#!/bin/sh# Recovering a Debian system without any backup of /var/lib/dpkg.# ref: http://www.linuxworld.com/2003/0113.petreley.html# ---------------------------------------------------------------------- # (C) 2003, Karsten M. Self kmself@ix.netcom.com# (C) 2003, Osamu Aoki osamu@debian.org (fixup)## 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, write to the Free Software# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307# USA# ---------------------------------------------------------------------- # Changes:## KMself: Sun Dec 7 15:40:44 PST 2003# Removed bashisms (again).# Added /var//cache/apt/archives/partial# ---------------------------------------------------------------------- export PATH=/usr/sbin:/usr/bin:/sbin:/bincat <<-EOF Copyright 2003, Karsten M. Self and Osamu Aoki This is free software with ABSOLUTELY NO WARRANTY. This script attempts to rebuild your package database and create portions of /var which have been damaged or deleted. While it _should_ provide sufficient /var structure to get your system up and running, it *CANNOT* restore the data you'd had under /var, other than can be imputed from your package status. This works by using the directories under /usr/share/doc to impute packages you'd previously had installed. This works because Debian Policy requires every package to create a documentation directory here. What *WON'T* be preserved are: - "Held" package status. All installed packages will be in mode "install", not "hold". Manually adjust if necessary. - Package version. You will install the current version of packages for your particular release, as represented in your archive source. Additional packages may also be installed if dependencies have changed in your selected release. - Package pinning. If you've pinned any packages to a particular release, you'll have to restore this setting manually. Installation will be of your default pin release. There's sanity checking to prevent overwriting any directories which exist. Decide if you want to preserve any such directories or modify the script at "Create a minimal /var structure" below. EOFecho -e "Continue? [yN] \c"read anscase $ans in [Yy]*) ;; *) exit;;esac# Let's (not) be verbose....# set -v# Test existence of any subdirs in /var. If they exist, exit, otherwise# risk destroying an active system. If they don't exist, the remainder# of this script is safe.function create_new_dir () { if [ ! -f $1 ] && [ ! -d $1 ] then mkdir $1 else echo "$1 exists, aborting" 1>&2 exit 1 fi}# Create a minimal /var structureecho -e "\nCreating stub /var/lib/dpkg directories..."for d in \ /var/lib/dpkg/info \ /var/lib/dpkg/parts \ /var/lib/dpkg/alternatives \ /var/lib/dpkg/methods \ /var/lib/dpkg/updatesdo create_new_dir $ddone# Create a rudimentary status fileecho -e "\nCreating a rudimentary status file..."cat <<-EOF > /var/lib/dpkg/status Package: libc6 Status: install ok installed Version: 2.3.1-9 EOF# Update package cacheecho -e "\nUpdating package cache..."apt-get updateapt-get dist-upgrade# Register as installed crucial packages.echo -e "\nRegistering crucial packages..."dpkg --clear-availapt-get updateapt-get dist-upgradecd /var/cache/apt/archivesdpkg -i libncurses*dpkg -i perl-base*dpkg -i libstdc++*dpkg -i dselect*dpkg -i dpkg*# Reinstall libc to register it.echo -e "\nReinstalling libc6..."apt-get install --reinstall libc6# Reinstall base packages.echo -e "\nReinstalling base packages..."apt-get dist-upgrade# Generate list of installed packages to re-register previously# installed packages as installed, using /usr/share/doc as a fallback# package registry. ref: dpkg -l $( ls /usr/share/doc | grep -v [A-Z] )# >/dev/nullecho -e "\nSpecifying list of previously installed packages..."ls /usr/share/doc | grep -v [A-Z] | grep -v '^texmf$' | grep -v '^debian$' | awk '{print $1 " install"}' | dpkg --set-selections# Re-register everything.echo -e "\nRe-registering all previously installed packages with apt-get..."apt-get dist-upgrade# At this point, you should be (mostly) cooking on gas.cat <<-EOF $( basename $0) complete. Please check your system and make any manual adjustments necessary. EOF