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 $keypress_wait
  41         } &
  42
  43         [ "$pi_preinit_no_failsafe" != "y" ] && echo "Press the [$1] key and hit [enter] $2"
  44         echo "Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level"
  45         # if we're on the console we wait for input
  46         {
  47                 while [ -r $keypress_wait ]; do
  48                         timer="$(cat $keypress_sec)"
  49
  50                         [ -n "$timer" ] || timer=1
  51                         timer="${timer%%\ *}"
  52                         [ $timer -ge 1 ] || timer=1
  53                         do_keypress=""
  54                         {
  55                                 read -t "$timer" do_keypress
  56                                 case "$do_keypress" in
  57                                 $1)
  58                                         echo "true" >$keypress_true
  59                                         ;;
  60                                 1 | 2 | 3 | 4)
  61                                         echo "$do_keypress" >/tmp/debug_level
  62                                         ;;
  63                                 *)
  64                                         continue;
  65                                         ;;
  66                                 esac
  67                                 lock -u $keypress_wait
  68                                 rm -f $keypress_wait
  69                         }
  70                 done
  71         }
  72         lock -w $keypress_wait
  73
  74         keypressed=1
  75         [ "$(cat $keypress_true)" = "true" ] && keypressed=0
  76
  77         rm -f $keypress_true
  78         rm -f $keypress_wait
  79         rm -f $keypress_sec
  80
  81         return $keypressed
  82 }
  83
  84 failsafe_wait() {
  85         FAILSAFE=
  86         [ "$pi_preinit_no_failsafe" = "y" ] && {
  87                 fs_wait_for_key "" "" $fs_failsafe_wait_timeout
  88                 return
  89         }
  90         grep -q 'failsafe=' /proc/cmdline && FAILSAFE=true && export FAILSAFE
  91         if [ "$FAILSAFE" != "true" ]; then
  92                 fs_wait_for_key f 'to enter failsafe mode' $fs_failsafe_wait_timeout && FAILSAFE=true
  93                 [ -f "/tmp/failsafe_button" ] && FAILSAFE=true && echo "- failsafe button "$(cat /tmp/failsafe_button)" was pressed -"
  94                 [ "$FAILSAFE" = "true" ] && export FAILSAFE && touch /tmp/failsafe
  95         fi
  96 }
  97
  98 boot_hook_add preinit_main failsafe_wait