#!/bin/sh
#
-# cron job for apt-get update
+
+#set -e
+#
+# This file understands the following apt configuration variables:
#
-# Update-Package-Intervall is in days
+# "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)
#
-STAMP=/var/lib/apt/update-stamp
+# "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.
+#
-#set -e
+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))
-do_update()
+ # 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()
{
- touch $STAMP.new
- if apt-get update -qq; then
- if [ -x /usr/bin/dbus-send ]; then
- dbus-send --system / app.apt.dbus.updated boolean:true
- fi
- mv $STAMP.new $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
- rm -f $STAMP.new
}
+
UpdateInterval=0
-RES=`apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists`
-eval $RES
+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::AutocleanInterval)
+
+UnattendedUpgradeInterval=0
+eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade)
-if [ $UpdateInterval -eq 0 ]; then
- exit 0
-fi
# 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 [ -x /usr/bin/on_ac_power ]; then
- /usr/bin/on_ac_power
+if which on_ac_power >/dev/null; then
+ on_ac_power
if [ $? -eq 1 ]; then
exit 0
fi
fi
-if [ ! -f $STAMP ]; then
- do_update
- exit 0
+# check if we can lock the cache and if the cache is clean
+if ! apt-get check -q -q 2>/dev/null; then
+ echo "$0: could not lock the APT cache"
+ exit 1
fi
-LastUpdate=`stat -c "%Y" $STAMP 2>/dev/null`
-Now=`date +%s`
-NeedUpdate=$(($LastUpdate+$UpdateInterval*3600*24))
-if [ $NeedUpdate -le $Now ]; then
- do_update
+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
+
+UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
+if check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then
+ unattended-upgrade
+ update_stamp $UPGRADE_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
+
+# check cache size
+check_size_constraints
projects / apt.git / blobdiff