Provide relevant error message if datadir is not writable.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/init.cpp b/src/init.cpp
index f763c3a435..6493ae72bd 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -1165,6 +1165,9 @@ static bool LockDataDirectory(bool probeOnly)
 {
     // Make sure only a single Bitcoin process is using the data directory.
     fs::path datadir = GetDataDir();
+    if (!DirIsWritable(datadir)) {
+        return InitError(strprintf(_("Cannot write to data directory '%s'; check permissions."), datadir.string()));
+    }
     if (!LockDirectory(datadir, ".lock", probeOnly)) {
         return InitError(strprintf(_("Cannot obtain a lock on data directory %s. %s is probably already running."), datadir.string(), _(PACKAGE_NAME)));
     }