security.d/chk_pkgs

#!/bin/bash
#
# $Id$
#
#############################################################################
# Copyright (C) 2005-2007
#   
# Michiel Broek               <mbse@mbse.eu>
# Beekmansbos 10
# 1971 BV IJmuiden
# the Netherlands
#
# This file is part of SlackSecCheckSripts.
#
# This package 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, or (at your option) any
# later version.
#
# SlackSecCheckSripts 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 MBSE BBS; see the file COPYING.  If not, write to the Free
# Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
#############################################################################

PATH=/sbin:/usr/sbin:/bin:/usr/bin

umask 077
TZ=UTC; export TZ
LANG=C; export LANG

SECUREDIR=`mktemp -d /tmp/_securedir.XXXXXX` || exit 1

trap "/bin/rm -rf $SECUREDIR ; exit 0" EXIT INT QUIT PIPE

if ! cd "$SECUREDIR"; then
    echo "Can not cd to $SECUREDIR".
    exit 1
fi

backup_dir=/var/cache/sscs
pkgdb_dir=/var/log/packages

mkdir -p "$backup_dir"

CURR=${backup_dir}/pkgs.current
BACK=${backup_dir}/pkgs.backup
TMP1=$SECUREDIR/tmp1
TMP2=$SECUREDIR/tmp2

if [ ! -f $CURR ]; then
    # No database, install new database
    ( cd $pkgdb_dir
      /bin/ls -ld --full-time * | sort -k9 > $CURR
    )
    exit
fi

# Database is present, create temp database
#
( cd $pkgdb_dir
  /bin/ls -ld --full-time * | sort -k9 > $TMP1
)
changed=0

join -v 1 -j 9 $TMP1 $CURR > $TMP2
if [ -s $TMP2 ]; then
    printf "\nNew installed packages:\n"
    cat $TMP2 | awk '{ printf "\t%s\n", $1 }'
    changed=1
fi

join -v 1 -j 9 $CURR $TMP1 > $TMP2
if [ -s $TMP2 ]; then
    printf "\nRecent removed packages:\n"
    cat $TMP2 | awk '{ printf "\t%s\n", $1 }'
    changed=1
fi


# If changes were seen, update the database
#
if [ "$changed" == "1" ]; then
    cat $CURR > $BACK
    cat $TMP1 > $CURR
fi