X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/2288cf77157ae18648ed5643f9f4f4a7f89fb22a..fa3b09450ed3da175f619ca77d9dceb9a6f81972:/debian/apt.cron.daily

diff --git a/debian/apt.cron.daily b/debian/apt.cron.daily
index a97222095..5c5ca88c7 100644
--- a/debian/apt.cron.daily
+++ b/debian/apt.cron.daily
@@ -1,30 +1,205 @@
 #!/bin/sh
 #
-# cron job for apt-get update
+
+#set -e
+#
+# This file understands the following apt configuration variables:
+#
+#  "APT::Periodic::Update-Package-Lists=1"
+#  - Do "apt-get update" automatically every n-days (0=disable)
+#    
+#  "APT::Periodic::Download-Upgradeable-Packages=0",
+#  - Do "apt-get upgrade --download-only" every n-days (0=disable)
+# 
+#  "APT::Periodic::AutocleanInterval"
+#  - Do "apt-get autoclean" every n-days (0=disable)
 #
-# Update-Package-Intervall is in days
+#  "APT::Periodic::Unattended-Upgrade"
+#  - Run the "unattended-upgrade" security upgrade script 
+#    every n-days (0=disabled)
+#    Requires the package "unattended-upgrades" and will write
+#    a log in /var/log/unattended-upgrades
+# 
+#  "APT::Archives::MaxAge",
+#  - Set maximum allowed age of a cache package file. If a cache 
+#    package file is older it is deleted (0=disable)
 #
-STAMP=/var/lib/apt/update-stamp
+#  "APT::Archives::MaxSize",
+#  - Set maximum size of the cache in MB (0=disable). If the cache
+#    is bigger, cached package files are deleted until the size
+#    requirement is met (the biggest packages will be deleted 
+#    first).
+#
+#  "APT::Archives::MinAge"
+#  - Set minimum age of a package file. If a file is younger it
+#    will not be deleted (0=disable). Usefull to prevent races 
+#    and to keep backups of the packages for emergency.
+# 
 
-#set -e
+check_stamp()
+{
+    stamp="$1"
+    interval="$2"
+
+    if [ $interval -eq 0 ]; then
+        return 1
+    fi
+
+    if [ ! -f $stamp ]; then
+        return 0
+    fi
+
+    # compare midnight today to midnight the day the stamp was updated
+    stamp_file="$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-$stamp))
+
+    # intervall is in days,
+    interval=$(($interval*60*60*24))
+    #echo "stampfile: $1"
+    #echo "interval=$interval, now=$now, stamp=$stamp, delta=$delta"
+
+    if [ $delta -ge $interval ]; then
+        return 0
+    fi
+
+    return 1
+}
 
-do_update()
+update_stamp()
 {
-    touch $STAMP.new
-    if apt-get update -qq; then
-	if [ -x /usr/bin/dbus-send ]; then
-	    dbus-send --system / app.apt.dbus.updated boolean:true
-	fi
-        mv $STAMP.new $STAMP
-    fi
-    rm -f $STAMP.new
+    stamp="$1"
+
+    touch $stamp
 }
 
+
+
+# we check here if autoclean was enough sizewise
+check_size_constraints()
+{
+    # min-age in days
+    MaxAge=0
+    MinAge=2
+    MaxSize=0
+    CacheDir="var/cache/apt"
+    CacheArchive="archives/"
+    eval $(apt-config shell MaxAge APT::Archives::MaxAge)
+    eval $(apt-config shell MinAge APT::Archives::MinAge)
+    eval $(apt-config shell MaxSize APT::Archives::MaxSize)
+    eval $(apt-config shell Dir Dir)
+    eval $(apt-config shell CacheDir Dir::Cache)
+    eval $(apt-config shell CacheArchive Dir::Cache::archives)
+
+    # sanity check
+    if [ -z "$CacheDir" -o -z "$CacheArchive" ]; then
+	echo "empty Dir::Cache or Dir::Cache::archives, exiting"
+	exit
+    fi
+    
+    Cache="${Dir%/}/${CacheDir%/}/${CacheArchive%/}/"
+
+    # check age
+    if [ ! $MaxAge -eq 0 ] && [ ! $MinAge -eq 0 ]; then
+	find $Cache -name "*.deb"  \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 | xargs -r -0 rm -f
+    elif [ ! $MaxAge -eq 0 ]; then
+	find $Cache -name "*.deb"  -ctime +$MaxAge -and -mtime +$MaxAge -print0 | xargs -r -0 rm -f
+    fi
+    
+    # check size
+    if [ ! $MaxSize -eq 0 ]; then
+	# maxSize is in MB
+	MaxSize=$(($MaxSize*1024))
+
+	#get current time
+	now=$(date --date=$(date --iso-8601) +%s)
+	MinAge=$(($MinAge*24*60*60))
+
+	# reverse-sort by mtime
+	for file in $(ls -rt $Cache/*.deb 2>/dev/null); do 
+	    du=$(du -s $Cache)
+	    size=${du%%/*}
+	    # check if the cache is small enough
+	    if [ $size -lt $MaxSize ]; then
+		break
+	    fi
+
+	    # check for MinAge of the file
+	    if [ ! $MinAge -eq 0 ]; then 
+		# check both ctime and mtime 
+		mtime=$(stat -c %Y $file)
+		ctime=$(stat -c %Z $file)
+		if [ $mtime -gt $ctime ]; then
+		    delta=$(($now-$mtime))
+		else
+		    delta=$(($now-$ctime))
+		fi
+		#echo "$file ($delta), $MinAge"
+		if [ $delta -le $MinAge ]; then
+		    #echo "Skiping $file (delta=$delta)"
+		    break
+		fi
+	    fi
+
+	    # delete oldest file
+	    rm -f $file
+	done
+    fi
+}
+
+# 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))
+    sleep $TIME
+}
+
+# main
+
+if ! which apt-config >/dev/null; then
+	exit 0
+fi
+
 UpdateInterval=0
-RES=`apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists`
-eval $RES
+DownloadUpgradeableInterval=0
+eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
+AutocleanInterval=$DownloadUpgradeableInterval
+eval $(apt-config shell AutocleanInterval APT::Periodic::AutocleanInterval)
+UnattendedUpgradeInterval=0
+eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade)
 
-if [ $UpdateInterval -eq 0 ]; then
+# check if we actually have to do anything
+if [ $UpdateInterval -eq 0 ] &&
+   [ $DownloadUpgradeableInterval -eq 0 ] &&
+   [ $UnattendedUpgradeInterval -eq 0 ] &&
+   [ $AutocleanInterval -eq 0 ]; then
     exit 0
 fi
 
@@ -34,21 +209,55 @@ fi
 #       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 
+    on_ac_power
     if [ $? -eq 1 ]; then
 	exit 0
     fi
 fi
 
-if [ ! -f $STAMP ]; then
-    do_update
-    exit 0
+# sleep random amount of time to avoid hitting the 
+# mirrors at the same time
+random_sleep
+
+# check if we can access the cache
+if ! apt-get check -q -q 2>/dev/null; then
+    # wait random amount of time before retrying
+    random_sleep
+    # check again
+    if ! apt-get check -q -q 2>/dev/null; then
+	echo "$0: could not lock the APT cache while performing daily cron job. "
+	echo "Is another package manager working?"
+	exit 1
+    fi
 fi
 
-LastUpdate=`stat -c "%Y" $STAMP 2>/dev/null` 
-Now=`date +%s`
+UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
+if check_stamp $UPDATE_STAMP $UpdateInterval; then
+    if apt-get -qq update 2>/dev/null; then
+        if which dbus-send >/dev/null && pidof dbus-daemon >/dev/null; then
+            dbus-send --system / app.apt.dbus.updated boolean:true
+        fi
+        update_stamp $UPDATE_STAMP
+    fi
+fi
+
+DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
+if check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
+    apt-get -qq -d dist-upgrade 2>/dev/null
+    update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
+fi
 
-NeedUpdate=$(($LastUpdate+$UpdateInterval*3600*24))
-if [ $NeedUpdate -le $Now ]; then
-    do_update
+UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
+if check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then
+    unattended-upgrade
+    update_stamp $UPGRADE_STAMP
 fi
+
+AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
+if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
+    apt-get -qq autoclean
+    update_stamp $AUTOCLEAN_STAMP
+fi
+
+# check cache size 
+check_size_constraints