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Diffstat (limited to 'ubi-utils/ubicrc32.c')
-rw-r--r-- | ubi-utils/ubicrc32.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/ubi-utils/ubicrc32.c b/ubi-utils/ubicrc32.c new file mode 100644 index 0000000..73ec595 --- /dev/null +++ b/ubi-utils/ubicrc32.c @@ -0,0 +1,124 @@ +/* + * 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; +} |