cmd/bootmenu.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2011-2013 Pali Rohár <pali@kernel.org>
   4  */
   5
   6 #include <common.h>
   7 #include <command.h>
   8 #include <ansi.h>
   9 #include <env.h>
  10 #include <log.h>
  11 #include <menu.h>
  12 #include <watchdog.h>
  13 #include <malloc.h>
  14 #include <linux/delay.h>
  15 #include <linux/string.h>
  16
  17 /* maximum bootmenu entries */
  18 #define MAX_COUNT       99
  19
  20 /* maximal size of bootmenu env
  21  *  9 = strlen("bootmenu_")
  22  *  2 = strlen(MAX_COUNT)
  23  *  1 = NULL term
  24  */
  25 #define MAX_ENV_SIZE    (9 + 2 + 1)
  26
  27 struct bootmenu_entry {
  28         unsigned short int num;         /* unique number 0 .. MAX_COUNT */
  29         char key[3];                    /* key identifier of number */
  30         char *title;                    /* title of entry */
  31         char *command;                  /* hush command of entry */
  32         struct bootmenu_data *menu;     /* this bootmenu */
  33         struct bootmenu_entry *next;    /* next menu entry (num+1) */
  34 };
  35
  36 struct bootmenu_data {
  37         int delay;                      /* delay for autoboot */
  38         int active;                     /* active menu entry */
  39         int count;                      /* total count of menu entries */
  40         struct bootmenu_entry *first;   /* first menu entry */
  41 };
  42
  43 enum bootmenu_key {
  44         KEY_NONE = 0,
  45         KEY_UP,
  46         KEY_DOWN,
  47         KEY_SELECT,
  48 };
  49
  50 static char *bootmenu_getoption(unsigned short int n)
  51 {
  52         char name[MAX_ENV_SIZE];
  53
  54         if (n > MAX_COUNT)
  55                 return NULL;
  56
  57         sprintf(name, "bootmenu_%d", n);
  58         return env_get(name);
  59 }
  60
  61 static void bootmenu_print_entry(void *data)
  62 {
  63         struct bootmenu_entry *entry = data;
  64         int reverse = (entry->menu->active == entry->num);
  65
  66         /*
  67          * Move cursor to line where the entry will be drown (entry->num)
  68          * First 3 lines contain bootmenu header + 1 empty line
  69          */
  70         printf(ANSI_CURSOR_POSITION, entry->num + 4, 1);
  71
  72         puts("     ");
  73
  74         if (reverse)
  75                 puts(ANSI_COLOR_REVERSE);
  76
  77         puts(entry->title);
  78
  79         if (reverse)
  80                 puts(ANSI_COLOR_RESET);
  81 }
  82
  83 static void bootmenu_autoboot_loop(struct bootmenu_data *menu,
  84                                 enum bootmenu_key *key, int *esc)
  85 {
  86         int i, c;
  87
  88         if (menu->delay > 0) {
  89                 printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
  90                 printf("  Hit any key to stop autoboot: %2d ", menu->delay);
  91         }
  92
  93         while (menu->delay > 0) {
  94                 for (i = 0; i < 100; ++i) {
  95                         if (!tstc()) {
  96                                 WATCHDOG_RESET();
  97                                 mdelay(10);
  98                                 continue;
  99                         }
 100
 101                         menu->delay = -1;
 102                         c = getc();
 103
 104                         switch (c) {
 105                         case '\e':
 106                                 *esc = 1;
 107                                 *key = KEY_NONE;
 108                                 break;
 109                         case '\r':
 110                                 *key = KEY_SELECT;
 111                                 break;
 112                         default:
 113                                 *key = KEY_NONE;
 114                                 break;
 115                         }
 116
 117                         break;
 118                 }
 119
 120                 if (menu->delay < 0)
 121                         break;
 122
 123                 --menu->delay;
 124                 printf("\b\b\b%2d ", menu->delay);
 125         }
 126
 127         printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
 128         puts(ANSI_CLEAR_LINE);
 129
 130         if (menu->delay == 0)
 131                 *key = KEY_SELECT;
 132 }
 133
 134 static void bootmenu_loop(struct bootmenu_data *menu,
 135                 enum bootmenu_key *key, int *esc)
 136 {
 137         int c;
 138
 139         while (!tstc()) {
 140                 WATCHDOG_RESET();
 141                 mdelay(10);
 142         }
 143
 144         c = getc();
 145
 146         switch (*esc) {
 147         case 0:
 148                 /* First char of ANSI escape sequence '\e' */
 149                 if (c == '\e') {
 150                         *esc = 1;
 151                         *key = KEY_NONE;
 152                 }
 153                 break;
 154         case 1:
 155                 /* Second char of ANSI '[' */
 156                 if (c == '[') {
 157                         *esc = 2;
 158                         *key = KEY_NONE;
 159                 } else {
 160                         *esc = 0;
 161                 }
 162                 break;
 163         case 2:
 164         case 3:
 165                 /* Third char of ANSI (number '1') - optional */
 166                 if (*esc == 2 && c == '1') {
 167                         *esc = 3;
 168                         *key = KEY_NONE;
 169                         break;
 170                 }
 171
 172                 *esc = 0;
 173
 174                 /* ANSI 'A' - key up was pressed */
 175                 if (c == 'A')
 176                         *key = KEY_UP;
 177                 /* ANSI 'B' - key down was pressed */
 178                 else if (c == 'B')
 179                         *key = KEY_DOWN;
 180                 /* other key was pressed */
 181                 else
 182                         *key = KEY_NONE;
 183
 184                 break;
 185         }
 186
 187         /* enter key was pressed */
 188         if (c == '\r')
 189                 *key = KEY_SELECT;
 190 }
 191
 192 static char *bootmenu_choice_entry(void *data)
 193 {
 194         struct bootmenu_data *menu = data;
 195         struct bootmenu_entry *iter;
 196         enum bootmenu_key key = KEY_NONE;
 197         int esc = 0;
 198         int i;
 199
 200         while (1) {
 201                 if (menu->delay >= 0) {
 202                         /* Autoboot was not stopped */
 203                         bootmenu_autoboot_loop(menu, &key, &esc);
 204                 } else {
 205                         /* Some key was pressed, so autoboot was stopped */
 206                         bootmenu_loop(menu, &key, &esc);
 207                 }
 208
 209                 switch (key) {
 210                 case KEY_UP:
 211                         if (menu->active > 0)
 212                                 --menu->active;
 213                         /* no menu key selected, regenerate menu */
 214                         return NULL;
 215                 case KEY_DOWN:
 216                         if (menu->active < menu->count - 1)
 217                                 ++menu->active;
 218                         /* no menu key selected, regenerate menu */
 219                         return NULL;
 220                 case KEY_SELECT:
 221                         iter = menu->first;
 222                         for (i = 0; i < menu->active; ++i)
 223                                 iter = iter->next;
 224                         return iter->key;
 225                 default:
 226                         break;
 227                 }
 228         }
 229
 230         /* never happens */
 231         debug("bootmenu: this should not happen");
 232         return NULL;
 233 }
 234
 235 static void bootmenu_destroy(struct bootmenu_data *menu)
 236 {
 237         struct bootmenu_entry *iter = menu->first;
 238         struct bootmenu_entry *next;
 239
 240         while (iter) {
 241                 next = iter->next;
 242                 free(iter->title);
 243                 free(iter->command);
 244                 free(iter);
 245                 iter = next;
 246         }
 247         free(menu);
 248 }
 249
 250 static struct bootmenu_data *bootmenu_create(int delay)
 251 {
 252         unsigned short int i = 0;
 253         const char *option;
 254         struct bootmenu_data *menu;
 255         struct bootmenu_entry *iter = NULL;
 256
 257         int len;
 258         char *sep;
 259         char *default_str;
 260         struct bootmenu_entry *entry;
 261
 262         menu = malloc(sizeof(struct bootmenu_data));
 263         if (!menu)
 264                 return NULL;
 265
 266         menu->delay = delay;
 267         menu->active = 0;
 268         menu->first = NULL;
 269
 270         default_str = env_get("bootmenu_default");
 271         if (default_str)
 272                 menu->active = (int)simple_strtol(default_str, NULL, 10);
 273
 274         while ((option = bootmenu_getoption(i))) {
 275                 sep = strchr(option, '=');
 276                 if (!sep) {
 277                         printf("Invalid bootmenu entry: %s\n", option);
 278                         break;
 279                 }
 280
 281                 entry = malloc(sizeof(struct bootmenu_entry));
 282                 if (!entry)
 283                         goto cleanup;
 284
 285                 len = sep-option;
 286                 entry->title = malloc(len + 1);
 287                 if (!entry->title) {
 288                         free(entry);
 289                         goto cleanup;
 290                 }
 291                 memcpy(entry->title, option, len);
 292                 entry->title[len] = 0;
 293
 294                 len = strlen(sep + 1);
 295                 entry->command = malloc(len + 1);
 296                 if (!entry->command) {
 297                         free(entry->title);
 298                         free(entry);
 299                         goto cleanup;
 300                 }
 301                 memcpy(entry->command, sep + 1, len);
 302                 entry->command[len] = 0;
 303
 304                 sprintf(entry->key, "%d", i);
 305
 306                 entry->num = i;
 307                 entry->menu = menu;
 308                 entry->next = NULL;
 309
 310                 if (!iter)
 311                         menu->first = entry;
 312                 else
 313                         iter->next = entry;
 314
 315                 iter = entry;
 316                 ++i;
 317
 318                 if (i == MAX_COUNT - 1)
 319                         break;
 320         }
 321
 322         /* Add U-Boot console entry at the end */
 323         if (i <= MAX_COUNT - 1) {
 324                 entry = malloc(sizeof(struct bootmenu_entry));
 325                 if (!entry)
 326                         goto cleanup;
 327
 328                 entry->title = strdup("U-Boot console");
 329                 if (!entry->title) {
 330                         free(entry);
 331                         goto cleanup;
 332                 }
 333
 334                 entry->command = strdup("");
 335                 if (!entry->command) {
 336                         free(entry->title);
 337                         free(entry);
 338                         goto cleanup;
 339                 }
 340
 341                 sprintf(entry->key, "%d", i);
 342
 343                 entry->num = i;
 344                 entry->menu = menu;
 345                 entry->next = NULL;
 346
 347                 if (!iter)
 348                         menu->first = entry;
 349                 else
 350                         iter->next = entry;
 351
 352                 iter = entry;
 353                 ++i;
 354         }
 355
 356         menu->count = i;
 357
 358         if ((menu->active >= menu->count)||(menu->active < 0)) { //ensure active menuitem is inside menu
 359                 printf("active menuitem (%d) is outside menu (0..%d)\n",menu->active,menu->count-1);
 360                 menu->active=0;
 361         }
 362
 363         return menu;
 364
 365 cleanup:
 366         bootmenu_destroy(menu);
 367         return NULL;
 368 }
 369
 370 static void menu_display_statusline(struct menu *m)
 371 {
 372         struct bootmenu_entry *entry;
 373         struct bootmenu_data *menu;
 374
 375         if (menu_default_choice(m, (void *)&entry) < 0)
 376                 return;
 377
 378         menu = entry->menu;
 379
 380         printf(ANSI_CURSOR_POSITION, 1, 1);
 381         puts(ANSI_CLEAR_LINE);
 382         printf(ANSI_CURSOR_POSITION, 2, 1);
 383         puts("  *** U-Boot Boot Menu ***");
 384         puts(ANSI_CLEAR_LINE_TO_END);
 385         printf(ANSI_CURSOR_POSITION, 3, 1);
 386         puts(ANSI_CLEAR_LINE);
 387
 388         /* First 3 lines are bootmenu header + 2 empty lines between entries */
 389         printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
 390         puts(ANSI_CLEAR_LINE);
 391         printf(ANSI_CURSOR_POSITION, menu->count + 6, 1);
 392         puts("  Press UP/DOWN to move, ENTER to select");
 393         puts(ANSI_CLEAR_LINE_TO_END);
 394         printf(ANSI_CURSOR_POSITION, menu->count + 7, 1);
 395         puts(ANSI_CLEAR_LINE);
 396 }
 397
 398 static void bootmenu_show(int delay)
 399 {
 400         int init = 0;
 401         void *choice = NULL;
 402         char *title = NULL;
 403         char *command = NULL;
 404         struct menu *menu;
 405         struct bootmenu_data *bootmenu;
 406         struct bootmenu_entry *iter;
 407         char *option, *sep;
 408
 409         /* If delay is 0 do not create menu, just run first entry */
 410         if (delay == 0) {
 411                 option = bootmenu_getoption(0);
 412                 if (!option) {
 413                         puts("bootmenu option 0 was not found\n");
 414                         return;
 415                 }
 416                 sep = strchr(option, '=');
 417                 if (!sep) {
 418                         puts("bootmenu option 0 is invalid\n");
 419                         return;
 420                 }
 421                 run_command(sep+1, 0);
 422                 return;
 423         }
 424
 425         bootmenu = bootmenu_create(delay);
 426         if (!bootmenu)
 427                 return;
 428
 429         menu = menu_create(NULL, bootmenu->delay, 1, menu_display_statusline,
 430                            bootmenu_print_entry, bootmenu_choice_entry,
 431                            bootmenu);
 432         if (!menu) {
 433                 bootmenu_destroy(bootmenu);
 434                 return;
 435         }
 436
 437         for (iter = bootmenu->first; iter; iter = iter->next) {
 438                 if (!menu_item_add(menu, iter->key, iter))
 439                         goto cleanup;
 440         }
 441
 442         /* Default menu entry is always first */
 443         menu_default_set(menu, "0");
 444
 445         puts(ANSI_CURSOR_HIDE);
 446         puts(ANSI_CLEAR_CONSOLE);
 447         printf(ANSI_CURSOR_POSITION, 1, 1);
 448
 449         init = 1;
 450
 451         if (menu_get_choice(menu, &choice)) {
 452                 iter = choice;
 453                 title = strdup(iter->title);
 454                 command = strdup(iter->command);
 455         }
 456
 457 cleanup:
 458         menu_destroy(menu);
 459         bootmenu_destroy(bootmenu);
 460
 461         if (init) {
 462                 puts(ANSI_CURSOR_SHOW);
 463                 puts(ANSI_CLEAR_CONSOLE);
 464                 printf(ANSI_CURSOR_POSITION, 1, 1);
 465         }
 466
 467         if (title && command) {
 468                 debug("Starting entry '%s'\n", title);
 469                 free(title);
 470                 run_command(command, 0);
 471                 free(command);
 472         }
 473
 474 #ifdef CONFIG_POSTBOOTMENU
 475         run_command(CONFIG_POSTBOOTMENU, 0);
 476 #endif
 477 }
 478
 479 #ifdef CONFIG_AUTOBOOT_MENU_SHOW
 480 int menu_show(int bootdelay)
 481 {
 482         bootmenu_show(bootdelay);
 483         return -1; /* -1 - abort boot and run monitor code */
 484 }
 485 #endif
 486
 487 int do_bootmenu(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 488 {
 489         char *delay_str = NULL;
 490         int delay = 10;
 491
 492 #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
 493         delay = CONFIG_BOOTDELAY;
 494 #endif
 495
 496         if (argc >= 2)
 497                 delay_str = argv[1];
 498
 499         if (!delay_str)
 500                 delay_str = env_get("bootmenu_delay");
 501
 502         if (delay_str)
 503                 delay = (int)simple_strtol(delay_str, NULL, 10);
 504
 505         bootmenu_show(delay);
 506         return 0;
 507 }
 508
 509 U_BOOT_CMD(
 510         bootmenu, 2, 1, do_bootmenu,
 511         "ANSI terminal bootmenu",
 512         "[delay]\n"
 513         "    - show ANSI terminal bootmenu with autoboot delay"
 514 );