openwrtv4/target/linux/x86/base-files/lib/preinit/45_failsafe_x86

#!/bin/sh
# Copyright (C) 2006-2010 OpenWrt.org
# Copyright (C) 2010 Vertical Communications

failsafe_wait() {
    FAILSAFE=
    grep -q 'failsafe=' /proc/cmdline && FAILSAFE=true && export FAILSAFE
    if [ "$FAILSAFE" != "true" ]; then
        preinit_net_echo "Please press button now to enter failsafe"
        echo -n "Press "
        fs_wait_for_key f 'to enter failsafe mode' $fs_failsafe_wait_timeout && FAILSAFE=true && export FAILSAFE
    fi
}