debian/apt.cron.daily

   1 #!/bin/sh
   2 #
   3
   4 #set -e
   5
   6 check_stamp()
   7 {
   8     stamp="$1"
   9     interval="$2"
  10
  11     if [ ! -f $stamp ]; then
  12         return 0
  13     fi
  14
  15     # compare midnight today to midnight the day the stamp was updated
  16     stamp=$(date --date=$(date -r $stamp --iso-8601) +%s)
  17     now=$(date --date=$(date --iso-8601) +%s)
  18     delta=$(($now-$stamp))
  19     echo "stamp=$stamp, now=$now, delta=$delta"
  20
  21     if [ $delta -ge $interval ]; then
  22         return 0
  23     fi
  24
  25     return 1
  26 }
  27
  28 update_stamp()
  29 {
  30     stamp="$1"
  31
  32     touch $stamp
  33 }
  34
  35 UpdateInterval=0
  36 DownloadUpgradeableInterval=0
  37 RES=`apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages`
  38 eval $RES
  39
  40 # laptop check, on_ac_power returns:
  41 #       0 (true)    System is on mains power
  42 #       1 (false)   System is not on mains power
  43 #       255 (false) Power status could not be determined
  44 # Desktop systems always return 255 it seems
  45 if which on_ac_power >/dev/null; then
  46     on_ac_power
  47     if [ $? -eq 1 ]; then
  48         exit 0
  49     fi
  50 fi
  51
  52 UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
  53 if check_stamp $UPDATE_STAMP $UpdateInterval; then
  54     if apt-get -qq update 2>/dev/null; then
  55         if which dbus-send >/dev/null; then
  56             dbus-send --system / app.apt.dbus.updated boolean:true
  57         fi
  58         update_stamp $UPDATE_STAMP
  59     fi
  60 fi
  61
  62 DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
  63 if check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
  64     apt-get -qq -d dist-upgrade 2>/dev/null
  65     update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
  66 fi