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        24
  36
  37 extern const char *config_help_text;
  38
  39 enum net_conf_type {
  40         NET_CONF_TYPE_DHCP_ALL,
  41         NET_CONF_TYPE_DHCP_ONE,
  42         NET_CONF_TYPE_STATIC,
  43 };
  44
  45 struct config_screen {
  46         struct nc_scr           scr;
  47         struct cui              *cui;
  48         struct nc_widgetset     *widgetset;
  49         WINDOW                  *pad;
  50
  51         bool                    exit;
  52         bool                    show_help;
  53         void                    (*on_exit)(struct cui *);
  54
  55         int                     scroll_y;
  56
  57         int                     label_x;
  58         int                     field_x;
  59         int                     network_config_y;
  60
  61         enum net_conf_type      net_conf_type;
  62
  63         struct {
  64                 struct nc_widget_checkbox       *autoboot_f;
  65                 struct nc_widget_label          *autoboot_l;
  66                 struct nc_widget_textbox        *timeout_f;
  67                 struct nc_widget_label          *timeout_l;
  68                 struct nc_widget_label          *timeout_help_l;
  69
  70                 struct nc_widget_label          *network_l;
  71                 struct nc_widget_select         *network_f;
  72
  73                 struct nc_widget_label          *iface_l;
  74                 struct nc_widget_select         *iface_f;
  75                 struct nc_widget_label          *ip_addr_l;
  76                 struct nc_widget_textbox        *ip_addr_f;
  77                 struct nc_widget_label          *ip_mask_l;
  78                 struct nc_widget_textbox        *ip_mask_f;
  79                 struct nc_widget_label          *ip_addr_mask_help_l;
  80                 struct nc_widget_label          *gateway_l;
  81                 struct nc_widget_textbox        *gateway_f;
  82                 struct nc_widget_label          *gateway_help_l;
  83                 struct nc_widget_label          *dns_l;
  84                 struct nc_widget_textbox        *dns_f;
  85                 struct nc_widget_label          *dns_dhcp_help_l;
  86                 struct nc_widget_label          *dns_help_l;
  87
  88                 struct nc_widget_button         *ok_b;
  89                 struct nc_widget_button         *help_b;
  90                 struct nc_widget_button         *cancel_b;
  91         } widgets;
  92 };
  93
  94 static struct config_screen *config_screen_from_scr(struct nc_scr *scr)
  95 {
  96         struct config_screen *config_screen;
  97
  98         assert(scr->sig == pb_config_screen_sig);
  99         config_screen = (struct config_screen *)
 100                 ((char *)scr - (size_t)&((struct config_screen *)0)->scr);
 101         assert(config_screen->scr.sig == pb_config_screen_sig);
 102         return config_screen;
 103 }
 104
 105 static void pad_refresh(struct config_screen *screen)
 106 {
 107         int y, x, rows, cols;
 108
 109         getmaxyx(screen->scr.sub_ncw, rows, cols);
 110         getbegyx(screen->scr.sub_ncw, y, x);
 111
 112         prefresh(screen->pad, screen->scroll_y, 0, y, x, rows, cols);
 113 }
 114
 115 static void config_screen_process_key(struct nc_scr *scr, int key)
 116 {
 117         struct config_screen *screen = config_screen_from_scr(scr);
 118         bool handled;
 119
 120         handled = widgetset_process_key(screen->widgetset, key);
 121
 122         if (!handled) {
 123                 switch (key) {
 124                 case 'x':
 125                 case 27: /* esc */
 126                         screen->exit = true;
 127                         break;
 128                 case 'h':
 129                         screen->show_help = true;
 130                         break;
 131                 }
 132         }
 133
 134         if (screen->exit) {
 135                 screen->on_exit(screen->cui);
 136
 137         } else if (screen->show_help) {
 138                 screen->show_help = false;
 139                 cui_show_help(screen->cui, "System Configuration",
 140                                 config_help_text);
 141
 142         } else if (handled) {
 143                 pad_refresh(screen);
 144         }
 145 }
 146
 147 static void config_screen_resize(struct nc_scr *scr)
 148 {
 149         struct config_screen *screen = config_screen_from_scr(scr);
 150         (void)screen;
 151 }
 152
 153 static int config_screen_post(struct nc_scr *scr)
 154 {
 155         struct config_screen *screen = config_screen_from_scr(scr);
 156         widgetset_post(screen->widgetset);
 157         nc_scr_frame_draw(scr);
 158         redrawwin(scr->main_ncw);
 159         wrefresh(screen->scr.main_ncw);
 160         pad_refresh(screen);
 161         return 0;
 162 }
 163
 164 static int config_screen_unpost(struct nc_scr *scr)
 165 {
 166         struct config_screen *screen = config_screen_from_scr(scr);
 167         widgetset_unpost(screen->widgetset);
 168         return 0;
 169 }
 170
 171 struct nc_scr *config_screen_scr(struct config_screen *screen)
 172 {
 173         return &screen->scr;
 174 }
 175
 176 static int screen_process_form(struct config_screen *screen)
 177 {
 178         const struct system_info *sysinfo = screen->cui->sysinfo;
 179         enum net_conf_type net_conf_type;
 180         struct interface_config *iface;
 181         struct config *config;
 182         char *str, *end;
 183         int rc;
 184
 185         config = config_copy(screen, screen->cui->config);
 186
 187         config->autoboot_enabled =
 188                 widget_checkbox_get_value(screen->widgets.autoboot_f);
 189
 190
 191         str = widget_textbox_get_value(screen->widgets.timeout_f);
 192         if (str) {
 193                 unsigned long x;
 194                 errno = 0;
 195                 x = strtoul(str, &end, 10);
 196                 if (!errno && end != str)
 197                         config->autoboot_timeout_sec = x;
 198         }
 199
 200         net_conf_type = widget_select_get_value(screen->widgets.network_f);
 201
 202         /* if we don't have any network interfaces, prevent per-interface
 203          * configuration */
 204         if (sysinfo->n_interfaces == 0)
 205                 net_conf_type = NET_CONF_TYPE_DHCP_ALL;
 206
 207         if (net_conf_type == NET_CONF_TYPE_DHCP_ALL) {
 208                 config->network.n_interfaces = 0;
 209
 210         } else {
 211                 int idx;
 212
 213                 iface = talloc_zero(config, struct interface_config);
 214                 config->network.n_interfaces = 1;
 215                 config->network.interfaces = talloc_array(config,
 216                                 struct interface_config *, 1);
 217                 config->network.interfaces[0] = iface;
 218
 219                 /* copy hwaddr (from the sysinfo interface data) to
 220                  * the configuration */
 221                 idx = widget_select_get_value(screen->widgets.iface_f);
 222                 memcpy(iface->hwaddr, sysinfo->interfaces[idx]->hwaddr,
 223                                 sizeof(iface->hwaddr));
 224         }
 225
 226         if (net_conf_type == NET_CONF_TYPE_DHCP_ONE) {
 227                 iface->method = CONFIG_METHOD_DHCP;
 228         }
 229
 230         if (net_conf_type == NET_CONF_TYPE_STATIC) {
 231                 char *ip, *mask, *gateway;
 232
 233                 ip = widget_textbox_get_value(screen->widgets.ip_addr_f);
 234                 mask = widget_textbox_get_value(screen->widgets.ip_mask_f);
 235                 gateway = widget_textbox_get_value(screen->widgets.gateway_f);
 236
 237                 if (!ip || !*ip || !mask || !*mask) {
 238                         screen->scr.frame.status =
 239                                 "No IP / mask values are set";
 240                         nc_scr_frame_draw(&screen->scr);
 241                         talloc_free(config);
 242                         return -1;
 243                 }
 244
 245                 iface->method = CONFIG_METHOD_STATIC;
 246                 iface->static_config.address = talloc_asprintf(iface, "%s/%s",
 247                                 ip, mask);
 248                 iface->static_config.gateway = talloc_strdup(iface, gateway);
 249         }
 250
 251         str = widget_textbox_get_value(screen->widgets.dns_f);
 252         talloc_free(config->network.dns_servers);
 253         config->network.dns_servers = NULL;
 254         config->network.n_dns_servers = 0;
 255
 256         if (str && strlen(str)) {
 257                 char *dns, *tmp;
 258                 int i;
 259
 260                 for (;;) {
 261                         dns = strtok_r(str, " \t", &tmp);
 262
 263                         if (!dns)
 264                                 break;
 265
 266                         i = config->network.n_dns_servers++;
 267                         config->network.dns_servers = talloc_realloc(config,
 268                                         config->network.dns_servers,
 269                                         const char *,
 270                                         config->network.n_dns_servers);
 271                         config->network.dns_servers[i] =
 272                                 talloc_strdup(config, dns);
 273
 274                         str = NULL;
 275                 }
 276         }
 277
 278         rc = cui_send_config(screen->cui, config);
 279         talloc_free(config);
 280
 281         if (rc)
 282                 pb_log("cui_send_config failed!\n");
 283         else
 284                 pb_debug("config sent!\n");
 285
 286         return 0;
 287 }
 288
 289 static void ok_click(void *arg)
 290 {
 291         struct config_screen *screen = arg;
 292         if (screen_process_form(screen))
 293                 /* errors are written to the status line, so we'll need
 294                  * to refresh */
 295                 wrefresh(screen->scr.main_ncw);
 296         else
 297                 screen->exit = true;
 298 }
 299
 300 static void help_click(void *arg)
 301 {
 302         struct config_screen *screen = arg;
 303         screen->show_help = true;
 304 }
 305
 306 static void cancel_click(void *arg)
 307 {
 308         struct config_screen *screen = arg;
 309         screen->exit = true;
 310 }
 311
 312 static int layout_pair(struct config_screen *screen, int y,
 313                 struct nc_widget_label *label,
 314                 struct nc_widget *field)
 315 {
 316         struct nc_widget *label_w = widget_label_base(label);
 317         widget_move(label_w, y, screen->label_x);
 318         widget_move(field, y, screen->field_x);
 319         return max(widget_height(label_w), widget_height(field));
 320 }
 321
 322 static void config_screen_layout_widgets(struct config_screen *screen,
 323                 enum net_conf_type net_conf)
 324 {
 325         struct nc_widget *wl, *wf, *wh;
 326         int y, x, help_x;
 327         bool show;
 328
 329         y = 1;
 330         help_x = screen->field_x + 2 +
 331                 widget_width(widget_textbox_base(screen->widgets.dns_f));
 332
 333         y += layout_pair(screen, y, screen->widgets.autoboot_l,
 334                         widget_checkbox_base(screen->widgets.autoboot_f));
 335
 336         wf = widget_textbox_base(screen->widgets.timeout_f);
 337         widget_move(widget_label_base(screen->widgets.timeout_l),
 338                         y, screen->label_x);
 339         widget_move(wf, y, screen->field_x);
 340         widget_move(widget_label_base(screen->widgets.timeout_help_l),
 341                         y, screen->field_x + widget_width(wf) + 1);
 342
 343         y += 2;
 344
 345         y += layout_pair(screen, y, screen->widgets.network_l,
 346                         widget_select_base(screen->widgets.network_f));
 347
 348         y += 1;
 349
 350         /* conditionally show iface select */
 351         wl = widget_label_base(screen->widgets.iface_l);
 352         wf = widget_select_base(screen->widgets.iface_f);
 353
 354         show = net_conf == NET_CONF_TYPE_DHCP_ONE ||
 355                 net_conf == NET_CONF_TYPE_STATIC;
 356
 357         widget_set_visible(wl, show);
 358         widget_set_visible(wf, show);
 359
 360         if (show)
 361                 y += layout_pair(screen, y, screen->widgets.iface_l, wf) + 1;
 362
 363         /* conditionally show static IP params */
 364         show = net_conf == NET_CONF_TYPE_STATIC;
 365
 366         wl = widget_label_base(screen->widgets.ip_addr_l);
 367         wf = widget_textbox_base(screen->widgets.ip_addr_f);
 368         widget_set_visible(wl, show);
 369         widget_set_visible(wf, show);
 370         x = screen->field_x + widget_width(wf) + 1;
 371
 372         if (show)
 373                 layout_pair(screen, y, screen->widgets.ip_addr_l, wf);
 374
 375         wl = widget_label_base(screen->widgets.ip_mask_l);
 376         wf = widget_textbox_base(screen->widgets.ip_mask_f);
 377         widget_set_visible(wl, show);
 378         widget_set_visible(wf, show);
 379
 380         if (show) {
 381                 widget_move(wl, y, x);
 382                 widget_move(wf, y, x + 2);
 383         }
 384
 385         /* help for IP/mask */
 386         wh = widget_label_base(screen->widgets.ip_addr_mask_help_l);
 387         widget_set_visible(wh, show);
 388         if (show) {
 389                 widget_move(wh, y, help_x);
 390                 y++;
 391         }
 392
 393         wl = widget_label_base(screen->widgets.gateway_l);
 394         wf = widget_textbox_base(screen->widgets.gateway_f);
 395         wh = widget_label_base(screen->widgets.gateway_help_l);
 396         widget_set_visible(wl, show);
 397         widget_set_visible(wf, show);
 398         widget_set_visible(wh, show);
 399
 400         if (show) {
 401                 layout_pair(screen, y, screen->widgets.gateway_l, wf);
 402                 widget_move(wh, y, help_x);
 403                 y++;
 404         }
 405
 406         wh = widget_label_base(screen->widgets.dns_help_l);
 407         layout_pair(screen, y, screen->widgets.dns_l,
 408                         widget_textbox_base(screen->widgets.dns_f));
 409         widget_move(wh, y, help_x);
 410         y++;
 411
 412         /* we show the DNS/DHCP help if we're configuring DHCP */
 413         show = net_conf != NET_CONF_TYPE_STATIC;
 414         wl = widget_label_base(screen->widgets.dns_dhcp_help_l);
 415         widget_set_visible(wl, show);
 416         if (show) {
 417                 widget_move(wl, y, screen->field_x);
 418                 y += 1;
 419         }
 420
 421         y += 1;
 422
 423         widget_move(widget_button_base(screen->widgets.ok_b),
 424                         y, screen->field_x);
 425         widget_move(widget_button_base(screen->widgets.help_b),
 426                         y, screen->field_x + 10);
 427         widget_move(widget_button_base(screen->widgets.cancel_b),
 428                         y, screen->field_x + 20);
 429 }
 430
 431 static void config_screen_network_change(void *arg, int value)
 432 {
 433         struct config_screen *screen = arg;
 434         screen->net_conf_type = value;
 435         widgetset_unpost(screen->widgetset);
 436         config_screen_layout_widgets(screen, value);
 437         widgetset_post(screen->widgetset);
 438 }
 439
 440 static struct interface_config *first_active_interface(
 441                 const struct config *config)
 442 {
 443         unsigned int i;
 444
 445         for (i = 0; i < config->network.n_interfaces; i++) {
 446                 if (config->network.interfaces[i]->ignore)
 447                         continue;
 448                 return config->network.interfaces[i];
 449         }
 450         return NULL;
 451 }
 452
 453 static enum net_conf_type find_net_conf_type(const struct config *config)
 454 {
 455         struct interface_config *ifcfg;
 456
 457         ifcfg = first_active_interface(config);
 458
 459         if (!ifcfg)
 460                 return NET_CONF_TYPE_DHCP_ALL;
 461
 462         else if (ifcfg->method == CONFIG_METHOD_DHCP)
 463                 return NET_CONF_TYPE_DHCP_ONE;
 464
 465         else if (ifcfg->method == CONFIG_METHOD_STATIC)
 466                 return NET_CONF_TYPE_STATIC;
 467
 468         assert(0);
 469         return NET_CONF_TYPE_DHCP_ALL;
 470 }
 471
 472 static void config_screen_setup_empty(struct config_screen *screen)
 473 {
 474         widget_new_label(screen->widgetset, 2, screen->field_x,
 475                         "Waiting for configuration data...");
 476         screen->widgets.cancel_b = widget_new_button(screen->widgetset,
 477                         4, screen->field_x, 6, "Cancel", cancel_click, screen);
 478 }
 479
 480
 481 static void config_screen_setup_widgets(struct config_screen *screen,
 482                 const struct config *config,
 483                 const struct system_info *sysinfo)
 484 {
 485         struct nc_widgetset *set = screen->widgetset;
 486         struct interface_config *ifcfg;
 487         char *str, *ip, *mask, *gw;
 488         enum net_conf_type type;
 489         unsigned int i;
 490
 491         build_assert(sizeof(screen->widgets) / sizeof(struct widget *)
 492                         == N_FIELDS);
 493
 494         type = screen->net_conf_type;
 495         ifcfg = first_active_interface(config);
 496
 497         screen->widgets.autoboot_l = widget_new_label(set, 0, 0, "Autoboot:");
 498         screen->widgets.autoboot_f = widget_new_checkbox(set, 0, 0,
 499                                         config->autoboot_enabled);
 500
 501         str = talloc_asprintf(screen, "%d", config->autoboot_timeout_sec);
 502         screen->widgets.timeout_l = widget_new_label(set, 0, 0, "Timeout:");
 503         screen->widgets.timeout_f = widget_new_textbox(set, 0, 0, 5, str);
 504         screen->widgets.timeout_help_l = widget_new_label(set, 0, 0, "seconds");
 505
 506         widget_textbox_set_validator_integer(screen->widgets.timeout_f, 0, 999);
 507
 508         screen->widgets.network_l = widget_new_label(set, 0, 0, "Network");
 509         screen->widgets.network_f = widget_new_select(set, 0, 0, 50);
 510
 511         widget_select_add_option(screen->widgets.network_f,
 512                                         NET_CONF_TYPE_DHCP_ALL,
 513                                         "DHCP on all active interfaces",
 514                                         type == NET_CONF_TYPE_DHCP_ALL);
 515         widget_select_add_option(screen->widgets.network_f,
 516                                         NET_CONF_TYPE_DHCP_ONE,
 517                                         "DHCP on a specific interface",
 518                                         type == NET_CONF_TYPE_DHCP_ONE);
 519         widget_select_add_option(screen->widgets.network_f,
 520                                         NET_CONF_TYPE_STATIC,
 521                                         "Static IP configuration",
 522                                         type == NET_CONF_TYPE_STATIC);
 523
 524         widget_select_on_change(screen->widgets.network_f,
 525                         config_screen_network_change, screen);
 526
 527         screen->widgets.iface_l = widget_new_label(set, 0, 0, "Device:");
 528         screen->widgets.iface_f = widget_new_select(set, 0, 0, 50);
 529
 530         for (i = 0; i < sysinfo->n_interfaces; i++) {
 531                 struct interface_info *info = sysinfo->interfaces[i];
 532                 char str[50], mac[20];
 533                 bool is_default;
 534
 535                 is_default = ifcfg && !memcmp(ifcfg->hwaddr, info->hwaddr,
 536                                         sizeof(ifcfg->hwaddr));
 537
 538                 mac_str(info->hwaddr, info->hwaddr_size, mac, sizeof(mac));
 539                 snprintf(str, sizeof(str), "%s [%s, %s]", info->name, mac,
 540                                 info->link ? "link up" : "link down");
 541
 542                 widget_select_add_option(screen->widgets.iface_f,
 543                                                 i, str, is_default);
 544         }
 545
 546         gw = ip = mask = NULL;
 547         if (ifcfg && ifcfg->method == CONFIG_METHOD_STATIC) {
 548                 char *sep;
 549
 550                 str = talloc_strdup(screen, ifcfg->static_config.address);
 551                 sep = strchr(str, '/');
 552                 ip = str;
 553
 554                 if (sep) {
 555                         *sep = '\0';
 556                         mask = sep + 1;
 557                 }
 558                 gw = ifcfg->static_config.gateway;
 559         }
 560
 561         screen->widgets.ip_addr_l = widget_new_label(set, 0, 0, "IP/mask:");
 562         screen->widgets.ip_addr_f = widget_new_textbox(set, 0, 0, 16, ip);
 563         screen->widgets.ip_mask_l = widget_new_label(set, 0, 0, "/");
 564         screen->widgets.ip_mask_f = widget_new_textbox(set, 0, 0, 4, mask);
 565         screen->widgets.ip_addr_mask_help_l =
 566                 widget_new_label(set, 0, 0, "(eg. 192.168.0.10 / 24)");
 567
 568         widget_textbox_set_validator_ipv4(screen->widgets.ip_addr_f);
 569         widget_textbox_set_validator_integer(screen->widgets.ip_mask_f, 1, 31);
 570
 571         screen->widgets.gateway_l = widget_new_label(set, 0, 0, "Gateway:");
 572         screen->widgets.gateway_f = widget_new_textbox(set, 0, 0, 16, gw);
 573         screen->widgets.gateway_help_l =
 574                 widget_new_label(set, 0, 0, "(eg. 192.168.0.1)");
 575
 576         widget_textbox_set_validator_ipv4(screen->widgets.gateway_f);
 577
 578         str = talloc_strdup(screen, "");
 579         for (i = 0; i < config->network.n_dns_servers; i++) {
 580                 str = talloc_asprintf_append(str, "%s%s",
 581                                 (i == 0) ? "" : " ",
 582                                 config->network.dns_servers[i]);
 583         }
 584
 585         screen->widgets.dns_l = widget_new_label(set, 0, 0, "DNS Server(s):");
 586         screen->widgets.dns_f = widget_new_textbox(set, 0, 0, 32, str);
 587         screen->widgets.dns_help_l =
 588                 widget_new_label(set, 0, 0, "(eg. 192.168.0.2)");
 589
 590         widget_textbox_set_validator_ipv4_multi(screen->widgets.dns_f);
 591
 592         screen->widgets.dns_dhcp_help_l = widget_new_label(set, 0, 0,
 593                         "(if not provided by DHCP server)");
 594
 595         screen->widgets.ok_b = widget_new_button(set, 0, 0, 6, "OK",
 596                         ok_click, screen);
 597         screen->widgets.help_b = widget_new_button(set, 0, 0, 6, "Help",
 598                         help_click, screen);
 599         screen->widgets.cancel_b = widget_new_button(set, 0, 0, 6, "Cancel",
 600                         cancel_click, screen);
 601 }
 602
 603 static void config_screen_widget_focus(struct nc_widget *widget, void *arg)
 604 {
 605         struct config_screen *screen = arg;
 606         int w_y, s_max;
 607
 608         w_y = widget_y(widget) + widget_focus_y(widget);
 609         s_max = getmaxy(screen->scr.sub_ncw) - 1;
 610
 611         if (w_y < screen->scroll_y)
 612                 screen->scroll_y = w_y;
 613
 614         else if (w_y + screen->scroll_y + 1 > s_max)
 615                 screen->scroll_y = 1 + w_y - s_max;
 616
 617         else
 618                 return;
 619
 620         pad_refresh(screen);
 621 }
 622
 623 static void config_screen_draw(struct config_screen *screen,
 624                 const struct config *config,
 625                 const struct system_info *sysinfo)
 626 {
 627         bool repost = false;
 628         int height;
 629
 630         /* The size of the pad we'll need depends on the number of interfaces.
 631          *
 632          * We use N_FIELDS (which is quite conservative, as some fields share
 633          * a line) as a base, then add 3 (as the network select field is
 634          * takes 3 lines), and n_interfaces (as the network interface field
 635          * has n_interfaces lines).
 636          */
 637         height = N_FIELDS + 3;
 638         if (sysinfo)
 639                 height += sysinfo->n_interfaces;
 640         if (!screen->pad || getmaxy(screen->pad) < height) {
 641                 if (screen->pad)
 642                         delwin(screen->pad);
 643                 screen->pad = newpad(height, COLS);
 644         }
 645
 646         if (screen->widgetset) {
 647                 widgetset_unpost(screen->widgetset);
 648                 talloc_free(screen->widgetset);
 649                 repost = true;
 650         }
 651
 652         screen->widgetset = widgetset_create(screen, screen->scr.main_ncw,
 653                         screen->pad);
 654         widgetset_set_widget_focus(screen->widgetset,
 655                         config_screen_widget_focus, screen);
 656
 657         if (!config || !sysinfo) {
 658                 config_screen_setup_empty(screen);
 659         } else {
 660                 screen->net_conf_type = find_net_conf_type(config);
 661
 662                 config_screen_setup_widgets(screen, config, sysinfo);
 663                 config_screen_layout_widgets(screen, screen->net_conf_type);
 664         }
 665
 666         if (repost)
 667                 widgetset_post(screen->widgetset);
 668 }
 669
 670 void config_screen_update(struct config_screen *screen,
 671                 const struct config *config,
 672                 const struct system_info *sysinfo)
 673 {
 674         config_screen_draw(screen, config, sysinfo);
 675         pad_refresh(screen);
 676 }
 677
 678 static int config_screen_destroy(void *arg)
 679 {
 680         struct config_screen *screen = arg;
 681         if (screen->pad)
 682                 delwin(screen->pad);
 683         return 0;
 684 }
 685
 686 struct config_screen *config_screen_init(struct cui *cui,
 687                 const struct config *config,
 688                 const struct system_info *sysinfo,
 689                 void (*on_exit)(struct cui *))
 690 {
 691         struct config_screen *screen;
 692
 693         screen = talloc_zero(cui, struct config_screen);
 694         talloc_set_destructor(screen, config_screen_destroy);
 695         nc_scr_init(&screen->scr, pb_config_screen_sig, 0,
 696                         cui, config_screen_process_key,
 697                         config_screen_post, config_screen_unpost,
 698                         config_screen_resize);
 699
 700         screen->cui = cui;
 701         screen->on_exit = on_exit;
 702         screen->label_x = 2;
 703         screen->field_x = 17;
 704
 705         screen->scr.frame.ltitle = talloc_strdup(screen,
 706                         "Petitboot System Configuration");
 707         screen->scr.frame.rtitle = NULL;
 708         screen->scr.frame.help = talloc_strdup(screen,
 709                         "tab=next, shift+tab=previous, x=exit, h=help");
 710         nc_scr_frame_draw(&screen->scr);
 711
 712         scrollok(screen->scr.sub_ncw, true);
 713
 714         config_screen_draw(screen, config, sysinfo);
 715
 716         return screen;
 717 }