| | 1 | #!/bin/sh |
| | 2 | set -e |
| | 3 | |
| | 4 | # Author: Steve Langasek <steve.langasek@canonical.com> |
| | 5 | # |
| | 6 | # Mark as not-for-autoremoval those kernel packages that are: |
| | 7 | # - the currently booted version |
| | 8 | # - the kernel version we've been called for |
| | 9 | # - the latest kernel version (determined using rules copied from the grub |
| | 10 | # package for deciding which kernel to boot) |
| | 11 | # - the second-latest kernel version, if the booted kernel version is |
| | 12 | # already the latest and this script is called for that same version, |
| | 13 | # to ensure a fallback remains available in the event the newly-installed |
| | 14 | # kernel at this ABI fails to boot |
| | 15 | # In the common case, this results in exactly two kernels saved, but it can |
| | 16 | # result in three kernels being saved. It's better to err on the side of |
| | 17 | # saving too many kernels than saving too few. |
| | 18 | # |
| | 19 | # We generate this list and save it to /etc/apt/apt.conf.d instead of marking |
| | 20 | # packages in the database because this runs from a postinst script, and apt |
| | 21 | # will overwrite the db when it exits. |
| | 22 | |
| | 23 | |
| | 24 | eval $(apt-config shell APT_CONF_D Dir::Etc::parts/d) |
| | 25 | test -n "${APT_CONF_D}" || APT_CONF_D="/etc/apt/apt.conf.d" |
| | 26 | config_file=${APT_CONF_D}/01autoremove-kernels |
| | 27 | |
| | 28 | eval $(apt-config shell DPKG Dir::bin::dpkg/f) |
| | 29 | test -n "$DPKG" || DPKG="/usr/bin/dpkg" |
| | 30 | |
| | 31 | installed_version="$1" |
| | 32 | running_version="$(uname -r)" |
| | 33 | |
| | 34 | |
| | 35 | version_test_gt () |
| | 36 | { |
| | 37 | local version_test_gt_sedexp="s/[._-]\(pre\|rc\|test\|git\|old\|trunk\)/~\1/g" |
| | 38 | local version_a="`echo "$1" | sed -e "$version_test_gt_sedexp"`" |
| | 39 | local version_b="`echo "$2" | sed -e "$version_test_gt_sedexp"`" |
| | 40 | $DPKG --compare-versions "$version_a" gt "$version_b" |
| | 41 | return "$?" |
| | 42 | } |
| | 43 | |
| | 44 | list="$(${DPKG} -l | awk '/^ii[ ]+(linux|kfreebsd|gnumach)-image-[0-9]*/ && $2 !~ /-dbg$/ { print $2 }' | sed -e 's#\(linux\|kfreebsd\|gnumach\)-image-##')" |
| | 45 | |
| | 46 | latest_version="" |
| | 47 | previous_version="" |
| | 48 | for i in $list; do |
| | 49 | if version_test_gt "$i" "$latest_version"; then |
| | 50 | previous_version="$latest_version" |
| | 51 | latest_version="$i" |
| | 52 | elif version_test_gt "$i" "$previous_version"; then |
| | 53 | previous_version="$i" |
| | 54 | fi |
| | 55 | done |
| | 56 | |
| | 57 | if [ "$latest_version" != "$installed_version" ] \ |
| | 58 | || [ "$latest_version" != "$running_version" ] \ |
| | 59 | || [ "$installed_version" != "$running_version" ] |
| | 60 | then |
| | 61 | # We have at least two kernels that we have reason to think the |
| | 62 | # user wants, so don't save the second-newest version. |
| | 63 | previous_version= |
| | 64 | fi |
| | 65 | |
| | 66 | kernels="$(echo "$latest_version |
| | 67 | $installed_version |
| | 68 | $running_version |
| | 69 | $previous_version" | sort -u | sed -e 's#\.#\\.#g' )" |
| | 70 | |
| | 71 | generateconfig() { |
| | 72 | cat <<EOF |
| | 73 | // DO NOT EDIT! File autogenerated by $0 |
| | 74 | APT::NeverAutoRemove |
| | 75 | { |
| | 76 | EOF |
| | 77 | apt-config dump --no-empty --format '%v%n' 'APT::VersionedKernelPackages' | while read package; do |
| | 78 | for kernel in $kernels; do |
| | 79 | echo " \"^${package}-${kernel}$\";" |
| | 80 | done |
| | 81 | done |
| | 82 | echo '};' |
| | 83 | } |
| | 84 | generateconfig > "${config_file}.dpkg-new" |
| | 85 | mv "${config_file}.dpkg-new" "$config_file" |
projects / apt.git / blame_incremental