#! /bin/sh
# postinst script for #PACKAGE#
#
# see: dh_installdeb(1)

set -e

# summary of how this script can be called:
#        * <postinst> `configure' <most-recently-configured-version>
#        * <old-postinst> `abort-upgrade' <new version>
#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
#          <new-version>
#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
#          <failed-install-package> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package
#
# quoting from the policy:
#     Any necessary prompting should almost always be confined to the
#     post-installation script, and should be protected with a conditional
#     so that unnecessary prompting doesn't happen if a package's
#     installation fails and the `postinst' is called with `abort-upgrade',
#     `abort-remove' or `abort-deconfigure'.

to_lower()
{
  word="$1"
  lcword=$(echo "$word" | tr A-Z a-z)
  echo "$lcword"
}

is_true()
{
  var="$1"
  lcvar=$(to_lower "$var")
  [ 'true' = "$lcvar" ] || [ 'yes' = "$lcvar" ] || [ 1 = "$lcvar" ]
  return $?
}

ucf_cleanup()
{
  # This only does something if I've fucked up before
  # Not entirely impossible :(

  configfile=$1

  if [ `grep "$configfile" /var/lib/ucf/hashfile | wc -l` -gt 1 ]; then
    grep -v "$configfile" /var/lib/ucf/hashfile > /var/lib/ucf/hashfile.tmp
    grep "$configfile" /var/lib/ucf/hashfile | tail -n 1  >> /var/lib/ucf/hashfile.tmp
    mv /var/lib/ucf/hashfile.tmp /var/lib/ucf/hashfile
  fi
}

add_to_ucf()
{
  configfile=$1
  ucffile=$2

  if ! grep -q "$configfile" /var/lib/ucf/hashfile; then
    md5sum $configfile >> /var/lib/ucf/hashfile
    cp $configfile $ucffile
  fi
}

ucf_upgrade_check()
{
  configfile=$1
  sourcefile=$2
  ucffile=$3

  if [ -f "$configfile" ]; then
    add_to_ucf $configfile $ucffile
    ucf --three-way --debconf-ok "$sourcefile" "$configfile"
  else
    [ -d /var/lib/ucf/cache ] || mkdir -p /var/lib/ucf/cache
    cp $sourcefile $configfile
    add_to_ucf $configfile $ucffile
  fi
}

slurp_config()
{
  CLAMAVCONF="$1"
  
  if [ -e "$CLAMAVCONF" ]; then
    for variable in `egrep -v '^[[:space:]]*(#|$)' "$CLAMAVCONF" | awk '{print $1}'`; do
      if [ "$variable" = 'DatabaseMirror' ]; then
        if [ -z "$DatabaseMirror" ]; then
          for i in `grep ^$variable $CLAMAVCONF | awk '{print $2}'`; do
            value="$i $value"
          done
        else
          continue
        fi
      elif [ "$variable" = 'IncludePUA' ]; then
        if [ -z "$IncludePUA" ]; then
          for i in `grep ^$variable $CLAMAVCONF | awk '{print $2}'`; do
            value="$i $value"
          done
        else
          continue
        fi
      elif [ "$variable" = 'ExcludePUA' ]; then
        if [ -z "$ExcludePUA" ]; then
          for i in `grep ^$variable $CLAMAVCONF | awk '{print $2}'`; do
            value="$i $value"
          done
        else
          continue
        fi
      elif [ "$variable" = 'VirusEvent' ] || [ "$variable" = 'OnUpdateExecute' ] || [ "$variable" = 'OnErrorExecute' ]; then
        value=`grep ^$variable $CLAMAVCONF | head -n1 | sed -e s/$variable\ //`
      else
        value=`grep ^$variable $CLAMAVCONF | head -n1 | awk '{print $2}'`
      fi
      if [ -z "$value" ]; then 
        export "$variable"="true"
      elif [ "$value" != "$variable" ]; then
        export "$variable"="$value"
      else
        export "$variable"="true"
      fi
      unset value
    done
  fi
}

make_dir()
{
  DIR=$1
  if [ -d "$DIR" ]; then
    return 0;
  fi
  [ -n "$User" ] || User=clamav
  mkdir -p -m 0755 "$DIR"
  chown "$User:$User" "$DIR"
}



case "$1" in
  configure)

  CLAMAVCONF=/etc/clamav/clamd.conf
  DEBROTATEFILE=/var/lib/clamav/clamdrotate.debconf
  CLAMAVROTATEFILE=/etc/logrotate.d/clamav-daemon
  
  slurp_config "$CLAMAVCONF"

  if [ -n "$LogFile" ]; then
    if echo "$LogFile" | grep -q '^/dev/'; then
      make_logrotate=false
    else
      make_logrotate=true
    fi
    [ -n "$User" ] || User=clamav
    if [ "$make_logrotate" = 'true' ]; then
      echo "$LogFile {" > $DEBROTATEFILE
      echo "     rotate 12" >> $DEBROTATEFILE
      echo "     weekly" >> $DEBROTATEFILE
      echo "     compress" >> $DEBROTATEFILE
      echo "     delaycompress" >> $DEBROTATEFILE
      echo "     create 640  $User adm" >> $DEBROTATEFILE
      echo "     postrotate" >> $DEBROTATEFILE
      echo "     /etc/init.d/clamav-daemon reload-log > /dev/null" >> $DEBROTATEFILE
      echo "     endscript" >> $DEBROTATEFILE
      echo "     }" >> $DEBROTATEFILE
      touch "$LogFile"
      chown "$User":adm "$LogFile"
      chmod 0640 "$LogFile"
      ucf_cleanup "$CLAMAVROTATEFILE"
      ucf_upgrade_check "$CLAMAVROTATEFILE" "$DEBROTATEFILE" /var/lib/ucf/cache/:etc:logrotate.d:clamav-daemon
      rm -f $DEBROTATEFILE
    else
      if [ -e "$CLAMAVROTATEFILE" ]; then
        echo "Disabling old logrotate script for clamav-daemon"
        mv "$CLAMAVROTATEFILE" "$CLAMAVROTATEFILE".dpkg-old
        ucf -p "$CLAMAVROTATEFILE"
      fi
    fi
  else
    if [ -e "$CLAMAVROTATEFILE" ]; then
      echo "Disabling old logrotate script for clamav-daemon"
      mv "$CLAMAVROTATEFILE" "$CLAMAVROTATEFILE".dpkg-old
      ucf -p "$CLAMAVROTATEFILE"
    fi
  fi

  ;;
  abort-upgrade|abort-remove|abort-deconfigure)
  ;;
  *)
  echo "postinst called with unknown argument \`$1'" >&2
  exit 1
  ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

# Automatically added by dh_installinit
if [ -x "/etc/init.d/clamav-daemon" ]; then
	update-rc.d clamav-daemon defaults >/dev/null
	if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
		invoke-rc.d clamav-daemon start || exit $?
	else
		/etc/init.d/clamav-daemon start || exit $?
	fi
fi
# End automatically added section


exit 0