From 6c677a101d16cffd1e59acf090c4769561f82a53 Mon Sep 17 00:00:00 2001
From: Lars Ingebrigtsen <larsi@gnus.org>
Date: Sat, 12 Oct 2019 23:15:43 +0200
Subject: [PATCH] Mention the Emacs exit code in batch mode

* doc/lispref/os.texi (Batch Mode): Mention what the exit code is
if an error is signalled (bug#31552).
---
 doc/lispref/os.texi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/doc/lispref/os.texi b/doc/lispref/os.texi
index 912d464b49b..93551cab0e5 100644
--- a/doc/lispref/os.texi
+++ b/doc/lispref/os.texi
@@ -2595,6 +2595,15 @@ if it is non-@code{nil}; this can be overridden by binding
 This variable is non-@code{nil} when Emacs is running in batch mode.
 @end defvar
 
+If Emacs exits due to signalling an error in batch mode, the exit
+status of the Emacs command is non-zero:
+
+@example
+$ emacs -Q --batch --eval '(error "foo")'; echo $?
+foo
+255
+@end example
+
 @node Session Management
 @section Session Management
 @cindex session manager
-- 
2.39.5