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