__randname.c raw

   1  #include <time.h>
   2  #include <stdint.h>
   3  
   4  /* This assumes that a check for the
   5     template size has already been made */
   6  char *__randname(char *template)
   7  {
   8  	int i;
   9  	struct timespec ts;
  10  	unsigned long r;
  11  
  12  	__clock_gettime(CLOCK_REALTIME, &ts);
  13  	r = ts.tv_nsec*65537 ^ (uintptr_t)&ts / 16 + (uintptr_t)template;
  14  	for (i=0; i<6; i++, r>>=5)
  15  		template[i] = 'A'+(r&15)+(r&16)*2;
  16  
  17  	return template;
  18  }
  19