[ntk/apt.git] / debian / apt.cron.daily

#!/bin/sh
#set -e
#
# 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.
#
#  Dir "/";
#  - RootDir for all configuration files
#
#  Dir::Cache "var/apt/cache/";
#  - Set apt package cache directory
#
#  Dir::Cache::Archive "archives/";
#  - Set package archive directory
#
#  APT::Periodic::Enable "1";
#  - Enable the update/upgrade script (0=disable)
#
#  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::Download-Upgradeable-Packages-Debdelta "1";
#  - Use debdelta-upgrade to download updates if available (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            

check_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
	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_file="$stamp"
    stamp=$(date --date=$(date -r $stamp_file --iso-8601) +%s 2>/dev/null)
    if [ "$?" != "0" ]; then
        # Due to some timezones returning 'invalid date' for midnight on
        # certain dates (eg America/Sao_Paulo), if date returns with error
        # remove the stamp file and return 0. See coreutils bug:
        # http://lists.gnu.org/archive/html/bug-coreutils/2007-09/msg00176.html
        rm -f "$stamp_file"
        return 0
    fi

    now=$(date --date=$(date --iso-8601) +%s 2>/dev/null)
    if [ "$?" != "0" ]; then
        # As above, due to some timezones returning 'invalid date' for midnight
        # on certain dates (eg America/Sao_Paulo), if date returns with error
        # return 0.
        return 0
    fi

    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)"

    # remove timestamps a day (or more) in the future and force re-check
    if [ $stamp -gt $(($now+86400)) ]; then
         echo "WARNING: file $stamp_file has a timestamp in the future: $stamp"
         rm -f "$stamp_file"
         return 0
    fi

    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()
{
    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)

    CacheDir="var/cache/apt/"
    eval $(apt-config shell CacheDir Dir::Cache)
    CacheDir=${CacheDir%/}

    CacheArchive="archives/"
    eval $(apt-config shell CacheArchive Dir::Cache::archives)
    CacheArchive=${CacheArchive%/}

    # 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 ] && [ ! $MinAge -eq 0 ]; then
	debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge and ctime>$MinAge and mtime>$MinAge"
	find $Cache -name "*.deb"  \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 | xargs -r -0 rm -f
    elif [ ! $MaxAge -eq 0 ]; then
	debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge only"
	find $Cache -name "*.deb"  -ctime +$MaxAge -and -mtime +$MaxAge -print0 | xargs -r -0 rm -f
    else
	debug_echo "skip aging since MaxAge is 0"
    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 $MaxSize ]; then
		debug_echo "end remove by archive size:  size=$size < $MaxSize"
		break
	    fi

	    # check for MinAge of the file
	    if [ $MinAge -ne 0 ]; then 
		# check both ctime and mtime 
		mtime=$(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 $MinAge ]; then
		    debug_echo "skip remove by archive size:  $file, delta=$delta < $MinAgeSec"
		    break
		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
}

# deal with the Apt::Periodic::BackupArchiveInterval
do_cache_backup()
{
    BackupArchiveInterval="$1"
    if [ $BackupArchiveInterval -eq 0 ]; then
	return
    fi

    # 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"
	return 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"
	return 0
    fi

    BackupLevel=3
    eval $(apt-config shell BackupLevel APT::Periodic::BackupLevel)
    if [ $BackupLevel -le 1 ]; then 
	BackupLevel=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
	return
    fi

    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
}

# sleep for a random interval of time (default 30min)
# (some code taken from cron-apt, thanks)
random_sleep()
{
    RandomSleep=1800
    eval $(apt-config shell RandomSleep APT::Periodic::RandomSleep)
    if [ $RandomSleep -eq 0 ]; then
	return
    fi
    if [ -z "$RANDOM" ] ; then
        # A fix for shells that do not have this bash feature.
	RANDOM=$(dd if=/dev/urandom count=1 2> /dev/null | cksum | cut -c"1-5")
    fi
    TIME=$(($RANDOM % $RandomSleep))
    debug_echo "sleeping for $TIME seconds"
    sleep $TIME
}


debug_echo()
{
    # Display message if $VERBOSE >= 1
    if [ "$VERBOSE" -ge 1 ]; then
	echo $1 1>&2
    fi
}

# ------------------------ main ----------------------------

# check apt-config exstance
if ! which apt-config >/dev/null ; then
	exit 0
fi

# check if the user really wants to do something
AutoAptEnable=1  # default is yes
eval $(apt-config shell AutoAptEnable APT::Periodic::Enable)

if [ AutoAptEnable -eq 0 ]; then
    exit 0
fi

# Set VERBOSE mode from  apt-config (or inherit from environment)
VERBOSE=0
eval $(apt-config shell VERBOSE APT::Periodic::Verbose)
debug_echo "verbose level $VERBOSE"
if [ "$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 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 which on_ac_power >/dev/null; then
    on_ac_power
    POWER=$?
    if [ $POWER -eq 1 ]; then
	debug_echo "exit: system NOT on main power"
	exit 0
    elif [ $POWER -ne 0 ]; then
	debug_echo "power status ($POWER) undetermined, continuing"
    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 -f $XAPTOPT $XSTDERR ; then
    debug_echo "error encountered in cron job with \"apt-get check\"."
    exit 0
fi

# Global current time in seconds since 1970-01-01 00:00:00 UTC
now=$(date +%s)

# Support old Archive for compatibility.
# Document only Periodic for all controling parameters of this script.

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)

BackupArchiveInterval=0
eval $(apt-config shell BackupArchiveInterval APT::Periodic::BackupArchiveInterval)

Debdelta=1
eval $(apt-config shell Debdelta APT::Periodic::Download-Upgradeable-Packages-Debdelta)

# check if we actually have to do anything
if [ $UpdateInterval -eq 0 ] &&
   [ $DownloadUpgradeableInterval -eq 0 ] &&
   [ $UnattendedUpgradeInterval -eq 0 ] &&
   [ $BackupArchiveInterval -eq 0 ] &&
   [ $AutocleanInterval -eq 0 ]; then
    exit 0
fi

# deal with BackupArchiveInterval
do_cache_backup $BackupArchiveInterval

# sleep random amount of time to avoid hitting the 
# mirrors at the same time
random_sleep

# update package lists
UPDATED=0
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 && pidof dbus-daemon >/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
	UPDATED=1
    else
	debug_echo "download updated metadata (error)"
    fi
else
    debug_echo "download updated metadata (not run)."
fi
	
# download all upgradeable packages (if it is requested)
DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
if [ $UPDATED -eq 1 ] && check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
    if [ $Debdelta -eq 1 ]; then
        debdelta-upgrade >/dev/null 2>&1 || true
    fi
    if  eval apt-get $XAPTOPT -y -d dist-upgrade $XSTDERR; then
	update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
	debug_echo "download upgradable (success)"
    else
	debug_echo "download upgradable (error)"
    fi
else
    debug_echo "download upgradable (not run)"
fi

# auto upgrade all upgradeable packages
UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
if [ $UPDATED -eq 1 ] && 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

# autoclean package archive
AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
    if  eval 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

# check cache size 
check_size_constraints

#
#     vim: set sts=4 ai :
#
Commit	Line	Data
0c132682	1	#!/bin/sh
0c132682	2	#set -e
8a139d4d MV	3	#
8a139d4d MV	4	# This file understands the following apt configuration variables:
ff7c76f8 OA	5	# Values here are the default.
ff7c76f8 OA	6	# Create /etc/apt/apt.conf.d/02periodic file to set your preference.
8a139d4d	7	#
ff7c76f8 OA	8	# Dir "/";
ff7c76f8 OA	9	# - RootDir for all configuration files
8a139d4d	10	#
ff7c76f8 OA	11	# Dir::Cache "var/apt/cache/";
	12	# - Set apt package cache directory
	13	#
	14	# Dir::Cache::Archive "archives/";
	15	# - Set package archive directory
	16	#
17443d48 JAK	17	# APT::Periodic::Enable "1";
	18	# - Enable the update/upgrade script (0=disable)
	19	#
ff7c76f8 OA	20	# APT::Periodic::BackupArchiveInterval "0";
	21	# - Backup after n-days if archive contents changed.(0=disable)
	22	#
	23	# APT::Periodic::BackupLevel "3";
	24	# - Backup level.(0=disable), 1 is invalid.
	25	#
	26	# Dir::Cache::Backup "backup/";
	27	# - Set periodic package backup directory
	28	#
	29	# APT::Archives::MaxAge "0"; (old, deprecated)
	30	# APT::Periodic::MaxAge "0"; (new)
8a139d4d MV	31	# - Set maximum allowed age of a cache package file. If a cache
	32	# package file is older it is deleted (0=disable)
	33	#
ff7c76f8 OA	34	# APT::Archives::MinAge "2"; (old, deprecated)
	35	# APT::Periodic::MinAge "2"; (new)
	36	# - Set minimum age of a package file. If a file is younger it
	37	# will not be deleted (0=disable). Usefull to prevent races
	38	# and to keep backups of the packages for emergency.
	39	#
	40	# APT::Archives::MaxSize "0"; (old, deprecated)
	41	# APT::Periodic::MaxSize "0"; (new)
8a139d4d MV	42	# - Set maximum size of the cache in MB (0=disable). If the cache
	43	# is bigger, cached package files are deleted until the size
	44	# requirement is met (the biggest packages will be deleted
	45	# first).
	46	#
ff7c76f8 OA	47	# APT::Periodic::Update-Package-Lists "0";
	48	# - Do "apt-get update" automatically every n-days (0=disable)
	49	#
	50	# APT::Periodic::Download-Upgradeable-Packages "0";
	51	# - Do "apt-get upgrade --download-only" every n-days (0=disable)
6b519e42 JAK	52	#
	53	# APT::Periodic::Download-Upgradeable-Packages-Debdelta "1";
	54	# - Use debdelta-upgrade to download updates if available (0=disable)
	55	#
ff7c76f8 OA	56	# APT::Periodic::Unattended-Upgrade "0";
	57	# - Run the "unattended-upgrade" security upgrade script
	58	# every n-days (0=disabled)
	59	# Requires the package "unattended-upgrades" and will write
	60	# a log in /var/log/unattended-upgrades
8a139d4d	61	#
ff7c76f8 OA	62	# APT::Periodic::AutocleanInterval "0";
	63	# - Do "apt-get autoclean" every n-days (0=disable)
	64	#
	65	# APT::Periodic::Verbose "0";
	66	# - Send report mail to root
	67	# 0: no report (or null string)
	68	# 1: progress report (actually any string)
	69	# 2: + command outputs (remove -qq, remove 2>/dev/null, add -d)
	70	# 3: + trace on
0c132682	71
05f6a46a	72	check_stamp()
0c132682	73	{
05f6a46a MZ	74	stamp="$1"
	75	interval="$2"
	76
10946ddc	77	if [ $interval -eq 0 ]; then
53391d0f	78	debug_echo "check_stamp: interval=0"
ff7c76f8	79	# treat as no time has passed
10946ddc MZ	80	return 1
	81	fi
	82
05f6a46a	83	if [ ! -f $stamp ]; then
ff7c76f8 OA	84	debug_echo "check_stamp: missing time stamp file: $stamp."
ff7c76f8 OA	85	# treat as enough time has passed
05f6a46a	86	return 0
0c132682	87	fi
05f6a46a MZ	88
05f6a46a MZ	89	# compare midnight today to midnight the day the stamp was updated
a7c526b6 MV	90	stamp_file="$stamp"
	91	stamp=$(date --date=$(date -r $stamp_file --iso-8601) +%s 2>/dev/null)
	92	if [ "$?" != "0" ]; then
	93	# Due to some timezones returning 'invalid date' for midnight on
	94	# certain dates (eg America/Sao_Paulo), if date returns with error
	95	# remove the stamp file and return 0. See coreutils bug:
	96	# http://lists.gnu.org/archive/html/bug-coreutils/2007-09/msg00176.html
	97	rm -f "$stamp_file"
	98	return 0
	99	fi
	100
	101	now=$(date --date=$(date --iso-8601) +%s 2>/dev/null)
	102	if [ "$?" != "0" ]; then
	103	# As above, due to some timezones returning 'invalid date' for midnight
	104	# on certain dates (eg America/Sao_Paulo), if date returns with error
	105	# return 0.
	106	return 0
	107	fi
	108
05f6a46a	109	delta=$(($now-$stamp))
05f6a46a	110
ff7c76f8	111	# intervall is in days, convert to sec.
8a139d4d	112	interval=$(($interval6060*24))
ff7c76f8	113	debug_echo "check_stamp: interval=$interval, now=$now, stamp=$stamp, delta=$delta (sec)"
8a139d4d	114
6e7c6c3f MV	115	# remove timestamps a day (or more) in the future and force re-check
	116	if [ $stamp -gt $(($now+86400)) ]; then
	117	echo "WARNING: file $stamp_file has a timestamp in the future: $stamp"
	118	rm -f "$stamp_file"
	119	return 0
	120	fi
	121
05f6a46a MZ	122	if [ $delta -ge $interval ]; then
	123	return 0
	124	fi
	125
	126	return 1
	127	}
	128
	129	update_stamp()
	130	{
	131	stamp="$1"
05f6a46a	132	touch $stamp
0c132682 MZ	133	}
0c132682 MZ	134
6cce801a	135	# we check here if autoclean was enough sizewise
2e8a92e5	136	check_size_constraints()
6cce801a	137	{
6cce801a	138	MaxAge=0
6cce801a	139	eval $(apt-config shell MaxAge APT::Archives::MaxAge)
c98870b0 MV	140	eval $(apt-config shell MaxAge APT::Periodic::MaxAge)
	141
	142	MinAge=2
8a139d4d	143	eval $(apt-config shell MinAge APT::Archives::MinAge)
c98870b0 MV	144	eval $(apt-config shell MinAge APT::Periodic::MinAge)
	145
	146	MaxSize=0
6cce801a	147	eval $(apt-config shell MaxSize APT::Archives::MaxSize)
c98870b0 MV	148	eval $(apt-config shell MaxSize APT::Periodic::MaxSize)
	149
	150	CacheDir="var/cache/apt/"
6cce801a	151	eval $(apt-config shell CacheDir Dir::Cache)
c98870b0 MV	152	CacheDir=${CacheDir%/}
	153
	154	CacheArchive="archives/"
6cce801a	155	eval $(apt-config shell CacheArchive Dir::Cache::archives)
c98870b0	156	CacheArchive=${CacheArchive%/}
6cce801a MV	157
	158	# sanity check
	159	if [ -z "$CacheDir" -o -z "$CacheArchive" ]; then
	160	echo "empty Dir::Cache or Dir::Cache::archives, exiting"
	161	exit
	162	fi
01717245 MV	163
01717245 MV	164	Cache="${Dir%/}/${CacheDir%/}/${CacheArchive%/}/"
6cce801a MV	165
6cce801a MV	166	# check age
8a139d4d	167	if [ ! $MaxAge -eq 0 ] && [ ! $MinAge -eq 0 ]; then
c98870b0	168	debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge and ctime>$MinAge and mtime>$MinAge"
8e29e348	169	find $Cache -name "*.deb" \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 \| xargs -r -0 rm -f
8a139d4d	170	elif [ ! $MaxAge -eq 0 ]; then
c98870b0	171	debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge only"
8e29e348	172	find $Cache -name "*.deb" -ctime +$MaxAge -and -mtime +$MaxAge -print0 \| xargs -r -0 rm -f
c98870b0 MV	173	else
c98870b0 MV	174	debug_echo "skip aging since MaxAge is 0"
6cce801a MV	175	fi
	176
	177	# check size
	178	if [ ! $MaxSize -eq 0 ]; then
8a139d4d MV	179	# maxSize is in MB
	180	MaxSize=$(($MaxSize*1024))
	181
	182	#get current time
	183	now=$(date --date=$(date --iso-8601) +%s)
	184	MinAge=$(($MinAge2460*60))
	185
6cce801a	186	# reverse-sort by mtime
3408b58c	187	for file in $(ls -rt $Cache/*.deb 2>/dev/null); do
6cce801a MV	188	du=$(du -s $Cache)
	189	size=${du%%/*}
	190	# check if the cache is small enough
	191	if [ $size -lt $MaxSize ]; then
c98870b0	192	debug_echo "end remove by archive size: size=$size < $MaxSize"
6cce801a MV	193	break
6cce801a MV	194	fi
8a139d4d MV	195
8a139d4d MV	196	# check for MinAge of the file
c98870b0	197	if [ $MinAge -ne 0 ]; then
8e29e348	198	# check both ctime and mtime
3971f8e8	199	mtime=$(stat -c %Y $file)
8e29e348 MV	200	ctime=$(stat -c %Z $file)
	201	if [ $mtime -gt $ctime ]; then
	202	delta=$(($now-$mtime))
	203	else
	204	delta=$(($now-$ctime))
	205	fi
8a139d4d	206	if [ $delta -le $MinAge ]; then
c98870b0	207	debug_echo "skip remove by archive size: $file, delta=$delta < $MinAgeSec"
3408b58c	208	break
c98870b0 MV	209	else
	210	# delete oldest file
	211	debug_echo "remove by archive size: $file, delta=$delta >= $MinAgeSec (sec), size=$size >= $MaxSize"
	212	rm -f $file
8a139d4d MV	213	fi
8a139d4d MV	214	fi
6cce801a MV	215	done
	216	fi
	217	}
	218
c98870b0 MV	219	# deal with the Apt::Periodic::BackupArchiveInterval
	220	do_cache_backup()
	221	{
	222	BackupArchiveInterval="$1"
	223	if [ $BackupArchiveInterval -eq 0 ]; then
	224	return
	225	fi
	226
	227	# Set default values and normalize
	228	Dir="/"
	229	eval $(apt-config shell Dir Dir)
	230	Dir=${Dir%/}
	231
	232	CacheDir="var/cache/apt/"
	233	eval $(apt-config shell CacheDir Dir::Cache)
	234	CacheDir=${CacheDir%/}
	235	if [ -z "$CacheDir" ]; then
	236	debug_echo "practically empty Dir::Cache, exiting"
	237	return 0
	238	fi
	239
	240	CacheArchive="archives/"
	241	eval $(apt-config shell CacheArchive Dir::Cache::Archives)
	242	CacheArchive=${CacheArchive%/}
	243	if [ -z "$CacheArchive" ]; then
	244	debug_echo "practically empty Dir::Cache::archives, exiting"
	245	return 0
	246	fi
	247
	248	BackupLevel=3
	249	eval $(apt-config shell BackupLevel APT::Periodic::BackupLevel)
	250	if [ $BackupLevel -le 1 ]; then
	251	BackupLevel=2 ;
	252	fi
	253
	254	CacheBackup="backup/"
	255	eval $(apt-config shell CacheBackup Dir::Cache::Backup)
	256	CacheBackup=${CacheBackup%/}
	257	if [ -z "$CacheBackup" ]; then
	258	echo "practically empty Dir::Cache::Backup, exiting" 1>&2
	259	return
	260	fi
	261
	262	Cache="${Dir}/${CacheDir}/${CacheArchive}/"
	263	Back="${Dir}/${CacheDir}/${CacheBackup}/"
	264	BackX="${Back}${CacheArchive}/"
	265	for x in $(seq 0 1 $((${BackupLevel}-1))); do
	266	eval "Back${x}=${Back}${x}/"
	267	done
	268
	269	# backup after n-days if archive contents changed.
	270	# (This uses hardlink to save disk space)
	271	BACKUP_ARCHIVE_STAMP=/var/lib/apt/periodic/backup-archive-stamp
	272	if check_stamp $BACKUP_ARCHIVE_STAMP $BackupArchiveInterval; then
	273	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
	274	mkdir -p $Back
	275	rm -rf $Back$((${BackupLevel}-1))
	276	for y in $(seq $((${BackupLevel}-1)) -1 1); do
	277	eval BackY=${Back}$y
	278	eval BackZ=${Back}$(($y-1))
	279	if [ -e $BackZ ]; then
	280	mv -f $BackZ $BackY ;
	281	fi
	282	done
283	cp -la $Cache $Back ; mv -f $BackX $Back0
284	update_stamp $BACKUP_ARCHIVE_STAMP
285	debug_echo "backup with hardlinks. (success)"
286	else
287	debug_echo "skip backup since same content."
288	fi
289	else
290	debug_echo "skip backup since too new."
291	fi
292	}
293
d047c6da	294	# sleep for a random interval of time (default 30min)
69c28efc MV	295	# (some code taken from cron-apt, thanks)
	296	random_sleep()
	297	{
	298	RandomSleep=1800
	299	eval $(apt-config shell RandomSleep APT::Periodic::RandomSleep)
	300	if [ $RandomSleep -eq 0 ]; then
	301	return
	302	fi
	303	if [ -z "$RANDOM" ] ; then
	304	# A fix for shells that do not have this bash feature.
	305	RANDOM=$(dd if=/dev/urandom count=1 2> /dev/null \| cksum \| cut -c"1-5")
	306	fi
	307	TIME=$(($RANDOM % $RandomSleep))
c98870b0	308	debug_echo "sleeping for $TIME seconds"
69c28efc MV	309	sleep $TIME
	310	}
	311
69c28efc	312
ff7c76f8	313	debug_echo()
6cce801a	314	{
ff7c76f8 OA	315	# Display message if $VERBOSE >= 1
	316	if [ "$VERBOSE" -ge 1 ]; then
	317	echo $1 1>&2
6cce801a	318	fi
ff7c76f8 OA	319	}
ff7c76f8 OA	320
c98870b0	321	# ------------------------ main ----------------------------
69c28efc	322
ff7c76f8 OA	323	# check apt-config exstance
ff7c76f8 OA	324	if ! which apt-config >/dev/null ; then
18d38975 OS	325	exit 0
18d38975 OS	326	fi
87ddfb96	327
17443d48 JAK	328	# check if the user really wants to do something
	329	AutoAptEnable=1 # default is yes
	330	eval $(apt-config shell AutoAptEnable APT::Periodic::Enable)
	331
	332	if [ AutoAptEnable -eq 0 ]; then
	333	exit 0
	334	fi
	335
ff7c76f8	336	# Set VERBOSE mode from apt-config (or inherit from environment)
6985efb3	337	VERBOSE=0
ff7c76f8	338	eval $(apt-config shell VERBOSE APT::Periodic::Verbose)
c98870b0	339	debug_echo "verbose level $VERBOSE"
ff7c76f8 OA	340	if [ "$VERBOSE" -le 2 ]; then
	341	# quiet for 0,1,2
	342	XSTDOUT=">/dev/null"
	343	XSTDERR="2>/dev/null"
	344	XAPTOPT="-qq"
	345	XUUPOPT=""
	346	else
	347	XSTDOUT=""
	348	XSTDERR=""
	349	XAPTOPT=""
	350	XUUPOPT="-d"
	351	fi
	352	if [ "$VERBOSE" -ge 3 ]; then
	353	# trace output
	354	set -x
	355	fi
8a139d4d	356
ff7c76f8 OA	357	# laptop check, on_ac_power returns:
	358	# 0 (true) System is on main power
	359	# 1 (false) System is not on main power
	360	# 255 (false) Power status could not be determined
	361	# Desktop systems always return 255 it seems
	362	if which on_ac_power >/dev/null; then
	363	on_ac_power
	364	POWER=$?
	365	if [ $POWER -eq 1 ]; then
c98870b0	366	debug_echo "exit: system NOT on main power"
ff7c76f8 OA	367	exit 0
ff7c76f8 OA	368	elif [ $POWER -ne 0 ]; then
c98870b0	369	debug_echo "power status ($POWER) undetermined, continuing"
6cce801a	370	fi
ff7c76f8 OA	371	debug_echo "system is on main power."
ff7c76f8 OA	372	fi
8a139d4d	373
ff7c76f8	374	# check if we can lock the cache and if the cache is clean
aff278bf	375	if which apt-get >/dev/null && ! eval apt-get check -f $XAPTOPT $XSTDERR ; then
ff7c76f8 OA	376	debug_echo "error encountered in cron job with \"apt-get check\"."
	377	exit 0
	378	fi
8a139d4d	379
ff7c76f8 OA	380	# Global current time in seconds since 1970-01-01 00:00:00 UTC
ff7c76f8 OA	381	now=$(date +%s)
6cce801a	382
ff7c76f8 OA	383	# Support old Archive for compatibility.
ff7c76f8 OA	384	# Document only Periodic for all controling parameters of this script.
ff7c76f8	385
0c132682	386	UpdateInterval=0
ff7c76f8 OA	387	eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists)
ff7c76f8 OA	388
05f6a46a	389	DownloadUpgradeableInterval=0
ff7c76f8	390	eval $(apt-config shell DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
0c132682	391
fdd15654 MV	392	UnattendedUpgradeInterval=0
	393	eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade)
	394
ff7c76f8 OA	395	AutocleanInterval=0
	396	eval $(apt-config shell AutocleanInterval APT::Periodic::AutocleanInterval)
	397
c98870b0 MV	398	BackupArchiveInterval=0
c98870b0 MV	399	eval $(apt-config shell BackupArchiveInterval APT::Periodic::BackupArchiveInterval)
ff7c76f8	400
6b519e42 JAK	401	Debdelta=1
	402	eval $(apt-config shell Debdelta APT::Periodic::Download-Upgradeable-Packages-Debdelta)
	403
4c2dcaa1 MV	404	# check if we actually have to do anything
	405	if [ $UpdateInterval -eq 0 ] &&
	406	[ $DownloadUpgradeableInterval -eq 0 ] &&
	407	[ $UnattendedUpgradeInterval -eq 0 ] &&
2783b261	408	[ $BackupArchiveInterval -eq 0 ] &&
4c2dcaa1 MV	409	[ $AutocleanInterval -eq 0 ]; then
	410	exit 0
	411	fi
fdd15654	412
c98870b0 MV	413	# deal with BackupArchiveInterval
c98870b0 MV	414	do_cache_backup $BackupArchiveInterval
0c132682	415
4c2dcaa1 MV	416	# sleep random amount of time to avoid hitting the
4c2dcaa1 MV	417	# mirrors at the same time
69c28efc MV	418	random_sleep
69c28efc MV	419
ff7c76f8	420	# update package lists
aff278bf	421	UPDATED=0
05f6a46a MZ	422	UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
05f6a46a MZ	423	if check_stamp $UPDATE_STAMP $UpdateInterval; then
ff7c76f8 OA	424	if eval apt-get $XAPTOPT -y update $XSTDERR; then
ff7c76f8 OA	425	debug_echo "download updated metadata (success)."
be993931	426	if which dbus-send >/dev/null && pidof dbus-daemon >/dev/null; then
ff7c76f8 OA	427	if dbus-send --system / app.apt.dbus.updated boolean:true ; then
	428	debug_echo "send dbus signal (success)"
	429	else
	430	debug_echo "send dbus signal (error)"
	431	fi
	432	else
	433	debug_echo "dbus signal not send (command not available)"
05f6a46a	434	fi
ff7c76f8	435	update_stamp $UPDATE_STAMP
aff278bf	436	UPDATED=1
ff7c76f8	437	else
c98870b0	438	debug_echo "download updated metadata (error)"
05f6a46a	439	fi
ff7c76f8 OA	440	else
ff7c76f8 OA	441	debug_echo "download updated metadata (not run)."
fdd15654	442	fi
c98870b0 MV	443
	444	# download all upgradeable packages (if it is requested)
	445	DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
aff278bf	446	if [ $UPDATED -eq 1 ] && check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
6b519e42 JAK	447	if [ $Debdelta -eq 1 ]; then
	448	debdelta-upgrade >/dev/null 2>&1 \|\| true
	449	fi
c98870b0 MV	450	if eval apt-get $XAPTOPT -y -d dist-upgrade $XSTDERR; then
	451	update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
	452	debug_echo "download upgradable (success)"
	453	else
	454	debug_echo "download upgradable (error)"
	455	fi
	456	else
	457	debug_echo "download upgradable (not run)"
	458	fi
	459
	460	# auto upgrade all upgradeable packages
	461	UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
aff278bf	462	if [ $UPDATED -eq 1 ] && which unattended-upgrade >/dev/null && check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then
c98870b0 MV	463	if unattended-upgrade $XUUPOPT; then
	464	update_stamp $UPGRADE_STAMP
	465	debug_echo "unattended-upgrade (success)"
	466	else
	467	debug_echo "unattended-upgrade (error)"
	468	fi
	469	else
	470	debug_echo "unattended-upgrade (not run)"
	471	fi
fdd15654	472
ff7c76f8	473	# autoclean package archive
de15fbae MV	474	AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
de15fbae MV	475	if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
c98870b0	476	if eval apt-get $XAPTOPT -y autoclean $XSTDERR; then
ff7c76f8 OA	477	debug_echo "autoclean (success)."
	478	update_stamp $AUTOCLEAN_STAMP
	479	else
c98870b0	480	debug_echo "autoclean (error)"
ff7c76f8 OA	481	fi
ff7c76f8 OA	482	else
c98870b0	483	debug_echo "autoclean (not run)"
de15fbae MV	484	fi
de15fbae MV	485
0fad7309 MV	486	# check cache size
	487	check_size_constraints
	488
ff7c76f8 OA	489	#
	490	# vim: set sts=4 ai :
	491	#
	492