter is missing");
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default:
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fprintf(stderr, "Use -h for help\n");
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return -1;
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}
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}
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return 0;
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}
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int main(int argc, char * const argv[])
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{
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int err = 0;
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uint32_t crc = UBI_CRC32_INIT;
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char buf[BUFSIZE];
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FILE *fp;
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if (argc > 1) {
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fp = fopen(argv[1], "r");
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if (!fp)
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return sys_errmsg("cannot open \"%s\"", argv[1]);
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} else
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fp = stdin;
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err = parse_opt(argc, argv);
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if (err)
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return err;
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while (!feof(fp)) {
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size_t read;
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read = fread(buf, 1, BUFSIZE, fp);
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if (ferror(fp)) {
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sys_errmsg("cannot read input file");
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err = -1;
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goto out_close;
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}
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crc = mtd_crc32(crc, buf, read);
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}
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printf("0x%08x\n", crc);
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out_close:
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if (fp != stdin)
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fclose(fp);
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return err;
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}
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