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1 | #!/bin/sh | |
2 | # | |
3 | ||
4 | #set -e | |
5 | # | |
6 | # This file understands the following apt configuration variables: | |
7 | # | |
8 | # "APT::Periodic::Update-Package-Lists=1" | |
9 | # - Do "apt-get update" automatically every n-days (0=disable) | |
10 | # | |
11 | # "APT::Periodic::Download-Upgradeable-Packages=0", | |
12 | # - Do "apt-get upgrade --download-only" every n-days (0=disable) | |
13 | # | |
14 | # "APT::Periodic::AutocleanInterval" | |
15 | # - Do "apt-get autoclean" every n-days (0=disable) | |
16 | # | |
17 | # "APT::Periodic::Unattended-Upgrade" | |
18 | # - Run the "unattended-upgrade" security upgrade script | |
19 | # every n-days (0=disabled) | |
20 | # Requires the package "unattended-upgrades" and will write | |
21 | # a log in /var/log/unattended-upgrades | |
22 | # | |
23 | # "APT::Archives::MaxAge", | |
24 | # - Set maximum allowed age of a cache package file. If a cache | |
25 | # package file is older it is deleted (0=disable) | |
26 | # | |
27 | # "APT::Archives::MaxSize", | |
28 | # - Set maximum size of the cache in MB (0=disable). If the cache | |
29 | # is bigger, cached package files are deleted until the size | |
30 | # requirement is met (the biggest packages will be deleted | |
31 | # first). | |
32 | # | |
33 | # "APT::Archives::MinAge" | |
34 | # - Set minimum age of a package file. If a file is younger it | |
35 | # will not be deleted (0=disable). Usefull to prevent races | |
36 | # and to keep backups of the packages for emergency. | |
37 | # | |
38 | ||
39 | check_stamp() | |
40 | { | |
41 | stamp="$1" | |
42 | interval="$2" | |
43 | ||
44 | if [ $interval -eq 0 ]; then | |
45 | return 1 | |
46 | fi | |
47 | ||
48 | if [ ! -f $stamp ]; then | |
49 | return 0 | |
50 | fi | |
51 | ||
52 | # compare midnight today to midnight the day the stamp was updated | |
53 | stamp=$(date --date=$(date -r $stamp --iso-8601) +%s) | |
54 | now=$(date --date=$(date --iso-8601) +%s) | |
55 | delta=$(($now-$stamp)) | |
56 | ||
57 | # intervall is in days, | |
58 | interval=$(($interval*60*60*24)) | |
59 | #echo "stampfile: $1" | |
60 | #echo "interval=$interval, now=$now, stamp=$stamp, delta=$delta" | |
61 | ||
62 | if [ $delta -ge $interval ]; then | |
63 | return 0 | |
64 | fi | |
65 | ||
66 | return 1 | |
67 | } | |
68 | ||
69 | update_stamp() | |
70 | { | |
71 | stamp="$1" | |
72 | ||
73 | touch $stamp | |
74 | } | |
75 | ||
76 | ||
77 | ||
78 | # we check here if autoclean was enough sizewise | |
79 | check_size_constraints() | |
80 | { | |
81 | # min-age in days | |
82 | MaxAge=0 | |
83 | MinAge=2 | |
84 | MaxSize=0 | |
85 | CacheDir="var/cache/apt" | |
86 | CacheArchive="archives/" | |
87 | eval $(apt-config shell MaxAge APT::Archives::MaxAge) | |
88 | eval $(apt-config shell MinAge APT::Archives::MinAge) | |
89 | eval $(apt-config shell MaxSize APT::Archives::MaxSize) | |
90 | eval $(apt-config shell Dir Dir) | |
91 | eval $(apt-config shell CacheDir Dir::Cache) | |
92 | eval $(apt-config shell CacheArchive Dir::Cache::archives) | |
93 | ||
94 | # sanity check | |
95 | if [ -z "$CacheDir" -o -z "$CacheArchive" ]; then | |
96 | echo "empty Dir::Cache or Dir::Cache::archives, exiting" | |
97 | exit | |
98 | fi | |
99 | ||
100 | Cache="${Dir%/}/${CacheDir%/}/${CacheArchive%/}/" | |
101 | ||
102 | # check age | |
103 | if [ ! $MaxAge -eq 0 ] && [ ! $MinAge -eq 0 ]; then | |
104 | find $Cache -name "*.deb" \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 | xargs -r -0 rm -f | |
105 | elif [ ! $MaxAge -eq 0 ]; then | |
106 | find $Cache -name "*.deb" -ctime +$MaxAge -and -mtime +$MaxAge -print0 | xargs -r -0 rm -f | |
107 | fi | |
108 | ||
109 | # check size | |
110 | if [ ! $MaxSize -eq 0 ]; then | |
111 | # maxSize is in MB | |
112 | MaxSize=$(($MaxSize*1024)) | |
113 | ||
114 | #get current time | |
115 | now=$(date --date=$(date --iso-8601) +%s) | |
116 | MinAge=$(($MinAge*24*60*60)) | |
117 | ||
118 | # reverse-sort by mtime | |
119 | for file in $(ls -rt $Cache/*.deb 2>/dev/null); do | |
120 | du=$(du -s $Cache) | |
121 | size=${du%%/*} | |
122 | # check if the cache is small enough | |
123 | if [ $size -lt $MaxSize ]; then | |
124 | break | |
125 | fi | |
126 | ||
127 | # check for MinAge of the file | |
128 | if [ ! $MinAge -eq 0 ]; then | |
129 | # check both ctime and mtime | |
130 | mtime=$(stat -c %Y $file) | |
131 | ctime=$(stat -c %Z $file) | |
132 | if [ $mtime -gt $ctime ]; then | |
133 | delta=$(($now-$mtime)) | |
134 | else | |
135 | delta=$(($now-$ctime)) | |
136 | fi | |
137 | #echo "$file ($delta), $MinAge" | |
138 | if [ $delta -le $MinAge ]; then | |
139 | #echo "Skiping $file (delta=$delta)" | |
140 | break | |
141 | fi | |
142 | fi | |
143 | ||
144 | # delete oldest file | |
145 | rm -f $file | |
146 | done | |
147 | fi | |
148 | } | |
149 | ||
150 | ||
151 | UpdateInterval=0 | |
152 | DownloadUpgradeableInterval=0 | |
153 | eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages) | |
154 | AutocleanInterval=$DownloadUpgradeableInterval | |
155 | eval $(apt-config shell AutocleanInterval APT::Periodic::Autoclean) | |
156 | ||
157 | UnattendedUpgradeInterval=0 | |
158 | eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade) | |
159 | ||
160 | ||
161 | # laptop check, on_ac_power returns: | |
162 | # 0 (true) System is on mains power | |
163 | # 1 (false) System is not on mains power | |
164 | # 255 (false) Power status could not be determined | |
165 | # Desktop systems always return 255 it seems | |
166 | if which on_ac_power >/dev/null; then | |
167 | on_ac_power | |
168 | if [ $? -eq 1 ]; then | |
169 | exit 0 | |
170 | fi | |
171 | fi | |
172 | ||
173 | UPDATE_STAMP=/var/lib/apt/periodic/update-stamp | |
174 | if check_stamp $UPDATE_STAMP $UpdateInterval; then | |
175 | if apt-get -qq update 2>/dev/null; then | |
176 | if which dbus-send >/dev/null; then | |
177 | dbus-send --system / app.apt.dbus.updated boolean:true | |
178 | fi | |
179 | update_stamp $UPDATE_STAMP | |
180 | fi | |
181 | fi | |
182 | ||
183 | DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp | |
184 | if check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then | |
185 | apt-get -qq -d dist-upgrade 2>/dev/null | |
186 | update_stamp $DOWNLOAD_UPGRADEABLE_STAMP | |
187 | fi | |
188 | ||
189 | AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp | |
190 | if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then | |
191 | apt-get -qq autoclean | |
192 | update_stamp $AUTOCLEAN_STAMP | |
193 | fi | |
194 | ||
195 | UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp | |
196 | if check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then | |
197 | unattended-upgrade | |
198 | update_stamp $UPGRADE_STAMP | |
199 | fi | |
200 | ||
201 | # check cache size | |
202 | check_size_constraints |