From 6dddb268df08fd91f8e0f189f948ad76e5805dca Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Wed, 23 Nov 2022 11:38:20 +0100
Subject: lib/replace: let rep_openat2() inject O_LARGEFILE as needed

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15251

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
---
 lib/replace/replace.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'lib/replace')

diff --git a/lib/replace/replace.c b/lib/replace/replace.c
index cbf372e494f..68829f2a3c9 100644
--- a/lib/replace/replace.c
+++ b/lib/replace/replace.c
@@ -1116,6 +1116,22 @@ long rep_openat2(int dirfd, const char *pathname,
 		 struct open_how *how, size_t size)
 {
 #ifdef __NR_openat2
+#if _FILE_OFFSET_BITS == 64 && SIZE_MAX == 0xffffffffUL && defined(O_LARGEFILE)
+	struct open_how __how;
+
+#if defined(O_PATH) && ! defined(DISABLE_OPATH)
+	if ((how->flags & O_PATH) == 0)
+#endif
+	{
+		if (sizeof(__how) == size) {
+			__how = *how;
+
+			__how.flags |= O_LARGEFILE;
+			how = &__how;
+		}
+	}
+#endif
+
 	return syscall(__NR_openat2,
 		       dirfd,
 		       pathname,
-- 
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