From 787736990ac3b7d5ceaba2697c7d0f58f77bb782 Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Wed, 10 Mar 2021 20:19:04 +0100
Subject: iOS: Don't use getentropy() since it's disallowed in the App Store.

Reported by MoNTE48.
---
 src/lj_prng.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/lj_prng.c b/src/lj_prng.c
index f09aaffa..0c4a5cf0 100644
--- a/src/lj_prng.c
+++ b/src/lj_prng.c
@@ -109,10 +109,16 @@ static PRGR libfunc_rgr;
 #include <sys/syscall.h>
 #else
 
-#if LJ_TARGET_OSX
+#if LJ_TARGET_OSX && !LJ_TARGET_IOS
+/*
+** In their infinite wisdom Apple decided to disallow getentropy() in the
+** iOS App Store. Even though the call is common to all BSD-ish OS, it's
+** recommended by Apple in their own security-related docs, and, to top
+** off the foolery, /dev/urandom is handled by the same kernel code,
+** yet accessing it is actually permitted (but less efficient).
+*/
 #include <Availability.h>
-#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 101200 || \
-    __IPHONE_OS_VERSION_MIN_REQUIRED >= 100000
+#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 101200
 #define LJ_TARGET_HAS_GETENTROPY	1
 #endif
 #elif LJ_TARGET_BSD || LJ_TARGET_SOLARIS || LJ_TARGET_CYGWIN
-- 
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