From 29bd05321aabd720c2ef1e96f09f03eda2f15337 Mon Sep 17 00:00:00 2001
From: risner <risner@users.noreply.github.com>
Date: Mon, 7 Feb 2022 12:22:50 -0500
Subject: [PATCH]  Force macOS to use statfs.

A macOS bug in libc statvfs(3) call truncates 64 bit elements (e.g. f_blocks) to 32 bits.
---
 ext/standard/filestat.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/ext/standard/filestat.c b/ext/standard/filestat.c
index 0d79bba461bea..e537f35829106 100644
--- a/ext/standard/filestat.c
+++ b/ext/standard/filestat.c
@@ -42,6 +42,16 @@
 #  include <os2.h>
 #endif
 
+#if defined(__APPLE__)
+  /*
+   Apple statvfs has an interger overflow in libc copying to statvfs.
+   cvt_statfs_to_statvfs(struct statfs *from, struct statvfs *to) {
+   to->f_blocks = (fsblkcnt_t)from->f_blocks;
+   */
+#  undef HAVE_SYS_STATVFS_H
+#  undef HAVE_STATVFS
+#endif
+
 #if defined(HAVE_SYS_STATVFS_H) && defined(HAVE_STATVFS)
 # include <sys/statvfs.h>
 #elif defined(HAVE_SYS_STATFS_H) && defined(HAVE_STATFS)