From 6e74d4ee377a5f1933444cb28406f322b5fc0273 Mon Sep 17 00:00:00 2001
From: Yuta Saito <kateinoigakukun@gmail.com>
Date: Sat, 7 Aug 2021 00:39:27 -0700
Subject: [PATCH] WASI: use getentropy to get randomized bytes

---
 Sources/UUID/uuid.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Sources/UUID/uuid.c b/Sources/UUID/uuid.c
index 8282995df2..5dc4aca97a 100644
--- a/Sources/UUID/uuid.c
+++ b/Sources/UUID/uuid.c
@@ -88,6 +88,12 @@ static inline void read_random(void *buffer, unsigned numBytes) {
     BCryptGenRandom(NULL, buffer, numBytes,
                     BCRYPT_RNG_USE_ENTROPY_IN_BUFFER | BCRYPT_USE_SYSTEM_PREFERRED_RNG);
 }
+#elif TARGET_OS_WASI
+#include <sys/random.h>
+
+static inline void read_random(void *buffer, unsigned numBytes) {
+  getentropy(buffer, numBytes);
+}
 #else
 static inline void read_random(void *buffer, unsigned numBytes) {
     int fd = open("/dev/urandom", O_RDONLY);