From 740d41ce9f7fdf209366e930bd0fdcc6b1bc6b79 Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Wed, 24 Jul 2019 03:21:25 +0300
Subject: [PATCH] Add CheckDataDirOption() function

---
 src/util/system.cpp | 11 +++++++++--
 src/util/system.h   |  2 ++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/util/system.cpp b/src/util/system.cpp
index d9e23199ec3..520ed35504e 100644
--- a/src/util/system.cpp
+++ b/src/util/system.cpp
@@ -741,8 +741,9 @@ const fs::path &GetDataDir(bool fNetSpecific)
     // this function
     if (!path.empty()) return path;
 
-    if (gArgs.IsArgSet("-datadir")) {
-        path = fs::system_complete(gArgs.GetArg("-datadir", ""));
+    std::string datadir = gArgs.GetArg("-datadir", "");
+    if (!datadir.empty()) {
+        path = fs::system_complete(datadir);
         if (!fs::is_directory(path)) {
             path = "";
             return path;
@@ -761,6 +762,12 @@ const fs::path &GetDataDir(bool fNetSpecific)
     return path;
 }
 
+bool CheckDataDirOption()
+{
+    std::string datadir = gArgs.GetArg("-datadir", "");
+    return datadir.empty() || fs::is_directory(fs::system_complete(datadir));
+}
+
 void ClearDatadirCache()
 {
     LOCK(csPathCached);
diff --git a/src/util/system.h b/src/util/system.h
index dda91564887..9ed9f1f0df3 100644
--- a/src/util/system.h
+++ b/src/util/system.h
@@ -83,6 +83,8 @@ fs::path GetDefaultDataDir();
 // The blocks directory is always net specific.
 const fs::path &GetBlocksDir();
 const fs::path &GetDataDir(bool fNetSpecific = true);
+// Return true if -datadir option points to a valid directory or is not specified.
+bool CheckDataDirOption();
 /** Tests only */
 void ClearDatadirCache();
 fs::path GetConfigFile(const std::string& confPath);