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- #!/bin/sh
- #
-
- #set -e
- #
- # This file understands the following apt configuration variables:
- #
- # "APT::Periodic::Update-Package-Lists=1"
- # - Do "apt-get update" automatically every n-days (0=disable)
- #
- # "APT::Periodic::Download-Upgradeable-Packages=0",
- # - Do "apt-get upgrade --download-only" every n-days (0=disable)
- #
- # "APT::Periodic::AutocleanInterval"
- # - Do "apt-get autoclean" every n-days (0=disable)
- #
- # "APT::Periodic::Unattended-Upgrade"
- # - Run the "unattended-upgrade" security upgrade script
- # every n-days (0=disabled)
- # Requires the package "unattended-upgrades" and will write
- # a log in /var/log/unattended-upgrades
- #
- # "APT::Archives::MaxAge",
- # - Set maximum allowed age of a cache package file. If a cache
- # package file is older it is deleted (0=disable)
- #
- # "APT::Archives::MaxSize",
- # - Set maximum size of the cache in MB (0=disable). If the cache
- # is bigger, cached package files are deleted until the size
- # requirement is met (the biggest packages will be deleted
- # first).
- #
- # "APT::Archives::MinAge"
- # - Set minimum age of a package file. If a file is younger it
- # will not be deleted (0=disable). Usefull to prevent races
- # and to keep backups of the packages for emergency.
- #
-
- check_stamp()
- {
- stamp="$1"
- interval="$2"
-
- if [ $interval -eq 0 ]; then
- return 1
- fi
-
- if [ ! -f $stamp ]; then
- return 0
- fi
-
- # compare midnight today to midnight the day the stamp was updated
- stamp=$(date --date=$(date -r $stamp --iso-8601) +%s)
- now=$(date --date=$(date --iso-8601) +%s)
- delta=$(($now-$stamp))
-
- # intervall is in days,
- interval=$(($interval*60*60*24))
- #echo "stampfile: $1"
- #echo "interval=$interval, now=$now, stamp=$stamp, delta=$delta"
-
- if [ $delta -ge $interval ]; then
- return 0
- fi
-
- return 1
- }
-
- update_stamp()
- {
- stamp="$1"
-
- touch $stamp
- }
-
-
-
- # we check here if autoclean was enough sizewise
- check_size_constraints()
- {
- # min-age in days
- MaxAge=0
- MinAge=2
- MaxSize=0
- CacheDir="var/cache/apt"
- CacheArchive="archives/"
- eval $(apt-config shell MaxAge APT::Archives::MaxAge)
- eval $(apt-config shell MinAge APT::Archives::MinAge)
- eval $(apt-config shell MaxSize APT::Archives::MaxSize)
- eval $(apt-config shell Dir Dir)
- eval $(apt-config shell CacheDir Dir::Cache)
- eval $(apt-config shell CacheArchive Dir::Cache::archives)
-
- # sanity check
- if [ -z "$CacheDir" -o -z "$CacheArchive" ]; then
- echo "empty Dir::Cache or Dir::Cache::archives, exiting"
- exit
- fi
-
- Cache="${Dir%/}/${CacheDir%/}/${CacheArchive%/}/"
-
- # check age
- if [ ! $MaxAge -eq 0 ] && [ ! $MinAge -eq 0 ]; then
- find $Cache -name "*.deb" \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 | xargs -r -0 rm -f
- elif [ ! $MaxAge -eq 0 ]; then
- find $Cache -name "*.deb" -ctime +$MaxAge -and -mtime +$MaxAge -print0 | xargs -r -0 rm -f
- fi
-
- # check size
- if [ ! $MaxSize -eq 0 ]; then
- # maxSize is in MB
- MaxSize=$(($MaxSize*1024))
-
- #get current time
- now=$(date --date=$(date --iso-8601) +%s)
- MinAge=$(($MinAge*24*60*60))
-
- # reverse-sort by mtime
- for file in $(ls -rt $Cache/*.deb 2>/dev/null); do
- du=$(du -s $Cache)
- size=${du%%/*}
- # check if the cache is small enough
- if [ $size -lt $MaxSize ]; then
- break
- fi
-
- # check for MinAge of the file
- if [ ! $MinAge -eq 0 ]; then
- # check both ctime and mtime
- mtime=$(stat -c %Y $file)
- ctime=$(stat -c %Z $file)
- if [ $mtime -gt $ctime ]; then
- delta=$(($now-$mtime))
- else
- delta=$(($now-$ctime))
- fi
- #echo "$file ($delta), $MinAge"
- if [ $delta -le $MinAge ]; then
- #echo "Skiping $file (delta=$delta)"
- break
- fi
- fi
-
- # delete oldest file
- rm -f $file
- done
- fi
- }
-
-
- UpdateInterval=0
- DownloadUpgradeableInterval=0
- eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
- AutocleanInterval=$DownloadUpgradeableInterval
- eval $(apt-config shell AutocleanInterval APT::Periodic::Autoclean)
-
- UnattendedUpgradeInterval=0
- eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade)
-
-
- # laptop check, on_ac_power returns:
- # 0 (true) System is on mains power
- # 1 (false) System is not on mains power
- # 255 (false) Power status could not be determined
- # Desktop systems always return 255 it seems
- if which on_ac_power >/dev/null; then
- on_ac_power
- if [ $? -eq 1 ]; then
- exit 0
- fi
- fi
-
- UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
- if check_stamp $UPDATE_STAMP $UpdateInterval; then
- if apt-get -qq update 2>/dev/null; then
- if which dbus-send >/dev/null; then
- dbus-send --system / app.apt.dbus.updated boolean:true
- fi
- update_stamp $UPDATE_STAMP
- fi
- fi
-
- DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
- if check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
- apt-get -qq -d dist-upgrade 2>/dev/null
- update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
- fi
-
- AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
- if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
- apt-get -qq autoclean
- update_stamp $AUTOCLEAN_STAMP
- fi
-
- UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
- if check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then
- unattended-upgrade
- update_stamp $UPGRADE_STAMP
- fi
-
- # check cache size
- check_size_constraints
-