sh /etc/rc.button/wps

if grep WPS /sys/kernel/debug/gpio | grep "in  lo" > /dev/null; then
  ACTION="pressed"
elif grep WPS /sys/kernel/debug/gpio | grep "in  hi" > /dev/null; then
  ACTION="released"
else
  ACTION="fail"
fi

make image PROFILE="archer-c7-v5" PACKAGES="-failsafe ..."

[    5.990354] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Press the [f] key and hit [enter] to enter failsafe mode
Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level
[    7.004199] eth0: link up (1000Mbps/Full duplex)
[    7.009182] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
- failsafe button wps was pressed -
- failsafe -

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

fs_wait_for_key () {
    local timeout=$3
    local timer
    local do_keypress
    local keypress_true="$(mktemp)"
    local keypress_wait="$(mktemp)"
    local keypress_sec="$(mktemp)"
    if [ -z "$keypress_wait" ]; then
        keypress_wait=/tmp/.keypress_wait
        touch $keypress_wait
    fi
    if [ -z "$keypress_true" ]; then
        keypress_true=/tmp/.keypress_true
        touch $keypress_true
    fi
    if [ -z "$keypress_sec" ]; then
        keypress_sec=/tmp/.keypress_sec
        touch $keypress_sec
    fi

    trap "echo 'true' >$keypress_true; lock -u $keypress_wait ; rm -f $keypress_wait" INT
    trap "echo 'true' >$keypress_true; lock -u $keypress_wait ; rm -f $keypress_wait" USR1

    [ -n "$timeout" ] || timeout=1
    [ $timeout -ge 1 ] || timeout=1
    timer=$timeout
    lock $keypress_wait
    {
        while [ $timer -gt 0 ]; do
            echo "$timer" >$keypress_sec
            timer=$(($timer - 1))
            sleep 1
        done
        lock -u $keypress_wait
        rm -f $keypress_wait
    } &

    [ "$pi_preinit_no_failsafe" != "y" ] && echo "Press the [$1] key and hit [enter] $2"
    echo "Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level"
    # if we're on the console we wait for input
    {
        while [ -r $keypress_wait ]; do
            timer="$(cat $keypress_sec)"

            [ -n "$timer" ] || timer=1
            timer="${timer%%\ *}"
            [ $timer -ge 1 ] || timer=1
            do_keypress=""
            {
                read -t "$timer" do_keypress
                case "$do_keypress" in
                $1)
                    echo "true" >$keypress_true
                    ;;
                1 | 2 | 3 | 4)
                    echo "$do_keypress" >/tmp/debug_level
                    ;;
                *)
                    continue;
                    ;;
                esac
                lock -u $keypress_wait
                rm -f $keypress_wait
            }
        done
    }
    lock -w $keypress_wait

    keypressed=1
    [ "$(cat $keypress_true)" = "true" ] && keypressed=0

    rm -f $keypress_true
    rm -f $keypress_wait
    rm -f $keypress_sec

    return $keypressed
}

failsafe_wait() {
    FAILSAFE=
    [ "$pi_preinit_no_failsafe" == "y" ] && {
        fs_wait_for_key "" "" $fs_failsafe_wait_timeout
        return
    }
    grep -q 'failsafe=' /proc/cmdline && FAILSAFE=true && export FAILSAFE
    if [ "$FAILSAFE" != "true" ]; then
        pi_failsafe_net_message=true
        preinit_net_echo "Please press button now to enter failsafe"
        pi_failsafe_net_message=false
        fs_wait_for_key f 'to enter failsafe mode' $fs_failsafe_wait_timeout && FAILSAFE=true
        [ -f "/tmp/failsafe_button" ] && FAILSAFE=true && echo "- failsafe button "`cat /tmp/failsafe_button`" was pressed -"
        [ "$FAILSAFE" = "true" ] && export FAILSAFE && touch /tmp/failsafe
    fi
}

boot_hook_add preinit_main failsafe_wait

 580: # CONFIG_TARGET_PREINIT_DISABLE_FAILSAFE is not set
 583: # CONFIG_TARGET_PREINIT_SUPPRESS_FAILSAFE_NETMSG is not set
3055: # CONFIG_PACKAGE_luci-mod-failsafe is not set

make image PROFILE="tl-mr3420-v2" FILES="files/tl-mr3420-v2/" PACKAGES="..."
make image PROFILE="archer-c7-v5" FILES="files/archer-c7-v5/" PACKAGES="..."

nano ./package/base-files/files/etc/rc.button/failsafe

#!/bin/sh

if [ "$BUTTON" = "reset" ]; then
  [ "${TYPE}" = "switch" ] || echo ${BUTTON} > /tmp/failsafe_button

fi

return 0

make image PROFILE="tl-mr3420-v2" FILES="files/" PACKAGES="..."
WARNING: your configuration is out of sync. Please run make menuconfig, oldconfig or defconfig!
 make[1] image
make -r image: build failed. Please re-run make with -j1 V=s to see what's going on
~/openwrt/include/toplevel.mk:205: polecenia dla obiektu 'image' nie powiodły się
make: *** [image] Błąd 1