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u-boot/cmd/bootmenu.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2011-2013 Pali Rohár <pali@kernel.org>
*/
#include <common.h>
#include <command.h>
#include <ansi.h>
#include <env.h>
#include <log.h>
#include <menu.h>
#include <watchdog.h>
#include <malloc.h>
#include <linux/delay.h>
#include <linux/string.h>
/* maximum bootmenu entries */
#define MAX_COUNT 99
/* maximal size of bootmenu env
* 9 = strlen("bootmenu_")
* 2 = strlen(MAX_COUNT)
* 1 = NULL term
*/
#define MAX_ENV_SIZE (9 + 2 + 1)
struct bootmenu_entry {
unsigned short int num; /* unique number 0 .. MAX_COUNT */
char key[3]; /* key identifier of number */
char *title; /* title of entry */
char *command; /* hush command of entry */
struct bootmenu_data *menu; /* this bootmenu */
struct bootmenu_entry *next; /* next menu entry (num+1) */
};
struct bootmenu_data {
int delay; /* delay for autoboot */
int active; /* active menu entry */
int count; /* total count of menu entries */
struct bootmenu_entry *first; /* first menu entry */
};
enum bootmenu_key {
KEY_NONE = 0,
KEY_UP,
KEY_DOWN,
KEY_SELECT,
KEY_QUIT,
};
static char *bootmenu_getoption(unsigned short int n)
{
char name[MAX_ENV_SIZE];
if (n > MAX_COUNT)
return NULL;
sprintf(name, "bootmenu_%d", n);
return env_get(name);
}
static void bootmenu_print_entry(void *data)
{
struct bootmenu_entry *entry = data;
int reverse = (entry->menu->active == entry->num);
/*
* Move cursor to line where the entry will be drown (entry->num)
* First 3 lines contain bootmenu header + 1 empty line
*/
printf(ANSI_CURSOR_POSITION, entry->num + 4, 1);
puts(" ");
if (reverse)
puts(ANSI_COLOR_REVERSE);
puts(entry->title);
if (reverse)
puts(ANSI_COLOR_RESET);
}
static void bootmenu_autoboot_loop(struct bootmenu_data *menu,
enum bootmenu_key *key, int *esc)
{
int i, c;
if (menu->delay > 0) {
printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
printf(" Hit any key to stop autoboot: %2d ", menu->delay);
}
while (menu->delay > 0) {
for (i = 0; i < 100; ++i) {
if (!tstc()) {
WATCHDOG_RESET();
mdelay(10);
continue;
}
menu->delay = -1;
c = getchar();
switch (c) {
case '\e':
*esc = 1;
*key = KEY_NONE;
break;
case '\r':
*key = KEY_SELECT;
break;
case 0x3: /* ^C */
*key = KEY_QUIT;
break;
default:
*key = KEY_NONE;
break;
}
break;
}
if (menu->delay < 0)
break;
--menu->delay;
printf("\b\b\b%2d ", menu->delay);
}
printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
puts(ANSI_CLEAR_LINE);
if (menu->delay == 0)
*key = KEY_SELECT;
}
static void bootmenu_loop(struct bootmenu_data *menu,
enum bootmenu_key *key, int *esc)
{
int c;
if (*esc == 1) {
if (tstc()) {
c = getchar();
} else {
WATCHDOG_RESET();
mdelay(10);
if (tstc())
c = getchar();
else
c = '\e';
}
} else {
while (!tstc()) {
WATCHDOG_RESET();
mdelay(10);
}
c = getchar();
}
switch (*esc) {
case 0:
/* First char of ANSI escape sequence '\e' */
if (c == '\e') {
*esc = 1;
*key = KEY_NONE;
}
break;
case 1:
/* Second char of ANSI '[' */
if (c == '[') {
*esc = 2;
*key = KEY_NONE;
} else {
/* Alone ESC key was pressed */
*key = KEY_QUIT;
*esc = (c == '\e') ? 1 : 0;
}
break;
case 2:
case 3:
/* Third char of ANSI (number '1') - optional */
if (*esc == 2 && c == '1') {
*esc = 3;
*key = KEY_NONE;
break;
}
*esc = 0;
/* ANSI 'A' - key up was pressed */
if (c == 'A')
*key = KEY_UP;
/* ANSI 'B' - key down was pressed */
else if (c == 'B')
*key = KEY_DOWN;
/* other key was pressed */
else
*key = KEY_NONE;
break;
}
/* enter key was pressed */
if (c == '\r')
*key = KEY_SELECT;
/* ^C was pressed */
if (c == 0x3)
*key = KEY_QUIT;
}
static char *bootmenu_choice_entry(void *data)
{
struct bootmenu_data *menu = data;
struct bootmenu_entry *iter;
enum bootmenu_key key = KEY_NONE;
int esc = 0;
int i;
while (1) {
if (menu->delay >= 0) {
/* Autoboot was not stopped */
bootmenu_autoboot_loop(menu, &key, &esc);
} else {
/* Some key was pressed, so autoboot was stopped */
bootmenu_loop(menu, &key, &esc);
}
switch (key) {
case KEY_UP:
if (menu->active > 0)
--menu->active;
/* no menu key selected, regenerate menu */
return NULL;
case KEY_DOWN:
if (menu->active < menu->count - 1)
++menu->active;
/* no menu key selected, regenerate menu */
return NULL;
case KEY_SELECT:
iter = menu->first;
for (i = 0; i < menu->active; ++i)
iter = iter->next;
return iter->key;
case KEY_QUIT:
/* Quit by choosing the last entry - U-Boot console */
iter = menu->first;
while (iter->next)
iter = iter->next;
return iter->key;
default:
break;
}
}
/* never happens */
debug("bootmenu: this should not happen");
return NULL;
}
static void bootmenu_destroy(struct bootmenu_data *menu)
{
struct bootmenu_entry *iter = menu->first;
struct bootmenu_entry *next;
while (iter) {
next = iter->next;
free(iter->title);
free(iter->command);
free(iter);
iter = next;
}
free(menu);
}
static struct bootmenu_data *bootmenu_create(int delay)
{
unsigned short int i = 0;
const char *option;
struct bootmenu_data *menu;
struct bootmenu_entry *iter = NULL;
int len;
char *sep;
char *default_str;
struct bootmenu_entry *entry;
menu = malloc(sizeof(struct bootmenu_data));
if (!menu)
return NULL;
menu->delay = delay;
menu->active = 0;
menu->first = NULL;
default_str = env_get("bootmenu_default");
if (default_str)
menu->active = (int)simple_strtol(default_str, NULL, 10);
while ((option = bootmenu_getoption(i))) {
sep = strchr(option, '=');
if (!sep) {
printf("Invalid bootmenu entry: %s\n", option);
break;
}
entry = malloc(sizeof(struct bootmenu_entry));
if (!entry)
goto cleanup;
len = sep-option;
entry->title = malloc(len + 1);
if (!entry->title) {
free(entry);
goto cleanup;
}
memcpy(entry->title, option, len);
entry->title[len] = 0;
len = strlen(sep + 1);
entry->command = malloc(len + 1);
if (!entry->command) {
free(entry->title);
free(entry);
goto cleanup;
}
memcpy(entry->command, sep + 1, len);
entry->command[len] = 0;
sprintf(entry->key, "%d", i);
entry->num = i;
entry->menu = menu;
entry->next = NULL;
if (!iter)
menu->first = entry;
else
iter->next = entry;
iter = entry;
++i;
if (i == MAX_COUNT - 1)
break;
}
/* Add U-Boot console entry at the end */
if (i <= MAX_COUNT - 1) {
entry = malloc(sizeof(struct bootmenu_entry));
if (!entry)
goto cleanup;
entry->title = strdup("U-Boot console");
if (!entry->title) {
free(entry);
goto cleanup;
}
entry->command = strdup("");
if (!entry->command) {
free(entry->title);
free(entry);
goto cleanup;
}
sprintf(entry->key, "%d", i);
entry->num = i;
entry->menu = menu;
entry->next = NULL;
if (!iter)
menu->first = entry;
else
iter->next = entry;
iter = entry;
++i;
}
menu->count = i;
if ((menu->active >= menu->count)||(menu->active < 0)) { //ensure active menuitem is inside menu
printf("active menuitem (%d) is outside menu (0..%d)\n",menu->active,menu->count-1);
menu->active=0;
}
return menu;
cleanup:
bootmenu_destroy(menu);
return NULL;
}
static void menu_display_statusline(struct menu *m)
{
struct bootmenu_entry *entry;
struct bootmenu_data *menu;
if (menu_default_choice(m, (void *)&entry) < 0)
return;
menu = entry->menu;
printf(ANSI_CURSOR_POSITION, 1, 1);
puts(ANSI_CLEAR_LINE);
printf(ANSI_CURSOR_POSITION, 2, 1);
puts(" *** U-Boot Boot Menu ***");
puts(ANSI_CLEAR_LINE_TO_END);
printf(ANSI_CURSOR_POSITION, 3, 1);
puts(ANSI_CLEAR_LINE);
/* First 3 lines are bootmenu header + 2 empty lines between entries */
printf(ANSI_CURSOR_POSITION, menu->count + 5, 1);
puts(ANSI_CLEAR_LINE);
printf(ANSI_CURSOR_POSITION, menu->count + 6, 1);
puts(" Press UP/DOWN to move, ENTER to select, ESC/CTRL+C to quit");
puts(ANSI_CLEAR_LINE_TO_END);
printf(ANSI_CURSOR_POSITION, menu->count + 7, 1);
puts(ANSI_CLEAR_LINE);
}
static void bootmenu_show(int delay)
{
int init = 0;
void *choice = NULL;
char *title = NULL;
char *command = NULL;
struct menu *menu;
struct bootmenu_data *bootmenu;
struct bootmenu_entry *iter;
char *option, *sep;
/* If delay is 0 do not create menu, just run first entry */
if (delay == 0) {
option = bootmenu_getoption(0);
if (!option) {
puts("bootmenu option 0 was not found\n");
return;
}
sep = strchr(option, '=');
if (!sep) {
puts("bootmenu option 0 is invalid\n");
return;
}
run_command(sep+1, 0);
return;
}
bootmenu = bootmenu_create(delay);
if (!bootmenu)
return;
menu = menu_create(NULL, bootmenu->delay, 1, menu_display_statusline,
bootmenu_print_entry, bootmenu_choice_entry,
bootmenu);
if (!menu) {
bootmenu_destroy(bootmenu);
return;
}
for (iter = bootmenu->first; iter; iter = iter->next) {
if (menu_item_add(menu, iter->key, iter) != 1)
goto cleanup;
}
/* Default menu entry is always first */
menu_default_set(menu, "0");
puts(ANSI_CURSOR_HIDE);
puts(ANSI_CLEAR_CONSOLE);
printf(ANSI_CURSOR_POSITION, 1, 1);
init = 1;
if (menu_get_choice(menu, &choice) == 1) {
iter = choice;
title = strdup(iter->title);
command = strdup(iter->command);
}
cleanup:
menu_destroy(menu);
bootmenu_destroy(bootmenu);
if (init) {
puts(ANSI_CURSOR_SHOW);
puts(ANSI_CLEAR_CONSOLE);
printf(ANSI_CURSOR_POSITION, 1, 1);
}
if (title && command) {
debug("Starting entry '%s'\n", title);
free(title);
run_command(command, 0);
free(command);
}
#ifdef CONFIG_POSTBOOTMENU
run_command(CONFIG_POSTBOOTMENU, 0);
#endif
}
#ifdef CONFIG_AUTOBOOT_MENU_SHOW
int menu_show(int bootdelay)
{
bootmenu_show(bootdelay);
return -1; /* -1 - abort boot and run monitor code */
}
#endif
int do_bootmenu(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
char *delay_str = NULL;
int delay = 10;
#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
delay = CONFIG_BOOTDELAY;
#endif
if (argc >= 2)
delay_str = argv[1];
if (!delay_str)
delay_str = env_get("bootmenu_delay");
if (delay_str)
delay = (int)simple_strtol(delay_str, NULL, 10);
bootmenu_show(delay);
return 0;
}
U_BOOT_CMD(
bootmenu, 2, 1, do_bootmenu,
"ANSI terminal bootmenu",
"[delay]\n"
" - show ANSI terminal bootmenu with autoboot delay"
);