package/base-files/files/lib/preinit/30_failsafe_wait

   1 # Copyright (C) 2006-2010 OpenWrt.org
   2 # Copyright (C) 2010 Vertical Communications
   3
   4 fs_wait_for_key () {
   5         local timeout=$3
   6         local timer
   7         local do_keypress
   8         local keypress_true="$(mktemp)"
   9         local keypress_wait="$(mktemp)"
  10         local keypress_sec="$(mktemp)"
  11         if [ -z "$keypress_wait" ]; then
  12                 keypress_wait=/tmp/.keypress_wait
  13                 touch $keypress_wait
  14         fi
  15         if [ -z "$keypress_true" ]; then
  16                 keypress_true=/tmp/.keypress_true
  17                 touch $keypress_true
  18         fi
  19         if [ -z "$keypress_sec" ]; then
  20                 keypress_sec=/tmp/.keypress_sec
  21                 touch $keypress_sec
  22         fi
  23
  24         trap "echo 'true' >$keypress_true; lock -u $keypress_wait ; rm -f $keypress_wait" INT
  25         trap "echo 'true' >$keypress_true; lock -u $keypress_wait ; rm -f $keypress_wait" USR1
  26
  27         [ -n "$timeout" ] || timeout=1
  28         [ $timeout -ge 1 ] || timeout=1
  29         timer=$timeout
  30         lock $keypress_wait
  31         {
  32                 while [ $timer -gt 0 ]; do
  33                         pi_failsafe_net_message=true \
  34                                 preinit_net_echo "Please press button now to enter failsafe"
  35                         echo "$timer" >$keypress_sec
  36                         timer=$(($timer - 1))
  37                         sleep 1
  38                 done
  39                 lock -u $keypress_wait
  40                 rm -f $keypress_wait
  41         } &
  42
  43         local consoles="$(sed -e 's/ /\n/g' /proc/cmdline | grep '^console=' | sed -e 's/^console=//' -e 's/,.*//')"
  44         [ -n "$consoles" ] || consoles=console
  45         for console in $consoles; do
  46                 [ -c "/dev/$console" ] || continue
  47                 [ "$pi_preinit_no_failsafe" != "y" ] && echo "Press the [$1] key and hit [enter] $2" > "/dev/$console"
  48                 echo "Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level" > "/dev/$console"
  49                 {
  50                         while [ -r $keypress_wait ]; do
  51                                 timer="$(cat $keypress_sec)"
  52
  53                                 [ -n "$timer" ] || timer=1
  54                                 timer="${timer%%\ *}"
  55                                 [ $timer -ge 1 ] || timer=1
  56                                 do_keypress=""
  57                                 {
  58                                         read -t "$timer" do_keypress < "/dev/$console"
  59                                         case "$do_keypress" in
  60                                         $1)
  61                                                 echo "true" >$keypress_true
  62                                                 ;;
  63                                         1 | 2 | 3 | 4)
  64                                                 echo "$do_keypress" >/tmp/debug_level
  65                                                 ;;
  66                                         *)
  67                                                 continue;
  68                                                 ;;
  69                                         esac
  70                                         lock -u $keypress_wait
  71                                         rm -f $keypress_wait
  72                                 }
  73                         done
  74                 } &
  75         done
  76         lock -w $keypress_wait
  77
  78         keypressed=1
  79         [ "$(cat $keypress_true)" = "true" ] && keypressed=0
  80
  81         rm -f $keypress_true
  82         rm -f $keypress_wait
  83         rm -f $keypress_sec
  84
  85         return $keypressed
  86 }
  87
  88 failsafe_wait() {
  89         FAILSAFE=
  90         [ "$pi_preinit_no_failsafe" = "y" ] && {
  91                 fs_wait_for_key "" "" $fs_failsafe_wait_timeout
  92                 return
  93         }
  94         grep -q 'failsafe=' /proc/cmdline && FAILSAFE=true && export FAILSAFE
  95         if [ "$FAILSAFE" != "true" ]; then
  96                 fs_wait_for_key f 'to enter failsafe mode' $fs_failsafe_wait_timeout && FAILSAFE=true
  97                 [ -f "/tmp/failsafe_button" ] && FAILSAFE=true && echo "- failsafe button "$(cat /tmp/failsafe_button)" was pressed -"
  98                 [ "$FAILSAFE" = "true" ] && export FAILSAFE && touch /tmp/failsafe
  99         fi
 100 }
 101
 102 boot_hook_add preinit_main failsafe_wait