From 98861b23fccabe552c1bc3b4082aa2991d615001 Mon Sep 17 00:00:00 2001
From: Justine Tunney <jtunney@gmail.com>
Date: Sun, 5 Jan 2025 20:15:34 -0800
Subject: [PATCH] Make some style fixes to prng code

---
 libc/calls/getrandom.c  | 5 ++---
 libc/calls/read-nt.c    | 6 ++++--
 libc/stdio/getentropy.c | 3 +++
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/libc/calls/getrandom.c b/libc/calls/getrandom.c
index 9bb079c77..a0c53383b 100644
--- a/libc/calls/getrandom.c
+++ b/libc/calls/getrandom.c
@@ -114,7 +114,8 @@ static ssize_t GetDevUrandom(char *p, size_t n, unsigned f) {
 ssize_t __getrandom(void *p, size_t n, unsigned f) {
   ssize_t rc;
   if (IsWindows()) {
-    rc = ProcessPrng(p, n) ? n : __winerr();
+    ProcessPrng(p, n);  // never fails
+    rc = n;
   } else if (have_getrandom) {
     if (IsXnu() || IsOpenbsd()) {
       rc = GetRandomBsd(p, n, GetRandomEntropy);
@@ -184,9 +185,7 @@ ssize_t __getrandom(void *p, size_t n, unsigned f) {
  * @raise EFAULT if the `n` bytes at `p` aren't valid memory
  * @raise EINTR if we needed to block and a signal was delivered instead
  * @cancelationpoint
- * @asyncsignalsafe
  * @restartable
- * @vforksafe
  */
 ssize_t getrandom(void *p, size_t n, unsigned f) {
   ssize_t rc;
diff --git a/libc/calls/read-nt.c b/libc/calls/read-nt.c
index e66e54c37..b50f428e2 100644
--- a/libc/calls/read-nt.c
+++ b/libc/calls/read-nt.c
@@ -997,8 +997,10 @@ textwindows ssize_t ReadBuffer(int fd, void *data, size_t size, int64_t offset,
   if (f->kind == kFdDevNull)
     return 0;
 
-  if (f->kind == kFdDevRandom)
-    return ProcessPrng(data, size) ? size : __winerr();
+  if (f->kind == kFdDevRandom) {
+    ProcessPrng(data, size);
+    return size;
+  }
 
   if (f->kind == kFdConsole)
     return ReadFromConsole(f, data, size, waitmask);
diff --git a/libc/stdio/getentropy.c b/libc/stdio/getentropy.c
index 2d171247f..ad8d357a8 100644
--- a/libc/stdio/getentropy.c
+++ b/libc/stdio/getentropy.c
@@ -21,6 +21,7 @@
 #include "libc/dce.h"
 #include "libc/errno.h"
 #include "libc/intrin/strace.h"
+#include "libc/runtime/syslib.internal.h"
 #include "libc/sysv/errfuns.h"
 
 int sys_getentropy(void *, size_t) asm("sys_getrandom");
@@ -39,6 +40,8 @@ int getentropy(void *p, size_t n) {
     rc = eio();
   } else if ((!p && n)) {
     rc = efault();
+  } else if (IsXnuSilicon()) {
+    rc = __syslib->__getentropy(p, n);
   } else if (IsXnu() || IsOpenbsd()) {
     rc = sys_getentropy(p, n);
   } else {