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