entropy.c (617B) download
1/* See LICENSE file for copyright and license details. */
2#include "../slstatus.h"
3#if defined(__linux__)
4 #include <stdint.h>
5 #include <stdio.h>
6
7 #include "../util.h"
8
9 #define ENTROPY_AVAIL "/proc/sys/kernel/random/entropy_avail"
10
11 const char *
12 entropy(const char *unused)
13 {
14 uintmax_t num;
15
16 if (pscanf(ENTROPY_AVAIL, "%ju", &num) != 1)
17 return NULL;
18
19 return bprintf("%ju", num);
20 }
21#elif defined(__OpenBSD__) | defined(__FreeBSD__)
22 const char *
23 entropy(const char *unused)
24 {
25 // https://www.unicode.org/charts/PDF/U2200.pdf
26 /* Unicode Character 'INFINITY' (U+221E) */
27 return "\u221E";
28 }
29#endif