Document that string ARG of 'kill-emacs' might not workHEADmaster

* src/emacs.c (Fkill_emacs):
* doc/lispref/os.texi (Killing Emacs): Document that EXIT-DATA
being a string doesn't always work.  (Bug#80435)

1 files changed, 3 insertions, 1 deletions

diff --git a/src/emacs.c b/src/emacs.c
index 17c56986083..777ade9d825 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -2947,7 +2947,9 @@ sort_args (int argc, char **argv)
 DEFUN ("kill-emacs", Fkill_emacs, Skill_emacs, 0, 2, "P",
        doc: /* Exit the Emacs job and kill it.
 If ARG is an integer, return ARG as the exit program code.
-If ARG is a string, stuff it as keyboard input.
+If ARG is a string, stuff it as keyboard input.  (This might
+not work on modern systems due to security considerations, or
+not at all.)
 Any other value of ARG, or ARG omitted, means return an
 exit code that indicates successful program termination.