common/cmd_bootmenu.c

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