src/temp/__randname.c

   1 #include <time.h>
   2 #include <stdint.h>
   3
   4 int __clock_gettime(clockid_t, struct timespec *);
   5
   6 /* This assumes that a check for the
   7    template size has already been made */
   8 char *__randname(char *template)
   9 {
  10         int i;
  11         struct timespec ts;
  12         unsigned long r;
  13
  14         __clock_gettime(CLOCK_REALTIME, &ts);
  15         r = ts.tv_nsec*65537 ^ (uintptr_t)&ts / 16 + (uintptr_t)template;
  16         for (i=0; i<6; i++, r>>=5)
  17                 template[i] = 'A'+(r&15)+(r&16)*2;
  18
  19         return template;
  20 }