How would I qsort in this case

I'm sorting a utmp file by ut_time. Right now, I have something like the following:

Code:

#define MAX_USERS 10

struct utmp info[MAX_USERS];

int 
compare (const void *a, const void *b)
{
  const struct utmp *ma = a;
  const struct utmp *mb = b;
  int32_t time1, time2;
  time1 = ma->ut_time; 
  time2 = mb->ut_time;
 
  if(time1 < time2)
      return -1;
  else if(time1 > time2)
      return 1;
  else
      return 0;
}

void 
print_session(void)
{
 int i;
 for(i=0; i < counter; i++)
      printf("name: %s, tty: %s\n", info[i].ut_name, info[i].ut_line);
}


void 
find_sessions_to_kill(void){
  qsort(info,
  counter,
  sizeof(struct utmp),
  compare
   );
  print_session();
  kill_sessions();
}

Now, how I qsort ut_time in utmp if I had a structure like the following:

Code:

typedef struct {
  uid_t uid; /*From the uid I can get the pid*/
  dev_t dev;
  struct utmp in_users;
}uinfo_t;

uinfo_t uinfo[MAX_USERS];

I would assume ut_time would be found by

Code:

uinfo.in_users.ut_time

> uinfo.in_users.ut_time
Try
uinfo->in_users.ut_time