debian/apt.cron.daily

   1 #!/bin/sh
   2 #
   3 # cron job for apt-get update
   4 #
   5 # Update-Package-Intervall is in days
   6 #
   7 STAMP=/var/lib/apt/update-stamp
   8
   9 #set -e
  10
  11 do_update()
  12 {
  13     touch $STAMP.new
  14     if apt-get update -qq; then
  15         if [ -x /usr/bin/dbus-send ]; then
  16             dbus-send --system / app.apt.dbus.updated boolean:true
  17         fi
  18         mv $STAMP.new $STAMP
  19     fi
  20     rm -f $STAMP.new
  21 }
  22
  23 UpdateInterval=0
  24 RES=`apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists`
  25 eval $RES
  26
  27 if [ $UpdateInterval -eq 0 ]; then
  28     exit 0
  29 fi
  30
  31 # laptop check, on_ac_power returns:
  32 #       0 (true)    System is on mains power
  33 #       1 (false)   System is not on mains power
  34 #       255 (false) Power status could not be determined
  35 # Desktop systems always return 255 it seems
  36 if [ -x /usr/bin/on_ac_power ]; then
  37     /usr/bin/on_ac_power
  38     if [ $? -eq 1 ]; then
  39         exit 0
  40     fi
  41 fi
  42
  43 if [ ! -f $STAMP ]; then
  44     do_update
  45     exit 0
  46 fi
  47
  48 LastUpdate=`stat -c "%Y" $STAMP 2>/dev/null`
  49 Now=`date +%s`
  50
  51 NeedUpdate=$(($LastUpdate+$UpdateInterval*3600*24))
  52 if [ $NeedUpdate -le $Now ]; then
  53     do_update
  54 fi