linux-kernel - [PATCH 2/2] Documentation/admin-guide/binfmt-misc/mono: add Caveats

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Message-ID: <20251103102753.462-2-arthur200126@gmail.com>
Date: Mon,  3 Nov 2025 18:27:44 +0800
From: Mingye Wang <arthur200126@...il.com>
To: Christian Brauner <brauner@...nel.org>,
	linux-kernel@...r.kernel.org
Cc: Mingye Wang <arthur200126@...il.com>
Subject: [PATCH 2/2] Documentation/admin-guide/binfmt-misc/mono: add Caveats

This will clash with wine. Spell it out.
---
 Documentation/admin-guide/binfmt-misc/mono.rst | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/admin-guide/binfmt-misc/mono.rst b/Documentation/admin-guide/binfmt-misc/mono.rst
index c6dab568006..a11655c72b5 100644
--- a/Documentation/admin-guide/binfmt-misc/mono.rst
+++ b/Documentation/admin-guide/binfmt-misc/mono.rst
@@ -68,3 +68,16 @@ other program after you have done the following:
 
       If this fails with a permission denied error, check
       that the ``.exe`` file has execute permissions.
+
+Caveats
+^^^^^^^
+
+You may have noticed that our registration line is virtually the same
+as the one for wine, with ``MZ`` as the magic number and no offset.
+This means that if you have both wine and mono installed, only one
+of them will work, depending on which one was registered last.
+
+To solve this problem, you can use a wrapper script for either wine
+or mono that checks the file type and invokes the correct interpreter.
+For example, ``file`` is able to distinguish between .NET CLR binaries
+and regular Windows binaries.
-- 
2.49.0.windows.1