1 files changed, 86 insertions, 0 deletions
diff --git a/board/netstar/crcit.c b/board/netstar/crcit.c
new file mode 100644
index 0000000..f6d3066
--- /dev/null
+++ b/board/netstar/crcit.c
@@ -0,0 +1,86 @@
+/*
+ * (C) Copyright 2005
+ * 2N Telekomunikace, Ladislav Michl <michl@2n.cz>
+ *
+ * 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 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "crcek.h"
+
+extern unsigned long crc32(unsigned long, const unsigned char *, unsigned int);
+
+uint32_t data[LOADER_SIZE/4 + 3];
+
+int doit(char *path, unsigned version)
+{
+	uint32_t *p;
+	ssize_t size;
+	int fd;
+
+	fd = open(path, O_RDONLY);
+	if (fd == -1) {
+		perror("Error opening file");
+		return EXIT_FAILURE;
+	}
+	p = data + 2;
+	size = read(fd, p, LOADER_SIZE + 4);
+	if (size == -1) {
+		perror("Error reading file");
+		return EXIT_FAILURE;
+	}
+	if (size > LOADER_SIZE) {
+		fprintf(stderr, "File too large\n");
+		return EXIT_FAILURE;
+	}
+	size = (((size - 1) >> 2) + 1) << 2;
+	data[0] = size + 4;	/* add size of version field */
+	data[1] = version;
+	data[(size >> 2) + 2] = crc32(0, (unsigned char *)(data + 1), data[0]);
+	close(fd);
+
+	if (write(STDOUT_FILENO, data, size + 3*4) == -1) {
+		perror("Error writing file");
+		return EXIT_FAILURE;
+	}
+
+	return EXIT_SUCCESS;
+}
+
+int main(int argc, char **argv)
+{
+	if (argc == 2) {
+		return doit(argv[1], 0);
+	} else if ((argc == 4) && (strcmp(argv[1], "-v") == 0)) {
+		char *endptr, *nptr = argv[2];
+		unsigned ver = strtoul(nptr, &endptr, 0);
+		if (nptr != '\0' && endptr == '\0')
+			return doit(argv[3], ver);
+	}
+	fprintf(stderr, "Usage: crcit [-v version] <image>\n");
+
+	return EXIT_FAILURE;
+}