X/tp_alert.sh

   1 #!/bin/bash
   2 #
   3 # Stefan Huber <shuber2@gmail.com>
   4 #
   5 # ChangeLog:
   6 #   * 2009-07-24: Initial version
   7 #   * 2010-10-09: Use more shell commands
   8
   9
  10 # Wait this amount of time until we activate lock
  11 INITWAIT="0"
  12 # Wait this amount of time after an alert call
  13 ALERTPOSTWAIT="2"
  14 # Busy wait for polling position sensor
  15 BUSYWAIT="0.2"
  16 # Tolerance for sensor differences
  17 TOLERANCE="5"
  18 # Position file
  19 POSFILE="/sys/devices/platform/hdaps/position"
  20
  21
  22 #Set the paths
  23 export PATH="/bin:/usr/bin"
  24 export DISPLAY=":0"
  25
  26 state=0
  27 alert() {
  28         amixer -q sset Master 100%,100% unmute
  29         echo "Alert $state at time `date`"
  30
  31         case $state in
  32                 0)
  33                         echo "Leave me alone!" | festival --tts
  34                         state=1
  35                         ;;
  36                 1)
  37                         echo "E-mail sent!" | festival --tts
  38                         sendemail
  39                         state=2
  40                         ;;
  41                 *)
  42                         sendemail
  43                         while isActive; do
  44                                 echo "HELP!" | festival --tts
  45                         done
  46                         return
  47                         ;;
  48         esac
  49         sleep $ALERTPOSTWAIT
  50 }
  51
  52 sendemail() {
  53         /usr/sbin/sendmail $USER <<EOF
  54 Subject: tp_alert.sh alarm on `hostname`
  55 From: shuber@`hostname`
  56 To: shuber@`hostname`
  57
  58 This is an automatic mail from the tp_alert.sh script:
  59   state=$state
  60   time=`date`
  61 EOF
  62 }
  63
  64 isActive() {
  65         if "`qdbus org.freedesktop.ScreenSaver /ScreenSaver GetActive`" \
  66                 = "true"; then
  67                 return 0
  68         fi
  69         return 1
  70 }
  71
  72 getPosition() {
  73         pos=`cat $POSFILE`
  74         xtilt=${pos%,*}
  75         xtilt=${xtilt#(}
  76         ytilt=${pos#*,}
  77         ytilt=${ytilt%)}
  78 }
  79
  80
  81
  82
  83 if [ ! -e $POSFILE ]; then
  84         echo "HDAPS position file not existing!"
  85         return -1
  86 fi
  87
  88
  89 echo "Launched at time `date`"
  90 #Initial wait
  91 sleep $INITWAIT
  92
  93
  94
  95 #Wait for trigger to activate alertion system
  96 while ! isActive; do
  97         sleep $BUSYWAIT
  98 done
  99
 100
 101 echo "Activated."
 102 echo "Activated." | festival --tts
 103
 104
 105 #Get initial positions
 106 getPosition
 107 initxtilt=$xtilt
 108 initytilt=$ytilt
 109
 110 #Now wait until alertion system is deactivated
 111 while isActive; do
 112         getPosition
 113         diffx=`echo "$xtilt-$initxtilt" | bc`
 114         diffy=`echo "$ytilt-$initytilt" | bc`
 115         diffx=${diffx#-}
 116         diffy=${diffy#-}
 117
 118         if [[ $diffx -ge $TOLERANCE || $diffy -ge $TOLERANCE ]]; then
 119                 alert
 120         fi
 121         sleep $BUSYWAIT
 122 done
 123
 124 echo "Unlocked at time `date`."
 125 echo "Unlocked with state $state." | festival --tts
 126