From 2ab33b3f31d151066a23e603bddecf0ef44da402 Mon Sep 17 00:00:00 2001
From: nicm <nicm@openbsd.org>
Date: Thu, 22 Aug 2024 05:39:55 +0000
Subject: [PATCH] Short Ctrl keys like ^A need to be converted to lowercase so
 they end up as 'a'|KEYC_CTRL to match the new internal representation.
 Problem reported by naddy@.

---
 usr.bin/tmux/key-string.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/usr.bin/tmux/key-string.c b/usr.bin/tmux/key-string.c
index d9ba95afae6..0c96738bb15 100644
--- a/usr.bin/tmux/key-string.c
+++ b/usr.bin/tmux/key-string.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: key-string.c,v 1.72 2024/08/21 04:17:09 nicm Exp $ */
+/* $OpenBSD: key-string.c,v 1.73 2024/08/22 05:39:55 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -18,6 +18,7 @@
 
 #include <sys/types.h>
 
+#include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 #include <wchar.h>
@@ -241,7 +242,7 @@ key_string_get_modifiers(const char **string)
 key_code
 key_string_lookup_string(const char *string)
 {
-	key_code		 key, modifiers;
+	key_code		 key, modifiers = 0;
 	u_int			 u, i;
 	struct utf8_data	 ud, *udp;
 	enum utf8_state		 more;
@@ -276,14 +277,18 @@ key_string_lookup_string(const char *string)
 		}
 		free(udp);
 		return (uc);
+
 	}
 
-	/* Check for modifiers. */
-	modifiers = 0;
+	/* Check for short Ctrl key. */
 	if (string[0] == '^' && string[1] != '\0') {
+		if (string[2] == '\0')
+			return (tolower((u_char)string[1])|KEYC_CTRL);
 		modifiers |= KEYC_CTRL;
 		string++;
 	}
+
+	/* Check for modifiers. */
 	modifiers |= key_string_get_modifiers(&string);
 	if (string == NULL || string[0] == '\0')
 		return (KEYC_UNKNOWN);
-- 
2.20.1