From bb9a8536831e51223791cbf095e2c3b1df575b0a Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 15 Aug 2022 16:53:46 +0100
Subject: [PATCH] prefork-interp: document -U

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 cprogs/prefork-interp.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cprogs/prefork-interp.c b/cprogs/prefork-interp.c
index dfc8aca..a643e43 100644
--- a/cprogs/prefork-interp.c
+++ b/cprogs/prefork-interp.c
@@ -6,6 +6,12 @@
  *   prefork-interp  [<option> ..] <interpreter>  [<script> [<args> ...]]
  *   prefork-interp  [<option>,..],<interpreter>   <script> [<args> ...]
  *   prefork-interp '[<option> ..] <interpreter>'  <script> [<args> ...]
+ *
+ * Options must specify argument laundering mode.
+ * Currently the only mode supported is:
+ *   -U    unlaundered: setup and executor both get all arguments and env vars
+ *         ident covers only env vars specified  with -E
+ *         ident covers only arguments interpreter and (if present) script
  */
 /*
  * Process structure:
-- 
2.30.2