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- #!/bin/sh
- #
- # Copyright © 2010 Raphaël Hertzog <hertzog@debian.org>
- # Copyright © 2008 Joey Hess <joeyh@debian.org>
- # Copyright © 2007 Guillem Jover (modifications on wiki.debian.org)
- # Copyright © 2005 Scott James Remnant (original implementation on www.dpkg.org)
- #
- # This program is free software; you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation; either version 2 of the License, or
- # (at your option) any later version.
- #
- # This program is distributed 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 General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License
- # along with this program. If not, see <http://www.gnu.org/licenses/>.
-
- # The conffile related functions are inspired by
- # http://wiki.debian.org/DpkgConffileHandling
-
- # This script is documented in dpkg-maintscript-helper(1)
-
- ##
- ## Functions to remove an obsolete conffile during upgrade
- ##
- rm_conffile() {
- local CONFFILE="$1"
- local LASTVERSION="$2"
- local PACKAGE="$3"
- if [ "$LASTVERSION" = "--" ]; then
- LASTVERSION=""
- PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE"
- fi
- if [ "$PACKAGE" = "--" -o -z "$PACKAGE" ]; then
- PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE"
- fi
- # Skip remaining parameters up to --
- while [ "$1" != "--" -a $# -gt 0 ]; do shift; done
- [ $# -gt 0 ] || badusage
- shift
-
- [ -n "$PACKAGE" ] || error "couldn't identify the package"
- [ -n "$1" ] || error "maintainer script parameters are missing"
- [ -n "$DPKG_MAINTSCRIPT_NAME" ] || \
- error "environment variable DPKG_MAINTSCRIPT_NAME is required"
-
- debug "Executing $0 rm_conffile in $DPKG_MAINTSCRIPT_NAME "\
- "of $DPKG_MAINTSCRIPT_PACKAGE"
- debug "CONFFILE=$CONFFILE PACKAGE=$PACKAGE "\
- "LASTVERSION=$LASTVERSION ACTION=$1 PARAM=$2"
- case "$DPKG_MAINTSCRIPT_NAME" in
- preinst)
- if [ "$1" = "install" -o "$1" = "upgrade" ] && [ -n "$2" ] &&
- dpkg --compare-versions "$2" le-nl "$LASTVERSION"; then
- prepare_rm_conffile "$CONFFILE" "$PACKAGE"
- fi
- ;;
- postinst)
- if [ "$1" = "configure" ] && [ -n "$2" ] &&
- dpkg --compare-versions "$2" le-nl "$LASTVERSION"; then
- finish_rm_conffile $CONFFILE
- fi
- ;;
- postrm)
- if [ "$1" = "purge" ]; then
- rm -f "$CONFFILE.dpkg-bak" "$CONFFILE.dpkg-remove" \
- "$CONFFILE.dpkg-backup"
- fi
- if [ "$1" = "abort-install" -o "$1" = "abort-upgrade" ] &&
- [ -n "$2" ] &&
- dpkg --compare-versions "$2" le-nl "$LASTVERSION"; then
- abort_rm_conffile "$CONFFILE"
- fi
- ;;
- *)
- debug "$0 rm_conffile not required in $DPKG_MAINTSCRIPT_NAME"
- ;;
- esac
- }
-
- prepare_rm_conffile() {
- local CONFFILE="$1"
- local PACKAGE="$2"
-
- [ -e "$CONFFILE" ] || return 0
-
- local md5sum="$(md5sum $CONFFILE | sed -e 's/ .*//')"
- local old_md5sum="$(dpkg-query -W -f='${Conffiles}' $PACKAGE | \
- sed -n -e "\' $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
- if [ "$md5sum" != "$old_md5sum" ]; then
- echo "Obsolete conffile $CONFFILE has been modified by you."
- echo "Saving as $CONFFILE.dpkg-bak ..."
- mv -f "$CONFFILE" "$CONFFILE.dpkg-backup"
- else
- echo "Moving obsolete conffile $CONFFILE out of the way..."
- mv -f "$CONFFILE" "$CONFFILE.dpkg-remove"
- fi
- }
-
- finish_rm_conffile() {
- local CONFFILE="$1"
-
- if [ -e "$CONFFILE.dpkg-backup" ]; then
- mv -f "$CONFFILE.dpkg-backup" "$CONFFILE.dpkg-bak"
- fi
- if [ -e "$CONFFILE.dpkg-remove" ]; then
- echo "Removing obsolete conffile $CONFFILE ..."
- rm -f "$CONFFILE.dpkg-remove"
- fi
- }
-
- abort_rm_conffile() {
- local CONFFILE="$1"
-
- if [ -e "$CONFFILE.dpkg-remove" ]; then
- echo "Reinstalling $CONFFILE that was moved away"
- mv "$CONFFILE.dpkg-remove" "$CONFFILE"
- fi
- if [ -e "$CONFFILE.dpkg-backup" ]; then
- echo "Reinstalling $CONFFILE that was backupped"
- mv "$CONFFILE.dpkg-backup" "$CONFFILE"
- fi
- }
-
- ##
- ## Functions to rename a conffile during upgrade
- ##
- mv_conffile() {
- local OLDCONFFILE="$1"
- local NEWCONFFILE="$2"
- local LASTVERSION="$3"
- local PACKAGE="$4"
- if [ "$LASTVERSION" = "--" ]; then
- LASTVERSION=""
- PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE"
- fi
- if [ "$PACKAGE" = "--" -o -z "$PACKAGE" ]; then
- PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE"
- fi
- # Skip remaining parameters up to --
- while [ "$1" != "--" -a $# -gt 0 ]; do shift; done
- [ $# -gt 0 ] || badusage
- shift
-
- [ -n "$PACKAGE" ] || error "couldn't identify the package"
- [ -n "$1" ] || error "maintainer script parameters are missing"
- [ -n "$DPKG_MAINTSCRIPT_NAME" ] || \
- error "environment variable DPKG_MAINTSCRIPT_NAME is required"
-
- debug "Executing $0 mv_conffile in $DPKG_MAINTSCRIPT_NAME "\
- "of $DPKG_MAINTSCRIPT_PACKAGE"
- debug "CONFFILE=$OLDCONFFILE -> $NEWCONFFILE PACKAGE=$PACKAGE "\
- "LASTVERSION=$LASTVERSION ACTION=$1 PARAM=$2"
- case "$DPKG_MAINTSCRIPT_NAME" in
- preinst)
- if [ "$1" = "install" -o "$1" = "upgrade" ] && [ -n "$2" ] &&
- dpkg --compare-versions "$2" le-nl "$LASTVERSION"; then
- prepare_mv_conffile "$OLDCONFFILE" "$PACKAGE"
- fi
- ;;
- postinst)
- if [ "$1" = "configure" ] && [ -n "$2" ] &&
- dpkg --compare-versions "$2" le-nl "$LASTVERSION"; then
- finish_mv_conffile "$OLDCONFFILE" "$NEWCONFFILE"
- fi
- ;;
- postrm)
- if [ "$1" = "abort-install" -o "$1" = "abort-upgrade" ] &&
- [ -n "$2" ] &&
- dpkg --compare-versions "$2" le-nl "$LASTVERSION"; then
- abort_mv_conffile "$OLDCONFFILE"
- fi
- ;;
- *)
- debug "$0 mv_conffile not required in $DPKG_MAINTSCRIPT_NAME"
- ;;
- esac
- }
-
- prepare_mv_conffile() {
- local CONFFILE="$1"
- local PACKAGE="$2"
-
- [ -e "$CONFFILE" ] || return 0
-
- local md5sum="$(md5sum $CONFFILE | sed -e 's/ .*//')"
- local old_md5sum="$(dpkg-query -W -f='${Conffiles}' $PACKAGE | \
- sed -n -e "\' $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
- if [ "$md5sum" = "$old_md5sum" ]; then
- mv -f "$CONFFILE" "$CONFFILE.dpkg-remove"
- fi
- }
-
- finish_mv_conffile() {
- local OLDCONFFILE="$1"
- local NEWCONFFILE="$2"
-
- rm -f $OLDCONFFILE.dpkg-remove
-
- [ -e "$OLDCONFFILE" ] || return 0
-
- echo "Preserving user changes to $NEWCONFFILE (renamed from $OLDCONFFILE)..."
- mv -f "$NEWCONFFILE" "$NEWCONFFILE.dpkg-new"
- mv -f "$OLDCONFFILE" "$NEWCONFFILE"
- }
-
- abort_mv_conffile() {
- local CONFFILE="$1"
-
- if [ -e "$CONFFILE.dpkg-remove" ]; then
- echo "Reinstalling $CONFFILE that was moved away"
- mv "$CONFFILE.dpkg-remove" "$CONFFILE"
- fi
- }
-
- # Common functions
- debug() {
- if [ -n "$DPKG_DEBUG" ]; then
- echo "DEBUG: $PROGNAME: $1" >&2
- fi
- }
-
- error() {
- echo "$PROGNAME: error: $1" >&2
- exit 1
- }
-
- warning() {
- echo "$PROGNAME: warning: $1" >&2
- }
-
- usage() {
- cat <<END
- Syntax: $0 <command> <parameters> -- <maintainer script parameters>
-
- Commands and parameters:
-
- supports <command>
- Returns 0 (success) if the given command is supported, 1
- otherwise.
-
- rm_conffile <conffile> [<last-version> [<package>]]
- Remove obsolete conffile.
- Must be called in preinst, postinst and postrm.
-
- mv_conffile <old-conf> <new-conf> [<last-version> [<package>]]
- Rename a conffile.
- Must be called in preinst, postinst and postrm.
-
- help
- Display this usage information.
- END
- }
-
- badusage() {
- usage
- exit 1
- }
-
- # Main code
- set -e
-
- PROGNAME=$(basename $0)
- version="1.15.8.13"
- command="$1"
- [ $# -gt 0 ] || badusage
- shift
-
- case "$command" in
- supports)
- case "$1" in
- rm_conffile|mv_conffile)
- code=0
- ;;
- *)
- code=1
- ;;
- esac
- if [ -z "$DPKG_MAINTSCRIPT_NAME" ]; then
- warning "environment variable DPKG_MAINTSCRIPT_NAME missing"
- code=1
- fi
- if [ -z "$DPKG_MAINTSCRIPT_PACKAGE" ]; then
- warning "environment variable DPKG_MAINTSCRIPT_PACKAGE missing"
- code=1
- fi
- exit $code
- ;;
- rm_conffile)
- rm_conffile "$@"
- ;;
- mv_conffile)
- mv_conffile "$@"
- ;;
- --help|help|-?|-h)
- usage
- ;;
- --version)
- cat <<-END
- Debian $PROGNAME version $version.
-
- Copyright (C) 2010 Raphaël Hertzog <hertzog@debian.org>
- Copyright (C) 2008 Joey Hess <joeyh@debian.org>
- Copyright (C) 2007 Guillem Jover <guillem@debian.org>
- Copyright (C) 2005 Scott James Remnant
-
- This is free software; see the GNU General Public License version 2 or
- later for copying conditions. There is NO warranty.
- END
- ;;
- *)
- cat >&2 <<-END
- $PROGNAME: error: command $command is unknown
- Hint: upgrading dpkg to a newer version might help.
-
- END
- usage
- exit 1
- esac
-
- exit 0
-