[base-files] make basefiles aware of procd
[openwrt/svn-archive/archive.git] / package / base-files / files / lib / preinit / 30_failsafe_wait
1 #!/bin/sh
2 # Copyright (C) 2006-2010 OpenWrt.org
3 # Copyright (C) 2010 Vertical Communications
4
5 fs_wait_for_key () {
6 local timeout=$3
7 local timer
8 local do_failsafe
9 local keypress_true="$(mktemp)"
10 local keypress_wait="$(mktemp)"
11 local keypress_sec="$(mktemp)"
12 if [ -z "$keypress_wait" ]; then
13 keypress_wait=/tmp/.keypress_wait
14 touch $keypress_wait
15 fi
16 if [ -z "$keypress_true" ]; then
17 keypress_true=/tmp/.keypress_true
18 touch $keypress_true
19 fi
20 if [ -z "$keypress_sec" ]; then
21 keypress_sec=/tmp/.keypress_sec
22 touch $keypress_sec
23 fi
24
25 trap "echo 'true' >$keypress_true; lock -u $keypress_wait ; rm -f $keypress_wait" INT
26 trap "echo 'true' >$keypress_true; lock -u $keypress_wait ; rm -f $keypress_wait" USR1
27
28 [ -n "$timeout" ] || timeout=1
29 [ $timeout -ge 1 ] || timeout=1
30 timer=$timeout
31 lock $keypress_wait
32 {
33 while [ $timer -gt 0 ]; do
34 echo "$timer" >$keypress_sec
35 timer=$(($timer - 1))
36 sleep 1
37 done
38 lock -u $keypress_wait
39 rm -f $keypress_wait
40 } &
41
42 echo "Press the [$1] key and hit [enter] $2"
43 # if we're on the console we wait for input
44 {
45 while [ -r $keypress_wait ]; do
46 timer="$(cat $keypress_sec)"
47
48 [ -n "$timer" ] || timer=1
49 timer="${timer%%\ *}"
50 [ $timer -ge 1 ] || timer=1
51 do_failsafe=""
52 {
53 read -t "$timer" do_failsafe
54 if [ "$do_failsafe" = "$1" ]; then
55 echo "true" >$keypress_true
56 lock -u $keypress_wait
57 rm -f $keypress_wait
58 fi
59 }
60 done
61 }
62 lock -w $keypress_wait
63
64 keypressed=1
65 [ "$(cat $keypress_true)" = "true" ] && keypressed=0
66 [ -f "/tmp/failsafe_button" ] && keypressed=1
67
68 rm -f $keypress_true
69 rm -f $keypress_wait
70 rm -f $keypress_sec
71
72 return $keypressed
73 }
74
75 failsafe_wait() {
76 FAILSAFE=
77 pi_failsafe_net_message=true
78 preinit_net_echo "Please press button now to enter failsafe"
79 pi_failsafe_net_message=false
80 fs_wait_for_key f 'to enter failsafe mode' $fs_failsafe_wait_timeout && FAILSAFE=true && export FAILSAFE
81 }
82
83 boot_hook_add preinit_main failsafe_wait
84