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         if (str && strlen(str)) {
 253                 char *dns, *tmp;
 254                 int i;
 255
 256                 for (;;) {
 257                         dns = strtok_r(str, " \t", &tmp);
 258
 259                         if (!dns)
 260                                 break;
 261
 262                         i = config->network.n_dns_servers++;
 263                         config->network.dns_servers = talloc_realloc(config,
 264                                         config->network.dns_servers,
 265                                         const char *,
 266                                         config->network.n_dns_servers);
 267                         config->network.dns_servers[i] =
 268                                 talloc_strdup(config, dns);
 269
 270                         str = NULL;
 271                 }
 272         }
 273
 274         rc = cui_send_config(screen->cui, config);
 275         talloc_free(config);
 276
 277         if (rc)
 278                 pb_log("cui_send_config failed!\n");
 279         else
 280                 pb_debug("config sent!\n");
 281
 282         return 0;
 283 }
 284
 285 static void ok_click(void *arg)
 286 {
 287         struct config_screen *screen = arg;
 288         if (screen_process_form(screen))
 289                 /* errors are written to the status line, so we'll need
 290                  * to refresh */
 291                 wrefresh(screen->scr.main_ncw);
 292         else
 293                 screen->exit = true;
 294 }
 295
 296 static void help_click(void *arg)
 297 {
 298         struct config_screen *screen = arg;
 299         screen->show_help = true;
 300 }
 301
 302 static void cancel_click(void *arg)
 303 {
 304         struct config_screen *screen = arg;
 305         screen->exit = true;
 306 }
 307
 308 static int layout_pair(struct config_screen *screen, int y,
 309                 struct nc_widget_label *label,
 310                 struct nc_widget *field)
 311 {
 312         struct nc_widget *label_w = widget_label_base(label);
 313         widget_move(label_w, y, screen->label_x);
 314         widget_move(field, y, screen->field_x);
 315         return max(widget_height(label_w), widget_height(field));
 316 }
 317
 318 static void config_screen_layout_widgets(struct config_screen *screen,
 319                 enum net_conf_type net_conf)
 320 {
 321         struct nc_widget *wl, *wf, *wh;
 322         int y, x, help_x;
 323         bool show;
 324
 325         y = 1;
 326         help_x = screen->field_x + 2 +
 327                 widget_width(widget_textbox_base(screen->widgets.dns_f));
 328
 329         y += layout_pair(screen, y, screen->widgets.autoboot_l,
 330                         widget_checkbox_base(screen->widgets.autoboot_f));
 331
 332         wf = widget_textbox_base(screen->widgets.timeout_f);
 333         widget_move(widget_label_base(screen->widgets.timeout_l),
 334                         y, screen->label_x);
 335         widget_move(wf, y, screen->field_x);
 336         widget_move(widget_label_base(screen->widgets.timeout_help_l),
 337                         y, screen->field_x + widget_width(wf) + 1);
 338
 339         y += 2;
 340
 341         y += layout_pair(screen, y, screen->widgets.network_l,
 342                         widget_select_base(screen->widgets.network_f));
 343
 344         y += 1;
 345
 346         /* conditionally show iface select */
 347         wl = widget_label_base(screen->widgets.iface_l);
 348         wf = widget_select_base(screen->widgets.iface_f);
 349
 350         show = net_conf == NET_CONF_TYPE_DHCP_ONE ||
 351                 net_conf == NET_CONF_TYPE_STATIC;
 352
 353         widget_set_visible(wl, show);
 354         widget_set_visible(wf, show);
 355
 356         if (show)
 357                 y += layout_pair(screen, y, screen->widgets.iface_l, wf) + 1;
 358
 359         /* conditionally show static IP params */
 360         show = net_conf == NET_CONF_TYPE_STATIC;
 361
 362         wl = widget_label_base(screen->widgets.ip_addr_l);
 363         wf = widget_textbox_base(screen->widgets.ip_addr_f);
 364         widget_set_visible(wl, show);
 365         widget_set_visible(wf, show);
 366         x = screen->field_x + widget_width(wf) + 1;
 367
 368         if (show)
 369                 layout_pair(screen, y, screen->widgets.ip_addr_l, wf);
 370
 371         wl = widget_label_base(screen->widgets.ip_mask_l);
 372         wf = widget_textbox_base(screen->widgets.ip_mask_f);
 373         widget_set_visible(wl, show);
 374         widget_set_visible(wf, show);
 375
 376         if (show) {
 377                 widget_move(wl, y, x);
 378                 widget_move(wf, y, x + 2);
 379         }
 380
 381         /* help for IP/mask */
 382         wh = widget_label_base(screen->widgets.ip_addr_mask_help_l);
 383         widget_set_visible(wh, show);
 384         if (show) {
 385                 widget_move(wh, y, help_x);
 386                 y++;
 387         }
 388
 389         wl = widget_label_base(screen->widgets.gateway_l);
 390         wf = widget_textbox_base(screen->widgets.gateway_f);
 391         wh = widget_label_base(screen->widgets.gateway_help_l);
 392         widget_set_visible(wl, show);
 393         widget_set_visible(wf, show);
 394         widget_set_visible(wh, show);
 395
 396         if (show) {
 397                 layout_pair(screen, y, screen->widgets.gateway_l, wf);
 398                 widget_move(wh, y, help_x);
 399                 y++;
 400         }
 401
 402         wh = widget_label_base(screen->widgets.dns_help_l);
 403         layout_pair(screen, y, screen->widgets.dns_l,
 404                         widget_textbox_base(screen->widgets.dns_f));
 405         widget_move(wh, y, help_x);
 406         y++;
 407
 408         /* we show the DNS/DHCP help if we're configuring DHCP */
 409         show = net_conf != NET_CONF_TYPE_STATIC;
 410         wl = widget_label_base(screen->widgets.dns_dhcp_help_l);
 411         widget_set_visible(wl, show);
 412         if (show) {
 413                 widget_move(wl, y, screen->field_x);
 414                 y += 1;
 415         }
 416
 417         y += 1;
 418
 419         widget_move(widget_button_base(screen->widgets.ok_b),
 420                         y, screen->field_x);
 421         widget_move(widget_button_base(screen->widgets.help_b),
 422                         y, screen->field_x + 10);
 423         widget_move(widget_button_base(screen->widgets.cancel_b),
 424                         y, screen->field_x + 20);
 425 }
 426
 427 static void config_screen_network_change(void *arg, int value)
 428 {
 429         struct config_screen *screen = arg;
 430         screen->net_conf_type = value;
 431         widgetset_unpost(screen->widgetset);
 432         config_screen_layout_widgets(screen, value);
 433         widgetset_post(screen->widgetset);
 434 }
 435
 436 static struct interface_config *first_active_interface(
 437                 const struct config *config)
 438 {
 439         unsigned int i;
 440
 441         for (i = 0; i < config->network.n_interfaces; i++) {
 442                 if (config->network.interfaces[i]->ignore)
 443                         continue;
 444                 return config->network.interfaces[i];
 445         }
 446         return NULL;
 447 }
 448
 449 static enum net_conf_type find_net_conf_type(const struct config *config)
 450 {
 451         struct interface_config *ifcfg;
 452
 453         ifcfg = first_active_interface(config);
 454
 455         if (!ifcfg)
 456                 return NET_CONF_TYPE_DHCP_ALL;
 457
 458         else if (ifcfg->method == CONFIG_METHOD_DHCP)
 459                 return NET_CONF_TYPE_DHCP_ONE;
 460
 461         else if (ifcfg->method == CONFIG_METHOD_STATIC)
 462                 return NET_CONF_TYPE_STATIC;
 463
 464         assert(0);
 465         return NET_CONF_TYPE_DHCP_ALL;
 466 }
 467
 468 static void config_screen_setup_empty(struct config_screen *screen)
 469 {
 470         widget_new_label(screen->widgetset, 2, screen->field_x,
 471                         "Waiting for configuration data...");
 472         screen->widgets.cancel_b = widget_new_button(screen->widgetset,
 473                         4, screen->field_x, 6, "Cancel", cancel_click, screen);
 474 }
 475
 476
 477 static void config_screen_setup_widgets(struct config_screen *screen,
 478                 const struct config *config,
 479                 const struct system_info *sysinfo)
 480 {
 481         struct nc_widgetset *set = screen->widgetset;
 482         struct interface_config *ifcfg;
 483         char *str, *ip, *mask, *gw;
 484         enum net_conf_type type;
 485         unsigned int i;
 486
 487         build_assert(sizeof(screen->widgets) / sizeof(struct widget *)
 488                         == N_FIELDS);
 489
 490         type = screen->net_conf_type;
 491         ifcfg = first_active_interface(config);
 492
 493         screen->widgets.autoboot_l = widget_new_label(set, 0, 0, "Autoboot:");
 494         screen->widgets.autoboot_f = widget_new_checkbox(set, 0, 0,
 495                                         config->autoboot_enabled);
 496
 497         str = talloc_asprintf(screen, "%d", config->autoboot_timeout_sec);
 498         screen->widgets.timeout_l = widget_new_label(set, 0, 0, "Timeout:");
 499         screen->widgets.timeout_f = widget_new_textbox(set, 0, 0, 5, str);
 500         screen->widgets.timeout_help_l = widget_new_label(set, 0, 0, "seconds");
 501
 502         widget_textbox_set_validator_integer(screen->widgets.timeout_f, 0, 999);
 503
 504         screen->widgets.network_l = widget_new_label(set, 0, 0, "Network");
 505         screen->widgets.network_f = widget_new_select(set, 0, 0, 50);
 506
 507         widget_select_add_option(screen->widgets.network_f,
 508                                         NET_CONF_TYPE_DHCP_ALL,
 509                                         "DHCP on all active interfaces",
 510                                         type == NET_CONF_TYPE_DHCP_ALL);
 511         widget_select_add_option(screen->widgets.network_f,
 512                                         NET_CONF_TYPE_DHCP_ONE,
 513                                         "DHCP on a specific interface",
 514                                         type == NET_CONF_TYPE_DHCP_ONE);
 515         widget_select_add_option(screen->widgets.network_f,
 516                                         NET_CONF_TYPE_STATIC,
 517                                         "Static IP configuration",
 518                                         type == NET_CONF_TYPE_STATIC);
 519
 520         widget_select_on_change(screen->widgets.network_f,
 521                         config_screen_network_change, screen);
 522
 523         screen->widgets.iface_l = widget_new_label(set, 0, 0, "Device:");
 524         screen->widgets.iface_f = widget_new_select(set, 0, 0, 50);
 525
 526         for (i = 0; i < sysinfo->n_interfaces; i++) {
 527                 struct interface_info *info = sysinfo->interfaces[i];
 528                 char str[50], mac[20];
 529                 bool is_default;
 530
 531                 is_default = ifcfg && !memcmp(ifcfg->hwaddr, info->hwaddr,
 532                                         sizeof(ifcfg->hwaddr));
 533
 534                 mac_str(info->hwaddr, info->hwaddr_size, mac, sizeof(mac));
 535                 snprintf(str, sizeof(str), "%s [%s, %s]", info->name, mac,
 536                                 info->link ? "link up" : "link down");
 537
 538                 widget_select_add_option(screen->widgets.iface_f,
 539                                                 i, str, is_default);
 540         }
 541
 542         gw = ip = mask = NULL;
 543         if (ifcfg && ifcfg->method == CONFIG_METHOD_STATIC) {
 544                 char *sep;
 545
 546                 str = talloc_strdup(screen, ifcfg->static_config.address);
 547                 sep = strchr(str, '/');
 548                 ip = str;
 549
 550                 if (sep) {
 551                         *sep = '\0';
 552                         mask = sep + 1;
 553                 }
 554                 gw = ifcfg->static_config.gateway;
 555         }
 556
 557         screen->widgets.ip_addr_l = widget_new_label(set, 0, 0, "IP/mask:");
 558         screen->widgets.ip_addr_f = widget_new_textbox(set, 0, 0, 16, ip);
 559         screen->widgets.ip_mask_l = widget_new_label(set, 0, 0, "/");
 560         screen->widgets.ip_mask_f = widget_new_textbox(set, 0, 0, 4, mask);
 561         screen->widgets.ip_addr_mask_help_l =
 562                 widget_new_label(set, 0, 0, "(eg. 192.168.0.10 / 24)");
 563
 564         widget_textbox_set_validator_ipv4(screen->widgets.ip_addr_f);
 565         widget_textbox_set_validator_integer(screen->widgets.ip_mask_f, 1, 31);
 566
 567         screen->widgets.gateway_l = widget_new_label(set, 0, 0, "Gateway:");
 568         screen->widgets.gateway_f = widget_new_textbox(set, 0, 0, 16, gw);
 569         screen->widgets.gateway_help_l =
 570                 widget_new_label(set, 0, 0, "(eg. 192.168.0.1)");
 571
 572         widget_textbox_set_validator_ipv4(screen->widgets.gateway_f);
 573
 574         str = talloc_strdup(screen, "");
 575         for (i = 0; i < config->network.n_dns_servers; i++) {
 576                 str = talloc_asprintf_append(str, "%s%s",
 577                                 (i == 0) ? "" : " ",
 578                                 config->network.dns_servers[i]);
 579         }
 580
 581         screen->widgets.dns_l = widget_new_label(set, 0, 0, "DNS Server(s):");
 582         screen->widgets.dns_f = widget_new_textbox(set, 0, 0, 32, str);
 583         screen->widgets.dns_help_l =
 584                 widget_new_label(set, 0, 0, "(eg. 192.168.0.2)");
 585
 586         widget_textbox_set_validator_ipv4_multi(screen->widgets.dns_f);
 587
 588         screen->widgets.dns_dhcp_help_l = widget_new_label(set, 0, 0,
 589                         "(if not provided by DHCP server)");
 590
 591         screen->widgets.ok_b = widget_new_button(set, 0, 0, 6, "OK",
 592                         ok_click, screen);
 593         screen->widgets.help_b = widget_new_button(set, 0, 0, 6, "Help",
 594                         help_click, screen);
 595         screen->widgets.cancel_b = widget_new_button(set, 0, 0, 6, "Cancel",
 596                         cancel_click, screen);
 597 }
 598
 599 static void config_screen_widget_focus(struct nc_widget *widget, void *arg)
 600 {
 601         struct config_screen *screen = arg;
 602         int w_y, s_max;
 603
 604         w_y = widget_y(widget) + widget_focus_y(widget);
 605         s_max = getmaxy(screen->scr.sub_ncw) - 1;
 606
 607         if (w_y < screen->scroll_y)
 608                 screen->scroll_y = w_y;
 609
 610         else if (w_y + screen->scroll_y + 1 > s_max)
 611                 screen->scroll_y = 1 + w_y - s_max;
 612
 613         else
 614                 return;
 615
 616         pad_refresh(screen);
 617 }
 618
 619 static void config_screen_draw(struct config_screen *screen,
 620                 const struct config *config,
 621                 const struct system_info *sysinfo)
 622 {
 623         bool repost = false;
 624         int height;
 625
 626         /* The size of the pad we'll need depends on the number of interfaces.
 627          *
 628          * We use N_FIELDS (which is quite conservative, as some fields share
 629          * a line) as a base, then add 3 (as the network select field is
 630          * takes 3 lines), and n_interfaces (as the network interface field
 631          * has n_interfaces lines).
 632          */
 633         height = N_FIELDS + 3;
 634         if (sysinfo)
 635                 height += sysinfo->n_interfaces;
 636         if (!screen->pad || getmaxy(screen->pad) < height) {
 637                 if (screen->pad)
 638                         delwin(screen->pad);
 639                 screen->pad = newpad(height, COLS);
 640         }
 641
 642         if (screen->widgetset) {
 643                 widgetset_unpost(screen->widgetset);
 644                 talloc_free(screen->widgetset);
 645                 repost = true;
 646         }
 647
 648         screen->widgetset = widgetset_create(screen, screen->scr.main_ncw,
 649                         screen->pad);
 650         widgetset_set_widget_focus(screen->widgetset,
 651                         config_screen_widget_focus, screen);
 652
 653         if (!config || !sysinfo) {
 654                 config_screen_setup_empty(screen);
 655         } else {
 656                 screen->net_conf_type = find_net_conf_type(config);
 657
 658                 config_screen_setup_widgets(screen, config, sysinfo);
 659                 config_screen_layout_widgets(screen, screen->net_conf_type);
 660         }
 661
 662         if (repost)
 663                 widgetset_post(screen->widgetset);
 664 }
 665
 666 void config_screen_update(struct config_screen *screen,
 667                 const struct config *config,
 668                 const struct system_info *sysinfo)
 669 {
 670         config_screen_draw(screen, config, sysinfo);
 671         pad_refresh(screen);
 672 }
 673
 674 static int config_screen_destroy(void *arg)
 675 {
 676         struct config_screen *screen = arg;
 677         if (screen->pad)
 678                 delwin(screen->pad);
 679         return 0;
 680 }
 681
 682 struct config_screen *config_screen_init(struct cui *cui,
 683                 const struct config *config,
 684                 const struct system_info *sysinfo,
 685                 void (*on_exit)(struct cui *))
 686 {
 687         struct config_screen *screen;
 688
 689         screen = talloc_zero(cui, struct config_screen);
 690         talloc_set_destructor(screen, config_screen_destroy);
 691         nc_scr_init(&screen->scr, pb_config_screen_sig, 0,
 692                         cui, config_screen_process_key,
 693                         config_screen_post, config_screen_unpost,
 694                         config_screen_resize);
 695
 696         screen->cui = cui;
 697         screen->on_exit = on_exit;
 698         screen->label_x = 2;
 699         screen->field_x = 17;
 700
 701         screen->scr.frame.ltitle = talloc_strdup(screen,
 702                         "Petitboot System Configuration");
 703         screen->scr.frame.rtitle = NULL;
 704         screen->scr.frame.help = talloc_strdup(screen,
 705                         "tab=next, shift+tab=previous, x=exit, h=help");
 706         nc_scr_frame_draw(&screen->scr);
 707
 708         scrollok(screen->scr.sub_ncw, true);
 709
 710         config_screen_draw(screen, config, sysinfo);
 711
 712         return screen;
 713 }