| | 1 | #!/bin/sh |
| | 2 | |
| | 3 | set -e |
| | 4 | |
| | 5 | # Author: Steve Langasek <steve.langasek@canonical.com> |
| | 6 | # |
| | 7 | # Mark as not-for-autoremoval those kernel packages that are: |
| | 8 | # - the currently booted version |
| | 9 | # - the kernel version we've been called for |
| | 10 | # - the latest kernel version (determined using rules copied from the grub |
| | 11 | # package for deciding which kernel to boot) |
| | 12 | # - the second-latest kernel version, if the booted kernel version is |
| | 13 | # already the latest and this script is called for that same version, |
| | 14 | # to ensure a fallback remains available in the event the newly-installed |
| | 15 | # kernel at this ABI fails to boot |
| | 16 | # In the common case, this results in exactly two kernels saved, but it can |
| | 17 | # result in three kernels being saved. It's better to err on the side of |
| | 18 | # saving too many kernels than saving too few. |
| | 19 | # |
| | 20 | # We generate this list and save it to /etc/apt/apt.conf.d instead of marking |
| | 21 | # packages in the database because this runs from a postinst script, and apt |
| | 22 | # will overwrite the db when it exits. |
| | 23 | |
| | 24 | config_file=/etc/apt/apt.conf.d/01autoremove-kernels |
| | 25 | |
| | 26 | installed_version="$1" |
| | 27 | running_version="$(uname -r)" |
| | 28 | |
| | 29 | |
| | 30 | version_test_gt () |
| | 31 | { |
| | 32 | local version_test_gt_sedexp="s/[._-]\(pre\|rc\|test\|git\|old\|trunk\)/~\1/g" |
| | 33 | local version_a="`echo "$1" | sed -e "$version_test_gt_sedexp"`" |
| | 34 | local version_b="`echo "$2" | sed -e "$version_test_gt_sedexp"`" |
| | 35 | dpkg --compare-versions "$version_a" gt "$version_b" |
| | 36 | return "$?" |
| | 37 | } |
| | 38 | |
| | 39 | list=$(dpkg -l 'linux-image-[0-9]*'|awk '/^ii/ { print $2 }' | sed -e's/linux-image-//') |
| | 40 | |
| | 41 | latest_version="" |
| | 42 | previous_version="" |
| | 43 | for i in $list; do |
| | 44 | if version_test_gt "$i" "$latest_version"; then |
| | 45 | previous_version="$latest_version" |
| | 46 | latest_version="$i" |
| | 47 | elif version_test_gt "$i" "$previous_version"; then |
| | 48 | previous_version="$i" |
| | 49 | fi |
| | 50 | done |
| | 51 | |
| | 52 | if [ "$latest_version" != "$installed_version" ] \ |
| | 53 | || [ "$latest_version" != "$running_version" ] \ |
| | 54 | || [ "$installed_version" != "$running_version" ] |
| | 55 | then |
| | 56 | # We have at least two kernels that we have reason to think the |
| | 57 | # user wants, so don't save the second-newest version. |
| | 58 | previous_version= |
| | 59 | fi |
| | 60 | |
| | 61 | kernels=$(sort -u <<EOF |
| | 62 | $latest_version |
| | 63 | $installed_version |
| | 64 | $running_version |
| | 65 | $previous_version |
| | 66 | EOF |
| | 67 | ) |
| | 68 | |
| | 69 | cat > "$config_file".dpkg-new <<EOF |
| | 70 | # File autogenerated by $0, do not edit |
| | 71 | APT |
| | 72 | { |
| | 73 | NeverAutoRemove |
| | 74 | { |
| | 75 | EOF |
| | 76 | for kernel in $kernels; do |
| | 77 | echo " \"^linux-image-$kernel.*\";" >> "$config_file".dpkg-new |
| | 78 | echo " \"^linux-image-extra-$kernel.*\";" >> "$config_file".dpkg-new |
| | 79 | echo " \"^linux-signed-image-$kernel.*\";" >> "$config_file".dpkg-new |
| | 80 | done |
| | 81 | cat >> "$config_file".dpkg-new <<EOF |
| | 82 | }; |
| | 83 | }; |
| | 84 | EOF |
| | 85 | mv "$config_file".dpkg-new "$config_file" |
projects / apt.git / blame_incremental