projects / apt.git / blame
| Commit | Line | Data |
|---|---|---|
| a86f8516 SL |
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) | |
| bac1fd14 SL |
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 | |
| a86f8516 SL |
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="" | |
| bac1fd14 | 42 | previous_version="" |
| a86f8516 SL |
43 | for i in $list; do |
| 44 | if version_test_gt "$i" "$latest_version"; then | |
| bac1fd14 | 45 | previous_version="$latest_version" |
| a86f8516 | 46 | latest_version="$i" |
| bac1fd14 SL |
47 | elif version_test_gt "$i" "$previous_version"; then |
| 48 | previous_version="$i" | |
| a86f8516 SL |
49 | fi |
| 50 | done | |
| 51 | ||
| bac1fd14 SL |
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 | ||
| a86f8516 SL |
61 | kernels=$(sort -u <<EOF |
| 62 | $latest_version | |
| 63 | $installed_version | |
| 64 | $running_version | |
| bac1fd14 | 65 | $previous_version |
| a86f8516 SL |
66 | EOF |
| 67 | ) | |
| 68 | ||
| 69 | cat > "$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" |