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-rw-r--r--debian/apt.auto-removal.sh74
1 files changed, 24 insertions, 50 deletions
diff --git a/debian/apt.auto-removal.sh b/debian/apt.auto-removal.sh
index 807c6f745..f615fa677 100644
--- a/debian/apt.auto-removal.sh
+++ b/debian/apt.auto-removal.sh
@@ -1,72 +1,45 @@
#!/bin/sh
set -e
-
-# Author: Steve Langasek <steve.langasek@canonical.com>
-#
# Mark as not-for-autoremoval those kernel packages that are:
# - the currently booted version
# - the kernel version we've been called for
-# - the latest kernel version (determined using rules copied from the grub
-# package for deciding which kernel to boot)
-# - the second-latest kernel version, if the booted kernel version is
-# already the latest and this script is called for that same version,
-# to ensure a fallback remains available in the event the newly-installed
-# kernel at this ABI fails to boot
-# In the common case, this results in exactly two kernels saved, but it can
-# result in three kernels being saved. It's better to err on the side of
-# saving too many kernels than saving too few.
+# - the latest kernel version (as determined by debian version number)
+# - the second-latest kernel version
#
-# We generate this list and save it to /etc/apt/apt.conf.d instead of marking
-# packages in the database because this runs from a postinst script, and apt
-# will overwrite the db when it exits.
-
+# In the common case this results in two kernels saved (booted into the
+# second-latest kernel, we install the latest kernel in an upgrade), but
+# can save up to four. Kernel refers here to a distinct release, which can
+# potentially be installed in multiple flavours counting as one kernel.
eval $(apt-config shell APT_CONF_D Dir::Etc::parts/d)
test -n "${APT_CONF_D}" || APT_CONF_D="/etc/apt/apt.conf.d"
-config_file=${APT_CONF_D}/01autoremove-kernels
+config_file="${APT_CONF_D}/01autoremove-kernels"
eval $(apt-config shell DPKG Dir::bin::dpkg/f)
test -n "$DPKG" || DPKG="/usr/bin/dpkg"
-installed_version="$1"
-running_version="$(uname -r)"
+list="$(${DPKG} -l | awk '/^[ih][^nc][ ]+(linux|kfreebsd|gnumach)-image-[0-9]+\./ && $2 !~ /-dbg$/ && $2 !~ /-dbgsym$/ { print $2,$3; }' \
+ | sed -e 's#^\(linux\|kfreebsd\|gnumach\)-image-##' -e 's#:[^:]\+ # #')"
+debverlist="$(echo "$list" | cut -d' ' -f 2 | sort --unique --reverse --version-sort)"
-version_test_gt ()
-{
- local version_test_gt_sedexp="s/[._-]\(pre\|rc\|test\|git\|old\|trunk\)/~\1/g"
- local version_a="`echo "$1" | sed -e "$version_test_gt_sedexp"`"
- local version_b="`echo "$2" | sed -e "$version_test_gt_sedexp"`"
- $DPKG --compare-versions "$version_a" gt "$version_b"
- return "$?"
-}
-
-list="$(${DPKG} -l | awk '/^ii[ ]+(linux|kfreebsd|gnumach)-image-[0-9]+\./ && $2 !~ /-dbg$/ { print $2 }' | sed -e 's#\(linux\|kfreebsd\|gnumach\)-image-##')"
-
-latest_version=""
-previous_version=""
-for i in $list; do
- if version_test_gt "$i" "$latest_version"; then
- previous_version="$latest_version"
- latest_version="$i"
- elif version_test_gt "$i" "$previous_version"; then
- previous_version="$i"
- fi
-done
-
-if [ "$latest_version" != "$installed_version" ] \
- || [ "$latest_version" != "$running_version" ] \
- || [ "$installed_version" != "$running_version" ]
-then
- # We have at least two kernels that we have reason to think the
- # user wants, so don't save the second-newest version.
- previous_version=
+if [ -n "$1" ]; then
+ installed_version="$(echo "$list" | awk "\$1 == \"$1\" { print \$2;exit; }")"
+fi
+unamer="$(uname -r)"
+if [ -n "$unamer" ]; then
+ running_version="$(echo "$list" | awk "\$1 == \"$unamer\" { print \$2;exit; }")"
fi
+latest_version="$(echo "$debverlist" | sed -n 1p)"
+previous_version="$(echo "$debverlist" | sed -n 2p)"
-kernels="$(echo "$latest_version
+debkernels="$(echo "$latest_version
$installed_version
$running_version
-$previous_version" | sort -u | sed -e 's#\.#\\.#g' )"
+$previous_version" | sort -u | sed -e '/^$/ d')"
+kernels="$( (echo "$1
+$unamer"; for deb in $debkernels; do echo "$list" | awk "\$2 == \"$deb\" { print \$1; }"; done; ) \
+ | sed -e 's#\.#\\.#g' -e '/^$/ d' | sort -u)"
generateconfig() {
cat <<EOF
@@ -83,3 +56,4 @@ EOF
}
generateconfig > "${config_file}.dpkg-new"
mv "${config_file}.dpkg-new" "$config_file"
+chmod 444 "$config_file"