ui/ncurses: Don't modify config when clearing IPMI override

When safe mode is active the config displayed in nc-config is only a
subset of the actual config since device init has not yet occurred.
However when the "clear override" checkbox is ticked and the config
saved, the form will set the config as it is displayed, resulting in
device-specific config (eg. boot order and network settings) being
cleared. If the user only ticked the "clear override" checkbox this most
likely isn't what they intended.

Instead change the checkbox to a button which when pressed clears the
override and exits safe mode if active, without modifying the rest of
the configuration.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>

ui/ncurses/nc-config.c

@@ -84,7 +84,7 @@ struct config_screen {
 
 		struct nc_widget_label		*ipmi_type_l;
 		struct nc_widget_label		*ipmi_clear_l;
-		struct nc_widget_checkbox	*ipmi_clear_cb;
+		struct nc_widget_button		*ipmi_clear_b;
 
 		struct nc_widget_label		*network_l;
 		struct nc_widget_select		*network_f;
@@ -256,11 +256,6 @@ static int screen_process_form(struct config_screen *screen)
 			config->autoboot_timeout_sec = x;
 	}
 
-	if (screen->ipmi_override)
-		if (widget_checkbox_get_value(screen->widgets.ipmi_clear_cb))
-			config->ipmi_bootdev = IPMI_BOOTDEV_INVALID;
-
-
 	net_conf_type = widget_select_get_value(screen->widgets.network_f);
 
 	/* if we don't have any network interfaces, prevent per-interface
@@ -398,6 +393,26 @@ static void cancel_click(void *arg)
 	screen->exit = true;
 }
 
+static void ipmi_clear_click(void *arg)
+{
+	struct config_screen *screen = arg;
+	struct config *config;
+	int rc;
+
+	config = config_copy(screen, screen->cui->config);
+	config->ipmi_bootdev = IPMI_BOOTDEV_INVALID;
+	config->safe_mode = false;
+
+	rc = cui_send_config(screen->cui, config);
+	talloc_free(config);
+
+	if (rc)
+		pb_log("cui_send_config failed!\n");
+	else
+		pb_debug("config sent!\n");
+	screen->exit = true;
+}
+
 static int layout_pair(struct config_screen *screen, int y,
 		struct nc_widget_label *label,
 		struct nc_widget *field)
@@ -497,7 +512,7 @@ static void config_screen_layout_widgets(struct config_screen *screen)
 		y += 1;
 
 		wl = widget_label_base(screen->widgets.ipmi_clear_l);
-		wf = widget_checkbox_base(screen->widgets.ipmi_clear_cb);
+		wf = widget_button_base(screen->widgets.ipmi_clear_b);
 		widget_set_visible(wl, true);
 		widget_set_visible(wf, true);
 		widget_move(wl, y, screen->label_x);
@@ -937,8 +952,10 @@ static void config_screen_setup_widgets(struct config_screen *screen,
 							label);
 		screen->widgets.ipmi_clear_l = widget_new_label(set, 0, 0,
 							_("Clear option:"));
-		screen->widgets.ipmi_clear_cb = widget_new_checkbox(set, 0, 0,
-							false);
+		screen->widgets.ipmi_clear_b = widget_new_button(set, 0, 0,
+				strncols(_("Clear IPMI override now")) + 10,
+				_("Clear IPMI override now"),
+				ipmi_clear_click, screen);
 		screen->ipmi_override = true;
 	}