openwrt-xburst/target/linux/xburst/files-2.6.27/drivers/mtd/mtd-utils/flash_unlock.c

/*
 * FILE flash_unlock.c
 *
 * This utility unlock all sectors of flash device.
 *
 */

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <time.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <string.h>

#include <mtd/mtd-user.h>

int main(int argc, char *argv[])
{
	int fd;
	struct mtd_info_user mtdInfo;
	struct erase_info_user mtdLockInfo;

	/*
	 * Parse command line options
	 */
	if(argc != 2)
	{
		fprintf(stderr, "USAGE: %s <mtd device>\n", argv[0]);
		exit(1);
	}
	else if(strncmp(argv[1], "/dev/mtd", 8) != 0)
	{
		fprintf(stderr, "'%s' is not a MTD device.  Must specify mtd device: /dev/mtd?\n", argv[1]);
		exit(1);
	}

	fd = open(argv[1], O_RDWR);
	if(fd < 0)
	{
		fprintf(stderr, "Could not open mtd device: %s\n", argv[1]);
		exit(1);
	}

	if(ioctl(fd, MEMGETINFO, &mtdInfo))
	{
		fprintf(stderr, "Could not get MTD device info from %s\n", argv[1]);
		close(fd);
		exit(1);
	}

	mtdLockInfo.start = 0;
	mtdLockInfo.length = mtdInfo.size;
	if(ioctl(fd, MEMUNLOCK, &mtdLockInfo))
	{
		fprintf(stderr, "Could not unlock MTD device: %s\n", argv[1]);
		close(fd);
		exit(1);
	}

	return 0;
}