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#!/bin/sh
# Copyright (C) 2006-2010 OpenWrt.org
# Copyright (C) 2010 Vertical Communications
fs_wait_for_key () {
local timeout=$3
local timer
local do_failsafe
local keypress_true="$(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
} &
echo "Press the [$1] key and hit [enter] $2"
# 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%%\ *}"
[ $timer -ge 1 ] || timer=1
do_failsafe=""
{
read -t "$timer" do_failsafe
if [ "$do_failsafe" = "$1" ]; then
echo "true" >$keypress_true
lock -u $keypress_wait
rm -f $keypress_wait
fi
}
done
}
lock -w $keypress_wait
trap - INT
trap - USR1
keypressed=1
[ "$(cat $keypress_true)" = "true" ] && keypressed=0
rm -f $keypress_true
rm -f $keypress_wait
rm -f $keypress_sec
return $keypressed
}
failsafe_wait() {
FAILSAFE=
pi_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 && export FAILSAFE
}
boot_hook_add preinit_main failsafe_wait
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