From f946bb7be6ec434dddf9a5d2fb1903609a514dd2 Mon Sep 17 00:00:00 2001
From: ston1th <ston1th@giftfish.de>
Date: Sun, 22 Oct 2017 13:38:19 +0200
Subject: [PATCH] fixed an LMDB issue on OpenBSD (#2699) which leads to a crash
 in monerod

---
 src/blockchain_db/lmdb/db_lmdb.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/blockchain_db/lmdb/db_lmdb.cpp b/src/blockchain_db/lmdb/db_lmdb.cpp
index 3979a5edf..5bd02bcf7 100644
--- a/src/blockchain_db/lmdb/db_lmdb.cpp
+++ b/src/blockchain_db/lmdb/db_lmdb.cpp
@@ -1123,6 +1123,12 @@ void BlockchainLMDB::open(const std::string& filename, const int db_flags)
 
   m_folder = filename;
 
+#ifdef __OpenBSD__
+  if ((mdb_flags & MDB_WRITEMAP) == 0) {
+    MCLOG_RED(el::Level::Info, "global", "Running on OpenBSD: forcing WRITEMAP");
+    mdb_flags |= MDB_WRITEMAP;
+  }
+#endif
   // set up lmdb environment
   if ((result = mdb_env_create(&m_env)))
     throw0(DB_ERROR(lmdb_error("Failed to create lmdb environment: ", result).c_str()));