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
  24     if [ $delta -ge $interval ]; then
  25         return 0
  26     fi
  27
  28     return 1
  29 }
  30
  31 update_stamp()
  32 {
  33     stamp="$1"
  34
  35     touch $stamp
  36 }
  37
  38
  39
  40 # we check here if autoclean was enough sizewise
  41 check_size_constraints()
  42 {
  43     # min-age in days
  44     MaxAge=0
  45     MaxSize=0
  46     CacheDir="var/cache/apt"
  47     CacheArchive="archives/"
  48     eval $(apt-config shell MaxAge APT::Archives::MaxAge)
  49     eval $(apt-config shell MaxSize APT::Archives::MaxSize)
  50     eval $(apt-config shell CacheDir Dir::Cache)
  51     eval $(apt-config shell CacheArchive Dir::Cache::archives)
  52
  53     # sanity check
  54     if [ -z "$CacheDir" -o -z "$CacheArchive" ]; then
  55         echo "empty Dir::Cache or Dir::Cache::archives, exiting"
  56         exit
  57     fi
  58     Cache="/"$CacheDir$CacheArchive
  59
  60     # check age
  61     if [ ! $MaxAge -eq 0 ]; then
  62         find $Cache -name "*.deb"  -mtime +$MaxAge -print0 | xargs -r -0 rm -f
  63     fi
  64
  65     # check size
  66     if [ ! $MaxSize -eq 0 ]; then
  67         # reverse-sort by mtime
  68         for file in $(ls -rt $Cache/*.deb); do
  69             du=$(du -s $Cache)
  70             size=${du%%/*}
  71             # check if the cache is small enough
  72             if [ $size -lt $MaxSize ]; then
  73                 break
  74             fi
  75             # delete oldest file
  76             rm -f $file
  77         done
  78     fi
  79 }
  80
  81 check_size_constraints
  82
  83 UpdateInterval=0
  84 DownloadUpgradeableInterval=0
  85 eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
  86 AutocleanInterval=$DownloadUpgradeableInterval
  87 eval $(apt-config shell AutocleanInterval APT::Periodic::Autoclean)
  88
  89 # laptop check, on_ac_power returns:
  90 #       0 (true)    System is on mains power
  91 #       1 (false)   System is not on mains power
  92 #       255 (false) Power status could not be determined
  93 # Desktop systems always return 255 it seems
  94 if which on_ac_power >/dev/null; then
  95     on_ac_power
  96     if [ $? -eq 1 ]; then
  97         exit 0
  98     fi
  99 fi
 100
 101 UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
 102 if check_stamp $UPDATE_STAMP $UpdateInterval; then
 103     if apt-get -qq update 2>/dev/null; then
 104         if which dbus-send >/dev/null; then
 105             dbus-send --system / app.apt.dbus.updated boolean:true
 106         fi
 107         update_stamp $UPDATE_STAMP
 108     fi
 109 fi
 110
 111 DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
 112 if check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
 113     apt-get -qq -d dist-upgrade 2>/dev/null
 114     update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
 115 fi
 116
 117 AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
 118 if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
 119     apt-get -qq autoclean
 120     check_size_contrains
 121     update_stamp $AUTOCLEAN_STAMP
 122 fi