summaryrefslogtreecommitdiff
path: root/debian/apt.systemd.daily
blob: c4f3c24f0913639b6c9f59aecbd0ded6b6642376 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
#!/bin/sh
#set -e
#
# This file understands the following apt configuration variables:
# Values here are the default.
# Create /etc/apt/apt.conf.d/10periodic file to set your preference.
#
#  Dir "/";
#  - RootDir for all configuration files
#
#  Dir::Cache "var/cache/apt/";
#  - 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). Useful 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 oldest 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::CleanInterval "0";
#  - Do "apt-get clean" 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 = always ]; then
	debug_echo "check_stamp: ignoring time stamp file, interval set to always"
	# treat as enough time has passed
        return 0
    fi

    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 (e.g. 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 (e.g. America/Sao_Paulo), if date returns with error
        # return 0.
        return 0
    fi

    delta=$(($now-$stamp))

    # Calculate the interval in seconds depending on the unit specified
    if [ "${interval%s}" != "$interval" ] ; then
        interval="${interval%s}"
    elif [ "${interval%m}" != "$interval" ] ; then
        interval="${interval%m}"
        interval=$((interval*60))
    elif [ "${interval%h}" != "$interval" ] ; then
        interval="${interval%h}"
        interval=$((interval*60*60))
    else
        interval="${interval%d}"
        interval=$((interval*60*60*24))
    fi

    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 < $MinAge"
		    break
		else
		    # delete oldest file
		    debug_echo "remove by archive size: $file, delta=$delta >= $MinAge (sec), size=$size >= $MaxSize"
		    rm -f $file
		fi
	    fi
	done
    fi
}

# deal with the Apt::Periodic::BackupArchiveInterval
do_cache_backup()
{
    BackupArchiveInterval="$1"
    if [ $BackupArchiveInterval = always ]; then
        :
    elif [ $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
}

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

# ------------------------ main ----------------------------
if [ "$1" = "lock_is_held" ]; then
    shift
else
    # Maintain a lock on fd 3, so we can't run the script twice at the same
    # time.
    eval $(apt-config shell StateDir Dir::State/d)
    exec 3>${StateDir}/daily_lock
    if ! flock -w 3600 3; then
        echo "E: Could not acquire lock" >&2
        exit 1
    fi

    # We hold the lock.  Rerun this script as a child process, which
    # can run without propagating an extra fd to all of its children.
    "$0" lock_is_held "$@" 3>&-
    exit $?
fi

if test -r /var/lib/apt/extended_states; then
    # 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
fi

# check apt-config existence
if ! which apt-config >/dev/null 2>&1; 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 1 ]; then
    # quiet for 0/1
    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 if we can lock the cache and if the cache is clean
if which apt-get >/dev/null 2>&1 && ! eval apt-get check $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 controlling 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)

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

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 = always ] ||
   [ $DownloadUpgradeableInterval = always ] ||
   [ $UnattendedUpgradeInterval = always ] ||
   [ $BackupArchiveInterval = always ] ||
   [ $AutocleanInterval = always ] ||
   [ $CleanInterval = always ] ; then
    :
elif [ $UpdateInterval -eq 0 ] &&
     [ $DownloadUpgradeableInterval -eq 0 ] &&
     [ $UnattendedUpgradeInterval -eq 0 ] &&
     [ $BackupArchiveInterval -eq 0 ] &&
     [ $AutocleanInterval -eq 0 ] &&
     [ $CleanInterval -eq 0 ] ; then

    # check cache size
    check_size_constraints

    exit 0
fi

if [ "$1" = "update" -o -z "$1" ] ; then
    # deal with BackupArchiveInterval
    do_cache_backup $BackupArchiveInterval

    # 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)."
	    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

    if which unattended-upgrade >/dev/null 2>&1 && unattended-upgrade --help | grep -q download-only && check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $UnattendedUpgradeInterval; then
	if unattended-upgrade --download-only $XUUPOPT; then
	    update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
	    debug_echo "unattended-upgrade -d (success)"
	else
	    debug_echo "unattended-upgrade -d (error)"
	fi
    else
	debug_echo "unattended-upgrade -d (not run)"
    fi
fi

if [ "$1" = "install" -o -z "$1" ] ; then
    # auto upgrade all upgradeable packages
    UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
    if which unattended-upgrade >/dev/null 2>&1 && 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

    # clean package archive
    CLEAN_STAMP=/var/lib/apt/periodic/clean-stamp
    if check_stamp $CLEAN_STAMP $CleanInterval; then
	if  eval apt-get $XAPTOPT -y clean $XSTDERR; then
	    debug_echo "clean (success)."
	    update_stamp $CLEAN_STAMP
	else
	    debug_echo "clean (error)"
	fi
    else
	debug_echo "clean (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
fi

#
#     vim: set sts=4 ai :
#