From: Lars Ingebrigtsen <larsi@gnus.org>
Date: Sun, 17 Apr 2022 13:46:24 +0000 (+0200)
Subject: Add a `restart-emacs' sanity check
X-Git-Tag: emacs-29.0.90~1931^2~457
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=56d5a4079423aa22d2203a342439df7359eb1c18;p=emacs.git

Add a `restart-emacs' sanity check

* src/emacs.c (Fkill_emacs): Add a sanity check for argv.
---

diff --git a/src/emacs.c b/src/emacs.c
index 173e8e8923d..a16e702ab7b 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -2807,6 +2807,10 @@ killed.  */
 
   if (!NILP (restart))
     {
+      /* This is very unlikely, but it's possible to execute a binary
+	 (on some systems) with no argv.  */
+      if (initial_argc < 1)
+	error ("No command line arguments known; unable to re-execute Emacs");
       if (execvp (*initial_argv, initial_argv) < 1)
 	error ("Unable to re-execute Emacs");
     }