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::Enable "1";
  18 #  - Enable the update/upgrade script (0=disable)
  19 #
  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)
  31 #  - Set maximum allowed age of a cache package file. If a cache
  32 #    package file is older it is deleted (0=disable)
  33 #
  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)
  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 #
  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)
  52 #
  53 #  APT::Periodic::Download-Upgradeable-Packages-Debdelta "1";
  54 #  - Use debdelta-upgrade to download updates if available (0=disable)
  55 #
  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
  61 #
  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
  71
  72 check_stamp()
  73 {
  74     stamp="$1"
  75     interval="$2"
  76
  77     if [ $interval -eq 0 ]; then
  78         debug_echo "check_stamp: interval=0"
  79         # treat as no time has passed
  80         return 1
  81     fi
  82
  83     if [ ! -f $stamp ]; then
  84         debug_echo "check_stamp: missing time stamp file: $stamp."
  85         # treat as enough time has passed
  86         return 0
  87     fi
  88
  89     # compare midnight today to midnight the day the stamp was updated
  90     stamp_file="$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
 109     delta=$(($now-$stamp))
 110
 111     # intervall is in days, convert to sec.
 112     interval=$(($interval*60*60*24))
 113     debug_echo "check_stamp: interval=$interval, now=$now, stamp=$stamp, delta=$delta (sec)"
 114
 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
 122     if [ $delta -ge $interval ]; then
 123         return 0
 124     fi
 125
 126     return 1
 127 }
 128
 129 update_stamp()
 130 {
 131     stamp="$1"
 132     touch $stamp
 133 }
 134
 135 # we check here if autoclean was enough sizewise
 136 check_size_constraints()
 137 {
 138     MaxAge=0
 139     eval $(apt-config shell MaxAge APT::Archives::MaxAge)
 140     eval $(apt-config shell MaxAge APT::Periodic::MaxAge)
 141
 142     MinAge=2
 143     eval $(apt-config shell MinAge APT::Archives::MinAge)
 144     eval $(apt-config shell MinAge APT::Periodic::MinAge)
 145
 146     MaxSize=0
 147     eval $(apt-config shell MaxSize APT::Archives::MaxSize)
 148     eval $(apt-config shell MaxSize APT::Periodic::MaxSize)
 149
 150     CacheDir="var/cache/apt/"
 151     eval $(apt-config shell CacheDir Dir::Cache)
 152     CacheDir=${CacheDir%/}
 153
 154     CacheArchive="archives/"
 155     eval $(apt-config shell CacheArchive Dir::Cache::archives)
 156     CacheArchive=${CacheArchive%/}
 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
 163
 164     Cache="${Dir%/}/${CacheDir%/}/${CacheArchive%/}/"
 165
 166     # check age
 167     if [ ! $MaxAge -eq 0 ] && [ ! $MinAge -eq 0 ]; then
 168         debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge and ctime>$MinAge and mtime>$MinAge"
 169         find $Cache -name "*.deb"  \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 | xargs -r -0 rm -f
 170     elif [ ! $MaxAge -eq 0 ]; then
 171         debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge only"
 172         find $Cache -name "*.deb"  -ctime +$MaxAge -and -mtime +$MaxAge -print0 | xargs -r -0 rm -f
 173     else
 174         debug_echo "skip aging since MaxAge is 0"
 175     fi
 176
 177     # check size
 178     if [ ! $MaxSize -eq 0 ]; then
 179         # maxSize is in MB
 180         MaxSize=$(($MaxSize*1024))
 181
 182         #get current time
 183         now=$(date --date=$(date --iso-8601) +%s)
 184         MinAge=$(($MinAge*24*60*60))
 185
 186         # reverse-sort by mtime
 187         for file in $(ls -rt $Cache/*.deb 2>/dev/null); do
 188             du=$(du -s $Cache)
 189             size=${du%%/*}
 190             # check if the cache is small enough
 191             if [ $size -lt $MaxSize ]; then
 192                 debug_echo "end remove by archive size:  size=$size < $MaxSize"
 193                 break
 194             fi
 195
 196             # check for MinAge of the file
 197             if [ $MinAge -ne 0 ]; then
 198                 # check both ctime and mtime
 199                 mtime=$(stat -c %Y $file)
 200                 ctime=$(stat -c %Z $file)
 201                 if [ $mtime -gt $ctime ]; then
 202                     delta=$(($now-$mtime))
 203                 else
 204                     delta=$(($now-$ctime))
 205                 fi
 206                 if [ $delta -le $MinAge ]; then
 207                     debug_echo "skip remove by archive size:  $file, delta=$delta < $MinAgeSec"
 208                     break
 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
 213                 fi
 214             fi
 215         done
 216     fi
 217 }
 218
 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
 294 # sleep for a random interval of time (default 30min)
 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))
 308     debug_echo "sleeping for $TIME seconds"
 309     sleep $TIME
 310 }
 311
 312
 313 debug_echo()
 314 {
 315     # Display message if $VERBOSE >= 1
 316     if [ "$VERBOSE" -ge 1 ]; then
 317         echo $1 1>&2
 318     fi
 319 }
 320
 321 # ------------------------ main ----------------------------
 322
 323 # Backup the 7 last versions of APT's extended_states file
 324 # shameless copy from dpkg cron
 325 if cd /var/backups ; then
 326     if ! cmp -s apt.extended_states.0 /var/lib/apt/extended_states; then
 327         cp -p /var/lib/apt/extended_states apt.extended_states
 328         savelog -c 7 apt.extended_states >/dev/null
 329     fi
 330 fi
 331
 332 # check apt-config exstance
 333 if ! which apt-config >/dev/null ; then
 334         exit 0
 335 fi
 336
 337 # check if the user really wants to do something
 338 AutoAptEnable=1  # default is yes
 339 eval $(apt-config shell AutoAptEnable APT::Periodic::Enable)
 340
 341 if [ $AutoAptEnable -eq 0 ]; then
 342     exit 0
 343 fi
 344
 345 # Set VERBOSE mode from  apt-config (or inherit from environment)
 346 VERBOSE=0
 347 eval $(apt-config shell VERBOSE APT::Periodic::Verbose)
 348 debug_echo "verbose level $VERBOSE"
 349 if [ "$VERBOSE" -le 2 ]; then
 350     # quiet for 0,1,2
 351     XSTDOUT=">/dev/null"
 352     XSTDERR="2>/dev/null"
 353     XAPTOPT="-qq"
 354     XUUPOPT=""
 355 else
 356     XSTDOUT=""
 357     XSTDERR=""
 358     XAPTOPT=""
 359     XUUPOPT="-d"
 360 fi
 361 if [ "$VERBOSE" -ge 3 ]; then
 362     # trace output
 363     set -x
 364 fi
 365
 366 # laptop check, on_ac_power returns:
 367 #       0 (true)    System is on main power
 368 #       1 (false)   System is not on main power
 369 #       255 (false) Power status could not be determined
 370 # Desktop systems always return 255 it seems
 371 if which on_ac_power >/dev/null; then
 372     on_ac_power
 373     POWER=$?
 374     if [ $POWER -eq 1 ]; then
 375         debug_echo "exit: system NOT on main power"
 376         exit 0
 377     elif [ $POWER -ne 0 ]; then
 378         debug_echo "power status ($POWER) undetermined, continuing"
 379     fi
 380     debug_echo "system is on main power."
 381 fi
 382
 383 # check if we can lock the cache and if the cache is clean
 384 if which apt-get >/dev/null && ! eval apt-get check -f $XAPTOPT $XSTDERR ; then
 385     debug_echo "error encountered in cron job with \"apt-get check\"."
 386     exit 0
 387 fi
 388
 389 # Global current time in seconds since 1970-01-01 00:00:00 UTC
 390 now=$(date +%s)
 391
 392 # Support old Archive for compatibility.
 393 # Document only Periodic for all controling parameters of this script.
 394
 395 UpdateInterval=0
 396 eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists)
 397
 398 DownloadUpgradeableInterval=0
 399 eval $(apt-config shell DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
 400
 401 UnattendedUpgradeInterval=0
 402 eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade)
 403
 404 AutocleanInterval=0
 405 eval $(apt-config shell AutocleanInterval APT::Periodic::AutocleanInterval)
 406
 407 BackupArchiveInterval=0
 408 eval $(apt-config shell BackupArchiveInterval APT::Periodic::BackupArchiveInterval)
 409
 410 Debdelta=1
 411 eval $(apt-config shell Debdelta APT::Periodic::Download-Upgradeable-Packages-Debdelta)
 412
 413 # check if we actually have to do anything that requires locking the cache
 414 if [ $UpdateInterval -eq 0 ] &&
 415    [ $DownloadUpgradeableInterval -eq 0 ] &&
 416    [ $UnattendedUpgradeInterval -eq 0 ] &&
 417    [ $BackupArchiveInterval -eq 0 ] &&
 418    [ $AutocleanInterval -eq 0 ]; then
 419
 420     # check cache size
 421     check_size_constraints
 422
 423     exit 0
 424 fi
 425
 426 # deal with BackupArchiveInterval
 427 do_cache_backup $BackupArchiveInterval
 428
 429 # sleep random amount of time to avoid hitting the
 430 # mirrors at the same time
 431 random_sleep
 432
 433 # include default system language so that "apt-get update" will
 434 # fetch the right translated package descriptions
 435 if [ -r /etc/default/locale ]; then
 436     . /etc/default/locale
 437     export LANG LANGUAGE LC_MESSAGES LC_ALL
 438 fi
 439
 440 # update package lists
 441 UPDATED=0
 442 UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
 443 if check_stamp $UPDATE_STAMP $UpdateInterval; then
 444     if eval apt-get $XAPTOPT -y update $XSTDERR; then
 445         debug_echo "download updated metadata (success)."
 446         if which dbus-send >/dev/null && pidof dbus-daemon >/dev/null; then
 447             if dbus-send --system / app.apt.dbus.updated boolean:true ; then
 448                 debug_echo "send dbus signal (success)"
 449             else
 450                 debug_echo "send dbus signal (error)"
 451             fi
 452         else
 453             debug_echo "dbus signal not send (command not available)"
 454         fi
 455         update_stamp $UPDATE_STAMP
 456         UPDATED=1
 457     else
 458         debug_echo "download updated metadata (error)"
 459     fi
 460 else
 461     debug_echo "download updated metadata (not run)."
 462 fi
 463
 464 # download all upgradeable packages (if it is requested)
 465 DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
 466 if [ $UPDATED -eq 1 ] && check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
 467     if [ $Debdelta -eq 1 ]; then
 468         debdelta-upgrade >/dev/null 2>&1 || true
 469     fi
 470     if  eval apt-get $XAPTOPT -y -d dist-upgrade $XSTDERR; then
 471         update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
 472         debug_echo "download upgradable (success)"
 473     else
 474         debug_echo "download upgradable (error)"
 475     fi
 476 else
 477     debug_echo "download upgradable (not run)"
 478 fi
 479
 480 # auto upgrade all upgradeable packages
 481 UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
 482 if [ $UPDATED -eq 1 ] && which unattended-upgrade >/dev/null && check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then
 483     if unattended-upgrade $XUUPOPT; then
 484         update_stamp $UPGRADE_STAMP
 485         debug_echo "unattended-upgrade (success)"
 486     else
 487         debug_echo "unattended-upgrade (error)"
 488     fi
 489 else
 490     debug_echo "unattended-upgrade (not run)"
 491 fi
 492
 493 # autoclean package archive
 494 AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
 495 if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
 496     if  eval apt-get $XAPTOPT -y autoclean $XSTDERR; then
 497         debug_echo "autoclean (success)."
 498         update_stamp $AUTOCLEAN_STAMP
 499     else
 500         debug_echo "autoclean (error)"
 501     fi
 502 else
 503     debug_echo "autoclean (not run)"
 504 fi
 505
 506 # check cache size
 507 check_size_constraints
 508
 509 #
 510 #     vim: set sts=4 ai :
 511 #
 512