From fa43a4138b4a652bd83d70536539ae2aded05f0c Mon Sep 17 00:00:00 2001
From: MarcoFalke <falke.marco@gmail.com>
Date: Sat, 14 Jul 2018 10:54:51 -0400
Subject: [PATCH] bench_bitcoin: Avoid read/write to default datadir

---
 src/bench/bench_bitcoin.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/bench/bench_bitcoin.cpp b/src/bench/bench_bitcoin.cpp
index f3302bfe5ad..92befdd5935 100644
--- a/src/bench/bench_bitcoin.cpp
+++ b/src/bench/bench_bitcoin.cpp
@@ -38,6 +38,14 @@ static void SetupBenchArgs()
     gArgs.AddArg("-help", "", false, OptionsCategory::HIDDEN);
 }
 
+static fs::path SetDataDir()
+{
+    fs::path ret = fs::temp_directory_path() / "bench_bitcoin" / fs::unique_path();
+    fs::create_directories(ret);
+    gArgs.ForceSetArg("-datadir", ret.string());
+    return ret;
+}
+
 int main(int argc, char** argv)
 {
     SetupBenchArgs();
@@ -53,6 +61,9 @@ int main(int argc, char** argv)
         return EXIT_SUCCESS;
     }
 
+    // Set the datadir after parsing the bench options
+    const fs::path bench_datadir{SetDataDir()};
+
     SHA256AutoDetect();
     RandomInit();
     ECC_Start();
@@ -80,6 +91,8 @@ int main(int argc, char** argv)
 
     benchmark::BenchRunner::RunAll(*printer, evaluations, scaling_factor, regex_filter, is_list_only);
 
+    fs::remove_all(bench_datadir);
+
     ECC_Stop();
 
     return EXIT_SUCCESS;