From 34ef189a92e353392ae5f41718b0ae2ff8fbf5a1 Mon Sep 17 00:00:00 2001
From: Mounir IDRASSI <mounir.idrassi@idrix.fr>
Date: Sat, 19 Aug 2023 20:47:43 +0200
Subject: Linux: try use IOCTL BLKGETSIZE64 to get size of device instead of
 lseek

---
 src/Platform/Unix/File.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/Platform/Unix/File.cpp b/src/Platform/Unix/File.cpp
index d3413800..207efb4e 100644
--- a/src/Platform/Unix/File.cpp
+++ b/src/Platform/Unix/File.cpp
@@ -221,6 +221,17 @@ namespace VeraCrypt
 			return mediaSize;
 #	endif
 		}
+#endif
+#ifdef TC_LINUX
+		// On Linux, try to use BLKGETSIZE64 for devices
+		if (Path.IsDevice())
+		{
+			uint64 mediaSize;
+			if (ioctl (FileHandle, BLKGETSIZE64, &mediaSize) != -1)
+			{
+				return mediaSize;
+			}
+		}
 #endif
 		off_t current = lseek (FileHandle, 0, SEEK_CUR);
 		throw_sys_sub_if (current == -1, wstring (Path));
-- 
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