From 267e31f5b7d315569b7145545d98d81b4789552f Mon Sep 17 00:00:00 2001
From: 0xFFFC0000 <0xFFFC0000@proton.me>
Date: Mon, 22 Apr 2024 14:32:12 +0000
Subject: Add drop_and_recreate in privatefile class. When creating a private
 file we need to delete the file if exist.

---
 src/common/util.cpp | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

(limited to 'src/common/util.cpp')

diff --git a/src/common/util.cpp b/src/common/util.cpp
index b4f3360ef..ea117dff3 100644
--- a/src/common/util.cpp
+++ b/src/common/util.cpp
@@ -121,7 +121,7 @@ namespace tools
   private_file::private_file(std::FILE* handle, std::string&& filename) noexcept
     : m_handle(handle), m_filename(std::move(filename)) {}
 
-  private_file private_file::create(std::string name)
+  private_file private_file::create(std::string name, uint32_t extra_flags)
   {
 #ifdef WIN32
     struct close_handle
@@ -174,7 +174,7 @@ namespace tools
         name.c_str(),
         GENERIC_WRITE, FILE_SHARE_READ,
         std::addressof(attributes),
-        CREATE_NEW, (FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE),
+        CREATE_NEW, (FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE | extra_flags),
         nullptr
       )
     };
@@ -193,7 +193,7 @@ namespace tools
       }
     }
 #else
-    const int fdr = open(name.c_str(), (O_RDONLY | O_CREAT), S_IRUSR);
+    const int fdr = open(name.c_str(), (O_RDONLY | O_CREAT | extra_flags), S_IRUSR);
     if (0 <= fdr)
     {
       struct stat rstats = {};
@@ -224,6 +224,23 @@ namespace tools
     return {};
   }
 
+  private_file private_file::drop_and_recreate(std::string filename)
+  {
+    if (epee::file_io_utils::is_file_exist(filename)) {
+      boost::system::error_code ec{};
+      boost::filesystem::remove(filename, ec);
+      if (ec) {
+        MERROR("Failed to remove " << filename << ": " << ec.message());
+        return {};
+      }
+    }
+#ifdef WIN32
+    return create(filename);
+#else
+    return create(filename, O_EXCL);
+#endif
+  }
+
   private_file::~private_file() noexcept
   {
     try
-- 
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