From ac76e8604c460214ad396e249dc4e616f1928cbc Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Mon, 24 Oct 2022 13:37:34 +0300
Subject: [PATCH] Improve TdDb::check_parameters.

---
 td/telegram/TdDb.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/td/telegram/TdDb.cpp b/td/telegram/TdDb.cpp
index 39fe13dd3..4dfe42c99 100644
--- a/td/telegram/TdDb.cpp
+++ b/td/telegram/TdDb.cpp
@@ -495,8 +495,11 @@ Status TdDb::check_parameters(TdParameters &parameters) {
     }
     TRY_STATUS(mkpath(dir, 0750));
     TRY_RESULT(real_dir, realpath(dir, true));
-    if (dir.back() != TD_DIR_SLASH) {
-      dir += TD_DIR_SLASH;
+    if (real_dir.empty()) {
+      return Status::Error(PSTRING() << "Failed to get realpath for \"" << dir << '"');
+    }
+    if (real_dir.back() != TD_DIR_SLASH) {
+      real_dir += TD_DIR_SLASH;
     }
     return real_dir;
   };