[PATCH] kconfig/[mn]conf: handle backspace (^H) key

[Sébastien Szymanski]

This is in the mainline kernel since v5.1-rc3:
9c38f1f04408 ("kconfig/[mn]conf: handle backspace (^H) key")

Quoting the commit's log:

"
Backspace is not working on some terminal emulators which do not send the
key code defined by terminfo. Terminals either send '^H' (8) or '^?' (127).
But currently only '^?' is handled. Let's also handle '^H' for those
terminals.
"

Signed-off-by: Sébastien Szymanski <sebastien.szymanski at armadeus.com>
---
 scripts/kconfig/lxdialog/inputbox.c | 3 ++-
 scripts/kconfig/nconf.c             | 2 +-
 scripts/kconfig/nconf.gui.c         | 3 ++-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/scripts/kconfig/lxdialog/inputbox.c b/scripts/kconfig/lxdialog/inputbox.c
index 611945611bf8..1dcfb288ee63 100644
--- a/scripts/kconfig/lxdialog/inputbox.c
+++ b/scripts/kconfig/lxdialog/inputbox.c
@@ -113,7 +113,8 @@ do_resize:
 			case KEY_DOWN:
 				break;
 			case KEY_BACKSPACE:
-			case 127:
+			case 8:   /* ^H */
+			case 127: /* ^? */
 				if (pos) {
 					wattrset(dialog, dlg.inputbox.atr);
 					if (input_x == 0) {
diff --git a/scripts/kconfig/nconf.c b/scripts/kconfig/nconf.c
index ca878212f0ab..8aba4c38cc71 100644
--- a/scripts/kconfig/nconf.c
+++ b/scripts/kconfig/nconf.c
@@ -1046,7 +1046,7 @@ static int do_match(int key, struct match_state *state, int *ans)
 		state->match_direction = FIND_NEXT_MATCH_UP;
 		*ans = get_mext_match(state->pattern,
 				state->match_direction);
-	} else if (key == KEY_BACKSPACE || key == 127) {
+	} else if (key == KEY_BACKSPACE || key == 8 || key == 127) {
 		state->pattern[strlen(state->pattern)-1] = '\0';
 		adj_match_dir(&state->match_direction);
 	} else
diff --git a/scripts/kconfig/nconf.gui.c b/scripts/kconfig/nconf.gui.c
index 2a3b853e7eaf..e88ee91af6aa 100644
--- a/scripts/kconfig/nconf.gui.c
+++ b/scripts/kconfig/nconf.gui.c
@@ -435,7 +435,8 @@ int dialog_inputbox(WINDOW *main_window,
 		case KEY_F(F_EXIT):
 		case KEY_F(F_BACK):
 			break;
-		case 127:
+		case 8:   /* ^H */
+		case 127: /* ^? */
 		case KEY_BACKSPACE:
 			if (cursor_position > 0) {
 				memmove(&result[cursor_position-1],

---
base-commit: 437ea9f8be5afaebe2d8cbab6242f1182857f21e
change-id: 20260227-kfconfig-backspace-8c53561ae364

Best regards,
-- 
Sébastien Szymanski <sebastien.szymanski at armadeus.com>