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496 lines
14 KiB
496 lines
14 KiB
#!/bin/sh
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#set -e
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#
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# This file understands the following apt configuration variables:
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# Values here are the default.
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# Create /etc/apt/apt.conf.d/02periodic file to set your preference.
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#
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# Dir "/";
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# - RootDir for all configuration files
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#
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# Dir::Cache "var/apt/cache/";
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# - Set apt package cache directory
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#
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# Dir::Cache::Archive "archives/";
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# - Set package archive directory
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#
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# APT::Periodic::Enable "1";
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# - Enable the update/upgrade script (0=disable)
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#
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# APT::Periodic::BackupArchiveInterval "0";
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# - Backup after n-days if archive contents changed.(0=disable)
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#
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# APT::Periodic::BackupLevel "3";
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# - Backup level.(0=disable), 1 is invalid.
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#
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# Dir::Cache::Backup "backup/";
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# - Set periodic package backup directory
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#
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# APT::Archives::MaxAge "0"; (old, deprecated)
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# APT::Periodic::MaxAge "0"; (new)
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# - Set maximum allowed age of a cache package file. If a cache
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# package file is older it is deleted (0=disable)
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#
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# APT::Archives::MinAge "2"; (old, deprecated)
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# APT::Periodic::MinAge "2"; (new)
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# - Set minimum age of a package file. If a file is younger it
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# will not be deleted (0=disable). Usefull to prevent races
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# and to keep backups of the packages for emergency.
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#
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# APT::Archives::MaxSize "0"; (old, deprecated)
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# APT::Periodic::MaxSize "0"; (new)
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# - Set maximum size of the cache in MB (0=disable). If the cache
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# is bigger, cached package files are deleted until the size
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# requirement is met (the biggest packages will be deleted
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# first).
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#
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# APT::Periodic::Update-Package-Lists "0";
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# - Do "apt-get update" automatically every n-days (0=disable)
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#
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# APT::Periodic::Download-Upgradeable-Packages "0";
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# - Do "apt-get upgrade --download-only" every n-days (0=disable)
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#
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# APT::Periodic::Download-Upgradeable-Packages-Debdelta "1";
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# - Use debdelta-upgrade to download updates if available (0=disable)
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#
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# APT::Periodic::Unattended-Upgrade "0";
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# - Run the "unattended-upgrade" security upgrade script
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# every n-days (0=disabled)
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# Requires the package "unattended-upgrades" and will write
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# a log in /var/log/unattended-upgrades
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#
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# APT::Periodic::AutocleanInterval "0";
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# - Do "apt-get autoclean" every n-days (0=disable)
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#
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# APT::Periodic::Verbose "0";
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# - Send report mail to root
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# 0: no report (or null string)
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# 1: progress report (actually any string)
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# 2: + command outputs (remove -qq, remove 2>/dev/null, add -d)
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# 3: + trace on
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check_stamp()
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{
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stamp="$1"
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interval="$2"
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if [ $interval -eq 0 ]; then
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debug_echo "check_stamp: interval=0"
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# treat as no time has passed
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return 1
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fi
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if [ ! -f $stamp ]; then
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debug_echo "check_stamp: missing time stamp file: $stamp."
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# treat as enough time has passed
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return 0
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fi
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# compare midnight today to midnight the day the stamp was updated
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stamp_file="$stamp"
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stamp=$(date --date=$(date -r $stamp_file --iso-8601) +%s 2>/dev/null)
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if [ "$?" != "0" ]; then
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# Due to some timezones returning 'invalid date' for midnight on
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# certain dates (eg America/Sao_Paulo), if date returns with error
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# remove the stamp file and return 0. See coreutils bug:
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# http://lists.gnu.org/archive/html/bug-coreutils/2007-09/msg00176.html
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rm -f "$stamp_file"
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return 0
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fi
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now=$(date --date=$(date --iso-8601) +%s 2>/dev/null)
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if [ "$?" != "0" ]; then
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# As above, due to some timezones returning 'invalid date' for midnight
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# on certain dates (eg America/Sao_Paulo), if date returns with error
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# return 0.
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return 0
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fi
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delta=$(($now-$stamp))
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# intervall is in days, convert to sec.
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interval=$(($interval*60*60*24))
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debug_echo "check_stamp: interval=$interval, now=$now, stamp=$stamp, delta=$delta (sec)"
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# remove timestamps a day (or more) in the future and force re-check
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if [ $stamp -gt $(($now+86400)) ]; then
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echo "WARNING: file $stamp_file has a timestamp in the future: $stamp"
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rm -f "$stamp_file"
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return 0
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fi
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if [ $delta -ge $interval ]; then
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return 0
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fi
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return 1
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}
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update_stamp()
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{
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stamp="$1"
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touch $stamp
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}
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# we check here if autoclean was enough sizewise
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check_size_constraints()
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{
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MaxAge=0
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eval $(apt-config shell MaxAge APT::Archives::MaxAge)
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eval $(apt-config shell MaxAge APT::Periodic::MaxAge)
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MinAge=2
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eval $(apt-config shell MinAge APT::Archives::MinAge)
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eval $(apt-config shell MinAge APT::Periodic::MinAge)
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MaxSize=0
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eval $(apt-config shell MaxSize APT::Archives::MaxSize)
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eval $(apt-config shell MaxSize APT::Periodic::MaxSize)
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CacheDir="var/cache/apt/"
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eval $(apt-config shell CacheDir Dir::Cache)
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CacheDir=${CacheDir%/}
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CacheArchive="archives/"
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eval $(apt-config shell CacheArchive Dir::Cache::archives)
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CacheArchive=${CacheArchive%/}
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# sanity check
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if [ -z "$CacheDir" -o -z "$CacheArchive" ]; then
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echo "empty Dir::Cache or Dir::Cache::archives, exiting"
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exit
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fi
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Cache="${Dir%/}/${CacheDir%/}/${CacheArchive%/}/"
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# check age
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if [ ! $MaxAge -eq 0 ] && [ ! $MinAge -eq 0 ]; then
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debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge and ctime>$MinAge and mtime>$MinAge"
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find $Cache -name "*.deb" \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 | xargs -r -0 rm -f
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elif [ ! $MaxAge -eq 0 ]; then
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debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge only"
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find $Cache -name "*.deb" -ctime +$MaxAge -and -mtime +$MaxAge -print0 | xargs -r -0 rm -f
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else
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debug_echo "skip aging since MaxAge is 0"
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fi
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# check size
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if [ ! $MaxSize -eq 0 ]; then
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# maxSize is in MB
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MaxSize=$(($MaxSize*1024))
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#get current time
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now=$(date --date=$(date --iso-8601) +%s)
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MinAge=$(($MinAge*24*60*60))
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# reverse-sort by mtime
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for file in $(ls -rt $Cache/*.deb 2>/dev/null); do
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du=$(du -s $Cache)
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size=${du%%/*}
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# check if the cache is small enough
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if [ $size -lt $MaxSize ]; then
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debug_echo "end remove by archive size: size=$size < $MaxSize"
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break
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fi
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# check for MinAge of the file
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if [ $MinAge -ne 0 ]; then
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# check both ctime and mtime
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mtime=$(stat -c %Y $file)
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ctime=$(stat -c %Z $file)
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if [ $mtime -gt $ctime ]; then
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delta=$(($now-$mtime))
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else
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delta=$(($now-$ctime))
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fi
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if [ $delta -le $MinAge ]; then
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debug_echo "skip remove by archive size: $file, delta=$delta < $MinAgeSec"
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break
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else
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# delete oldest file
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debug_echo "remove by archive size: $file, delta=$delta >= $MinAgeSec (sec), size=$size >= $MaxSize"
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rm -f $file
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fi
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fi
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done
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fi
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}
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# deal with the Apt::Periodic::BackupArchiveInterval
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do_cache_backup()
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{
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BackupArchiveInterval="$1"
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if [ $BackupArchiveInterval -eq 0 ]; then
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return
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fi
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# Set default values and normalize
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Dir="/"
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eval $(apt-config shell Dir Dir)
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Dir=${Dir%/}
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CacheDir="var/cache/apt/"
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eval $(apt-config shell CacheDir Dir::Cache)
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CacheDir=${CacheDir%/}
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if [ -z "$CacheDir" ]; then
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debug_echo "practically empty Dir::Cache, exiting"
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return 0
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fi
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CacheArchive="archives/"
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eval $(apt-config shell CacheArchive Dir::Cache::Archives)
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CacheArchive=${CacheArchive%/}
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if [ -z "$CacheArchive" ]; then
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debug_echo "practically empty Dir::Cache::archives, exiting"
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return 0
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fi
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BackupLevel=3
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eval $(apt-config shell BackupLevel APT::Periodic::BackupLevel)
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if [ $BackupLevel -le 1 ]; then
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BackupLevel=2 ;
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fi
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CacheBackup="backup/"
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eval $(apt-config shell CacheBackup Dir::Cache::Backup)
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CacheBackup=${CacheBackup%/}
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if [ -z "$CacheBackup" ]; then
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echo "practically empty Dir::Cache::Backup, exiting" 1>&2
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return
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fi
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Cache="${Dir}/${CacheDir}/${CacheArchive}/"
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Back="${Dir}/${CacheDir}/${CacheBackup}/"
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BackX="${Back}${CacheArchive}/"
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for x in $(seq 0 1 $((${BackupLevel}-1))); do
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eval "Back${x}=${Back}${x}/"
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done
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# backup after n-days if archive contents changed.
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# (This uses hardlink to save disk space)
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BACKUP_ARCHIVE_STAMP=/var/lib/apt/periodic/backup-archive-stamp
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if check_stamp $BACKUP_ARCHIVE_STAMP $BackupArchiveInterval; then
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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
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mkdir -p $Back
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rm -rf $Back$((${BackupLevel}-1))
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for y in $(seq $((${BackupLevel}-1)) -1 1); do
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eval BackY=${Back}$y
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eval BackZ=${Back}$(($y-1))
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if [ -e $BackZ ]; then
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mv -f $BackZ $BackY ;
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fi
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done
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cp -la $Cache $Back ; mv -f $BackX $Back0
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update_stamp $BACKUP_ARCHIVE_STAMP
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debug_echo "backup with hardlinks. (success)"
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else
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debug_echo "skip backup since same content."
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fi
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else
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debug_echo "skip backup since too new."
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fi
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}
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# sleep for a random interval of time (default 30min)
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# (some code taken from cron-apt, thanks)
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random_sleep()
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{
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RandomSleep=1800
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eval $(apt-config shell RandomSleep APT::Periodic::RandomSleep)
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if [ $RandomSleep -eq 0 ]; then
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return
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fi
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if [ -z "$RANDOM" ] ; then
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# A fix for shells that do not have this bash feature.
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RANDOM=$(dd if=/dev/urandom count=1 2> /dev/null | cksum | cut -c"1-5")
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fi
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TIME=$(($RANDOM % $RandomSleep))
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debug_echo "sleeping for $TIME seconds"
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sleep $TIME
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}
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debug_echo()
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{
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# Display message if $VERBOSE >= 1
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if [ "$VERBOSE" -ge 1 ]; then
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echo $1 1>&2
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fi
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}
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# ------------------------ main ----------------------------
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# check apt-config exstance
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if ! which apt-config >/dev/null ; then
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exit 0
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fi
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# check if the user really wants to do something
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AutoAptEnable=1 # default is yes
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eval $(apt-config shell AutoAptEnable APT::Periodic::Enable)
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if [ $AutoAptEnable -eq 0 ]; then
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exit 0
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fi
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# Set VERBOSE mode from apt-config (or inherit from environment)
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VERBOSE=0
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eval $(apt-config shell VERBOSE APT::Periodic::Verbose)
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debug_echo "verbose level $VERBOSE"
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if [ "$VERBOSE" -le 2 ]; then
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# quiet for 0,1,2
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XSTDOUT=">/dev/null"
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XSTDERR="2>/dev/null"
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XAPTOPT="-qq"
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XUUPOPT=""
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else
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XSTDOUT=""
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XSTDERR=""
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XAPTOPT=""
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XUUPOPT="-d"
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fi
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if [ "$VERBOSE" -ge 3 ]; then
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# trace output
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set -x
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fi
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# laptop check, on_ac_power returns:
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# 0 (true) System is on main power
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# 1 (false) System is not on main power
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# 255 (false) Power status could not be determined
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# Desktop systems always return 255 it seems
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if which on_ac_power >/dev/null; then
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on_ac_power
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POWER=$?
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if [ $POWER -eq 1 ]; then
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debug_echo "exit: system NOT on main power"
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exit 0
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elif [ $POWER -ne 0 ]; then
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debug_echo "power status ($POWER) undetermined, continuing"
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fi
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debug_echo "system is on main power."
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fi
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# check if we can lock the cache and if the cache is clean
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if which apt-get >/dev/null && ! eval apt-get check -f $XAPTOPT $XSTDERR ; then
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debug_echo "error encountered in cron job with \"apt-get check\"."
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exit 0
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fi
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# Global current time in seconds since 1970-01-01 00:00:00 UTC
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now=$(date +%s)
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# Support old Archive for compatibility.
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# Document only Periodic for all controling parameters of this script.
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UpdateInterval=0
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eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists)
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DownloadUpgradeableInterval=0
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eval $(apt-config shell DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
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UnattendedUpgradeInterval=0
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eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade)
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AutocleanInterval=0
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eval $(apt-config shell AutocleanInterval APT::Periodic::AutocleanInterval)
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BackupArchiveInterval=0
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eval $(apt-config shell BackupArchiveInterval APT::Periodic::BackupArchiveInterval)
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Debdelta=1
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eval $(apt-config shell Debdelta APT::Periodic::Download-Upgradeable-Packages-Debdelta)
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# check if we actually have to do anything that requires locking the cache
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if [ $UpdateInterval -eq 0 ] &&
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[ $DownloadUpgradeableInterval -eq 0 ] &&
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[ $UnattendedUpgradeInterval -eq 0 ] &&
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[ $BackupArchiveInterval -eq 0 ] &&
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[ $AutocleanInterval -eq 0 ]; then
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# check cache size
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check_size_constraints
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exit 0
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fi
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# deal with BackupArchiveInterval
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do_cache_backup $BackupArchiveInterval
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# sleep random amount of time to avoid hitting the
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# mirrors at the same time
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random_sleep
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# update package lists
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UPDATED=0
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UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
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if check_stamp $UPDATE_STAMP $UpdateInterval; then
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if eval apt-get $XAPTOPT -y update $XSTDERR; then
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debug_echo "download updated metadata (success)."
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if which dbus-send >/dev/null && pidof dbus-daemon >/dev/null; then
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if dbus-send --system / app.apt.dbus.updated boolean:true ; then
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debug_echo "send dbus signal (success)"
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else
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debug_echo "send dbus signal (error)"
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fi
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else
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debug_echo "dbus signal not send (command not available)"
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fi
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update_stamp $UPDATE_STAMP
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UPDATED=1
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else
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debug_echo "download updated metadata (error)"
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fi
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else
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debug_echo "download updated metadata (not run)."
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fi
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# download all upgradeable packages (if it is requested)
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DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
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if [ $UPDATED -eq 1 ] && check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
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if [ $Debdelta -eq 1 ]; then
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debdelta-upgrade >/dev/null 2>&1 || true
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fi
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if eval apt-get $XAPTOPT -y -d dist-upgrade $XSTDERR; then
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update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
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debug_echo "download upgradable (success)"
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else
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debug_echo "download upgradable (error)"
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fi
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else
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debug_echo "download upgradable (not run)"
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fi
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# auto upgrade all upgradeable packages
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UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
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if [ $UPDATED -eq 1 ] && which unattended-upgrade >/dev/null && check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then
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if unattended-upgrade $XUUPOPT; then
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update_stamp $UPGRADE_STAMP
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debug_echo "unattended-upgrade (success)"
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else
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debug_echo "unattended-upgrade (error)"
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fi
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else
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debug_echo "unattended-upgrade (not run)"
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fi
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# autoclean package archive
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AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
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if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
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if eval apt-get $XAPTOPT -y autoclean $XSTDERR; then
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debug_echo "autoclean (success)."
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update_stamp $AUTOCLEAN_STAMP
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else
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debug_echo "autoclean (error)"
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fi
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else
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debug_echo "autoclean (not run)"
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fi
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# check cache size
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check_size_constraints
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#
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# vim: set sts=4 ai :
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#
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