#!/bin/sh
+#set -e
#
-# cron job for apt-get update
+# This file understands the following apt configuration variables:
+# Values here are the default.
+# Create /etc/apt/apt.conf.d/02periodic file to set your preference.
#
-# Update-Package-Intervall is in days
+# Dir "/";
+# - RootDir for all configuration files
#
-STAMP=/var/lib/apt/update-stamp
-
-#set -e
+# Dir::Cache "var/apt/cache/";
+# - Set apt package cache directory
+#
+# Dir::Cache::Archive "archives/";
+# - Set package archive directory
+#
+# APT::Periodic::BackupArchiveInterval "0";
+# - Backup after n-days if archive contents changed.(0=disable)
+#
+# APT::Periodic::BackupLevel "3";
+# - Backup level.(0=disable), 1 is invalid.
+#
+# Dir::Cache::Backup "backup/";
+# - Set periodic package backup directory
+#
+# APT::Archives::MaxAge "0"; (old, deprecated)
+# APT::Periodic::MaxAge "0"; (new)
+# - Set maximum allowed age of a cache package file. If a cache
+# package file is older it is deleted (0=disable)
+#
+# APT::Archives::MinAge "2"; (old, deprecated)
+# APT::Periodic::MinAge "2"; (new)
+# - 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.
+#
+# APT::Archives::MaxSize "0"; (old, deprecated)
+# APT::Periodic::MaxSize "0"; (new)
+# - 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::Periodic::Update-Package-Lists "0";
+# - 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::Unattended-Upgrade "0";
+# - 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::Periodic::AutocleanInterval "0";
+# - Do "apt-get autoclean" every n-days (0=disable)
+#
+# APT::Periodic::Verbose "0";
+# - Send report mail to root
+# 0: no report (or null string)
+# 1: progress report (actually any string)
+# 2: + command outputs (remove -qq, remove 2>/dev/null, add -d)
+# 3: + trace on
-do_update()
+check_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"
+ interval="$2"
+
+ if [ $interval -eq 0 ]; then
+ debug_echo "check_stamp: interval=0."
+ # treat as no time has passed
+ return 1
+ fi
+
+ if [ ! -f $stamp ]; then
+ update_stamp $stamp
+ debug_echo "check_stamp: missing time stamp file: $stamp."
+ # treat as enough time has passed
+ return 0
+ fi
+
+ # compare midnight today to midnight the day the stamp was updated
+ stamp=$(date -r $stamp '+%s')
+ delta=$(($now-$stamp))
+
+ # intervall is in days, convert to sec.
+ interval=$(($interval*60*60*24))
+ debug_echo "check_stamp: interval=$interval, now=$now, stamp=$stamp, delta=$delta (sec)"
+
+ if [ $delta -ge $interval ]; then
+ return 0
fi
- rm -f $STAMP.new
+
+ return 1
}
-UpdateInterval=0
-RES=`apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists`
-eval $RES
+update_stamp()
+{
+ stamp="$1"
+ touch $stamp
+}
-if [ $UpdateInterval -eq 0 ]; then
- exit 0
+debug_echo()
+{
+ # Display message if $VERBOSE >= 1
+ if [ "$VERBOSE" -ge 1 ]; then
+ echo $1 1>&2
+ fi
+}
+
+# check apt-config exstance
+if ! which apt-config >/dev/null ; then
+ exit 0
fi
+# Set VERBOSE mode from apt-config (or inherit from environment)
+eval $(apt-config shell VERBOSE APT::Periodic::Verbose)
+if [ -z "$VERBOSE" ]; then
+ VERBOSE="0"
+fi
+if [ "$VERBOSE" -le 2 ]; then
+ # quiet for 0,1,2
+ XSTDOUT=">/dev/null"
+ XSTDERR="2>/dev/null"
+ XAPTOPT="-qq"
+ XUUPOPT=""
+else
+ XSTDOUT=""
+ XSTDERR=""
+ XAPTOPT=""
+ XUUPOPT="-d"
+fi
+if [ "$VERBOSE" -ge 3 ]; then
+ # trace output
+ set -x
+fi
# laptop check, on_ac_power returns:
-# 0 (true) System is on mains power
-# 1 (false) System is not on mains power
+# 0 (true) System is on main power
+# 1 (false) System is not on main 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 [ $? -eq 1 ]; then
+if which on_ac_power >/dev/null; then
+ on_ac_power
+ POWER=$?
+ if [ $POWER -eq 1 ]; then
+ debug_echo "exit: system on main power."
+ exit 0
+ elif [ $POWER -ne 0 ]; then
+ debug_echo "exit: power status ($POWER) undetermined."
exit 0
fi
+ debug_echo "system is on main power."
+fi
+
+# check if we can lock the cache and if the cache is clean
+if which apt-get >/dev/null && ! eval apt-get check $XAPTOPT $XSTDERR ; then
+ debug_echo "error encountered in cron job with \"apt-get check\"."
+ exit 0
+fi
+# No need to check for apt-get below
+
+# Global current time in seconds since 1970-01-01 00:00:00 UTC
+now=$(date +%s)
+
+# Set default values and normalize
+Dir="/"
+eval $(apt-config shell Dir Dir)
+Dir=${Dir%/}
+
+CacheDir="var/cache/apt/"
+eval $(apt-config shell CacheDir Dir::Cache)
+CacheDir=${CacheDir%/}
+if [ -z "$CacheDir" ]; then
+ debug_echo "practically empty Dir::Cache, exiting"
+ exit 0
+fi
+
+CacheArchive="archives/"
+eval $(apt-config shell CacheArchive Dir::Cache::Archives)
+CacheArchive=${CacheArchive%/}
+if [ -z "$CacheArchive" ]; then
+ debug_echo "practically empty Dir::Cache::archives, exiting"
+ exit 0
fi
-if [ ! -f $STAMP ]; then
- do_update
+BackupArchiveInterval=0
+eval $(apt-config shell BackupArchiveInterval APT::Periodic::BackupArchiveInterval)
+
+BackupArchiveLevel=3
+eval $(apt-config shell BackupArchiveLevel APT::Periodic::BackupArchiveLevel)
+if [ $BackupArchiveLevel -le 1 ]; then BackupArchiveLevel=2 ; fi
+
+CacheBackup="backup/"
+eval $(apt-config shell CacheBackup Dir::Cache::Backup)
+CacheBackup=${CacheBackup%/}
+if [ -z "$CacheBackup" ]; then
+ echo "practically empty Dir::Cache::Backup, exiting" 1>&2
exit 0
fi
-LastUpdate=`stat -c "%Y" $STAMP 2>/dev/null`
-Now=`date +%s`
+# Support old Archive for compatibility.
+# Document only Periodic for all controling parameters of this script.
+MaxAge=0
+eval $(apt-config shell MaxAge APT::Archives::MaxAge)
+eval $(apt-config shell MaxAge APT::Periodic::MaxAge)
+
+MinAge=2
+eval $(apt-config shell MinAge APT::Archives::MinAge)
+eval $(apt-config shell MinAge APT::Periodic::MinAge)
+
+MaxSize=0
+eval $(apt-config shell MaxSize APT::Archives::MaxSize)
+eval $(apt-config shell MaxSize APT::Periodic::MaxSize)
+
+UpdateInterval=0
+eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists)
+
+DownloadUpgradeableInterval=0
+eval $(apt-config shell DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
+
+UnattendedUpgradeInterval=0
+eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade)
+
+AutocleanInterval=0
+eval $(apt-config shell AutocleanInterval APT::Periodic::AutocleanInterval)
+
+Cache="${Dir}/${CacheDir}/${CacheArchive}/"
+Back="${Dir}/${CacheDir}/${CacheBackup}/"
+BackX="${Back}${CacheArchive}/"
+for x in $(seq 0 1 $((${BackupLevel}-1))); do
+ eval "Back${x}=${Back}${x}/"
+done
+
+# backup after n-days if archive contents changed.
+# (This uses hardlink to save disk space)
+BACKUP_ARCHIVE_STAMP=/var/lib/apt/periodic/backup-archive-stamp
+if check_stamp $BACKUP_ARCHIVE_STAMP $BackupArchiveInterval; then
+ if [ $({(cd $Cache 2>/dev/null; find . -name "*.deb"); (cd $Back0 2>/dev/null;find . -name "*.deb") ;}| sort|uniq -u|wc -l) -ne 0 ]; then
+ mkdir -p $Back
+ rm -rf $Back$((${BackupLevel}-1))
+ for y in $(seq $((${BackupLevel}-1)) -1 1); do
+ eval BackY=${Back}$y
+ eval BackZ=${Back}$(($y-1))
+ if [ -e $BackZ ]; then mv -f $BackZ $BackY ; fi
+ done
+ cp -la $Cache $Back ; mv -f $BackX $Back0
+ update_stamp $BACKUP_ARCHIVE_STAMP
+ debug_echo "backup with hardlinks. (success)"
+ else
+
+ debug_echo "skip backup since same content."
+ fi
+else
+ debug_echo "skip backup since too new."
+fi
-NeedUpdate=$(($LastUpdate+$UpdateInterval*3600*24))
-if [ $NeedUpdate -le $Now ]; then
- do_update
+# package archive contnts removal by package age
+if [ $MaxAge -ne 0 ] && [ $MinAge -ne 0 ]; then
+ find $Cache -name "*.deb" \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 | xargs -r -0 rm -f
+ debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge and ctime>$MinAge and mtime>$MinAge"
+elif [ $MaxAge -ne 0 ]; then
+ find $Cache -name "*.deb" -ctime +$MaxAge -and -mtime +$MaxAge -print0 | xargs -r -0 rm -f
+ debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge only"
+else
+ debug_echo "skip aging since MaxAge is 0"
fi
+
+# package archive contnts removal down to $MaxSize
+if [ $MaxSize -ne 0 ]; then
+
+ MinAgeSec=$(($MinAge*24*60*60))
+
+ # reverse-sort by mtime
+ for file in $(ls -rt $Cache/*.deb 2>/dev/null); do
+ du=$(du -m -s $Cache)
+ size=${du%%/*}
+ # check if the cache is small enough
+ if [ $size -lt $MaxSize ]; then
+ debug_echo "end remove by archive size: size=$size < $MaxSize"
+ break
+ fi
+
+ # check for MinAge in second of the file
+ if [ $MinAgeSec -ne 0 ]; then
+ # check both ctime and mtime
+ mtime=$(stat -c %Y $file)
+ ctime=$(stat -c %Z $file)
+ if [ $mtime -gt $ctime ]; then
+ delta=$(($now-$mtime))
+ else
+ delta=$(($now-$ctime))
+ fi
+ if [ $delta -le $MinAgeSec ]; then
+ debug_echo "skip remove by archive size: $file, delta=$delta < $MinAgeSec"
+ else
+ # delete oldest file
+ debug_echo "remove by archive size: $file, delta=$delta >= $MinAgeSec (sec), size=$size >= $MaxSize"
+ rm -f $file
+ fi
+ fi
+
+ done
+fi
+
+# update package lists
+UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
+if check_stamp $UPDATE_STAMP $UpdateInterval; then
+ if eval apt-get $XAPTOPT -y update $XSTDERR; then
+ debug_echo "download updated metadata (success)."
+ if which dbus-send >/dev/null; then
+ if dbus-send --system / app.apt.dbus.updated boolean:true ; then
+ debug_echo "send dbus signal (success)"
+ else
+ debug_echo "send dbus signal (error)"
+ fi
+ else
+ debug_echo "dbus signal not send (command not available)"
+ fi
+ update_stamp $UPDATE_STAMP
+ # download all upgradeable packages if it is requested
+ DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
+ if check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
+ if eval apt-get $XAPTOPT -y -d dist-upgrade $XSTDERR; then
+ update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
+ debug_echo "download upgradable (success)."
+ # auto upgrade all upgradeable packages
+ UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
+ if which unattended-upgrade >/dev/null && check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then
+ if unattended-upgrade $XUUPOPT; then
+ update_stamp $UPGRADE_STAMP
+ debug_echo "unattended-upgrade (success)."
+ else
+ debug_echo "unattended-upgrade (error)."
+ fi
+ else
+ debug_echo "unattended-upgrade (not run)."
+ fi
+ else
+ debug_echo "download upgradable (error)."
+ fi
+ else
+ debug_echo "download upgradable (not run)."
+ fi
+ else
+ debug_echo "download updated metadata (error)."
+ fi
+else
+ debug_echo "download updated metadata (not run)."
+fi
+
+# autoclean package archive
+AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
+if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
+ if apt-get $XAPTOPT -y autoclean $XSTDERR; then
+ debug_echo "autoclean (success)."
+ update_stamp $AUTOCLEAN_STAMP
+ else
+ debug_echo "autoclean (error)."
+ fi
+else
+ debug_echo "autoclean (not run)."
+fi
+
+#
+# vim: set sts=4 ai :
+#
+
projects / apt.git / blobdiff