668 lines
21 KiB
Bash
Executable File
668 lines
21 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright © 2007, 2011-2015 Guillem Jover <guillem@debian.org>
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# Copyright © 2010 Raphaël Hertzog <hertzog@debian.org>
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# Copyright © 2008 Joey Hess <joeyh@debian.org>
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# Copyright © 2005 Scott James Remnant (original implementation on www.dpkg.org)
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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# The conffile related functions are inspired by
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# https://wiki.debian.org/DpkgConffileHandling
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# This script is documented in dpkg-maintscript-helper(1)
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##
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## Functions to remove an obsolete conffile during upgrade
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##
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rm_conffile() {
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local CONFFILE="$1"
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local LASTVERSION="$2"
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local PACKAGE="$3"
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if [ "$LASTVERSION" = "--" ]; then
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LASTVERSION=""
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PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE${DPKG_MAINTSCRIPT_ARCH:+:$DPKG_MAINTSCRIPT_ARCH}"
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fi
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if [ "$PACKAGE" = "--" -o -z "$PACKAGE" ]; then
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PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE${DPKG_MAINTSCRIPT_ARCH:+:$DPKG_MAINTSCRIPT_ARCH}"
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fi
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# Skip remaining parameters up to --
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while [ "$1" != "--" -a $# -gt 0 ]; do
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shift
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done
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[ $# -gt 0 ] || badusage "missing arguments after --"
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shift
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[ -n "$PACKAGE" ] || error "couldn't identify the package"
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[ -n "$1" ] || error "maintainer script parameters are missing"
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[ -n "$DPKG_MAINTSCRIPT_NAME" ] || \
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error "environment variable DPKG_MAINTSCRIPT_NAME is required"
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[ -n "$DPKG_MAINTSCRIPT_PACKAGE" ] || \
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error "environment variable DPKG_MAINTSCRIPT_PACKAGE is required"
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[ "${CONFFILE}" != "${CONFFILE#/}" ] || \
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error "conffile '$CONFFILE' is not an absolute path"
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validate_optional_version "$LASTVERSION"
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debug "Executing $0 rm_conffile in $DPKG_MAINTSCRIPT_NAME" \
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"of $DPKG_MAINTSCRIPT_PACKAGE"
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debug "CONFFILE=$CONFFILE PACKAGE=$PACKAGE" \
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"LASTVERSION=$LASTVERSION ACTION=$1 PARAM=$2"
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case "$DPKG_MAINTSCRIPT_NAME" in
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preinst)
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if [ "$1" = "install" -o "$1" = "upgrade" ] && [ -n "$2" ] &&
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dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
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prepare_rm_conffile "$CONFFILE" "$PACKAGE"
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fi
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;;
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postinst)
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if [ "$1" = "configure" ] && [ -n "$2" ] &&
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dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
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finish_rm_conffile "$CONFFILE"
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fi
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;;
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postrm)
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if [ "$1" = "purge" ]; then
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rm -f "$DPKG_ROOT$CONFFILE.dpkg-bak" \
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"$DPKG_ROOT$CONFFILE.dpkg-remove" \
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"$DPKG_ROOT$CONFFILE.dpkg-backup"
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fi
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if [ "$1" = "abort-install" -o "$1" = "abort-upgrade" ] &&
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[ -n "$2" ] &&
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dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
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abort_rm_conffile "$CONFFILE" "$PACKAGE"
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fi
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;;
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*)
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debug "$0 rm_conffile not required in $DPKG_MAINTSCRIPT_NAME"
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;;
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esac
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}
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prepare_rm_conffile() {
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local CONFFILE="$1"
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local PACKAGE="$2"
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[ -e "$DPKG_ROOT$CONFFILE" ] || return 0
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ensure_package_owns_file "$PACKAGE" "$CONFFILE" || return 0
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local md5sum old_md5sum
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md5sum="$(md5sum "$DPKG_ROOT$CONFFILE" | sed -e 's/ .*//')"
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old_md5sum="$(dpkg-query -W -f='${Conffiles}' "$PACKAGE" | \
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sed -n -e "\\'^ $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
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if [ "$md5sum" != "$old_md5sum" ]; then
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mv -f "$DPKG_ROOT$CONFFILE" "$DPKG_ROOT$CONFFILE.dpkg-backup"
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else
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mv -f "$DPKG_ROOT$CONFFILE" "$DPKG_ROOT$CONFFILE.dpkg-remove"
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fi
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}
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finish_rm_conffile() {
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local CONFFILE="$1"
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if [ -e "$DPKG_ROOT$CONFFILE.dpkg-backup" ]; then
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echo "Obsolete conffile $DPKG_ROOT$CONFFILE has been modified by you."
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echo "Saving as $DPKG_ROOT$CONFFILE.dpkg-bak ..."
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mv -f "$DPKG_ROOT$CONFFILE.dpkg-backup" "$DPKG_ROOT$CONFFILE.dpkg-bak"
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fi
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if [ -e "$DPKG_ROOT$CONFFILE.dpkg-remove" ]; then
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echo "Removing obsolete conffile $DPKG_ROOT$CONFFILE ..."
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rm -f "$DPKG_ROOT$CONFFILE.dpkg-remove"
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fi
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}
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abort_rm_conffile() {
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local CONFFILE="$1"
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local PACKAGE="$2"
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ensure_package_owns_file "$PACKAGE" "$CONFFILE" || return 0
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if [ -e "$DPKG_ROOT$CONFFILE.dpkg-remove" ]; then
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echo "Reinstalling $DPKG_ROOT$CONFFILE that was moved away"
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mv "$DPKG_ROOT$CONFFILE.dpkg-remove" "$DPKG_ROOT$CONFFILE"
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fi
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if [ -e "$DPKG_ROOT$CONFFILE.dpkg-backup" ]; then
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echo "Reinstalling $DPKG_ROOT$CONFFILE that was backed-up"
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mv "$DPKG_ROOT$CONFFILE.dpkg-backup" "$DPKG_ROOT$CONFFILE"
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fi
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}
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##
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## Functions to rename a conffile during upgrade
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##
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mv_conffile() {
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local OLDCONFFILE="$1"
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local NEWCONFFILE="$2"
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local LASTVERSION="$3"
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local PACKAGE="$4"
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if [ "$LASTVERSION" = "--" ]; then
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LASTVERSION=""
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PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE${DPKG_MAINTSCRIPT_ARCH:+:$DPKG_MAINTSCRIPT_ARCH}"
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fi
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if [ "$PACKAGE" = "--" -o -z "$PACKAGE" ]; then
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PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE${DPKG_MAINTSCRIPT_ARCH:+:$DPKG_MAINTSCRIPT_ARCH}"
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fi
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# Skip remaining parameters up to --
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while [ "$1" != "--" -a $# -gt 0 ]; do
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shift
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done
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[ $# -gt 0 ] || badusage "missing arguments after --"
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shift
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[ -n "$PACKAGE" ] || error "couldn't identify the package"
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[ -n "$1" ] || error "maintainer script parameters are missing"
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[ -n "$DPKG_MAINTSCRIPT_NAME" ] || \
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error "environment variable DPKG_MAINTSCRIPT_NAME is required"
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[ -n "$DPKG_MAINTSCRIPT_PACKAGE" ] || \
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error "environment variable DPKG_MAINTSCRIPT_PACKAGE is required"
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[ "${OLDCONFFILE}" != "${OLDCONFFILE#/}" ] || \
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error "old-conffile '$OLDCONFFILE' is not an absolute path"
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[ "${NEWCONFFILE}" != "${NEWCONFFILE#/}" ] || \
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error "new-conffile '$NEWCONFFILE' is not an absolute path"
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validate_optional_version "$LASTVERSION"
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debug "Executing $0 mv_conffile in $DPKG_MAINTSCRIPT_NAME" \
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"of $DPKG_MAINTSCRIPT_PACKAGE"
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debug "CONFFILE=$OLDCONFFILE -> $NEWCONFFILE PACKAGE=$PACKAGE" \
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"LASTVERSION=$LASTVERSION ACTION=$1 PARAM=$2"
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case "$DPKG_MAINTSCRIPT_NAME" in
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preinst)
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if [ "$1" = "install" -o "$1" = "upgrade" ] && [ -n "$2" ] &&
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dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
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prepare_mv_conffile "$OLDCONFFILE" "$PACKAGE"
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fi
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;;
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postinst)
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if [ "$1" = "configure" ] && [ -n "$2" ] &&
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dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
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finish_mv_conffile "$OLDCONFFILE" "$NEWCONFFILE" "$PACKAGE"
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fi
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;;
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postrm)
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if [ "$1" = "abort-install" -o "$1" = "abort-upgrade" ] &&
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[ -n "$2" ] &&
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dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
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abort_mv_conffile "$OLDCONFFILE" "$PACKAGE"
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fi
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;;
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*)
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debug "$0 mv_conffile not required in $DPKG_MAINTSCRIPT_NAME"
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;;
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esac
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}
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prepare_mv_conffile() {
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local CONFFILE="$1"
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local PACKAGE="$2"
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[ -e "$DPKG_ROOT$CONFFILE" ] || return 0
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ensure_package_owns_file "$PACKAGE" "$CONFFILE" || return 0
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local md5sum old_md5sum
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md5sum="$(md5sum "$DPKG_ROOT$CONFFILE" | sed -e 's/ .*//')"
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old_md5sum="$(dpkg-query -W -f='${Conffiles}' "$PACKAGE" | \
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sed -n -e "\\'^ $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
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if [ "$md5sum" = "$old_md5sum" ]; then
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mv -f "$DPKG_ROOT$CONFFILE" "$DPKG_ROOT$CONFFILE.dpkg-remove"
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fi
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}
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finish_mv_conffile() {
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local OLDCONFFILE="$1"
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local NEWCONFFILE="$2"
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local PACKAGE="$3"
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rm -f "$DPKG_ROOT$OLDCONFFILE.dpkg-remove"
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[ -e "$DPKG_ROOT$OLDCONFFILE" ] || return 0
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ensure_package_owns_file "$PACKAGE" "$OLDCONFFILE" || return 0
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echo "Preserving user changes to $DPKG_ROOT$NEWCONFFILE (renamed from $DPKG_ROOT$OLDCONFFILE)..."
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if [ -e "$DPKG_ROOT$NEWCONFFILE" ]; then
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mv -f "$DPKG_ROOT$NEWCONFFILE" "$DPKG_ROOT$NEWCONFFILE.dpkg-new"
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fi
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mv -f "$DPKG_ROOT$OLDCONFFILE" "$DPKG_ROOT$NEWCONFFILE"
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}
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abort_mv_conffile() {
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local CONFFILE="$1"
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local PACKAGE="$2"
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ensure_package_owns_file "$PACKAGE" "$CONFFILE" || return 0
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if [ -e "$DPKG_ROOT$CONFFILE.dpkg-remove" ]; then
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echo "Reinstalling $DPKG_ROOT$CONFFILE that was moved away"
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mv "$DPKG_ROOT$CONFFILE.dpkg-remove" "$DPKG_ROOT$CONFFILE"
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fi
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}
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##
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## Functions to replace a symlink with a directory
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##
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symlink_to_dir() {
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local SYMLINK="$1"
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local SYMLINK_TARGET="$2"
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local LASTVERSION="$3"
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local PACKAGE="$4"
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if [ "$LASTVERSION" = "--" ]; then
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LASTVERSION=""
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PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE${DPKG_MAINTSCRIPT_ARCH:+:$DPKG_MAINTSCRIPT_ARCH}"
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fi
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if [ "$PACKAGE" = "--" -o -z "$PACKAGE" ]; then
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PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE${DPKG_MAINTSCRIPT_ARCH:+:$DPKG_MAINTSCRIPT_ARCH}"
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fi
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# Skip remaining parameters up to --
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while [ "$1" != "--" -a $# -gt 0 ]; do
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shift
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done
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[ $# -gt 0 ] || badusage "missing arguments after --"
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shift
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[ -n "$DPKG_MAINTSCRIPT_NAME" ] || \
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error "environment variable DPKG_MAINTSCRIPT_NAME is required"
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[ -n "$DPKG_MAINTSCRIPT_PACKAGE" ] || \
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error "environment variable DPKG_MAINTSCRIPT_PACKAGE is required"
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[ -n "$PACKAGE" ] || error "cannot identify the package"
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[ -n "$SYMLINK" ] || error "symlink parameter is missing"
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[ "${SYMLINK#/}" = "$SYMLINK" ] && \
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error "symlink pathname is not an absolute path"
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[ "${SYMLINK%/}" = "$SYMLINK" ] || \
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error "symlink pathname ends with a slash"
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[ -n "$SYMLINK_TARGET" ] || error "original symlink target is missing"
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[ -n "$1" ] || error "maintainer script parameters are missing"
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validate_optional_version "$LASTVERSION"
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debug "Executing $0 symlink_to_dir in $DPKG_MAINTSCRIPT_NAME" \
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"of $DPKG_MAINTSCRIPT_PACKAGE"
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debug "SYMLINK=$SYMLINK -> $SYMLINK_TARGET PACKAGE=$PACKAGE" \
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"LASTVERSION=$LASTVERSION ACTION=$1 PARAM=$2"
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case "$DPKG_MAINTSCRIPT_NAME" in
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preinst)
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if [ "$1" = "install" -o "$1" = "upgrade" ] &&
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[ -n "$2" ] && [ -h "$DPKG_ROOT$SYMLINK" ] &&
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symlink_match "$SYMLINK" "$SYMLINK_TARGET" &&
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dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
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mv -f "$DPKG_ROOT$SYMLINK" "$DPKG_ROOT${SYMLINK}.dpkg-backup"
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fi
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;;
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postinst)
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# We cannot bail depending on the version, as here we only
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# know what was the last configured version, and we might
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# have been unpacked, then upgraded with an unpack and thus
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# never been configured before.
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if [ "$1" = "configure" ] &&
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[ -h "$DPKG_ROOT${SYMLINK}.dpkg-backup" ] &&
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symlink_match "${SYMLINK}.dpkg-backup" "$SYMLINK_TARGET"
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then
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rm -f "$DPKG_ROOT${SYMLINK}.dpkg-backup"
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fi
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;;
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postrm)
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if [ "$1" = "purge" ] && [ -h "$DPKG_ROOT${SYMLINK}.dpkg-backup" ]; then
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rm -f "$DPKG_ROOT${SYMLINK}.dpkg-backup"
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fi
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if [ "$1" = "abort-install" -o "$1" = "abort-upgrade" ] &&
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[ -n "$2" ] &&
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[ ! -e "$DPKG_ROOT$SYMLINK" ] &&
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[ -h "$DPKG_ROOT${SYMLINK}.dpkg-backup" ] &&
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symlink_match "${SYMLINK}.dpkg-backup" "$SYMLINK_TARGET" &&
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dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
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echo "Restoring backup of $DPKG_ROOT$SYMLINK ..."
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mv "$DPKG_ROOT${SYMLINK}.dpkg-backup" "$DPKG_ROOT$SYMLINK"
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fi
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;;
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*)
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debug "$0 symlink_to_dir not required in $DPKG_MAINTSCRIPT_NAME"
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;;
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esac
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}
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##
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## Functions to replace a directory with a symlink
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##
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dir_to_symlink() {
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local PATHNAME="${1%/}"
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local SYMLINK_TARGET="$2"
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local LASTVERSION="$3"
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local PACKAGE="$4"
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if [ "$LASTVERSION" = "--" ]; then
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LASTVERSION=""
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PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE${DPKG_MAINTSCRIPT_ARCH:+:$DPKG_MAINTSCRIPT_ARCH}"
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fi
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if [ "$PACKAGE" = "--" -o -z "$PACKAGE" ]; then
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PACKAGE="$DPKG_MAINTSCRIPT_PACKAGE${DPKG_MAINTSCRIPT_ARCH:+:$DPKG_MAINTSCRIPT_ARCH}"
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fi
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# Skip remaining parameters up to --
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while [ "$1" != "--" -a $# -gt 0 ]; do
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shift
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done
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[ $# -gt 0 ] || badusage "missing arguments after --"
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shift
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[ -n "$DPKG_MAINTSCRIPT_NAME" ] || \
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error "environment variable DPKG_MAINTSCRIPT_NAME is required"
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[ -n "$DPKG_MAINTSCRIPT_PACKAGE" ] || \
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error "environment variable DPKG_MAINTSCRIPT_PACKAGE is required"
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[ -n "$PACKAGE" ] || error "cannot identify the package"
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[ -n "$PATHNAME" ] || error "directory parameter is missing"
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[ "${PATHNAME#/}" = "$PATHNAME" ] && \
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error "directory parameter is not an absolute path"
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[ -n "$SYMLINK_TARGET" ] || error "new symlink target is missing"
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[ -n "$1" ] || error "maintainer script parameters are missing"
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validate_optional_version "$LASTVERSION"
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debug "Executing $0 dir_to_symlink in $DPKG_MAINTSCRIPT_NAME" \
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"of $DPKG_MAINTSCRIPT_PACKAGE"
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debug "PATHNAME=$PATHNAME SYMLINK_TARGET=$SYMLINK_TARGET" \
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"PACKAGE=$PACKAGE LASTVERSION=$LASTVERSION ACTION=$1 PARAM=$2"
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case "$DPKG_MAINTSCRIPT_NAME" in
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preinst)
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if [ "$1" = "install" -o "$1" = "upgrade" ] &&
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[ -n "$2" ] &&
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[ ! -h "$DPKG_ROOT$PATHNAME" ] &&
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[ -d "$DPKG_ROOT$PATHNAME" ] &&
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dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
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prepare_dir_to_symlink "$PACKAGE" "$PATHNAME"
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fi
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;;
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postinst)
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# We cannot bail depending on the version, as here we only
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# know what was the last configured version, and we might
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# have been unpacked, then upgraded with an unpack and thus
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# never been configured before.
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if [ "$1" = "configure" ] &&
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[ -d "$DPKG_ROOT${PATHNAME}.dpkg-backup" ] &&
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[ ! -h "$DPKG_ROOT$PATHNAME" ] &&
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[ -d "$DPKG_ROOT$PATHNAME" ] &&
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[ -f "$DPKG_ROOT$PATHNAME/.dpkg-staging-dir" ]; then
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finish_dir_to_symlink "$PATHNAME" "$SYMLINK_TARGET"
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fi
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;;
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postrm)
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if [ "$1" = "purge" ] &&
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[ -d "$DPKG_ROOT${PATHNAME}.dpkg-backup" ]; then
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rm -rf "$DPKG_ROOT${PATHNAME}.dpkg-backup"
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fi
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if [ "$1" = "abort-install" -o "$1" = "abort-upgrade" ] &&
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[ -n "$2" ] &&
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[ -d "$DPKG_ROOT${PATHNAME}.dpkg-backup" ] &&
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[ \( ! -h "$DPKG_ROOT$PATHNAME" -a \
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-d "$DPKG_ROOT$PATHNAME" -a \
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-f "$DPKG_ROOT$PATHNAME/.dpkg-staging-dir" \) -o \
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\( -h "$DPKG_ROOT$PATHNAME" -a \
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\( "$(readlink "$DPKG_ROOT$PATHNAME")" = "$SYMLINK_TARGET" -o \
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"$(dpkg-realpath "$PATHNAME")" = "$SYMLINK_TARGET" \) \) ] &&
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dpkg --compare-versions -- "$2" le-nl "$LASTVERSION"; then
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abort_dir_to_symlink "$PATHNAME"
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fi
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;;
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*)
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debug "$0 dir_to_symlink not required in $DPKG_MAINTSCRIPT_NAME"
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;;
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esac
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}
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prepare_dir_to_symlink()
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{
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local PACKAGE="$1"
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local PATHNAME="$2"
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local LINE
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# If there are conffiles we should not perform the switch.
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dpkg-query -W -f='${Conffiles}\n' "$PACKAGE" | while read -r LINE; do
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case "$LINE" in
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"$PATHNAME"/*)
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|
error "directory '$PATHNAME' contains conffiles," \
|
|
"cannot switch to symlink"
|
|
;;
|
|
esac
|
|
done
|
|
|
|
# If there are locally created files or files owned by another package
|
|
# we should not perform the switch.
|
|
export DPKG_MAINTSCRIPT_HELPER_INTERNAL_API="$version"
|
|
find "$DPKG_ROOT$PATHNAME" -print0 | \
|
|
xargs -0 -n1 "$0" _internal_pkg_must_own_file "$PACKAGE" || \
|
|
error "directory '$PATHNAME' contains files not owned by" \
|
|
"package $PACKAGE, cannot switch to symlink"
|
|
unset DPKG_MAINTSCRIPT_HELPER_INTERNAL_API
|
|
|
|
# At this point, we know that the directory either contains no files,
|
|
# or only non-conffiles owned by the package.
|
|
#
|
|
# To do the switch we cannot simply replace it with the final symlink
|
|
# just yet, because dpkg needs to remove any file present in the old
|
|
# package that have disappeared in the new one, and we do not want to
|
|
# lose files resolving to the same pathname in the symlink target.
|
|
#
|
|
# We cannot replace the directory with a staging symlink either,
|
|
# because dpkg will update symlinks to their new target.
|
|
#
|
|
# So we need to create a staging directory, to avoid removing files
|
|
# from other packages, and to trap any new files in the directory
|
|
# to move them to their correct place later on.
|
|
mv -f "$DPKG_ROOT$PATHNAME" "$DPKG_ROOT${PATHNAME}.dpkg-backup"
|
|
mkdir "$DPKG_ROOT$PATHNAME"
|
|
|
|
# Mark it as a staging directory, so that we can track things.
|
|
touch "$DPKG_ROOT$PATHNAME/.dpkg-staging-dir"
|
|
}
|
|
|
|
finish_dir_to_symlink()
|
|
{
|
|
local PATHNAME="$1"
|
|
local SYMLINK_TARGET="$2"
|
|
|
|
# Move the contents of the staging directory to the symlink target,
|
|
# as those are all new files installed between this package being
|
|
# unpacked and configured.
|
|
local ABS_SYMLINK_TARGET
|
|
if [ "${SYMLINK_TARGET#/}" = "$SYMLINK_TARGET" ]; then
|
|
ABS_SYMLINK_TARGET="$(dirname "$PATHNAME")/$SYMLINK_TARGET"
|
|
else
|
|
ABS_SYMLINK_TARGET="$SYMLINK_TARGET"
|
|
fi
|
|
rm "$DPKG_ROOT$PATHNAME/.dpkg-staging-dir"
|
|
find "$DPKG_ROOT$PATHNAME" -mindepth 1 -maxdepth 1 -print0 | \
|
|
xargs -0 -I% mv -f "%" "$DPKG_ROOT$ABS_SYMLINK_TARGET/"
|
|
|
|
# Remove the staging directory.
|
|
rmdir "$DPKG_ROOT$PATHNAME"
|
|
|
|
# Do the actual switch.
|
|
ln -s "$SYMLINK_TARGET" "$DPKG_ROOT$PATHNAME"
|
|
|
|
# We are left behind the old files owned by this package in the backup
|
|
# directory, just remove it.
|
|
rm -rf "$DPKG_ROOT${PATHNAME}.dpkg-backup"
|
|
}
|
|
|
|
abort_dir_to_symlink()
|
|
{
|
|
local PATHNAME="$1"
|
|
|
|
echo "Restoring backup of $DPKG_ROOT$PATHNAME ..."
|
|
if [ -h "$DPKG_ROOT$PATHNAME" ]; then
|
|
rm -f "$DPKG_ROOT$PATHNAME"
|
|
else
|
|
# The staging directory must be empty, as no other package
|
|
# should have been unpacked in between.
|
|
rm -f "$DPKG_ROOT$PATHNAME/.dpkg-staging-dir"
|
|
rmdir "$DPKG_ROOT$PATHNAME"
|
|
fi
|
|
|
|
mv "$DPKG_ROOT${PATHNAME}.dpkg-backup" "$DPKG_ROOT$PATHNAME"
|
|
}
|
|
|
|
# Common functions
|
|
validate_optional_version() {
|
|
local VERSION="$1"
|
|
|
|
if [ -z "$VERSION" ]; then
|
|
return
|
|
fi
|
|
|
|
if ! VERSIONCHECK=$(dpkg --validate-version -- "$VERSION" 2>&1); then
|
|
error "$VERSIONCHECK"
|
|
fi
|
|
}
|
|
|
|
ensure_package_owns_file() {
|
|
local PACKAGE="$1"
|
|
local FILE="$2"
|
|
|
|
if ! dpkg-query -L "$PACKAGE" | grep -F -q -x "$FILE"; then
|
|
debug "File '$FILE' not owned by package " \
|
|
"'$PACKAGE', skipping $command"
|
|
return 1
|
|
fi
|
|
return 0
|
|
}
|
|
|
|
internal_pkg_must_own_file()
|
|
{
|
|
local PACKAGE="$1"
|
|
local FILE="${2##"$DPKG_ROOT"}"
|
|
|
|
if [ "$DPKG_MAINTSCRIPT_HELPER_INTERNAL_API" != "$version" ]; then
|
|
error "internal API used by external command"
|
|
fi
|
|
|
|
if ! ensure_package_owns_file "$PACKAGE" "$FILE"; then
|
|
error "file '$FILE' not owned by package '$PACKAGE'"
|
|
fi
|
|
return 0
|
|
}
|
|
|
|
symlink_match()
|
|
{
|
|
local SYMLINK="$1"
|
|
local SYMLINK_TARGET="$2"
|
|
|
|
[ "$(readlink "$DPKG_ROOT$SYMLINK")" = "$SYMLINK_TARGET" ] || \
|
|
[ "$(dpkg-realpath "$SYMLINK")" = "$SYMLINK_TARGET" ]
|
|
}
|
|
|
|
usage() {
|
|
cat <<END
|
|
Usage: $PROGNAME <command> <parameter>... -- <maintainer-script-parameter>...
|
|
|
|
Commands:
|
|
supports <command>
|
|
Returns 0 (success) if the given command is supported, 1 otherwise.
|
|
rm_conffile <conffile> [<last-version> [<package>]]
|
|
Remove obsolete conffile. Must be called in preinst, postinst and
|
|
postrm.
|
|
mv_conffile <old-conf> <new-conf> [<last-version> [<package>]]
|
|
Rename a conffile. Must be called in preinst, postinst and postrm.
|
|
symlink_to_dir <pathname> <old-symlink-target> [<last-version> [<package>]]
|
|
Replace a symlink with a directory. Must be called in preinst,
|
|
postinst and postrm.
|
|
dir_to_symlink <pathname> <new-symlink-target> [<last-version> [<package>]]
|
|
Replace a directory with a symlink. Must be called in preinst,
|
|
postinst and postrm.
|
|
help
|
|
-?, --help
|
|
Show this help message.
|
|
--version
|
|
Show the version.
|
|
END
|
|
}
|
|
|
|
# Main code
|
|
set -e
|
|
|
|
PROGNAME=$(basename "$0")
|
|
version="1.21.1"
|
|
DPKG_ROOT=${DPKG_ROOT:+$(realpath "$DPKG_ROOT")}
|
|
# Remove default root dir.
|
|
if [ "$DPKG_ROOT" = "/" ]; then
|
|
DPKG_ROOT=""
|
|
fi
|
|
export DPKG_ROOT
|
|
|
|
PKGDATADIR_DEFAULT='/usr/share/dpkg'
|
|
PKGDATADIR="${DPKG_DATADIR:-$PKGDATADIR_DEFAULT}"
|
|
|
|
# shellcheck source=scripts/sh/dpkg-error.sh
|
|
. "$PKGDATADIR/sh/dpkg-error.sh"
|
|
|
|
setup_colors
|
|
|
|
command="$1"
|
|
[ $# -gt 0 ] || badusage "missing command"
|
|
shift
|
|
|
|
case "$command" in
|
|
supports)
|
|
case "$1" in
|
|
rm_conffile|mv_conffile|symlink_to_dir|dir_to_symlink)
|
|
code=0
|
|
;;
|
|
*)
|
|
code=1
|
|
;;
|
|
esac
|
|
if [ -z "$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 "$@"
|
|
;;
|
|
symlink_to_dir)
|
|
symlink_to_dir "$@"
|
|
;;
|
|
dir_to_symlink)
|
|
dir_to_symlink "$@"
|
|
;;
|
|
_internal_pkg_must_own_file)
|
|
# This is an internal command, must not be used outside this program.
|
|
internal_pkg_must_own_file "$@"
|
|
;;
|
|
--help|help|-?)
|
|
usage
|
|
;;
|
|
--version)
|
|
cat <<END
|
|
Debian $PROGNAME version $version.
|
|
|
|
This is free software; see the GNU General Public License version 2 or
|
|
later for copying conditions. There is NO warranty.
|
|
END
|
|
;;
|
|
*)
|
|
badusage "command $command is unknown
|
|
Hint: upgrading dpkg to a newer version might help."
|
|
esac
|
|
|
|
exit 0
|