components/entropy.c

   1 /* See LICENSE file for copyright and license details. */
   2 #if defined(__linux__)
   3         #include <stdio.h>
   4
   5         #include "../util.h"
   6
   7         const char *
   8         entropy(void)
   9         {
  10                 int num;
  11
  12                 return (pscanf("/proc/sys/kernel/random/entropy_avail",
  13                                "%d", &num) == 1) ?
  14                        bprintf("%d", num) : NULL;
  15         }
  16 #elif defined(__OpenBSD__)
  17         const char *
  18         entropy(void)
  19         {
  20                 /* Unicode Character 'INFINITY' (U+221E) */
  21                 return "\xe2\x88\x9e";
  22         }
  23 #endif