86 lines
2.0 KiB
Bash
86 lines
2.0 KiB
Bash
#!/bin/sh
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# Copyright (C) 2006-2010 OpenWrt.org
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# Copyright (C) 2010 Vertical Communications
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fs_wait_for_key () {
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local timeout=$3
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local timer
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local do_failsafe
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local keypress_true="$(mktemp)"
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local keypress_wait="$(mktemp)"
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local keypress_sec="$(mktemp)"
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if [ -z "$keypress_wait" ]; then
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keypress_wait=/tmp/.keypress_wait
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touch $keypress_wait
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fi
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if [ -z "$keypress_true" ]; then
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keypress_true=/tmp/.keypress_true
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touch $keypress_true
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fi
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if [ -z "$keypress_sec" ]; then
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keypress_sec=/tmp/.keypress_sec
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touch $keypress_sec
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fi
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trap "echo 'true' >$keypress_true; lock -u $keypress_wait ; rm -f $keypress_wait" INT
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trap "echo 'true' >$keypress_true; lock -u $keypress_wait ; rm -f $keypress_wait" USR1
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[ -n "$timeout" ] || timeout=1
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[ $timeout -ge 1 ] || timeout=1
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timer=$timeout
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lock $keypress_wait
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{
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while [ $timer -gt 0 ]; do
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echo "$timer" >$keypress_sec
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timer=$(($timer - 1))
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sleep 1
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done
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lock -u $keypress_wait
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rm -f $keypress_wait
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} &
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echo "Press the [$1] key and hit [enter] $2"
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# if we're on the console we wait for input
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{
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while [ -r $keypress_wait ]; do
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timer="$(cat $keypress_sec)"
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[ -n "$timer" ] || timer=1
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timer="${timer%%\ *}"
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[ $timer -ge 1 ] || timer=1
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do_failsafe=""
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{
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read -t "$timer" do_failsafe
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if [ "$do_failsafe" = "$1" ]; then
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echo "true" >$keypress_true
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lock -u $keypress_wait
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rm -f $keypress_wait
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fi
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}
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done
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}
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lock -w $keypress_wait
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trap - INT
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trap - USR1
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keypressed=1
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[ "$(cat $keypress_true)" = "true" ] && keypressed=0
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rm -f $keypress_true
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rm -f $keypress_wait
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rm -f $keypress_sec
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return $keypressed
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}
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failsafe_wait() {
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FAILSAFE=
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pi_failsafe_net_message=true
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preinit_net_echo "Please press button now to enter failsafe"
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pi_failsafe_net_message=false
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fs_wait_for_key f 'to enter failsafe mode' $fs_failsafe_wait_timeout && FAILSAFE=true && export FAILSAFE
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}
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boot_hook_add preinit_main failsafe_wait
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