[ucc/update/remove/old/kernel]

Description[de]=Alte Kernel-Pakete werden vor der Verwaltung von Software-Paketen mit apt-get entfernt (default: true)

Description[en]=Remove old kernel packages before managing software packages with apt-get (default: true)

Type=str

Categories=system-desktop

[ucc/update/remove/old/kernel/pkgregex]

Description[de]=Regulärer Ausdruck für die Suche nach Kernel-Paketen (default: linux-image-[[:digit:]])

Description[en]=Regular expression used for search for kernel packages (default: linux-image-[[:digit:]])

Type=str

Categories=system-desktop

usr/share/univention-corporate-client/apt-pre-invoke.d

univention-config-registry set ucc/update/remove/old/kernel?true

apt-get-pre-invoke.d/univention-ucc-prune-old-kernel-packages usr/share/univention-corporate-client/apt-pre-invoke.d/

Type: file

File: etc/apt/apt.conf.d/900-ucc-pre-invoke

#!/bin/bash

#

# Univention Corporate Client

#  remove old, unused kernel packages

#

# Copyright 2013 Univention GmbH

#

# http://www.univention.de/

#

# All rights reserved.

#

# The source code of this program is made available

# under the terms of the GNU Affero General Public License version 3

# (GNU AGPL V3) as published by the Free Software Foundation.

#

# Binary versions of this program provided by Univention to you as

# well as other copyrighted, protected or trademarked materials like

# Logos, graphics, fonts, specific documentations and configurations,

# cryptographic keys etc. are subject to a license agreement between

# you and Univention and not subject to the GNU AGPL V3.

#

# In the case you use this program under the terms of the GNU AGPL V3,

# the program is provided in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU Affero General Public License for more details.

#

# You should have received a copy of the GNU Affero General Public

# License with the Debian GNU/Linux or Univention distribution in file

# /usr/share/common-licenses/AGPL-3; if not, see

# <http://www.gnu.org/licenses/>.

# returns latest kernel package for given kernel version

export LC_ALL=C

export DEBIAN_FRONTEND=noninteractive

removeOldKernelPackages () {

	local kernel_regex="$1"

	local running_kernel="$(uname -r)"

	local pkg=""

	local pkg_ver=""

	local latest_pkg=""

	local latest_pkg_ver=""

	local kernel_packages=""

	# remove all $kernel_regex packages except

	# the running kernel

	for pkg in $(dpkg-query -W -f '${Package}\n' | grep "$kernel_regex" | sort -n); do

		if [ "$(dpkg-query -W -f='${Status}\n' "$pkg" 2>/dev/null)" = "install ok installed" ]; then

			kernel_packages="$kernel_packages $pkg"

			pkg_ver="$(dpkg-query -W -f '${Version}\n' $pkg)"

			if dpkg --compare-versions "$pkg_ver" gt "$latest_pkg_ver" ; then

				latest_pkg_ver="$pkg_ver"

				latest_pkg="$pkg"

			fi

		fi

	done

	# remove kernel package

	for i in $kernel_packages; do

		# do not remove running and latest kernel

		if ! echo "$i" | grep -q "$running_kernel\|$latest_pkg"; then

			echo "removing kernel as requested in $0"

			dpkg -P $i || true

		fi

	done

}

remove=$(/usr/sbin/ucr get ucc/update/remove/old/kernel)

remove_regex=$(/usr/sbin/ucr get ucc/update/remove/old/kernel/pkgregex)

if [ -n "$remove" -a "$remove" = "true" ]; then

	if [ -z "$remove_regex" ]; then

		remove_regex="linux-image-[[:digit:]]"

	fi

	removeOldKernelPackages "$remove_regex"

fi

exit 0