[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::Archives "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)

    Cache="/var/cache/apt/archives/"
    eval $(apt-config shell Cache Dir::Cache::archives/d)

    # sanity check
    if [ -z "$Cache" ]; then
	echo "empty Dir::Cache::archives, exiting"
	exit
    fi

    # 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
    CacheDir="/var/cache/apt"
    eval $(apt-config shell CacheDir Dir::Cache/d)
    CacheDir=${CacheDir%/}
    if [ -z "$CacheDir" ]; then
	debug_echo "practically empty Dir::Cache, exiting"
	return 0
    fi

    Cache="${CacheDir}/archives/"
    eval $(apt-config shell Cache Dir::Cache::Archives/d)
    if [ -z "$Cache" ]; 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
    
    Back="${CacheDir}/backup/"
    eval $(apt-config shell Back Dir::Cache::Backup/d)
    if [ -z "$Back" ]; then
	echo "practically empty Dir::Cache::Backup, exiting" 1>&2
	return
    fi

    CacheArchive="$(basename "${Cache}")"
    test -n "${CacheArchive}" || CacheArchive="archives"
    BackX="${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
}

check_power(){
    # 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"
	    return 1
        elif [ $POWER -ne 0 ]; then
	    debug_echo "power status ($POWER) undetermined, continuing"
        fi
        debug_echo "system is on main power."
    fi
    return 0
}

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

# Backup the 7 last versions of APT's extended_states file
# shameless copy from dpkg cron
if cd /var/backups ; then
    if ! cmp -s apt.extended_states.0 /var/lib/apt/extended_states; then
	cp -p /var/lib/apt/extended_states apt.extended_states
	savelog -c 7 apt.extended_states >/dev/null
    fi
fi

# 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

check_power || exit 0

# 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 that requires locking the cache
if [ $UpdateInterval -eq 0 ] &&
   [ $DownloadUpgradeableInterval -eq 0 ] &&
   [ $UnattendedUpgradeInterval -eq 0 ] &&
   [ $BackupArchiveInterval -eq 0 ] &&
   [ $AutocleanInterval -eq 0 ]; then

    # check cache size
    check_size_constraints

    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
check_power || exit 0

# include default system language so that "apt-get update" will
# fetch the right translated package descriptions
if [ -r /etc/default/locale ]; then
    . /etc/default/locale
    export LANG LANGUAGE LC_MESSAGES LC_ALL
fi

# 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 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	#
c1cde32e	14	# Dir::Cache::Archives "archives/";
ff7c76f8 OA	15	# - Set package archive directory
ff7c76f8 OA	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)
c98870b0 MV	149
c1cde32e DK	150	Cache="/var/cache/apt/archives/"
c1cde32e DK	151	eval $(apt-config shell Cache Dir::Cache::archives/d)
6cce801a MV	152
6cce801a MV	153	# sanity check
c1cde32e DK	154	if [ -z "$Cache" ]; then
c1cde32e DK	155	echo "empty Dir::Cache::archives, exiting"
6cce801a MV	156	exit
6cce801a MV	157	fi
6cce801a MV	158
6cce801a MV	159	# check age
8a139d4d	160	if [ ! $MaxAge -eq 0 ] && [ ! $MinAge -eq 0 ]; then
c98870b0	161	debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge and ctime>$MinAge and mtime>$MinAge"
8e29e348	162	find $Cache -name "*.deb" \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 \| xargs -r -0 rm -f
8a139d4d	163	elif [ ! $MaxAge -eq 0 ]; then
c98870b0	164	debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge only"
8e29e348	165	find $Cache -name "*.deb" -ctime +$MaxAge -and -mtime +$MaxAge -print0 \| xargs -r -0 rm -f
c98870b0 MV	166	else
c98870b0 MV	167	debug_echo "skip aging since MaxAge is 0"
6cce801a MV	168	fi
	169
	170	# check size
	171	if [ ! $MaxSize -eq 0 ]; then
8a139d4d MV	172	# maxSize is in MB
	173	MaxSize=$(($MaxSize*1024))
	174
	175	#get current time
	176	now=$(date --date=$(date --iso-8601) +%s)
	177	MinAge=$(($MinAge2460*60))
	178
6cce801a	179	# reverse-sort by mtime
3408b58c	180	for file in $(ls -rt $Cache/*.deb 2>/dev/null); do
6cce801a MV	181	du=$(du -s $Cache)
	182	size=${du%%/*}
	183	# check if the cache is small enough
	184	if [ $size -lt $MaxSize ]; then
c98870b0	185	debug_echo "end remove by archive size: size=$size < $MaxSize"
6cce801a MV	186	break
6cce801a MV	187	fi
8a139d4d MV	188
8a139d4d MV	189	# check for MinAge of the file
c98870b0	190	if [ $MinAge -ne 0 ]; then
8e29e348	191	# check both ctime and mtime
3971f8e8	192	mtime=$(stat -c %Y $file)
8e29e348 MV	193	ctime=$(stat -c %Z $file)
	194	if [ $mtime -gt $ctime ]; then
	195	delta=$(($now-$mtime))
	196	else
	197	delta=$(($now-$ctime))
	198	fi
8a139d4d	199	if [ $delta -le $MinAge ]; then
c98870b0	200	debug_echo "skip remove by archive size: $file, delta=$delta < $MinAgeSec"
3408b58c	201	break
c98870b0 MV	202	else
	203	# delete oldest file
	204	debug_echo "remove by archive size: $file, delta=$delta >= $MinAgeSec (sec), size=$size >= $MaxSize"
	205	rm -f $file
8a139d4d MV	206	fi
8a139d4d MV	207	fi
6cce801a MV	208	done
	209	fi
	210	}
	211
c98870b0 MV	212	# deal with the Apt::Periodic::BackupArchiveInterval
	213	do_cache_backup()
	214	{
	215	BackupArchiveInterval="$1"
	216	if [ $BackupArchiveInterval -eq 0 ]; then
	217	return
	218	fi
	219
	220	# Set default values and normalize
c1cde32e DK	221	CacheDir="/var/cache/apt"
c1cde32e DK	222	eval $(apt-config shell CacheDir Dir::Cache/d)
c98870b0 MV	223	CacheDir=${CacheDir%/}
	224	if [ -z "$CacheDir" ]; then
	225	debug_echo "practically empty Dir::Cache, exiting"
	226	return 0
	227	fi
	228
c1cde32e DK	229	Cache="${CacheDir}/archives/"
	230	eval $(apt-config shell Cache Dir::Cache::Archives/d)
	231	if [ -z "$Cache" ]; then
c98870b0 MV	232	debug_echo "practically empty Dir::Cache::archives, exiting"
	233	return 0
	234	fi
	235
	236	BackupLevel=3
	237	eval $(apt-config shell BackupLevel APT::Periodic::BackupLevel)
	238	if [ $BackupLevel -le 1 ]; then
	239	BackupLevel=2 ;
	240	fi
	241
c1cde32e DK	242	Back="${CacheDir}/backup/"
	243	eval $(apt-config shell Back Dir::Cache::Backup/d)
	244	if [ -z "$Back" ]; then
c98870b0 MV	245	echo "practically empty Dir::Cache::Backup, exiting" 1>&2
	246	return
	247	fi
	248
c1cde32e DK	249	CacheArchive="$(basename "${Cache}")"
c1cde32e DK	250	test -n "${CacheArchive}" \|\| CacheArchive="archives"
c98870b0 MV	251	BackX="${Back}${CacheArchive}/"
	252	for x in $(seq 0 1 $((${BackupLevel}-1))); do
	253	eval "Back${x}=${Back}${x}/"
	254	done
	255
	256	# backup after n-days if archive contents changed.
	257	# (This uses hardlink to save disk space)
	258	BACKUP_ARCHIVE_STAMP=/var/lib/apt/periodic/backup-archive-stamp
	259	if check_stamp $BACKUP_ARCHIVE_STAMP $BackupArchiveInterval; then
	260	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
	261	mkdir -p $Back
	262	rm -rf $Back$((${BackupLevel}-1))
	263	for y in $(seq $((${BackupLevel}-1)) -1 1); do
	264	eval BackY=${Back}$y
	265	eval BackZ=${Back}$(($y-1))
	266	if [ -e $BackZ ]; then
	267	mv -f $BackZ $BackY ;
	268	fi
	269	done
	270	cp -la $Cache $Back ; mv -f $BackX $Back0
	271	update_stamp $BACKUP_ARCHIVE_STAMP
	272	debug_echo "backup with hardlinks. (success)"
	273	else
	274	debug_echo "skip backup since same content."
	275	fi
	276	else
	277	debug_echo "skip backup since too new."
	278	fi
	279	}
	280
d047c6da	281	# sleep for a random interval of time (default 30min)
69c28efc MV	282	# (some code taken from cron-apt, thanks)
	283	random_sleep()
	284	{
	285	RandomSleep=1800
	286	eval $(apt-config shell RandomSleep APT::Periodic::RandomSleep)
	287	if [ $RandomSleep -eq 0 ]; then
	288	return
	289	fi
	290	if [ -z "$RANDOM" ] ; then
	291	# A fix for shells that do not have this bash feature.
	292	RANDOM=$(dd if=/dev/urandom count=1 2> /dev/null \| cksum \| cut -c"1-5")
	293	fi
	294	TIME=$(($RANDOM % $RandomSleep))
c98870b0	295	debug_echo "sleeping for $TIME seconds"
69c28efc MV	296	sleep $TIME
	297	}
	298
69c28efc	299
ff7c76f8	300	debug_echo()
6cce801a	301	{
ff7c76f8 OA	302	# Display message if $VERBOSE >= 1
	303	if [ "$VERBOSE" -ge 1 ]; then
	304	echo $1 1>&2
6cce801a	305	fi
ff7c76f8 OA	306	}
ff7c76f8 OA	307
e20d3bcf JAK	308	check_power(){
	309	# laptop check, on_ac_power returns:
	310	# 0 (true) System is on main power
	311	# 1 (false) System is not on main power
	312	# 255 (false) Power status could not be determined
	313	# Desktop systems always return 255 it seems
	314	if which on_ac_power >/dev/null; then
	315	on_ac_power
	316	POWER=$?
	317	if [ $POWER -eq 1 ]; then
	318	debug_echo "exit: system NOT on main power"
	319	return 1
	320	elif [ $POWER -ne 0 ]; then
	321	debug_echo "power status ($POWER) undetermined, continuing"
	322	fi
	323	debug_echo "system is on main power."
	324	fi
	325	return 0
	326	}
	327
c98870b0	328	# ------------------------ main ----------------------------
69c28efc	329
a23a7811 DK	330	# Backup the 7 last versions of APT's extended_states file
	331	# shameless copy from dpkg cron
	332	if cd /var/backups ; then
	333	if ! cmp -s apt.extended_states.0 /var/lib/apt/extended_states; then
	334	cp -p /var/lib/apt/extended_states apt.extended_states
	335	savelog -c 7 apt.extended_states >/dev/null
	336	fi
	337	fi
	338
ff7c76f8 OA	339	# check apt-config exstance
ff7c76f8 OA	340	if ! which apt-config >/dev/null ; then
18d38975 OS	341	exit 0
18d38975 OS	342	fi
87ddfb96	343
17443d48 JAK	344	# check if the user really wants to do something
	345	AutoAptEnable=1 # default is yes
	346	eval $(apt-config shell AutoAptEnable APT::Periodic::Enable)
	347
9a64707c	348	if [ $AutoAptEnable -eq 0 ]; then
17443d48 JAK	349	exit 0
	350	fi
	351
ff7c76f8	352	# Set VERBOSE mode from apt-config (or inherit from environment)
6985efb3	353	VERBOSE=0
ff7c76f8	354	eval $(apt-config shell VERBOSE APT::Periodic::Verbose)
c98870b0	355	debug_echo "verbose level $VERBOSE"
ff7c76f8 OA	356	if [ "$VERBOSE" -le 2 ]; then
	357	# quiet for 0,1,2
	358	XSTDOUT=">/dev/null"
	359	XSTDERR="2>/dev/null"
	360	XAPTOPT="-qq"
	361	XUUPOPT=""
	362	else
	363	XSTDOUT=""
	364	XSTDERR=""
	365	XAPTOPT=""
	366	XUUPOPT="-d"
	367	fi
	368	if [ "$VERBOSE" -ge 3 ]; then
	369	# trace output
	370	set -x
	371	fi
8a139d4d	372
e20d3bcf	373	check_power \|\| exit 0
8a139d4d	374
ff7c76f8	375	# check if we can lock the cache and if the cache is clean
aff278bf	376	if which apt-get >/dev/null && ! eval apt-get check -f $XAPTOPT $XSTDERR ; then
ff7c76f8 OA	377	debug_echo "error encountered in cron job with \"apt-get check\"."
	378	exit 0
	379	fi
8a139d4d	380
ff7c76f8 OA	381	# Global current time in seconds since 1970-01-01 00:00:00 UTC
ff7c76f8 OA	382	now=$(date +%s)
6cce801a	383
ff7c76f8 OA	384	# Support old Archive for compatibility.
ff7c76f8 OA	385	# Document only Periodic for all controling parameters of this script.
ff7c76f8	386
0c132682	387	UpdateInterval=0
ff7c76f8 OA	388	eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists)
ff7c76f8 OA	389
05f6a46a	390	DownloadUpgradeableInterval=0
ff7c76f8	391	eval $(apt-config shell DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
0c132682	392
fdd15654 MV	393	UnattendedUpgradeInterval=0
	394	eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade)
	395
ff7c76f8 OA	396	AutocleanInterval=0
	397	eval $(apt-config shell AutocleanInterval APT::Periodic::AutocleanInterval)
	398
c98870b0 MV	399	BackupArchiveInterval=0
c98870b0 MV	400	eval $(apt-config shell BackupArchiveInterval APT::Periodic::BackupArchiveInterval)
ff7c76f8	401
6b519e42 JAK	402	Debdelta=1
	403	eval $(apt-config shell Debdelta APT::Periodic::Download-Upgradeable-Packages-Debdelta)
	404
879cbcc8	405	# check if we actually have to do anything that requires locking the cache
4c2dcaa1 MV	406	if [ $UpdateInterval -eq 0 ] &&
	407	[ $DownloadUpgradeableInterval -eq 0 ] &&
	408	[ $UnattendedUpgradeInterval -eq 0 ] &&
2783b261	409	[ $BackupArchiveInterval -eq 0 ] &&
4c2dcaa1	410	[ $AutocleanInterval -eq 0 ]; then
879cbcc8 DK	411
	412	# check cache size
	413	check_size_constraints
	414
4c2dcaa1 MV	415	exit 0
4c2dcaa1 MV	416	fi
fdd15654	417
c98870b0 MV	418	# deal with BackupArchiveInterval
c98870b0 MV	419	do_cache_backup $BackupArchiveInterval
0c132682	420
4c2dcaa1 MV	421	# sleep random amount of time to avoid hitting the
4c2dcaa1 MV	422	# mirrors at the same time
69c28efc	423	random_sleep
e20d3bcf	424	check_power \|\| exit 0
69c28efc	425
966a4c53 MV	426	# include default system language so that "apt-get update" will
	427	# fetch the right translated package descriptions
	428	if [ -r /etc/default/locale ]; then
	429	. /etc/default/locale
6e239830	430	export LANG LANGUAGE LC_MESSAGES LC_ALL
966a4c53 MV	431	fi
966a4c53 MV	432
ff7c76f8	433	# update package lists
aff278bf	434	UPDATED=0
05f6a46a MZ	435	UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
05f6a46a MZ	436	if check_stamp $UPDATE_STAMP $UpdateInterval; then
ff7c76f8 OA	437	if eval apt-get $XAPTOPT -y update $XSTDERR; then
ff7c76f8 OA	438	debug_echo "download updated metadata (success)."
be993931	439	if which dbus-send >/dev/null && pidof dbus-daemon >/dev/null; then
ff7c76f8 OA	440	if dbus-send --system / app.apt.dbus.updated boolean:true ; then
	441	debug_echo "send dbus signal (success)"
	442	else
	443	debug_echo "send dbus signal (error)"
	444	fi
	445	else
	446	debug_echo "dbus signal not send (command not available)"
05f6a46a	447	fi
ff7c76f8	448	update_stamp $UPDATE_STAMP
aff278bf	449	UPDATED=1
ff7c76f8	450	else
c98870b0	451	debug_echo "download updated metadata (error)"
05f6a46a	452	fi
ff7c76f8 OA	453	else
ff7c76f8 OA	454	debug_echo "download updated metadata (not run)."
fdd15654	455	fi
c98870b0 MV	456
	457	# download all upgradeable packages (if it is requested)
	458	DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
aff278bf	459	if [ $UPDATED -eq 1 ] && check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
6b519e42 JAK	460	if [ $Debdelta -eq 1 ]; then
	461	debdelta-upgrade >/dev/null 2>&1 \|\| true
	462	fi
c98870b0 MV	463	if eval apt-get $XAPTOPT -y -d dist-upgrade $XSTDERR; then
	464	update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
	465	debug_echo "download upgradable (success)"
	466	else
	467	debug_echo "download upgradable (error)"
	468	fi
	469	else
	470	debug_echo "download upgradable (not run)"
	471	fi
	472
	473	# auto upgrade all upgradeable packages
	474	UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
c996a75c	475	if which unattended-upgrade >/dev/null && check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then
c98870b0 MV	476	if unattended-upgrade $XUUPOPT; then
	477	update_stamp $UPGRADE_STAMP
	478	debug_echo "unattended-upgrade (success)"
	479	else
	480	debug_echo "unattended-upgrade (error)"
	481	fi
	482	else
	483	debug_echo "unattended-upgrade (not run)"
	484	fi
fdd15654	485
ff7c76f8	486	# autoclean package archive
de15fbae MV	487	AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
de15fbae MV	488	if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
c98870b0	489	if eval apt-get $XAPTOPT -y autoclean $XSTDERR; then
ff7c76f8 OA	490	debug_echo "autoclean (success)."
	491	update_stamp $AUTOCLEAN_STAMP
	492	else
c98870b0	493	debug_echo "autoclean (error)"
ff7c76f8 OA	494	fi
ff7c76f8 OA	495	else
c98870b0	496	debug_echo "autoclean (not run)"
de15fbae MV	497	fi
de15fbae MV	498
0fad7309 MV	499	# check cache size
	500	check_size_constraints
	501
ff7c76f8 OA	502	#
	503	# vim: set sts=4 ai :
	504	#
	505