git.ozlabs.org Git - petitboot/blob - ui/ncurses/nc-config.c

   1 /*
   2  *  Copyright (C) 2013 IBM Corporation
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; version 2 of the License.
   7  *
   8  *  This program is distributed in the hope that it will be useful,
   9  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *  GNU General Public License for more details.
  12  *
  13  *  You should have received a copy of the GNU General Public License
  14  *  along with this program; if not, write to the Free Software
  15  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  16  */
  17
  18 #if defined(HAVE_CONFIG_H)
  19 #include "config.h"
  20 #endif
  21
  22 #include <errno.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include <pb-config/pb-config.h>
  27 #include <talloc/talloc.h>
  28 #include <types/types.h>
  29 #include <log/log.h>
  30
  31 #include "nc-cui.h"
  32 #include "nc-config.h"
  33 #include "nc-widgets.h"
  34
  35 #define N_FIELDS        23
  36
  37 enum net_conf_type {
  38         NET_CONF_TYPE_DHCP_ALL,
  39         NET_CONF_TYPE_DHCP_ONE,
  40         NET_CONF_TYPE_STATIC,
  41 };
  42
  43 struct config_screen {
  44         struct nc_scr           scr;
  45         struct cui              *cui;
  46         struct nc_widgetset     *widgetset;
  47         WINDOW                  *pad;
  48
  49         bool                    exit;
  50         void                    (*on_exit)(struct cui *);
  51
  52         int                     scroll_y;
  53
  54         int                     label_x;
  55         int                     field_x;
  56         int                     network_config_y;
  57
  58         enum net_conf_type      net_conf_type;
  59
  60         struct {
  61                 struct nc_widget_checkbox       *autoboot_f;
  62                 struct nc_widget_label          *autoboot_l;
  63                 struct nc_widget_textbox        *timeout_f;
  64                 struct nc_widget_label          *timeout_l;
  65                 struct nc_widget_label          *timeout_help_l;
  66
  67                 struct nc_widget_label          *network_l;
  68                 struct nc_widget_select         *network_f;
  69
  70                 struct nc_widget_label          *iface_l;
  71                 struct nc_widget_select         *iface_f;
  72                 struct nc_widget_label          *ip_addr_l;
  73                 struct nc_widget_textbox        *ip_addr_f;
  74                 struct nc_widget_label          *ip_mask_l;
  75                 struct nc_widget_textbox        *ip_mask_f;
  76                 struct nc_widget_label          *ip_addr_mask_help_l;
  77                 struct nc_widget_label          *gateway_l;
  78                 struct nc_widget_textbox        *gateway_f;
  79                 struct nc_widget_label          *gateway_help_l;
  80                 struct nc_widget_label          *dns_l;
  81                 struct nc_widget_textbox        *dns_f;
  82                 struct nc_widget_label          *dns_dhcp_help_l;
  83                 struct nc_widget_label          *dns_help_l;
  84
  85                 struct nc_widget_button         *ok_b;
  86                 struct nc_widget_button         *cancel_b;
  87         } widgets;
  88 };
  89
  90 static struct config_screen *config_screen_from_scr(struct nc_scr *scr)
  91 {
  92         struct config_screen *config_screen;
  93
  94         assert(scr->sig == pb_config_screen_sig);
  95         config_screen = (struct config_screen *)
  96                 ((char *)scr - (size_t)&((struct config_screen *)0)->scr);
  97         assert(config_screen->scr.sig == pb_config_screen_sig);
  98         return config_screen;
  99 }
 100
 101 static void pad_refresh(struct config_screen *screen)
 102 {
 103         int y, x, rows, cols;
 104
 105         getmaxyx(screen->scr.sub_ncw, rows, cols);
 106         getbegyx(screen->scr.sub_ncw, y, x);
 107
 108         prefresh(screen->pad, screen->scroll_y, 0, y, x, rows, cols);
 109 }
 110
 111 static void config_screen_process_key(struct nc_scr *scr, int key)
 112 {
 113         struct config_screen *screen = config_screen_from_scr(scr);
 114         bool handled;
 115
 116         handled = widgetset_process_key(screen->widgetset, key);
 117         if (screen->exit)
 118                 screen->on_exit(screen->cui);
 119         else if (handled)
 120                 pad_refresh(screen);
 121 }
 122
 123 static void config_screen_resize(struct nc_scr *scr)
 124 {
 125         struct config_screen *screen = config_screen_from_scr(scr);
 126         (void)screen;
 127 }
 128
 129 static int config_screen_post(struct nc_scr *scr)
 130 {
 131         struct config_screen *screen = config_screen_from_scr(scr);
 132         widgetset_post(screen->widgetset);
 133         nc_scr_frame_draw(scr);
 134         pad_refresh(screen);
 135         return 0;
 136 }
 137
 138 static int config_screen_unpost(struct nc_scr *scr)
 139 {
 140         struct config_screen *screen = config_screen_from_scr(scr);
 141         widgetset_unpost(screen->widgetset);
 142         return 0;
 143 }
 144
 145 struct nc_scr *config_screen_scr(struct config_screen *screen)
 146 {
 147         return &screen->scr;
 148 }
 149
 150 static int screen_process_form(struct config_screen *screen)
 151 {
 152         const struct system_info *sysinfo = screen->cui->sysinfo;
 153         struct config *config = talloc_zero(screen, struct config);
 154         enum net_conf_type net_conf_type;
 155         struct interface_config *iface;
 156         char *str, *end;
 157         int rc;
 158
 159         config_set_defaults(config);
 160
 161         config->autoboot_enabled =
 162                 widget_checkbox_get_value(screen->widgets.autoboot_f);
 163
 164
 165         str = widget_textbox_get_value(screen->widgets.timeout_f);
 166         if (str) {
 167                 unsigned long x;
 168                 errno = 0;
 169                 x = strtoul(str, &end, 10);
 170                 if (!errno && end != str)
 171                         config->autoboot_timeout_sec = x;
 172         }
 173
 174         net_conf_type = widget_select_get_value(screen->widgets.network_f);
 175
 176         /* if we don't have any network interfaces, prevent per-interface
 177          * configuration */
 178         if (sysinfo->n_interfaces == 0)
 179                 net_conf_type = NET_CONF_TYPE_DHCP_ALL;
 180
 181         if (net_conf_type == NET_CONF_TYPE_DHCP_ALL) {
 182                 config->network.n_interfaces = 0;
 183
 184         } else {
 185                 int idx;
 186
 187                 iface = talloc_zero(config, struct interface_config);
 188                 config->network.n_interfaces = 1;
 189                 config->network.interfaces = talloc_array(config,
 190                                 struct interface_config *, 1);
 191                 config->network.interfaces[0] = iface;
 192
 193                 /* copy hwaddr (from the sysinfo interface data) to
 194                  * the configuration */
 195                 idx = widget_select_get_value(screen->widgets.iface_f);
 196                 memcpy(iface->hwaddr, sysinfo->interfaces[idx]->hwaddr,
 197                                 sizeof(iface->hwaddr));
 198         }
 199
 200         if (net_conf_type == NET_CONF_TYPE_DHCP_ONE) {
 201                 iface->method = CONFIG_METHOD_DHCP;
 202         }
 203
 204         if (net_conf_type == NET_CONF_TYPE_STATIC) {
 205                 iface->method = CONFIG_METHOD_STATIC;
 206                 iface->static_config.address = talloc_asprintf(iface, "%s/%s",
 207                                 widget_textbox_get_value(
 208                                         screen->widgets.ip_addr_f),
 209                                 widget_textbox_get_value(
 210                                         screen->widgets.ip_mask_f));
 211                 iface->static_config.gateway = talloc_strdup(iface,
 212                                 widget_textbox_get_value(
 213                                         screen->widgets.gateway_f));
 214         }
 215
 216         str = widget_textbox_get_value(screen->widgets.dns_f);
 217         if (str && strlen(str)) {
 218                 char *dns, *tmp;
 219                 int i;
 220
 221                 for (;;) {
 222                         dns = strtok_r(str, " \t", &tmp);
 223
 224                         if (!dns)
 225                                 break;
 226
 227                         i = config->network.n_dns_servers++;
 228                         config->network.dns_servers = talloc_realloc(config,
 229                                         config->network.dns_servers,
 230                                         const char *,
 231                                         config->network.n_dns_servers);
 232                         config->network.dns_servers[i] =
 233                                 talloc_strdup(config, dns);
 234
 235                         str = NULL;
 236                 }
 237         }
 238
 239         rc = cui_send_config(screen->cui, config);
 240         talloc_free(config);
 241
 242         if (rc)
 243                 pb_log("cui_send_config failed!\n");
 244         else
 245                 pb_debug("config sent!\n");
 246
 247         return 0;
 248 }
 249
 250 static void ok_click(void *arg)
 251 {
 252         struct config_screen *screen = arg;
 253         screen_process_form(screen);
 254         screen->exit = true;
 255 }
 256
 257 static void cancel_click(void *arg)
 258 {
 259         struct config_screen *screen = arg;
 260         screen->exit = true;
 261 }
 262
 263 static int layout_pair(struct config_screen *screen, int y,
 264                 struct nc_widget_label *label,
 265                 struct nc_widget *field)
 266 {
 267         struct nc_widget *label_w = widget_label_base(label);
 268         widget_move(label_w, y, screen->label_x);
 269         widget_move(field, y, screen->field_x);
 270         return max(widget_height(label_w), widget_height(field));
 271 }
 272
 273 static void config_screen_layout_widgets(struct config_screen *screen,
 274                 enum net_conf_type net_conf)
 275 {
 276         struct nc_widget *wl, *wf, *wh;
 277         int y, x, help_x;
 278         bool show;
 279
 280         y = 1;
 281         help_x = screen->field_x + 2 +
 282                 widget_width(widget_textbox_base(screen->widgets.dns_f));
 283
 284         y += layout_pair(screen, y, screen->widgets.autoboot_l,
 285                         widget_checkbox_base(screen->widgets.autoboot_f));
 286
 287         wf = widget_textbox_base(screen->widgets.timeout_f);
 288         widget_move(widget_label_base(screen->widgets.timeout_l),
 289                         y, screen->label_x);
 290         widget_move(wf, y, screen->field_x);
 291         widget_move(widget_label_base(screen->widgets.timeout_help_l),
 292                         y, screen->field_x + widget_width(wf) + 1);
 293
 294         y += 2;
 295
 296         y += layout_pair(screen, y, screen->widgets.network_l,
 297                         widget_select_base(screen->widgets.network_f));
 298
 299         y += 1;
 300
 301         /* conditionally show iface select */
 302         wl = widget_label_base(screen->widgets.iface_l);
 303         wf = widget_select_base(screen->widgets.iface_f);
 304
 305         show = net_conf == NET_CONF_TYPE_DHCP_ONE ||
 306                 net_conf == NET_CONF_TYPE_STATIC;
 307
 308         widget_set_visible(wl, show);
 309         widget_set_visible(wf, show);
 310
 311         if (show)
 312                 y += layout_pair(screen, y, screen->widgets.iface_l, wf) + 1;
 313
 314         /* conditionally show static IP params */
 315         show = net_conf == NET_CONF_TYPE_STATIC;
 316
 317         wl = widget_label_base(screen->widgets.ip_addr_l);
 318         wf = widget_textbox_base(screen->widgets.ip_addr_f);
 319         widget_set_visible(wl, show);
 320         widget_set_visible(wf, show);
 321         x = screen->field_x + widget_width(wf) + 1;
 322
 323         if (show)
 324                 layout_pair(screen, y, screen->widgets.ip_addr_l, wf);
 325
 326         wl = widget_label_base(screen->widgets.ip_mask_l);
 327         wf = widget_textbox_base(screen->widgets.ip_mask_f);
 328         widget_set_visible(wl, show);
 329         widget_set_visible(wf, show);
 330
 331         if (show) {
 332                 widget_move(wl, y, x);
 333                 widget_move(wf, y, x + 2);
 334         }
 335
 336         /* help for IP/mask */
 337         wh = widget_label_base(screen->widgets.ip_addr_mask_help_l);
 338         widget_set_visible(wh, show);
 339         if (show) {
 340                 widget_move(wh, y, help_x);
 341                 y++;
 342         }
 343
 344         wl = widget_label_base(screen->widgets.gateway_l);
 345         wf = widget_textbox_base(screen->widgets.gateway_f);
 346         wh = widget_label_base(screen->widgets.gateway_help_l);
 347         widget_set_visible(wl, show);
 348         widget_set_visible(wf, show);
 349         widget_set_visible(wh, show);
 350
 351         if (show) {
 352                 layout_pair(screen, y, screen->widgets.gateway_l, wf);
 353                 widget_move(wh, y, help_x);
 354                 y++;
 355         }
 356
 357         wh = widget_label_base(screen->widgets.dns_help_l);
 358         layout_pair(screen, y, screen->widgets.dns_l,
 359                         widget_textbox_base(screen->widgets.dns_f));
 360         widget_move(wh, y, help_x);
 361         y++;
 362
 363         /* we show the DNS/DHCP help if we're configuring DHCP */
 364         show = net_conf != NET_CONF_TYPE_STATIC;
 365         wl = widget_label_base(screen->widgets.dns_dhcp_help_l);
 366         widget_set_visible(wl, show);
 367         if (show) {
 368                 widget_move(wl, y, screen->field_x);
 369                 y += 1;
 370         }
 371
 372         y += 1;
 373
 374         widget_move(widget_button_base(screen->widgets.ok_b),
 375                         y, screen->field_x);
 376         widget_move(widget_button_base(screen->widgets.cancel_b),
 377                         y, screen->field_x + 10);
 378 }
 379
 380 static void config_screen_network_change(void *arg, int value)
 381 {
 382         struct config_screen *screen = arg;
 383         screen->net_conf_type = value;
 384         widgetset_unpost(screen->widgetset);
 385         config_screen_layout_widgets(screen, value);
 386         widgetset_post(screen->widgetset);
 387 }
 388
 389 static struct interface_config *first_active_interface(
 390                 const struct config *config)
 391 {
 392         unsigned int i;
 393
 394         for (i = 0; i < config->network.n_interfaces; i++) {
 395                 if (config->network.interfaces[i]->ignore)
 396                         continue;
 397                 return config->network.interfaces[i];
 398         }
 399         return NULL;
 400 }
 401
 402 static enum net_conf_type find_net_conf_type(const struct config *config)
 403 {
 404         struct interface_config *ifcfg;
 405
 406         ifcfg = first_active_interface(config);
 407
 408         if (!ifcfg)
 409                 return NET_CONF_TYPE_DHCP_ALL;
 410
 411         else if (ifcfg->method == CONFIG_METHOD_DHCP)
 412                 return NET_CONF_TYPE_DHCP_ONE;
 413
 414         else if (ifcfg->method == CONFIG_METHOD_STATIC)
 415                 return NET_CONF_TYPE_STATIC;
 416
 417         assert(0);
 418         return NET_CONF_TYPE_DHCP_ALL;
 419 }
 420
 421 static void config_screen_setup_empty(struct config_screen *screen)
 422 {
 423         widget_new_label(screen->widgetset, 2, screen->field_x,
 424                         "Waiting for configuration data...");
 425         screen->widgets.cancel_b = widget_new_button(screen->widgetset,
 426                         4, screen->field_x, 6, "Cancel", cancel_click, screen);
 427 }
 428
 429
 430 static void config_screen_setup_widgets(struct config_screen *screen,
 431                 const struct config *config,
 432                 const struct system_info *sysinfo)
 433 {
 434         struct nc_widgetset *set = screen->widgetset;
 435         struct interface_config *ifcfg;
 436         char *str, *ip, *mask, *gw;
 437         enum net_conf_type type;
 438         unsigned int i;
 439
 440         build_assert(sizeof(screen->widgets) / sizeof(struct widget *)
 441                         == N_FIELDS);
 442
 443         type = screen->net_conf_type;
 444         ifcfg = first_active_interface(config);
 445
 446         screen->widgets.autoboot_l = widget_new_label(set, 0, 0, "Autoboot:");
 447         screen->widgets.autoboot_f = widget_new_checkbox(set, 0, 0,
 448                                         config->autoboot_enabled);
 449
 450         str = talloc_asprintf(screen, "%d", config->autoboot_timeout_sec);
 451         screen->widgets.timeout_l = widget_new_label(set, 0, 0, "Timeout:");
 452         screen->widgets.timeout_f = widget_new_textbox(set, 0, 0, 5, str);
 453         screen->widgets.timeout_help_l = widget_new_label(set, 0, 0, "seconds");
 454
 455         screen->widgets.network_l = widget_new_label(set, 0, 0, "Network");
 456         screen->widgets.network_f = widget_new_select(set, 0, 0, 50);
 457
 458         widget_select_add_option(screen->widgets.network_f,
 459                                         NET_CONF_TYPE_DHCP_ALL,
 460                                         "DHCP on all active interfaces",
 461                                         type == NET_CONF_TYPE_DHCP_ALL);
 462         widget_select_add_option(screen->widgets.network_f,
 463                                         NET_CONF_TYPE_DHCP_ONE,
 464                                         "DHCP on a specific interface",
 465                                         type == NET_CONF_TYPE_DHCP_ONE);
 466         widget_select_add_option(screen->widgets.network_f,
 467                                         NET_CONF_TYPE_STATIC,
 468                                         "Static IP configuration",
 469                                         type == NET_CONF_TYPE_STATIC);
 470
 471         widget_select_on_change(screen->widgets.network_f,
 472                         config_screen_network_change, screen);
 473
 474         screen->widgets.iface_l = widget_new_label(set, 0, 0, "Device:");
 475         screen->widgets.iface_f = widget_new_select(set, 0, 0, 50);
 476
 477         for (i = 0; i < sysinfo->n_interfaces; i++) {
 478                 struct interface_info *info = sysinfo->interfaces[i];
 479                 char str[50], mac[20];
 480                 bool is_default;
 481
 482                 is_default = ifcfg && !memcmp(ifcfg->hwaddr, info->hwaddr,
 483                                         sizeof(ifcfg->hwaddr));
 484
 485                 mac_str(info->hwaddr, info->hwaddr_size, mac, sizeof(mac));
 486                 snprintf(str, sizeof(str), "%s [%s, %s]", info->name, mac,
 487                                 info->link ? "link up" : "link down");
 488
 489                 widget_select_add_option(screen->widgets.iface_f,
 490                                                 i, str, is_default);
 491         }
 492
 493         gw = ip = mask = NULL;
 494         if (ifcfg && ifcfg->method == CONFIG_METHOD_STATIC) {
 495                 char *sep;
 496
 497                 str = talloc_strdup(screen, ifcfg->static_config.address);
 498                 sep = strchr(str, '/');
 499                 ip = str;
 500
 501                 if (sep) {
 502                         *sep = '\0';
 503                         mask = sep + 1;
 504                 }
 505                 gw = ifcfg->static_config.gateway;
 506         }
 507
 508         screen->widgets.ip_addr_l = widget_new_label(set, 0, 0, "IP/mask:");
 509         screen->widgets.ip_addr_f = widget_new_textbox(set, 0, 0, 16, ip);
 510         screen->widgets.ip_mask_l = widget_new_label(set, 0, 0, "/");
 511         screen->widgets.ip_mask_f = widget_new_textbox(set, 0, 0, 3, mask);
 512         screen->widgets.ip_addr_mask_help_l =
 513                 widget_new_label(set, 0, 0, "(eg. 192.168.0.10 / 24)");
 514
 515         screen->widgets.gateway_l = widget_new_label(set, 0, 0, "Gateway:");
 516         screen->widgets.gateway_f = widget_new_textbox(set, 0, 0, 16, gw);
 517         screen->widgets.gateway_help_l =
 518                 widget_new_label(set, 0, 0, "(eg. 192.168.0.1)");
 519
 520         str = talloc_strdup(screen, "");
 521         for (i = 0; i < config->network.n_dns_servers; i++) {
 522                 str = talloc_asprintf_append(str, "%s%s",
 523                                 (i == 0) ? "" : " ",
 524                                 config->network.dns_servers[i]);
 525         }
 526
 527         screen->widgets.dns_l = widget_new_label(set, 0, 0, "DNS Server(s):");
 528         screen->widgets.dns_f = widget_new_textbox(set, 0, 0, 32, str);
 529         screen->widgets.dns_help_l =
 530                 widget_new_label(set, 0, 0, "(eg. 192.168.0.2)");
 531
 532         screen->widgets.dns_dhcp_help_l = widget_new_label(set, 0, 0,
 533                         "(if not provided by DHCP server)");
 534
 535         screen->widgets.ok_b = widget_new_button(set, 0, 0, 6, "OK",
 536                         ok_click, screen);
 537         screen->widgets.cancel_b = widget_new_button(set, 0, 0, 6, "Cancel",
 538                         cancel_click, screen);
 539 }
 540
 541 static void config_screen_widget_focus(struct nc_widget *widget, void *arg)
 542 {
 543         struct config_screen *screen = arg;
 544         int w_y, s_max;
 545
 546         w_y = widget_y(widget) + widget_focus_y(widget);
 547         s_max = getmaxy(screen->scr.sub_ncw) - 1;
 548
 549         if (w_y < screen->scroll_y)
 550                 screen->scroll_y = w_y;
 551
 552         else if (w_y + screen->scroll_y + 1 > s_max)
 553                 screen->scroll_y = 1 + w_y - s_max;
 554
 555         else
 556                 return;
 557
 558         pad_refresh(screen);
 559 }
 560
 561
 562 void config_screen_update(struct config_screen *screen,
 563                 const struct config *config,
 564                 const struct system_info *sysinfo)
 565 {
 566         bool repost = false;
 567         int height;
 568
 569         /* The size of the pad we'll need depends on the number of interfaces.
 570          *
 571          * We use N_FIELDS (which is quite conservative, as some fields share
 572          * a line) as a base, then add 3 (as the network select field is
 573          * takes 3 lines), and n_interfaces (as the network interface field
 574          * has n_interfaces lines).
 575          */
 576         height = N_FIELDS + 3;
 577         if (sysinfo)
 578                 height += sysinfo->n_interfaces;
 579         if (!screen->pad || getmaxy(screen->pad) < height) {
 580                 if (screen->pad)
 581                         delwin(screen->pad);
 582                 screen->pad = newpad(height, COLS);
 583         }
 584
 585         if (screen->widgetset) {
 586                 widgetset_unpost(screen->widgetset);
 587                 talloc_free(screen->widgetset);
 588                 repost = true;
 589         }
 590
 591         screen->widgetset = widgetset_create(screen, screen->scr.main_ncw,
 592                         screen->pad);
 593         widgetset_set_widget_focus(screen->widgetset,
 594                         config_screen_widget_focus, screen);
 595
 596         if (!config || !sysinfo) {
 597                 config_screen_setup_empty(screen);
 598         } else {
 599                 screen->net_conf_type = find_net_conf_type(config);
 600
 601                 config_screen_setup_widgets(screen, config, sysinfo);
 602                 config_screen_layout_widgets(screen, screen->net_conf_type);
 603         }
 604
 605         if (repost)
 606                 widgetset_post(screen->widgetset);
 607
 608         pad_refresh(screen);
 609 }
 610
 611 static int config_screen_destroy(void *arg)
 612 {
 613         struct config_screen *screen = arg;
 614         if (screen->pad)
 615                 delwin(screen->pad);
 616         return 0;
 617 }
 618
 619 struct config_screen *config_screen_init(struct cui *cui,
 620                 const struct config *config,
 621                 const struct system_info *sysinfo,
 622                 void (*on_exit)(struct cui *))
 623 {
 624         struct config_screen *screen;
 625
 626         screen = talloc_zero(cui, struct config_screen);
 627         talloc_set_destructor(screen, config_screen_destroy);
 628         nc_scr_init(&screen->scr, pb_config_screen_sig, 0,
 629                         cui, config_screen_process_key,
 630                         config_screen_post, config_screen_unpost,
 631                         config_screen_resize);
 632
 633         screen->cui = cui;
 634         screen->on_exit = on_exit;
 635         screen->label_x = 2;
 636         screen->field_x = 17;
 637
 638         screen->scr.frame.ltitle = talloc_strdup(screen,
 639                         "Petitboot System Configuration");
 640         screen->scr.frame.rtitle = NULL;
 641         screen->scr.frame.help = talloc_strdup(screen,
 642                         "tab=next, shift+tab=previous");
 643         nc_scr_frame_draw(&screen->scr);
 644
 645         scrollok(screen->scr.sub_ncw, true);
 646
 647         config_screen_update(screen, config, sysinfo);
 648
 649         wrefresh(screen->scr.main_ncw);
 650
 651         return screen;
 652 }