summaryrefslogtreecommitdiff
path: root/ubi-utils/ubicrc32.c
diff options
context:
space:
mode:
Diffstat (limited to 'ubi-utils/ubicrc32.c')
-rw-r--r--ubi-utils/ubicrc32.c124
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;
+}