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

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: Changbin Du <changbin.du@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

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 a4670f4e825a..ac92c0ded6c5 100644
--- a/scripts/kconfig/nconf.c
+++ b/scripts/kconfig/nconf.c
@@ -1048,7 +1048,7 @@ 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 7be620a1fcdb..77f525a8617c 100644
--- a/scripts/kconfig/nconf.gui.c
+++ b/scripts/kconfig/nconf.gui.c
@@ -439,7 +439,8 @@ 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],