From 591bbcbb636d9579f49fb3e45572f6893e23e692 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 8 Apr 2025 20:11:21 +0530
Subject: [PATCH] Only use pread64 on Linux

---
 src/calibre/utils/speedup.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/calibre/utils/speedup.c b/src/calibre/utils/speedup.c
index 7249b29953..b605445413 100644
--- a/src/calibre/utils/speedup.c
+++ b/src/calibre/utils/speedup.c
@@ -748,9 +748,13 @@ pread_all(PyObject *self, PyObject *args) {
             break;
         }
 #else
+#ifdef __linux__
         ssize_t nr = pread64(fd, buf + pos, n - pos, offset);
+#else
+        ssize_t nr = pread(fd, buf + pos, n - pos, offset);
+#endif
         if (nr < 0) {
-            if (errno == EINTR || errno == EAGAIN || errno == EBUSY) continue;
+            if (errno == EINTR || errno == EAGAIN) continue;
             saved_errno = errno;
             break;
         } else if (nr == 0) break;