wipe.c

系统迁移的源代码： http://www.diku.dk/hjemmesider/ansatte/jacobg/

#define PAGE_SIZE 4096
#define O_DIRECT      040000
int main(void)
{
	printf("wiping /dev/hda1, fd %d\n",o);
	memset(page,0,PAGE_SIZE);
	for(i=0; i<0x1003; i++)
	{
		int r;

		lseek(o, offset + i * PAGE_SIZE, SEEK_SET);
		r = write(o, page, PAGE_SIZE);
		if(r<0)
		{
			printf("r %d\n",r);
			exit(-1);
		}
	}
}