bin/away-detect

   1 #!/bin/sh
   2 # $Id$
   3 # -*- sh -*- vim: ft=sh sw=4 sts=4
   4
   5 # Checks several sources of information and updates my away status
   6 # appropriately.  Designed to be periodically called by cron on marge.
   7
   8 PATH=/home/tpope/bin:/bin:/usr/bin
   9
  10 out="Out"
  11 sleeping="Sleeping"
  12 afk="Away from keyboard"
  13 off="Desktop is off"
  14
  15 old_away="`tpope away`"
  16 [ -f "$HOME/.away-smart" ] && . "$HOME/.away-smart"
  17 cat /dev/null > "$HOME/.away-smart"
  18
  19 ssh="ssh -a -x -oBatchmode=yes -oSetupTimeOut=20"
  20
  21 if [ -f "/tmp/LCK..`basename $0`" ]; then
  22     if [ -d "/tmp/LCK..`basename $0`" ]; then
  23         #echo "Locked.  Exiting." >&2
  24         exit 1
  25     else
  26         #echo "Stale lock file found.  Removing." >&2
  27         rm -f "/tmp/LCK..`basename $0`"
  28     fi
  29 fi
  30
  31 trap 'rm -f "/tmp/LCK..`basename $0`"' EXIT
  32 echo $$ > "/tmp/LCK..`basename $0`"
  33
  34 set_smart() {
  35     [ -z "$old_away" -o "$old_away" = "$old_smart" ] && \
  36     tpope away "$*"
  37     smart="$*"
  38 }
  39
  40 set_custom() {
  41     [ -z "$old_away" -o "$old_away" = "$old_smart" ] && \
  42     tpope away "$*"
  43 }
  44
  45 set_out() {
  46     # Away message is empty or older then our "smart" flag
  47     #[ -n "$old_away" -a "$HOME/.away" -nt "$HOME/.away-smart" ] || \
  48     [ -z "$old_away" -o "$old_away" = "$old_smart" ] && \
  49     tpope away "$*"
  50     set_smart "$*"
  51 }
  52
  53 set_in() {
  54     if [ "`date +%k`" -ge 2 -a "`date +%k`" -le 9 ]; then
  55         #[ -n "$old_away" -a "$HOME/.away" -nt "$HOME/.away-smart" ] || \
  56         set_smart "$sleeping"
  57     else
  58         set_smart "$*"
  59     fi
  60 }
  61
  62 set_active() {
  63     if [ -n "$old_smart" -a -n "$old_away" ]; then
  64         tpope away -c
  65         set_smart ""
  66     fi
  67     #[ -f "$HOME/.away-smart" ] && tpope away -c
  68 }
  69
  70 now="$(expr 60 \* $(date +%H) + $(date +%M))"
  71
  72 today|sed -e s/^..........//|grep '[0-9][0-9]:[0-9][0-9]-[0-9][0-9]:[0-9][0-9]'| \
  73 while read times event; do
  74     begin="$(expr 60 \* $(echo $times|sed -e 's/-.*//' -e 's/:/ + /g'))"
  75     end="$(expr 60 \* $(echo $times|sed -e 's/.*-//' -e 's/:/ + /g'))"
  76     max_end="$end"
  77     case "$event" in
  78         *[Cc]lass*) begin="`expr $begin - 10`"
  79             end="`expr $begin / 2 + $end / 2`"
  80         ;;
  81     esac
  82     if [ "$begin" -le "$now" -a "$now" -lt "$end" ]; then
  83         echo "scheduled=\"$event\"" > "$HOME/.away-smart"
  84         break
  85     elif [ "$old_away" = "$event" -a "$now" -gt "$max_end" ]; then
  86         echo "old_smart=\"$old_away\"" > "$HOME/.away-smart"
  87     fi
  88 done
  89
  90 [ -f "$HOME/.away-smart" ] && . "$HOME/.away-smart"
  91 old_sched="$scheduled"
  92
  93 for host in abe homer lisa mona; do
  94     ping -c 1 $host >/dev/null 2>&1 && livehosts="$livehosts $host"
  95 done
  96
  97 for host in $livehosts; do
  98     # True if a non-blanked display is found
  99     $ssh $host 'if DISPLAY=:0.0 xscreensaver-command -time >/dev/null 2>&1; then if DISPLAY=:0.0 xscreensaver-command -time 2>/dev/null|grep non-blanked >/dev/null; then true; else pid=`ps ax|grep "[0-9]:[0-9][0-9] ssh .*exec screen.*RR irc"|sed -e "s/^  *//"|cut -d" " -f 1`; [ -f "$HOME/.irc.lock" -o -z "$pid" ] || kill $pid; false; fi; else false; fi' && alive=$host
 100 done
 101
 102 if ! ping -c 1 mona >/dev/null 2>/dev/null; then
 103     phone=unknown
 104 else
 105     last_slh="`$ssh mona cat .blue/last_slh 2>/dev/null`"
 106     if [ -z "$last_slh" ]; then
 107         phone=unknown
 108     elif [ "$(expr "$(date +%s)" - "$last_slh")" -lt 600 ]; then
 109         phone=present
 110     else
 111         phone=absent
 112     fi
 113 fi
 114
 115 if [ -n "$scheduled" ]; then
 116     set_custom "$scheduled"
 117 elif [ -n "$alive" ]; then
 118     set_active
 119 elif [ "$phone" = unknown ]; then
 120     set_in "$afk"
 121 elif [ "$phone" = present ]; then
 122     set_in "$afk"
 123 else
 124     set_out "$out"
 125 fi
 126
 127 cat /dev/null > "$HOME/.away-smart"
 128 echo "old_smart=\"$smart\"" >>~/.away-smart
 129 echo "old_phone=\"$phone\"" >>~/.away-smart
 130 echo "old_alive=\"$alive\"" >>~/.away-smart
 131 echo "old_sched=\"${scheduled:-$old_sched}\"" >>~/.away-smart
 132
 133 exit 0