#include <stdio.h>
#include <time.h>
#include <asm/types.h>
#include <asm/div64.h>

typedef  __u64 u64;

#define NTFS_TIME_OFFSET ((u64)(369*365 + 89) * 24 * 3600 * 10000000)

static time_t
smb_ntutc2unixutc(u64 ntutc)
{
	u64 t = ntutc - NTFS_TIME_OFFSET;
	printf("adjusted: %Lx\n", t);

	do_div(t, 10000000);
	printf("/ 10000000: %Lx\n", t);

	return (time_t)t;
}

int main()
{
    time_t t;

    t = time(NULL);
    printf("now: %ld\n", t);

    t = smb_ntutc2unixutc(0x01c29fb515986100LL);
    printf("%ld\n", t);
}