From 835cd40733d63bce9a4bd843482766c246495044 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Thu, 16 Jul 2026 21:16:45 +0200
Subject: sharedstorage: fix darwin & freebsd build failure

---
 internal/syscallcompat/sys_freebsd.go | 5 +++++
 tests/cluster/poc_test.go             | 6 +++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/internal/syscallcompat/sys_freebsd.go b/internal/syscallcompat/sys_freebsd.go
index d88b1cf..0d28f3e 100644
--- a/internal/syscallcompat/sys_freebsd.go
+++ b/internal/syscallcompat/sys_freebsd.go
@@ -32,6 +32,11 @@ const (
 
 	// For the utimensat syscall on FreeBSD
 	AT_EMPTY_PATH = 0x4000
+
+	// F_OFD_SETLKW only exists on Linux. On Darwin, fall back to F_SETLKW as a
+	// flawed replacement.
+	F_OFD_SETLKW = unix.F_SETLKW
+	F_OFD_SETLK  = unix.F_SETLK
 )
 
 // EnospcPrealloc is supposed to preallocate ciphertext space without
diff --git a/tests/cluster/poc_test.go b/tests/cluster/poc_test.go
index e8b6da6..52b9ec9 100644
--- a/tests/cluster/poc_test.go
+++ b/tests/cluster/poc_test.go
@@ -44,11 +44,11 @@ func TestPoCFcntlFlock(t *testing.T) {
 		Start:  0,
 		Len:    0,
 	}
-	err = unix.FcntlFlock(uintptr(fd1), unix.F_OFD_SETLK, &lk)
+	err = unix.FcntlFlock(uintptr(fd1), syscallcompat.F_OFD_SETLK, &lk)
 	if err != nil {
 		t.Fatal(err)
 	}
-	err = unix.FcntlFlock(uintptr(fd2), unix.F_OFD_SETLK, &lk)
+	err = unix.FcntlFlock(uintptr(fd2), syscallcompat.F_OFD_SETLK, &lk)
 	if err == nil {
 		t.Fatal("double-lock succeeded but should have failed")
 	}
@@ -190,7 +190,7 @@ func doTestPoCTornWrite(t *testing.T, locking bool) {
 					Start:  0,
 					Len:    int64(len(blockData)),
 				}
-				if err := unix.FcntlFlock(uintptr(f.Fd()), unix.F_OFD_SETLKW, &lk); err != nil {
+				if err := unix.FcntlFlock(uintptr(f.Fd()), syscallcompat.F_OFD_SETLKW, &lk); err != nil {
 					t.Error(err)
 					return
 				}
-- 
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