debian/apt.cron.daily

   1 #!/bin/sh
   2 #set -e
   3 #
   4 # This file understands the following apt configuration variables:
   5 # Values here are the default.
   6 # Create /etc/apt/apt.conf.d/02periodic file to set your preference.
   7 #
   8 #  Dir "/";
   9 #  - RootDir for all configuration files
  10 #
  11 #  Dir::Cache "var/apt/cache/";
  12 #  - Set apt package cache directory
  13 #
  14 #  Dir::Cache::Archive "archives/";
  15 #  - Set package archive directory
  16 #
  17 #  APT::Periodic::BackupArchiveInterval "0";
  18 #  - Backup after n-days if archive contents changed.(0=disable)
  19 #
  20 #  APT::Periodic::BackupLevel "3";
  21 #  - Backup level.(0=disable), 1 is invalid.
  22 #
  23 #  Dir::Cache::Backup "backup/";
  24 #  - Set periodic package backup directory
  25 #
  26 #  APT::Archives::MaxAge "0"; (old, deprecated)
  27 #  APT::Periodic::MaxAge "0"; (new)
  28 #  - Set maximum allowed age of a cache package file. If a cache
  29 #    package file is older it is deleted (0=disable)
  30 #
  31 #  APT::Archives::MinAge "2"; (old, deprecated)
  32 #  APT::Periodic::MinAge "2"; (new)
  33 #  - Set minimum age of a package file. If a file is younger it
  34 #    will not be deleted (0=disable). Usefull to prevent races
  35 #    and to keep backups of the packages for emergency.
  36 #
  37 #  APT::Archives::MaxSize "0"; (old, deprecated)
  38 #  APT::Periodic::MaxSize "0"; (new)
  39 #  - Set maximum size of the cache in MB (0=disable). If the cache
  40 #    is bigger, cached package files are deleted until the size
  41 #    requirement is met (the biggest packages will be deleted
  42 #    first).
  43 #
  44 #  APT::Periodic::Update-Package-Lists "0";
  45 #  - Do "apt-get update" automatically every n-days (0=disable)
  46 #
  47 #  APT::Periodic::Download-Upgradeable-Packages "0";
  48 #  - Do "apt-get upgrade --download-only" every n-days (0=disable)
  49 #
  50 #  APT::Periodic::Unattended-Upgrade "0";
  51 #  - Run the "unattended-upgrade" security upgrade script
  52 #    every n-days (0=disabled)
  53 #    Requires the package "unattended-upgrades" and will write
  54 #    a log in /var/log/unattended-upgrades
  55 #
  56 #  APT::Periodic::AutocleanInterval "0";
  57 #  - Do "apt-get autoclean" every n-days (0=disable)
  58 #
  59 #  APT::Periodic::Verbose "0";
  60 #  - Send report mail to root
  61 #      0:  no report             (or null string)
  62 #      1:  progress report       (actually any string)
  63 #      2:  + command outputs     (remove -qq, remove 2>/dev/null, add -d)
  64 #      3:  + trace on
  65
  66 check_stamp()
  67 {
  68     stamp="$1"
  69     interval="$2"
  70
  71     if [ $interval -eq 0 ]; then
  72         debug_echo "check_stamp: interval=0."
  73         # treat as no time has passed
  74         return 1
  75     fi
  76
  77     if [ ! -f $stamp ]; then
  78         update_stamp $stamp
  79         debug_echo "check_stamp: missing time stamp file: $stamp."
  80         # treat as enough time has passed
  81         return 0
  82     fi
  83
  84     # compare midnight today to midnight the day the stamp was updated
  85     stamp=$(date -r $stamp '+%s')
  86     delta=$(($now-$stamp))
  87
  88     # intervall is in days, convert to sec.
  89     interval=$(($interval*60*60*24))
  90     debug_echo "check_stamp: interval=$interval, now=$now, stamp=$stamp, delta=$delta (sec)"
  91
  92     if [ $delta -ge $interval ]; then
  93         return 0
  94     fi
  95
  96     return 1
  97 }
  98
  99 update_stamp()
 100 {
 101     stamp="$1"
 102     touch $stamp
 103 }
 104
 105 debug_echo()
 106 {
 107     # Display message if $VERBOSE >= 1
 108     if [ "$VERBOSE" -ge 1 ]; then
 109         echo $1 1>&2
 110     fi
 111 }
 112
 113 # check apt-config exstance
 114 if ! which apt-config >/dev/null ; then
 115         exit 0
 116 fi
 117
 118 # Set VERBOSE mode from  apt-config (or inherit from environment)
 119 eval $(apt-config shell VERBOSE APT::Periodic::Verbose)
 120 if [ -z "$VERBOSE" ]; then
 121     VERBOSE="0"
 122 fi
 123 if [ "$VERBOSE" -le 2 ]; then
 124     # quiet for 0,1,2
 125     XSTDOUT=">/dev/null"
 126     XSTDERR="2>/dev/null"
 127     XAPTOPT="-qq"
 128     XUUPOPT=""
 129 else
 130     XSTDOUT=""
 131     XSTDERR=""
 132     XAPTOPT=""
 133     XUUPOPT="-d"
 134 fi
 135 if [ "$VERBOSE" -ge 3 ]; then
 136     # trace output
 137     set -x
 138 fi
 139 # laptop check, on_ac_power returns:
 140 #       0 (true)    System is on main power
 141 #       1 (false)   System is not on main power
 142 #       255 (false) Power status could not be determined
 143 # Desktop systems always return 255 it seems
 144 if which on_ac_power >/dev/null; then
 145     on_ac_power
 146     POWER=$?
 147     if [ $POWER -eq 1 ]; then
 148         debug_echo "exit: system on main power."
 149         exit 0
 150     elif [ $POWER -ne 0 ]; then
 151         debug_echo "exit: power status ($POWER) undetermined."
 152         exit 0
 153     fi
 154     debug_echo "system is on main power."
 155 fi
 156
 157 # check if we can lock the cache and if the cache is clean
 158 if which apt-get >/dev/null && ! eval apt-get check $XAPTOPT $XSTDERR ; then
 159     debug_echo "error encountered in cron job with \"apt-get check\"."
 160     exit 0
 161 fi
 162 # No need to check for apt-get below
 163
 164 # Global current time in seconds since 1970-01-01 00:00:00 UTC
 165 now=$(date +%s)
 166
 167 # Set default values and normalize
 168 Dir="/"
 169 eval $(apt-config shell Dir Dir)
 170 Dir=${Dir%/}
 171
 172 CacheDir="var/cache/apt/"
 173 eval $(apt-config shell CacheDir Dir::Cache)
 174 CacheDir=${CacheDir%/}
 175 if [ -z "$CacheDir" ]; then
 176     debug_echo "practically empty Dir::Cache, exiting"
 177     exit 0
 178 fi
 179
 180 CacheArchive="archives/"
 181 eval $(apt-config shell CacheArchive Dir::Cache::Archives)
 182 CacheArchive=${CacheArchive%/}
 183 if [ -z "$CacheArchive" ]; then
 184     debug_echo "practically empty Dir::Cache::archives, exiting"
 185     exit 0
 186 fi
 187
 188 BackupArchiveInterval=0
 189 eval $(apt-config shell BackupArchiveInterval APT::Periodic::BackupArchiveInterval)
 190
 191 BackupLevel=3
 192 eval $(apt-config shell BackupLevel APT::Periodic::BackupLevel)
 193 if [ $BackupLevel -le 1 ]; then BackupLevel=2 ; fi
 194
 195 CacheBackup="backup/"
 196 eval $(apt-config shell CacheBackup Dir::Cache::Backup)
 197 CacheBackup=${CacheBackup%/}
 198 if [ -z "$CacheBackup" ]; then
 199     echo "practically empty Dir::Cache::Backup, exiting" 1>&2
 200     exit 0
 201 fi
 202
 203 # Support old Archive for compatibility.
 204 # Document only Periodic for all controling parameters of this script.
 205 MaxAge=0
 206 eval $(apt-config shell MaxAge APT::Archives::MaxAge)
 207 eval $(apt-config shell MaxAge APT::Periodic::MaxAge)
 208
 209 MinAge=2
 210 eval $(apt-config shell MinAge APT::Archives::MinAge)
 211 eval $(apt-config shell MinAge APT::Periodic::MinAge)
 212
 213 MaxSize=0
 214 eval $(apt-config shell MaxSize APT::Archives::MaxSize)
 215 eval $(apt-config shell MaxSize APT::Periodic::MaxSize)
 216
 217 UpdateInterval=0
 218 eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists)
 219
 220 DownloadUpgradeableInterval=0
 221 eval $(apt-config shell DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
 222
 223 UnattendedUpgradeInterval=0
 224 eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade)
 225
 226 AutocleanInterval=0
 227 eval $(apt-config shell AutocleanInterval APT::Periodic::AutocleanInterval)
 228
 229 Cache="${Dir}/${CacheDir}/${CacheArchive}/"
 230 Back="${Dir}/${CacheDir}/${CacheBackup}/"
 231 BackX="${Back}${CacheArchive}/"
 232 for x in $(seq 0 1 $((${BackupLevel}-1))); do
 233     eval "Back${x}=${Back}${x}/"
 234 done
 235
 236 # backup after n-days if archive contents changed.
 237 # (This uses hardlink to save disk space)
 238 BACKUP_ARCHIVE_STAMP=/var/lib/apt/periodic/backup-archive-stamp
 239 if check_stamp $BACKUP_ARCHIVE_STAMP $BackupArchiveInterval; then
 240     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
 241         mkdir -p $Back
 242         rm -rf $Back$((${BackupLevel}-1))
 243         for y in $(seq $((${BackupLevel}-1)) -1 1); do
 244             eval BackY=${Back}$y
 245             eval BackZ=${Back}$(($y-1))
 246             if [ -e $BackZ ]; then mv -f $BackZ $BackY ; fi
 247         done
 248         cp -la $Cache $Back ; mv -f $BackX $Back0
 249         update_stamp $BACKUP_ARCHIVE_STAMP
 250         debug_echo "backup with hardlinks. (success)"
 251     else
 252
 253         debug_echo "skip backup since same content."
 254     fi
 255 else
 256         debug_echo "skip backup since too new."
 257 fi
 258
 259 # package archive contnts removal by package age
 260 if [ $MaxAge -ne 0 ] && [ $MinAge -ne 0 ]; then
 261     find $Cache -name "*.deb"  \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 | xargs -r -0 rm -f
 262     debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge and ctime>$MinAge and mtime>$MinAge"
 263 elif [ $MaxAge -ne 0 ]; then
 264     find $Cache -name "*.deb"  -ctime +$MaxAge -and -mtime +$MaxAge -print0 | xargs -r -0 rm -f
 265     debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge only"
 266 else
 267     debug_echo "skip aging since MaxAge is 0"
 268 fi
 269
 270 # package archive contnts removal down to $MaxSize
 271 if [ $MaxSize -ne 0 ]; then
 272
 273     MinAgeSec=$(($MinAge*24*60*60))
 274
 275     # reverse-sort by mtime
 276     for file in $(ls -rt $Cache/*.deb 2>/dev/null); do
 277         du=$(du -m -s $Cache)
 278         size=${du%%/*}
 279         # check if the cache is small enough
 280         if [ $size -lt $MaxSize ]; then
 281             debug_echo "end remove by archive size:  size=$size < $MaxSize"
 282             break
 283         fi
 284
 285         # check for MinAge in second of the file
 286         if [ $MinAgeSec -ne 0 ]; then
 287             # check both ctime and mtime
 288             mtime=$(stat -c %Y $file)
 289             ctime=$(stat -c %Z $file)
 290             if [ $mtime -gt $ctime ]; then
 291                 delta=$(($now-$mtime))
 292             else
 293                 delta=$(($now-$ctime))
 294             fi
 295             if [ $delta -le $MinAgeSec ]; then
 296                 debug_echo "skip remove by archive size:  $file, delta=$delta < $MinAgeSec"
 297             else
 298                 # delete oldest file
 299                 debug_echo "remove by archive size: $file, delta=$delta >= $MinAgeSec (sec), size=$size >= $MaxSize"
 300                 rm -f $file
 301             fi
 302         fi
 303
 304     done
 305 fi
 306
 307 # update package lists
 308 UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
 309 if check_stamp $UPDATE_STAMP $UpdateInterval; then
 310     if eval apt-get $XAPTOPT -y update $XSTDERR; then
 311         debug_echo "download updated metadata (success)."
 312         if which dbus-send >/dev/null; then
 313             if dbus-send --system / app.apt.dbus.updated boolean:true ; then
 314                 debug_echo "send dbus signal (success)"
 315             else
 316                 debug_echo "send dbus signal (error)"
 317             fi
 318         else
 319             debug_echo "dbus signal not send (command not available)"
 320         fi
 321         update_stamp $UPDATE_STAMP
 322         # download all upgradeable packages if it is requested
 323         DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
 324         if check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
 325             if eval apt-get $XAPTOPT -y -d dist-upgrade $XSTDERR; then
 326                 update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
 327                 debug_echo "download upgradable (success)."
 328                 # auto upgrade all upgradeable packages
 329                 UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
 330                 if which unattended-upgrade >/dev/null && check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then
 331                     if unattended-upgrade $XUUPOPT; then
 332                         update_stamp $UPGRADE_STAMP
 333                         debug_echo "unattended-upgrade (success)."
 334                     else
 335                         debug_echo "unattended-upgrade (error)."
 336                     fi
 337                 else
 338                     debug_echo "unattended-upgrade (not run)."
 339                 fi
 340             else
 341                 debug_echo "download upgradable (error)."
 342             fi
 343         else
 344             debug_echo "download upgradable (not run)."
 345         fi
 346     else
 347         debug_echo "download updated metadata (error)."
 348     fi
 349 else
 350     debug_echo "download updated metadata (not run)."
 351 fi
 352
 353 # autoclean package archive
 354 AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
 355 if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
 356     if apt-get $XAPTOPT -y autoclean $XSTDERR; then
 357         debug_echo "autoclean (success)."
 358         update_stamp $AUTOCLEAN_STAMP
 359     else
 360         debug_echo "autoclean (error)."
 361     fi
 362 else
 363     debug_echo "autoclean (not run)."
 364 fi
 365
 366 #
 367 #     vim: set sts=4 ai :
 368 #
 369