#!/bin/bash
# Filename:      ${GRML_FAI_CONFIG}/config/scripts/GRMLBASE/98-clean-chroot
# Purpose:       clean up chroot system
# Authors:       grml-team (grml.org), (c) Michael Prokop <mika@grml.org>
# Bug-Reports:   see http://grml.org/bugs/
# License:       This file is licensed under the GPL v2.
################################################################################

set -u
set -e

if ! ls $target/boot/config-* &>/dev/null ; then
  echo "No kernel config files (/boot/config-*) found. No kernel-image package installed?" >&2
  exit 1
fi

echo "Creating ~/.zshrc"
touch $target/root/.zshrc

$ROOTCMD rm -f /etc/apt/apt.conf.d/90grml-apt-proxy.conf

if [ -x $target/usr/sbin/localepurge ] ; then
  echo "Running localepurge"
  $ROOTCMD localepurge
else
  echo "Warning: localepurge not installed"
fi

# revert dpkg-divert of hooks/instsoft.GRMLBASE, which is
# used to work around /etc/kernel/postinst.d/zz-update-grub failing
# inside openvz environment, see #597084
if $ROOTCMD dpkg-divert --list | grep -q '/usr/sbin/update-grub' ; then
  echo "Undoing dpkg-divert of update-grub executable"
  $ROOTCMD rm -f /usr/sbin/update-grub
  $ROOTCMD dpkg-divert --rename --remove /usr/sbin/update-grub
fi

# revert udev workaround of hooks/updatebase.GRMLBASE
if grep -q 'updatebase.GRMLBASE' ${target}/etc/udev/kernel-upgrade 2>/dev/null ; then
  echo "Removing /etc/udev/kernel-upgrade created by updatebase.GRMLBASE"
  $ROOTCMD rm -f /etc/udev/kernel-upgrade
fi

echo "Removing /var/lib/apt/lists/*-stuff, dpkg-status-old and pkgcache.bin"
rm -f $target/var/lib/apt/lists/*Packages \
      $target/var/lib/apt/lists/*Release \
      $target/var/lib/apt/lists/*Sources \
      $target/var/lib/apt/lists/*IndexDiff \
      $target/var/lib/apt/lists/*.gpg \
      $target/var/cache/apt-show-versions/* \
      $target/var/cache/debconf/templates.dat-old \
      $target/var/cache/apt/*.bin

echo "Cleaning apt places"
$ROOTCMD apt-get check 2>/dev/null
$ROOTCMD dpkg --clear-avail
$ROOTCMD apt-cache gencaches 2>/dev/null
$ROOTCMD apt-get clean

rm -f $target/var/lib/dpkg/status-old $target/var/lib/dpkg/available-old

if ! [ -x $target/usr/bin/grep-dctrl ] ; then
  echo "Warning: grep-dctrl not installed"
else
  echo "Cleaning up /var/lib/dpkg/status"
  if $ROOTCMD grep-dctrl -v -F Status "purge ok not-installed" \
    /var/lib/dpkg/status > $target/var/lib/dpkg/status.new ; then
    mv $target/var/lib/dpkg/status.new $target/var/lib/dpkg/status
    chmod 644 $target/var/lib/dpkg/status
    chown root:root $target/var/lib/dpkg/status
  fi
fi

echo "Removing host ssh-keys"
rm -f $target/etc/ssh/*key*

echo "Removing dbus machine-id"
rm -f $target/var/lib/dbus/machine-id

if [ -d $target/var/spool/squid/ ] ; then
  echo "Cleaning /var/spool/squid/0*"
  rm -rf $target/var/spool/squid/0*
fi

echo "Cleaning and removing some misc files and directories"
find $target/etc -type f -name *.pre_fcopy -delete
rm -rf --one-file-system $target/etc/sysconfig/* \
       $target/etc/motd.dpkg-* $target/etc/auto.master.*dpkg* \
       $target/etc/samba/*.SID $target/etc/samba/*.tdb \
       $target/var/log/ksymoops/* \
       $target/var/state/* $target/var/log/nessus/* \
       $target/halt $target/reboot $target/ash.static \
       $target/etc/dhcpc/*.info $target/etc/dhcpc/resolv* \
       $target/etc/*passwd- $target/etc/*shadow- \
       $target/etc/*group- $target/var/spool/postfix/maildrop/* \
       $target/etc/*.old $target/etc/*.original \
       $target/etc/lvm/.cache $target/etc/lvm/cache/.cache \
       $target/etc/lvm/backup/main $target/tmp/* \
       $target/var/tmp/* $target/var/backups/* \
       $target/var/lib/mysql $target/var/log/lilo_log.* $target/core*

# remove only "temporary" or saved files in the given directories
nuke(){
  for i in $(find "$@" -name \*.gz -o -name \*.bz2 -o -name \*.0 2>/dev/null); do
    rm -f --one-file-system "$i"
  done
}

# set all files in the given directories to a length of zero
zero(){
  for i in $(find "$@" -type f -size +0 -not -name \*.ini -not -path '*/fai/*' 2>/dev/null); do
    :> "$i"
  done
}

echo "Cleaning log and cache directories"
nuke ${target}/var/log       ${target}/var/cache
zero ${target}/var/account/pacct \
     ${target}/var/cache/man \
     ${target}/var/lib/games \
     ${target}/var/lib/nfs   \
     ${target}/var/lib/xkb   \
     ${target}/var/local     \
     ${target}/var/log       \
     ${target}/var/mail/grml

# on /run we don't have to create it
if [ -d ${target}/var/run ] ; then
  echo "Recreate empty utmp and wtmp"
  :>${target}/var/run/utmp
  :>${target}/var/run/wtmp
fi

if ! [ -x $target/usr/sbin/update-ca-certificates ] ; then
  echo "Warning: update-ca-certificates not installed"
else
  echo "Updating ca-certificates"
  $ROOTCMD update-ca-certificates
fi

# regenerate ls.so.cache
if ! [ -x $target/sbin/ldconfig ] ; then
  echo "Warning: ldconfig not installed"
else
  echo "Updating ld.so.cache"
  $ROOTCMD ldconfig
fi

if ! [ -x $target/usr/bin/update-menus ] ; then
  echo "Warning: update-menus not installed"
else
  echo "Updating windowmanager menus"
  $ROOTCMD update-menus -v
fi

if ! [ -x $target/usr/bin/mandb ] ; then
  echo "Warning: mandb not installed"
else
  echo "Updating mandb"
  $ROOTCMD mandb -c
  $ROOTCMD man doesnotexist >/dev/null 2>&1 || true
fi

if ! [ -d $target/var/lib/clamav/ ] ; then
  echo "Warning: clamav[-freshclam] not installed"
else
  echo "Cleaning /var/lib/clamav/"
  $ROOTCMD rm -rf /var/lib/clamav/clamav-*

  echo "Setting up daily.cvd and main.cvd symlinks"
  if [ -f $target/var/lib/clamav/daily.cvd ] ; then
    mkdir -p $target/usr/share/doc/clamav-freshclam/examples/
    ln -sf /var/lib/clamav/daily.cvd $target/usr/share/doc/clamav-freshclam/examples/
    ln -sf /var/lib/clamav/main.cvd  $target/usr/share/doc/clamav-freshclam/examples/
  fi
fi

if ! [ -r $target/etc/ld.so.nohwcap ] ; then
   echo "Creating /etc/ld.so.nohwcap"
   touch $target/etc/ld.so.nohwcap
fi

# installation of resolvconf in chroot *with* /proc
# is different from an installation without /proc,
# so make sure it is OK in any case
if ! [ -d $target/etc/resolvconf ] ; then
  echo "Warning: resolvconf not installed"
else
  echo "Setting up resolvconf"
  if [ -L $target/etc/resolvconf/run ] ; then # resolvconf with /run
    # /etc/resolvconf/run symlinks to /run/resolvconf
    RESOLV_CONF=/run/resolvconf/
  else # no /run present
    RESOLV_CONF=/etc/resolvconf/run/
  fi

  rm -rf   ${target}/${RESOLV_CONF}
  mkdir -p ${target}/${RESOLV_CONF}

  touch ${target}/${RESOLV_CONF}/enable-updates
  mkdir ${target}/${RESOLV_CONF}/interface

  cat > ${target}/${RESOLV_CONF}/resolv.conf << EOF
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
EOF
fi

if ! $ROOTCMD test -x /usr/bin/updatedb ; then
  echo "Warning: updatedb not installed"
else
  echo "Updating locate-database"
  $ROOTCMD updatedb --prunepaths='/tmp /usr/tmp /var/tmp /grml /root /proc /sys'
fi

## END OF FILE #################################################################
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