From 74811ddaff123e331368f69d93de4c9741f82fee Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Thu, 3 Mar 2016 22:17:59 +0900
Subject: [PATCH] mingw: Add warning for falloc

---
 src/option_processing.cc | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/option_processing.cc b/src/option_processing.cc
index 7b14c323..89ea9cf3 100644
--- a/src/option_processing.cc
+++ b/src/option_processing.cc
@@ -337,6 +337,17 @@ error_code::Value option_processing(Option& op, bool standalone,
                 "--save-session");
     op.remove(PREF_DEFERRED_INPUT);
   }
+
+#ifdef __MINGW32__
+  if (op.get(PREF_FILE_ALLOCATION) == V_FALLOC) {
+    A2_LOG_WARN(
+        "--file-allocation=falloc will use SetFileValidData() API, and "
+        "aria2 uses uninitialized disk space which may contain "
+        "confidential data as the download file space. If it is "
+        "undesirable, --file-allocation=prealloc is slower, but safer option.");
+  }
+#endif // __MINGW32__
+
   return error_code::FINISHED;
 }