.

.

.

common/autoboot.c

void autoboot_command(const char *s)
{
        debug("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");

        if (stored_bootdelay != -1 && s && !abortboot(stored_bootdelay)) {
#if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC)
                int prev = disable_ctrlc(1);    /* disable Control C checking */
#endif

                run_command_list(s, -1, 0);

#if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC)
                disable_ctrlc(prev);    /* restore Control C checking */
#endif
        }

#ifdef CONFIG_MENUKEY
        if (menukey == CONFIG_MENUKEY) {
                s = getenv("menucmd");
                if (s)
                        run_command_list(s, -1, 0);
        }
#endif /* CONFIG_MENUKEY */
}

.

.

.