From 7ffa95f4d8f4520636a75496e267fef417fc1fb0 Mon Sep 17 00:00:00 2001
From: Martin Ridgers <martin.ridgers@epicgames.com>
Date: Tue, 30 Nov 2021 16:26:05 +0100
Subject: Do not block when trying to lock a lock file (POSIX)

---
 zenstore/basicfile.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'zenstore/basicfile.cpp')

diff --git a/zenstore/basicfile.cpp b/zenstore/basicfile.cpp
index 413c78674..3edfc15ee 100644
--- a/zenstore/basicfile.cpp
+++ b/zenstore/basicfile.cpp
@@ -376,7 +376,7 @@ LockFile::Create(std::filesystem::path FileName, CbObject Payload, std::error_co
 		return;
 	}
 
-	int LockRet = flock(Fd, LOCK_EX);
+	int LockRet = flock(Fd, LOCK_EX|LOCK_NB);
 	if (LockRet < 0)
 	{
 		Ec = zen::MakeErrorCodeFromLastError();
-- 
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