From f0489d8d7ca9dcf274183ad61235c8d32a904ed4 Mon Sep 17 00:00:00 2001
From: Dante Catalfamo
Date: Thu, 29 Oct 2020 15:53:46 -0400
Subject: bsd-auth: add info on back channel debugging

---
 content/posts/WIP-how-bsd-authentication-works/index.org | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'content/posts')

diff --git a/content/posts/WIP-how-bsd-authentication-works/index.org b/content/posts/WIP-how-bsd-authentication-works/index.org
index 1a77bee..c21f0ac 100644
--- a/content/posts/WIP-how-bsd-authentication-works/index.org
+++ b/content/posts/WIP-how-bsd-authentication-works/index.org
@@ -103,7 +103,9 @@
                      wheel when using the su(1) program to become super user.
   #+END_SRC
 
-  The auth module communicates with its caller through file descriptor 3.
+  The auth module communicates with its caller through file
+  descriptor 3. Most modules also have a hidden flag =-d=, which sets
+  the back channel do =stdio=, presumably for debugging purposes.
 
 * Documentation
 
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