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 <charset.h>
#include <common.h>
#include <command.h>
#include <ansi.h>
#include <efi_loader.h>
#include <efi_variable.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)
enum bootmenu_ret {
BOOTMENU_RET_SUCCESS = 0,
BOOTMENU_RET_FAIL,
BOOTMENU_RET_QUIT,
BOOTMENU_RET_UPDATED,
};
enum boot_type {
BOOTMENU_TYPE_NONE = 0,
BOOTMENU_TYPE_BOOTMENU,
BOOTMENU_TYPE_UEFI_BOOT_OPTION,
};
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 */
enum boot_type type; /* boot type of entry */
u16 bootorder; /* order for each boot type */
struct bootmenu_data *menu; /* this bootmenu */
struct bootmenu_entry *next; /* next menu entry (num+1) */
};
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, 7);
if (reverse)
puts(ANSI_COLOR_REVERSE);
printf("%s", entry->title);
if (reverse)
puts(ANSI_COLOR_RESET);
}
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);
}
/**
* prepare_bootmenu_entry() - generate the bootmenu_xx entries
*
* This function read the "bootmenu_x" U-Boot environment variable
* and generate the bootmenu entries.
*
* @menu: pointer to the bootmenu structure
* @current: pointer to the last bootmenu entry list
* @index: pointer to the index of the last bootmenu entry,
* the number of bootmenu entry is added by this function
* Return: 1 on success, negative value on error
*/
static int prepare_bootmenu_entry(struct bootmenu_data *menu,
struct bootmenu_entry **current,
unsigned short int *index)
{
char *sep;
const char *option;
unsigned short int i = *index;
struct bootmenu_entry *entry = NULL;
struct bootmenu_entry *iter = *current;
while ((option = bootmenu_getoption(i))) {
/* bootmenu_[num] format is "[title]=[commands]" */
sep = strchr(option, '=');
if (!sep) {
printf("Invalid bootmenu entry: %s\n", option);
break;
}
entry = malloc(sizeof(struct bootmenu_entry));
if (!entry)
return -ENOMEM;
entry->title = strndup(option, sep - option);
if (!entry->title) {
free(entry);
return -ENOMEM;
}
entry->command = strdup(sep + 1);
if (!entry->command) {
free(entry->title);
free(entry);
return -ENOMEM;
}
sprintf(entry->key, "%d", i);
entry->num = i;
entry->menu = menu;
entry->type = BOOTMENU_TYPE_BOOTMENU;
entry->bootorder = i;
entry->next = NULL;
if (!iter)
menu->first = entry;
else
iter->next = entry;
iter = entry;
++i;
if (i == MAX_COUNT - 1)
break;
}
*index = i;
*current = iter;
return 1;
}
#if (CONFIG_IS_ENABLED(CMD_BOOTEFI_BOOTMGR))
/**
* prepare_uefi_bootorder_entry() - generate the uefi bootmenu entries
*
* This function read the "BootOrder" UEFI variable
* and generate the bootmenu entries in the order of "BootOrder".
*
* @menu: pointer to the bootmenu structure
* @current: pointer to the last bootmenu entry list
* @index: pointer to the index of the last bootmenu entry,
* the number of uefi entry is added by this function
* Return: 1 on success, negative value on error
*/
static int prepare_uefi_bootorder_entry(struct bootmenu_data *menu,
struct bootmenu_entry **current,
unsigned short int *index)
{
u16 *bootorder;
efi_status_t ret;
unsigned short j;
efi_uintn_t num, size;
void *load_option;
struct efi_load_option lo;
u16 varname[] = u"Boot####";
unsigned short int i = *index;
struct bootmenu_entry *entry = NULL;
struct bootmenu_entry *iter = *current;
bootorder = efi_get_var(u"BootOrder", &efi_global_variable_guid, &size);
if (!bootorder)
return -ENOENT;
num = size / sizeof(u16);
for (j = 0; j < num; j++) {
entry = malloc(sizeof(struct bootmenu_entry));
if (!entry)
return -ENOMEM;
efi_create_indexed_name(varname, sizeof(varname),
"Boot", bootorder[j]);
load_option = efi_get_var(varname, &efi_global_variable_guid, &size);
if (!load_option)
continue;
ret = efi_deserialize_load_option(&lo, load_option, &size);
if (ret != EFI_SUCCESS) {
log_warning("Invalid load option for %ls\n", varname);
free(load_option);
free(entry);
continue;
}
if (lo.attributes & LOAD_OPTION_ACTIVE) {
char *buf;
buf = calloc(1, utf16_utf8_strlen(lo.label) + 1);
if (!buf) {
free(load_option);
free(entry);
free(bootorder);
return -ENOMEM;
}
entry->title = buf;
utf16_utf8_strncpy(&buf, lo.label, u16_strlen(lo.label));
entry->command = strdup("bootefi bootmgr");
sprintf(entry->key, "%d", i);
entry->num = i;
entry->menu = menu;
entry->type = BOOTMENU_TYPE_UEFI_BOOT_OPTION;
entry->bootorder = bootorder[j];
entry->next = NULL;
if (!iter)
menu->first = entry;
else
iter->next = entry;
iter = entry;
i++;
}
free(load_option);
if (i == MAX_COUNT - 1)
break;
}
free(bootorder);
*index = i;
*current = iter;
return 1;
}
#endif
static struct bootmenu_data *bootmenu_create(int delay)
{
int ret;
unsigned short int i = 0;
struct bootmenu_data *menu;
struct bootmenu_entry *iter = NULL;
struct bootmenu_entry *entry;
char *default_str;
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);
ret = prepare_bootmenu_entry(menu, &iter, &i);
if (ret < 0)
goto cleanup;
#if (CONFIG_IS_ENABLED(CMD_BOOTEFI_BOOTMGR))
if (i < MAX_COUNT - 1) {
ret = prepare_uefi_bootorder_entry(menu, &iter, &i);
if (ret < 0 && ret != -ENOENT)
goto cleanup;
}
#endif
/* Add U-Boot console entry at the end */
if (i <= MAX_COUNT - 1) {
entry = malloc(sizeof(struct bootmenu_entry));
if (!entry)
goto cleanup;
/* Add Quit entry if entering U-Boot console is disabled */
if (!IS_ENABLED(CONFIG_BOOTMENU_DISABLE_UBOOT_CONSOLE))
entry->title = strdup("U-Boot console");
else
entry->title = strdup("Quit");
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->type = BOOTMENU_TYPE_NONE;
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, 3);
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, 3);
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 handle_uefi_bootnext(void)
{
u16 bootnext;
efi_status_t ret;
efi_uintn_t size;
/* Initialize EFI drivers */
ret = efi_init_obj_list();
if (ret != EFI_SUCCESS) {
log_err("Error: Cannot initialize UEFI sub-system, r = %lu\n",
ret & ~EFI_ERROR_MASK);
return;
}
/* If UEFI BootNext variable is set, boot the BootNext load option */
size = sizeof(u16);
ret = efi_get_variable_int(u"BootNext",
&efi_global_variable_guid,
NULL, &size, &bootnext, NULL);
if (ret == EFI_SUCCESS)
/* BootNext does exist here, try to boot */
run_command("bootefi bootmgr", 0);
}
static enum bootmenu_ret bootmenu_show(int delay)
{
int cmd_ret;
int init = 0;
void *choice = NULL;
char *title = NULL;
char *command = NULL;
struct menu *menu;
struct bootmenu_entry *iter;
int ret = BOOTMENU_RET_SUCCESS;
struct bootmenu_data *bootmenu;
efi_status_t efi_ret = EFI_SUCCESS;
char *option, *sep;
if (IS_ENABLED(CONFIG_CMD_BOOTEFI_BOOTMGR))
handle_uefi_bootnext();
/* 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 BOOTMENU_RET_FAIL;
}
sep = strchr(option, '=');
if (!sep) {
puts("bootmenu option 0 is invalid\n");
return BOOTMENU_RET_FAIL;
}
cmd_ret = run_command(sep + 1, 0);
return (cmd_ret == CMD_RET_SUCCESS ? BOOTMENU_RET_SUCCESS : BOOTMENU_RET_FAIL);
}
bootmenu = bootmenu_create(delay);
if (!bootmenu)
return BOOTMENU_RET_FAIL;
menu = menu_create(NULL, bootmenu->delay, 1, menu_display_statusline,
bootmenu_print_entry, bootmenu_choice_entry,
bootmenu);
if (!menu) {
bootmenu_destroy(bootmenu);
return BOOTMENU_RET_FAIL;
}
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);
/* last entry is U-Boot console or Quit */
if (iter->num == iter->menu->count - 1) {
ret = BOOTMENU_RET_QUIT;
goto cleanup;
}
} else {
goto cleanup;
}
/*
* If the selected entry is UEFI BOOT####, set the BootNext variable.
* Then uefi bootmgr is invoked by the preset command in iter->command.
*/
if (IS_ENABLED(CONFIG_CMD_BOOTEFI_BOOTMGR)) {
if (iter->type == BOOTMENU_TYPE_UEFI_BOOT_OPTION) {
/*
* UEFI specification requires BootNext variable needs non-volatile
* attribute, but this BootNext is only used inside of U-Boot and
* removed by efi bootmgr once BootNext is processed.
* So this BootNext can be volatile.
*/
efi_ret = efi_set_variable_int(u"BootNext", &efi_global_variable_guid,
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(u16), &iter->bootorder, false);
if (efi_ret != EFI_SUCCESS)
goto cleanup;
}
}
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);
if (efi_ret == EFI_SUCCESS)
cmd_ret = run_command(command, 0);
free(command);
}
#ifdef CONFIG_POSTBOOTMENU
run_command(CONFIG_POSTBOOTMENU, 0);
#endif
if (efi_ret != EFI_SUCCESS || cmd_ret != CMD_RET_SUCCESS)
ret = BOOTMENU_RET_FAIL;
return ret;
}
#ifdef CONFIG_AUTOBOOT_MENU_SHOW
int menu_show(int bootdelay)
{
int ret;
while (1) {
ret = bootmenu_show(bootdelay);
bootdelay = -1;
if (ret == BOOTMENU_RET_UPDATED)
continue;
if (IS_ENABLED(CONFIG_BOOTMENU_DISABLE_UBOOT_CONSOLE)) {
if (ret == BOOTMENU_RET_QUIT) {
/* default boot process */
if (IS_ENABLED(CONFIG_CMD_BOOTEFI_BOOTMGR))
run_command("bootefi bootmgr", 0);
run_command("run bootcmd", 0);
}
} else {
break;
}
}
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"
);