cmd/bootmenu.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2011-2013 Pali Rohár <pali.rohar@gmail.com>
   4  */
   5
   6 #include <common.h>
   7 #include <command.h>
   8 #include <ansi.h>
   9 #include <menu.h>
  10 #include <watchdog.h>
  11 #include <malloc.h>
  12 #include <linux/string.h>
  13
  14 /* maximum bootmenu entries */
  15 #define MAX_COUNT       99
  16
  17 /* maximal size of bootmenu env
  18  *  9 = strlen("bootmenu_")
  19  *  2 = strlen(MAX_COUNT)
  20  *  1 = NULL term
  21  */
  22 #define MAX_ENV_SIZE    (9 + 2 + 1)
  23
  24 struct bootmenu_entry {
  25         unsigned short int num;         /* unique number 0 .. MAX_COUNT */
  26         char key[3];                    /* key identifier of number */
  27         char *title;                    /* title of entry */
  28         char *command;                  /* hush command of entry */
  29         struct bootmenu_data *menu;     /* this bootmenu */
  30         struct bootmenu_entry *next;    /* next menu entry (num+1) */
  31 };
  32
  33 struct bootmenu_data {
  34         int delay;                      /* delay for autoboot */
  35         int active;                     /* active menu entry */
  36         int count;                      /* total count of menu entries */
  37         struct bootmenu_entry *first;   /* first menu entry */
  38 };
  39
  40 enum bootmenu_key {
  41         KEY_NONE = 0,
  42         KEY_UP,
  43         KEY_DOWN,
  44         KEY_SELECT,
  45 };
  46
  47 static char *bootmenu_getoption(unsigned short int n)
  48 {
  49         char name[MAX_ENV_SIZE];
  50
  51         if (n > MAX_COUNT)
  52                 return NULL;
  53
  54         sprintf(name, "bootmenu_%d", n);
  55         return env_get(name);
  56 }
  57
  58 static void bootmenu_print_entry(void *data)
  59 {
  60         struct bootmenu_entry *entry = data;
  61         int reverse = (entry->menu->active == entry->num);
  62
  63         /*
  64          * Move cursor to line where the entry will be drown (entry->num)
  65          * First 3 lines contain bootmenu header + 1 empty line
  66          */
  67         printf(ANSI_CURSOR_POSITION, entry->num + 4, 1);
  68
  69         puts("     ");
  70
  71         if (reverse)
  72                 puts(ANSI_COLOR_REVERSE);
  73
  74         puts(entry->title);
  75
  76         if (reverse)
  77                 puts(ANSI_COLOR_RESET);
  78 }
  79
  80 static void bootmenu_autoboot_loop(struct bootmenu_data *menu,
  81                                 enum bootmenu_key *key, int *esc)
  82 {
  83         int i, c;
  84
  85         if (menu->delay > 0) {
  86                 printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
  87                 printf("  Hit any key to stop autoboot: %2d ", menu->delay);
  88         }
  89
  90         while (menu->delay > 0) {
  91                 for (i = 0; i < 100; ++i) {
  92                         if (!tstc()) {
  93                                 WATCHDOG_RESET();
  94                                 mdelay(10);
  95                                 continue;
  96                         }
  97
  98                         menu->delay = -1;
  99                         c = getc();
 100
 101                         switch (c) {
 102                         case '\e':
 103                                 *esc = 1;
 104                                 *key = KEY_NONE;
 105                                 break;
 106                         case '\r':
 107                                 *key = KEY_SELECT;
 108                                 break;
 109                         default:
 110                                 *key = KEY_NONE;
 111                                 break;
 112                         }
 113
 114                         break;
 115                 }
 116
 117                 if (menu->delay < 0)
 118                         break;
 119
 120                 --menu->delay;
 121                 printf("\b\b\b%2d ", menu->delay);
 122         }
 123
 124         printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
 125         puts(ANSI_CLEAR_LINE);
 126
 127         if (menu->delay == 0)
 128                 *key = KEY_SELECT;
 129 }
 130
 131 static void bootmenu_loop(struct bootmenu_data *menu,
 132                 enum bootmenu_key *key, int *esc)
 133 {
 134         int c;
 135
 136         while (!tstc()) {
 137                 WATCHDOG_RESET();
 138                 mdelay(10);
 139         }
 140
 141         c = getc();
 142
 143         switch (*esc) {
 144         case 0:
 145                 /* First char of ANSI escape sequence '\e' */
 146                 if (c == '\e') {
 147                         *esc = 1;
 148                         *key = KEY_NONE;
 149                 }
 150                 break;
 151         case 1:
 152                 /* Second char of ANSI '[' */
 153                 if (c == '[') {
 154                         *esc = 2;
 155                         *key = KEY_NONE;
 156                 } else {
 157                         *esc = 0;
 158                 }
 159                 break;
 160         case 2:
 161         case 3:
 162                 /* Third char of ANSI (number '1') - optional */
 163                 if (*esc == 2 && c == '1') {
 164                         *esc = 3;
 165                         *key = KEY_NONE;
 166                         break;
 167                 }
 168
 169                 *esc = 0;
 170
 171                 /* ANSI 'A' - key up was pressed */
 172                 if (c == 'A')
 173                         *key = KEY_UP;
 174                 /* ANSI 'B' - key down was pressed */
 175                 else if (c == 'B')
 176                         *key = KEY_DOWN;
 177                 /* other key was pressed */
 178                 else
 179                         *key = KEY_NONE;
 180
 181                 break;
 182         }
 183
 184         /* enter key was pressed */
 185         if (c == '\r')
 186                 *key = KEY_SELECT;
 187 }
 188
 189 static char *bootmenu_choice_entry(void *data)
 190 {
 191         struct bootmenu_data *menu = data;
 192         struct bootmenu_entry *iter;
 193         enum bootmenu_key key = KEY_NONE;
 194         int esc = 0;
 195         int i;
 196
 197         while (1) {
 198                 if (menu->delay >= 0) {
 199                         /* Autoboot was not stopped */
 200                         bootmenu_autoboot_loop(menu, &key, &esc);
 201                 } else {
 202                         /* Some key was pressed, so autoboot was stopped */
 203                         bootmenu_loop(menu, &key, &esc);
 204                 }
 205
 206                 switch (key) {
 207                 case KEY_UP:
 208                         if (menu->active > 0)
 209                                 --menu->active;
 210                         /* no menu key selected, regenerate menu */
 211                         return NULL;
 212                 case KEY_DOWN:
 213                         if (menu->active < menu->count - 1)
 214                                 ++menu->active;
 215                         /* no menu key selected, regenerate menu */
 216                         return NULL;
 217                 case KEY_SELECT:
 218                         iter = menu->first;
 219                         for (i = 0; i < menu->active; ++i)
 220                                 iter = iter->next;
 221                         return iter->key;
 222                 default:
 223                         break;
 224                 }
 225         }
 226
 227         /* never happens */
 228         debug("bootmenu: this should not happen");
 229         return NULL;
 230 }
 231
 232 static void bootmenu_destroy(struct bootmenu_data *menu)
 233 {
 234         struct bootmenu_entry *iter = menu->first;
 235         struct bootmenu_entry *next;
 236
 237         while (iter) {
 238                 next = iter->next;
 239                 free(iter->title);
 240                 free(iter->command);
 241                 free(iter);
 242                 iter = next;
 243         }
 244         free(menu);
 245 }
 246
 247 static struct bootmenu_data *bootmenu_create(int delay)
 248 {
 249         unsigned short int i = 0;
 250         const char *option;
 251         struct bootmenu_data *menu;
 252         struct bootmenu_entry *iter = NULL;
 253
 254         int len;
 255         char *sep;
 256         char *default_str;
 257         struct bootmenu_entry *entry;
 258
 259         menu = malloc(sizeof(struct bootmenu_data));
 260         if (!menu)
 261                 return NULL;
 262
 263         menu->delay = delay;
 264         menu->active = 0;
 265         menu->first = NULL;
 266
 267         default_str = env_get("bootmenu_default");
 268         if (default_str)
 269                 menu->active = (int)simple_strtol(default_str, NULL, 10);
 270
 271         while ((option = bootmenu_getoption(i))) {
 272                 sep = strchr(option, '=');
 273                 if (!sep) {
 274                         printf("Invalid bootmenu entry: %s\n", option);
 275                         break;
 276                 }
 277
 278                 entry = malloc(sizeof(struct bootmenu_entry));
 279                 if (!entry)
 280                         goto cleanup;
 281
 282                 len = sep-option;
 283                 entry->title = malloc(len + 1);
 284                 if (!entry->title) {
 285                         free(entry);
 286                         goto cleanup;
 287                 }
 288                 memcpy(entry->title, option, len);
 289                 entry->title[len] = 0;
 290
 291                 len = strlen(sep + 1);
 292                 entry->command = malloc(len + 1);
 293                 if (!entry->command) {
 294                         free(entry->title);
 295                         free(entry);
 296                         goto cleanup;
 297                 }
 298                 memcpy(entry->command, sep + 1, len);
 299                 entry->command[len] = 0;
 300
 301                 sprintf(entry->key, "%d", i);
 302
 303                 entry->num = i;
 304                 entry->menu = menu;
 305                 entry->next = NULL;
 306
 307                 if (!iter)
 308                         menu->first = entry;
 309                 else
 310                         iter->next = entry;
 311
 312                 iter = entry;
 313                 ++i;
 314
 315                 if (i == MAX_COUNT - 1)
 316                         break;
 317         }
 318
 319         /* Add U-Boot console entry at the end */
 320         if (i <= MAX_COUNT - 1) {
 321                 entry = malloc(sizeof(struct bootmenu_entry));
 322                 if (!entry)
 323                         goto cleanup;
 324
 325                 entry->title = strdup("U-Boot console");
 326                 if (!entry->title) {
 327                         free(entry);
 328                         goto cleanup;
 329                 }
 330
 331                 entry->command = strdup("");
 332                 if (!entry->command) {
 333                         free(entry->title);
 334                         free(entry);
 335                         goto cleanup;
 336                 }
 337
 338                 sprintf(entry->key, "%d", i);
 339
 340                 entry->num = i;
 341                 entry->menu = menu;
 342                 entry->next = NULL;
 343
 344                 if (!iter)
 345                         menu->first = entry;
 346                 else
 347                         iter->next = entry;
 348
 349                 iter = entry;
 350                 ++i;
 351         }
 352
 353         menu->count = i;
 354
 355         if ((menu->active >= menu->count)||(menu->active < 0)) { //ensure active menuitem is inside menu
 356                 printf("active menuitem (%d) is outside menu (0..%d)\n",menu->active,menu->count-1);
 357                 menu->active=0;
 358         }
 359
 360         return menu;
 361
 362 cleanup:
 363         bootmenu_destroy(menu);
 364         return NULL;
 365 }
 366
 367 static void bootmenu_show(int delay)
 368 {
 369         int init = 0;
 370         void *choice = NULL;
 371         char *title = NULL;
 372         char *command = NULL;
 373         struct menu *menu;
 374         struct bootmenu_data *bootmenu;
 375         struct bootmenu_entry *iter;
 376         char *option, *sep;
 377
 378         /* If delay is 0 do not create menu, just run first entry */
 379         if (delay == 0) {
 380                 option = bootmenu_getoption(0);
 381                 if (!option) {
 382                         puts("bootmenu option 0 was not found\n");
 383                         return;
 384                 }
 385                 sep = strchr(option, '=');
 386                 if (!sep) {
 387                         puts("bootmenu option 0 is invalid\n");
 388                         return;
 389                 }
 390                 run_command(sep+1, 0);
 391                 return;
 392         }
 393
 394         bootmenu = bootmenu_create(delay);
 395         if (!bootmenu)
 396                 return;
 397
 398         menu = menu_create(NULL, bootmenu->delay, 1, bootmenu_print_entry,
 399                            bootmenu_choice_entry, bootmenu);
 400         if (!menu) {
 401                 bootmenu_destroy(bootmenu);
 402                 return;
 403         }
 404
 405         for (iter = bootmenu->first; iter; iter = iter->next) {
 406                 if (!menu_item_add(menu, iter->key, iter))
 407                         goto cleanup;
 408         }
 409
 410         /* Default menu entry is always first */
 411         menu_default_set(menu, "0");
 412
 413         puts(ANSI_CURSOR_HIDE);
 414         puts(ANSI_CLEAR_CONSOLE);
 415         printf(ANSI_CURSOR_POSITION, 1, 1);
 416
 417         init = 1;
 418
 419         if (menu_get_choice(menu, &choice)) {
 420                 iter = choice;
 421                 title = strdup(iter->title);
 422                 command = strdup(iter->command);
 423         }
 424
 425 cleanup:
 426         menu_destroy(menu);
 427         bootmenu_destroy(bootmenu);
 428
 429         if (init) {
 430                 puts(ANSI_CURSOR_SHOW);
 431                 puts(ANSI_CLEAR_CONSOLE);
 432                 printf(ANSI_CURSOR_POSITION, 1, 1);
 433         }
 434
 435         if (title && command) {
 436                 debug("Starting entry '%s'\n", title);
 437                 free(title);
 438                 run_command(command, 0);
 439                 free(command);
 440         }
 441
 442 #ifdef CONFIG_POSTBOOTMENU
 443         run_command(CONFIG_POSTBOOTMENU, 0);
 444 #endif
 445 }
 446
 447 void menu_display_statusline(struct menu *m)
 448 {
 449         struct bootmenu_entry *entry;
 450         struct bootmenu_data *menu;
 451
 452         if (menu_default_choice(m, (void *)&entry) < 0)
 453                 return;
 454
 455         menu = entry->menu;
 456
 457         printf(ANSI_CURSOR_POSITION, 1, 1);
 458         puts(ANSI_CLEAR_LINE);
 459         printf(ANSI_CURSOR_POSITION, 2, 1);
 460         puts("  *** U-Boot Boot Menu ***");
 461         puts(ANSI_CLEAR_LINE_TO_END);
 462         printf(ANSI_CURSOR_POSITION, 3, 1);
 463         puts(ANSI_CLEAR_LINE);
 464
 465         /* First 3 lines are bootmenu header + 2 empty lines between entries */
 466         printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
 467         puts(ANSI_CLEAR_LINE);
 468         printf(ANSI_CURSOR_POSITION, menu->count + 6, 1);
 469         puts("  Press UP/DOWN to move, ENTER to select");
 470         puts(ANSI_CLEAR_LINE_TO_END);
 471         printf(ANSI_CURSOR_POSITION, menu->count + 7, 1);
 472         puts(ANSI_CLEAR_LINE);
 473 }
 474
 475 #ifdef CONFIG_MENU_SHOW
 476 int menu_show(int bootdelay)
 477 {
 478         bootmenu_show(bootdelay);
 479         return -1; /* -1 - abort boot and run monitor code */
 480 }
 481 #endif
 482
 483 int do_bootmenu(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 484 {
 485         char *delay_str = NULL;
 486         int delay = 10;
 487
 488 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 489         delay = CONFIG_BOOTDELAY;
 490 #endif
 491
 492         if (argc >= 2)
 493                 delay_str = argv[1];
 494
 495         if (!delay_str)
 496                 delay_str = env_get("bootmenu_delay");
 497
 498         if (delay_str)
 499                 delay = (int)simple_strtol(delay_str, NULL, 10);
 500
 501         bootmenu_show(delay);
 502         return 0;
 503 }
 504
 505 U_BOOT_CMD(
 506         bootmenu, 2, 1, do_bootmenu,
 507         "ANSI terminal bootmenu",
 508         "[delay]\n"
 509         "    - show ANSI terminal bootmenu with autoboot delay"
 510 );