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

   1 /*
   2  *  Copyright (C) 2009 Sony Computer Entertainment Inc.
   3  *  Copyright 2009 Sony Corp.
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; version 2 of the License.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #if defined(HAVE_CONFIG_H)
  20 #include "config.h"
  21 #endif
  22
  23 #include <assert.h>
  24 #include <string.h>
  25
  26 #include "log/log.h"
  27 #include "talloc/talloc.h"
  28 #include "i18n/i18n.h"
  29 #include "nc-boot-editor.h"
  30 #include "nc-widgets.h"
  31
  32 struct boot_editor {
  33         struct nc_scr           scr;
  34         struct cui              *cui;
  35         void                    *data;
  36         struct pmenu_item       *item;
  37         enum {
  38                 STATE_EDIT,
  39                 STATE_CANCEL,
  40                 STATE_SAVE,
  41                 STATE_HELP,
  42         }                       state;
  43         void                    (*on_exit)(struct cui *cui,
  44                                         struct pmenu_item *item,
  45                                         struct pb_boot_data *bd);
  46         bool                    need_redraw;
  47         bool                    need_update;
  48
  49         int                     label_x;
  50         int                     field_x;
  51         int                     scroll_y;
  52
  53         WINDOW                  *pad;
  54         struct nc_widgetset     *widgetset;
  55         struct {
  56                 struct nc_widget_label          *device_l;
  57                 struct nc_widget_select         *device_f;
  58                 struct nc_widget_label          *image_l;
  59                 struct nc_widget_textbox        *image_f;
  60                 struct nc_widget_label          *initrd_l;
  61                 struct nc_widget_textbox        *initrd_f;
  62                 struct nc_widget_label          *dtb_l;
  63                 struct nc_widget_textbox        *dtb_f;
  64                 struct nc_widget_label          *args_l;
  65                 struct nc_widget_textbox        *args_f;
  66                 struct nc_widget_label          *args_sig_file_l;
  67                 struct nc_widget_textbox        *args_sig_file_f;
  68                 struct nc_widget_button         *ok_b;
  69                 struct nc_widget_button         *help_b;
  70                 struct nc_widget_button         *cancel_b;
  71         } widgets;
  72
  73         const char              *selected_device;
  74         char                    *image;
  75         char                    *initrd;
  76         char                    *dtb;
  77         char                    *args;
  78         char                    *args_sig_file;
  79
  80         bool                    use_signature_files;
  81 };
  82
  83 extern const struct help_text boot_editor_help_text;
  84
  85 static struct boot_editor *boot_editor_from_scr(struct nc_scr *scr)
  86 {
  87         struct boot_editor *boot_editor;
  88
  89         assert(scr->sig == pb_boot_editor_sig);
  90         boot_editor = (struct boot_editor *)
  91                 ((char *)scr - (size_t)&((struct boot_editor *)0)->scr);
  92         assert(boot_editor->scr.sig == pb_boot_editor_sig);
  93         return boot_editor;
  94 }
  95
  96 static void pad_refresh(struct boot_editor *boot_editor)
  97 {
  98         int y, x, rows, cols;
  99
 100         getmaxyx(boot_editor->scr.sub_ncw, rows, cols);
 101         getbegyx(boot_editor->scr.sub_ncw, y, x);
 102
 103         prefresh(boot_editor->pad, boot_editor->scroll_y, 0,
 104                         y, x, rows, cols);
 105 }
 106
 107 static struct boot_editor *boot_editor_from_arg(void *arg)
 108 {
 109         struct boot_editor *boot_editor = arg;
 110
 111         assert(boot_editor->scr.sig == pb_boot_editor_sig);
 112         return boot_editor;
 113 }
 114
 115 static int boot_editor_post(struct nc_scr *scr)
 116 {
 117         struct boot_editor *boot_editor = boot_editor_from_scr(scr);
 118
 119         if (boot_editor->need_update) {
 120                 boot_editor_update(boot_editor, boot_editor->cui->sysinfo);
 121                 boot_editor->need_update = false;
 122         } else {
 123                 widgetset_post(boot_editor->widgetset);
 124         }
 125
 126         nc_scr_frame_draw(scr);
 127         if (boot_editor->need_redraw) {
 128                 redrawwin(scr->main_ncw);
 129                 boot_editor->need_redraw = false;
 130         }
 131         wrefresh(boot_editor->scr.main_ncw);
 132         pad_refresh(boot_editor);
 133         return 0;
 134 }
 135
 136 static int boot_editor_unpost(struct nc_scr *scr)
 137 {
 138         widgetset_unpost(boot_editor_from_scr(scr)->widgetset);
 139         return 0;
 140 }
 141
 142 struct nc_scr *boot_editor_scr(struct boot_editor *boot_editor)
 143 {
 144         return &boot_editor->scr;
 145 }
 146
 147 static void boot_editor_resize(struct nc_scr *scr)
 148 {
 149         /* FIXME: forms can't be resized, need to recreate here */
 150         boot_editor_unpost(scr);
 151         boot_editor_post(scr);
 152 }
 153
 154 static char *conditional_prefix(struct pb_boot_data *ctx,
 155                 const char *prefix, const char *value)
 156 {
 157         const char *sep;
 158
 159         if (!value || !*value)
 160                 return NULL;
 161
 162         sep = "";
 163         if (!prefix)
 164                 prefix = "";
 165         else if ((prefix[strlen(prefix) - 1] != '/') &&
 166                                 (value[0] != '/'))
 167                 sep = "/";
 168
 169         return talloc_asprintf(ctx, "%s%s%s", prefix, sep, value);
 170 }
 171
 172 static struct pb_boot_data *boot_editor_prepare_data(
 173                 struct boot_editor *boot_editor)
 174 {
 175         struct pb_boot_data *bd;
 176         char *s, *prefix;
 177         int idx;
 178
 179         bd = talloc(boot_editor, struct pb_boot_data);
 180
 181         if (!bd)
 182                 return NULL;
 183
 184         idx = widget_select_get_value(boot_editor->widgets.device_f);
 185         if (idx == -1 || (unsigned int)idx >
 186                         boot_editor->cui->sysinfo->n_blockdevs)
 187                 prefix = NULL;
 188         else
 189                 prefix = boot_editor->cui->sysinfo->blockdevs[idx]->mountpoint;
 190
 191         s = widget_textbox_get_value(boot_editor->widgets.image_f);
 192         bd->image = conditional_prefix(bd, prefix, s);
 193         if (!bd->image) {
 194                 talloc_free(bd);
 195                 return NULL;
 196         }
 197
 198         s = widget_textbox_get_value(boot_editor->widgets.initrd_f);
 199         bd->initrd = conditional_prefix(bd, prefix, s);
 200
 201         s = widget_textbox_get_value(boot_editor->widgets.dtb_f);
 202         bd->dtb = conditional_prefix(bd, prefix, s);
 203
 204         s = widget_textbox_get_value(boot_editor->widgets.args_f);
 205         bd->args = *s ? talloc_strdup(bd, s) : NULL;
 206
 207         if (boot_editor->use_signature_files) {
 208                 s = widget_textbox_get_value(
 209                         boot_editor->widgets.args_sig_file_f);
 210                 bd->args_sig_file = conditional_prefix(bd, prefix, s);
 211         }
 212         else {
 213                 bd->args_sig_file = NULL;
 214         }
 215
 216         return bd;
 217 }
 218
 219 /**
 220  * boot_editor_process_key - Process a user keystroke.
 221  *
 222  * Called from the cui via the scr:process_key method.
 223  */
 224
 225 static void boot_editor_process_key(struct nc_scr *scr, int key)
 226 {
 227         struct boot_editor *boot_editor = boot_editor_from_scr(scr);
 228         struct pmenu_item *item;
 229         struct pb_boot_data *bd;
 230         bool handled;
 231
 232         handled = widgetset_process_key(boot_editor->widgetset, key);
 233         if (handled)
 234                 pad_refresh(boot_editor);
 235
 236         else if (key == 'x' || key == 27)
 237                 boot_editor->state = STATE_CANCEL;
 238
 239         else if (key == 'h')
 240                 boot_editor->state = STATE_HELP;
 241
 242         item = NULL;
 243         bd = NULL;
 244
 245         switch (boot_editor->state) {
 246         case STATE_SAVE:
 247                 item = boot_editor->item;
 248                 bd = boot_editor_prepare_data(boot_editor);
 249                 if (!bd) {
 250                         /* Incomplete entry */
 251                         boot_editor->state = STATE_EDIT;
 252                         break;
 253                 }
 254                 /* fall through */
 255         case STATE_CANCEL:
 256                 boot_editor->on_exit(boot_editor->cui, item, bd);
 257                 break;
 258         case STATE_HELP:
 259                 boot_editor->state = STATE_EDIT;
 260                 boot_editor->need_redraw = true;
 261                 cui_show_help(boot_editor->cui, _("Boot Option Editor"),
 262                                 &boot_editor_help_text);
 263                 break;
 264         default:
 265                 break;
 266         }
 267 }
 268
 269 /**
 270  * boot_editor_destructor - The talloc destructor for a boot_editor.
 271  */
 272
 273 static int boot_editor_destructor(void *arg)
 274 {
 275         struct boot_editor *boot_editor = boot_editor_from_arg(arg);
 276         boot_editor->scr.sig = pb_removed_sig;
 277         if (boot_editor->pad)
 278                 delwin(boot_editor->pad);
 279         return 0;
 280 }
 281
 282 static void ok_click(void *arg)
 283 {
 284         struct boot_editor *boot_editor = arg;
 285         boot_editor->state = STATE_SAVE;
 286 }
 287
 288 static void help_click(void *arg)
 289 {
 290         struct boot_editor *boot_editor = arg;
 291         boot_editor->state = STATE_HELP;
 292 }
 293
 294 static void cancel_click(void *arg)
 295 {
 296         struct boot_editor *boot_editor = arg;
 297         boot_editor->state = STATE_CANCEL;
 298 }
 299
 300 static int layout_pair(struct boot_editor *boot_editor, int y,
 301                 struct nc_widget_label *label,
 302                 struct nc_widget_textbox *field)
 303 {
 304         struct nc_widget *label_w = widget_label_base(label);
 305         struct nc_widget *field_w = widget_textbox_base(field);
 306         widget_move(label_w, y, boot_editor->label_x);
 307         widget_move(field_w, y, boot_editor->field_x);
 308         return max(widget_height(label_w), widget_height(field_w));
 309 }
 310
 311 static int pad_height(int blockdevs_height)
 312 {
 313         return 10 + (2 * blockdevs_height);
 314 }
 315
 316 static void boot_editor_layout_widgets(struct boot_editor *boot_editor)
 317 {
 318         struct nc_widget *wf, *wl;
 319         int y = 1;
 320
 321         wl = widget_label_base(boot_editor->widgets.device_l);
 322         wf = widget_select_base(boot_editor->widgets.device_f);
 323         widget_move(wl, y, boot_editor->label_x);
 324         widget_move(wf, y, boot_editor->field_x);
 325
 326         y += widget_height(wf) + 1;
 327
 328
 329         y += layout_pair(boot_editor, y, boot_editor->widgets.image_l,
 330                                          boot_editor->widgets.image_f);
 331
 332         y += layout_pair(boot_editor, y, boot_editor->widgets.initrd_l,
 333                                          boot_editor->widgets.initrd_f);
 334
 335         y += layout_pair(boot_editor, y, boot_editor->widgets.dtb_l,
 336                                          boot_editor->widgets.dtb_f);
 337
 338         y += layout_pair(boot_editor, y, boot_editor->widgets.args_l,
 339                                          boot_editor->widgets.args_f);
 340
 341         if (boot_editor->use_signature_files) {
 342                 y += layout_pair(boot_editor, y,
 343                                         boot_editor->widgets.args_sig_file_l,
 344                                         boot_editor->widgets.args_sig_file_f);
 345         }
 346
 347
 348         y++;
 349         widget_move(widget_button_base(boot_editor->widgets.ok_b), y,
 350                     boot_editor->field_x);
 351         widget_move(widget_button_base(boot_editor->widgets.help_b), y,
 352                     boot_editor->field_x + 14);
 353         widget_move(widget_button_base(boot_editor->widgets.cancel_b), y,
 354                     boot_editor->field_x + 28);
 355 }
 356
 357 static void boot_editor_widget_focus(struct nc_widget *widget, void *arg)
 358 {
 359         struct boot_editor *boot_editor = arg;
 360         int w_y, s_max;
 361
 362         w_y = widget_y(widget) + widget_focus_y(widget);
 363         s_max = getmaxy(boot_editor->scr.sub_ncw) - 1;
 364
 365         if (w_y < boot_editor->scroll_y)
 366                 boot_editor->scroll_y = w_y;
 367
 368         else if (w_y + boot_editor->scroll_y + 1 > s_max)
 369                 boot_editor->scroll_y = 1 + w_y - s_max;
 370
 371         else
 372                 return;
 373
 374         pad_refresh(boot_editor);
 375 }
 376
 377 static void boot_editor_device_select_change(void *arg, int idx)
 378 {
 379         struct boot_editor *boot_editor = arg;
 380         if (idx == -1)
 381                 boot_editor->selected_device = NULL;
 382         else
 383                 boot_editor->selected_device =
 384                         boot_editor->cui->sysinfo->blockdevs[idx]->name;
 385 }
 386
 387 static void boot_editor_populate_device_select(struct boot_editor *boot_editor,
 388                 const struct system_info *sysinfo)
 389 {
 390         struct nc_widget_select *select = boot_editor->widgets.device_f;
 391         unsigned int i;
 392         bool selected;
 393
 394         widget_select_drop_options(select);
 395
 396         for (i = 0; sysinfo && i < sysinfo->n_blockdevs; i++) {
 397                 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
 398                 const char *name;
 399
 400                 name = talloc_asprintf(boot_editor, "%s [%s]",
 401                                 bd_info->name, bd_info->uuid);
 402                 selected = boot_editor->selected_device &&
 403                                 !strcmp(bd_info->name,
 404                                                 boot_editor->selected_device);
 405
 406                 widget_select_add_option(select, i, name, selected);
 407         }
 408
 409         /* If we're editing an existing option, the paths will be fully-
 410          * resolved. In this case, we want the manual device pre-selected.
 411          * However, we only do this if the widget hasn't been manually
 412          * changed. */
 413         selected = !boot_editor->selected_device;
 414
 415         widget_select_add_option(select, -1, _("Specify paths/URLs manually"),
 416                         selected);
 417 }
 418
 419 static bool path_on_device(struct blockdev_info *bd_info,
 420                 const char *path)
 421 {
 422         int len;
 423
 424         if (!bd_info->mountpoint)
 425                 return false;
 426
 427         len = strlen(bd_info->mountpoint);
 428         if (strncmp(bd_info->mountpoint, path, len))
 429                 return false;
 430
 431         /* if the mountpoint doesn't have a trailing slash, ensure that
 432          * the path starts with one (so we don't match a "/mnt/sda1/foo" path
 433          * on a "/mnt/sda" mountpoint) */
 434         return bd_info->mountpoint[len-1] == '/' || path[len] == '/';
 435 }
 436
 437
 438 static void boot_editor_find_device(struct boot_editor *boot_editor,
 439                 struct pb_boot_data *bd, const struct system_info *sysinfo)
 440 {
 441         struct blockdev_info *bd_info, *tmp;
 442         unsigned int i, len;
 443
 444         if (!sysinfo || !sysinfo->n_blockdevs)
 445                 return;
 446
 447         /* find the device for our boot image, by finding the longest
 448          * matching blockdev's mountpoint */
 449         for (len = 0, i = 0, bd_info = NULL; i < sysinfo->n_blockdevs; i++) {
 450                 tmp = sysinfo->blockdevs[i];
 451                 if (!path_on_device(tmp, bd->image))
 452                         continue;
 453                 if (strlen(tmp->mountpoint) <= len)
 454                         continue;
 455                 bd_info = tmp;
 456                 len = strlen(tmp->mountpoint);
 457         }
 458
 459         if (!bd_info)
 460                 return;
 461
 462         /* ensure that other paths are on this device */
 463         if (bd->initrd && !path_on_device(bd_info, bd->initrd))
 464                 return;
 465
 466         if (bd->dtb && !path_on_device(bd_info, bd->dtb))
 467                 return;
 468
 469         if (boot_editor->use_signature_files)
 470                 if (bd->args_sig_file && !path_on_device(bd_info,
 471                         bd->args_sig_file))
 472                         return;
 473
 474         /* ok, we match; preselect the device option, and remove the common
 475          * prefix */
 476         boot_editor->selected_device = bd_info->name;
 477         boot_editor->image += len;
 478
 479         if (boot_editor->initrd)
 480                 boot_editor->initrd += len;
 481         if (boot_editor->dtb)
 482                 boot_editor->dtb += len;
 483         if (boot_editor->use_signature_files)
 484                 if (boot_editor->args_sig_file)
 485                         boot_editor->args_sig_file += len;
 486 }
 487
 488 static void boot_editor_setup_widgets(struct boot_editor *boot_editor,
 489                 const struct system_info *sysinfo)
 490 {
 491         struct nc_widgetset *set = boot_editor->widgetset;
 492         int field_size;
 493
 494         field_size = COLS - 1 - boot_editor->field_x;
 495
 496         boot_editor->widgets.device_l = widget_new_label(set, 0, 0,
 497                         _("Device:"));
 498         boot_editor->widgets.device_f = widget_new_select(set, 0, 0,
 499                                                 field_size);
 500         widget_select_on_change(boot_editor->widgets.device_f,
 501                         boot_editor_device_select_change, boot_editor);
 502
 503         boot_editor_populate_device_select(boot_editor, sysinfo);
 504
 505         boot_editor->widgets.image_l = widget_new_label(set, 0, 0,
 506                         _("Kernel:"));
 507         boot_editor->widgets.image_f = widget_new_textbox(set, 0, 0,
 508                                                 field_size, boot_editor->image);
 509
 510         boot_editor->widgets.initrd_l = widget_new_label(set, 0, 0,
 511                         _("Initrd:"));
 512         boot_editor->widgets.initrd_f = widget_new_textbox(set, 0, 0,
 513                                                 field_size,
 514                                                 boot_editor->initrd);
 515
 516         boot_editor->widgets.dtb_l = widget_new_label(set, 0, 0,
 517                         _("Device tree:"));
 518         boot_editor->widgets.dtb_f = widget_new_textbox(set, 0, 0,
 519                                                 field_size, boot_editor->dtb);
 520
 521         boot_editor->widgets.args_l = widget_new_label(set, 0, 0,
 522                         _("Boot arguments:"));
 523         boot_editor->widgets.args_f = widget_new_textbox(set, 0, 0,
 524                                         field_size, boot_editor->args);
 525
 526         if (boot_editor->use_signature_files) {
 527                 boot_editor->widgets.args_sig_file_l = widget_new_label(set,
 528                                 0, 0, _("Argument signature file:"));
 529                 boot_editor->widgets.args_sig_file_f = widget_new_textbox(set,
 530                                 0, 0, field_size, boot_editor->args_sig_file);
 531         }
 532         else {
 533                 boot_editor->widgets.args_sig_file_l = NULL;
 534                 boot_editor->widgets.args_sig_file_f = NULL;
 535         }
 536
 537         boot_editor->widgets.ok_b = widget_new_button(set, 0, 0, 10,
 538                                         _("OK"), ok_click, boot_editor);
 539         boot_editor->widgets.help_b = widget_new_button(set, 0, 0, 10,
 540                                         _("Help"), help_click, boot_editor);
 541         boot_editor->widgets.cancel_b = widget_new_button(set, 0, 0, 10,
 542                                         _("Cancel"), cancel_click, boot_editor);
 543 }
 544
 545 static void boot_editor_draw(struct boot_editor *boot_editor,
 546                 const struct system_info *sysinfo)
 547 {
 548         bool repost = false;
 549         int height;
 550
 551         height = pad_height(sysinfo ? sysinfo->n_blockdevs : 0);
 552
 553         if (!boot_editor->pad || getmaxy(boot_editor->pad) < height) {
 554                 if (boot_editor->pad)
 555                         delwin(boot_editor->pad);
 556                 boot_editor->pad = newpad(height, COLS);
 557         }
 558
 559         if (boot_editor->widgetset) {
 560                 widgetset_unpost(boot_editor->widgetset);
 561                 talloc_free(boot_editor->widgetset);
 562                 repost = true;
 563         }
 564
 565         boot_editor->widgetset = widgetset_create(boot_editor,
 566                         boot_editor->scr.main_ncw,
 567                         boot_editor->pad);
 568         widgetset_set_widget_focus(boot_editor->widgetset,
 569                         boot_editor_widget_focus, boot_editor);
 570
 571         boot_editor_setup_widgets(boot_editor, sysinfo);
 572         boot_editor_layout_widgets(boot_editor);
 573
 574         if (repost)
 575                 widgetset_post(boot_editor->widgetset);
 576 }
 577
 578 void boot_editor_update(struct boot_editor *boot_editor,
 579                 const struct system_info *sysinfo)
 580 {
 581         const char *str;
 582
 583         if (boot_editor->cui->current != boot_editor_scr(boot_editor)) {
 584                 boot_editor->need_update = true;
 585                 return;
 586         }
 587
 588         str = widget_textbox_get_value(boot_editor->widgets.image_f);
 589         if (str) {
 590                 talloc_free(boot_editor->image);
 591                 boot_editor->image = talloc_strdup(boot_editor, str);
 592         }
 593
 594         str = widget_textbox_get_value(boot_editor->widgets.initrd_f);
 595         if (str) {
 596                 talloc_free(boot_editor->initrd);
 597                 boot_editor->initrd = talloc_strdup(boot_editor, str);
 598         }
 599
 600         str = widget_textbox_get_value(boot_editor->widgets.dtb_f);
 601         if (str) {
 602                 talloc_free(boot_editor->dtb);
 603                 boot_editor->dtb = talloc_strdup(boot_editor, str);
 604         }
 605
 606         str = widget_textbox_get_value(boot_editor->widgets.args_f);
 607         if (str) {
 608                 talloc_free(boot_editor->args);
 609                 boot_editor->args = talloc_strdup(boot_editor, str);
 610         }
 611
 612         if (boot_editor->use_signature_files) {
 613                 str = widget_textbox_get_value(boot_editor->widgets.args_sig_file_f);
 614                 if (str) {
 615                         talloc_free(boot_editor->args_sig_file);
 616                         boot_editor->args_sig_file = talloc_strdup(boot_editor, str);
 617                 }
 618         }
 619
 620         boot_editor_draw(boot_editor, sysinfo);
 621         pad_refresh(boot_editor);
 622 }
 623
 624 struct boot_editor *boot_editor_init(struct cui *cui,
 625                 struct pmenu_item *item,
 626                 const struct system_info *sysinfo,
 627                 void (*on_exit)(struct cui *cui,
 628                                 struct pmenu_item *item,
 629                                 struct pb_boot_data *bd))
 630 {
 631         struct boot_editor *boot_editor;
 632         int ncols1, ncols2, ncols3;
 633
 634         boot_editor = talloc_zero(cui, struct boot_editor);
 635
 636         if (!boot_editor)
 637                 return NULL;
 638
 639 #if defined(SIGNED_BOOT)
 640 #if !defined(HARD_LOCKDOWN)
 641         if (access(LOCKDOWN_FILE, F_OK) == -1)
 642                 boot_editor->use_signature_files = false;
 643         else
 644 #endif
 645                 boot_editor->use_signature_files = true;
 646 #else
 647         boot_editor->use_signature_files = false;
 648 #endif
 649
 650         talloc_set_destructor(boot_editor, boot_editor_destructor);
 651         boot_editor->cui = cui;
 652         boot_editor->item = item;
 653         boot_editor->on_exit = on_exit;
 654         boot_editor->state = STATE_EDIT;
 655         boot_editor->need_redraw = false;
 656         boot_editor->need_update = false;
 657
 658         ncols1 = strncols(_("Device tree:"));
 659         ncols2 = strncols(_("Boot arguments:"));
 660         if (boot_editor->use_signature_files)
 661                 ncols3 = strncols(_("Argument signature file:"));
 662         else
 663                 ncols3 = 0;
 664
 665         boot_editor->label_x = 1;
 666         boot_editor->field_x = 2 + max(max(ncols1, ncols2), ncols3);
 667
 668         nc_scr_init(&boot_editor->scr, pb_boot_editor_sig, 0,
 669                         cui, boot_editor_process_key,
 670                 boot_editor_post, boot_editor_unpost, boot_editor_resize);
 671
 672         boot_editor->scr.frame.ltitle = talloc_strdup(boot_editor,
 673                         _("Petitboot Option Editor"));
 674         boot_editor->scr.frame.rtitle = NULL;
 675         boot_editor->scr.frame.help = talloc_strdup(boot_editor,
 676                         _("tab=next, shift+tab=previous, x=exit, h=help"));
 677         nc_scr_frame_draw(&boot_editor->scr);
 678
 679         if (item) {
 680                 struct pb_boot_data *bd = cod_from_item(item)->bd;
 681                 boot_editor->image = talloc_strdup(boot_editor, bd->image);
 682                 boot_editor->initrd = talloc_strdup(boot_editor, bd->initrd);
 683                 boot_editor->dtb = talloc_strdup(boot_editor, bd->dtb);
 684                 boot_editor->args = talloc_strdup(boot_editor, bd->args);
 685                 if (boot_editor->use_signature_files)
 686                         boot_editor->args_sig_file = talloc_strdup(boot_editor,
 687                                         bd->args_sig_file);
 688                 else
 689                         boot_editor->args_sig_file = talloc_strdup(boot_editor,
 690                                         "");
 691                 boot_editor_find_device(boot_editor, bd, sysinfo);
 692         }
 693
 694         boot_editor_draw(boot_editor, sysinfo);
 695         wrefresh(boot_editor->scr.main_ncw);
 696
 697         return boot_editor;
 698 }