1#!/bin/sh
2#
3# Copyright (c) 2001  The FreeBSD Project
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions
8# are met:
9# 1. Redistributions of source code must retain the above copyright
10#    notice, this list of conditions and the following disclaimer.
11# 2. Redistributions in binary form must reproduce the above copyright
12#    notice, this list of conditions and the following disclaimer in the
13#    documentation and/or other materials provided with the distribution.
14#
15# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25# SUCH DAMAGE.
26#
27# $FreeBSD: src/etc/periodic/security/security.functions,v 1.1.2.2 2002/11/19 19:00:39 thomas Exp $
28#
29
30#
31# Show differences in the output of an audit command
32#
33
34LOG="${daily_status_security_logdir}"
35rc=0
36
37# Usage: COMMAND | check_diff [new_only] LABEL - MSG
38#        COMMAND > TMPFILE; check_diff [new_only] LABEL TMPFILE MSG
39#   if $1 is new_only, show only the 'new' part of the diff.
40#   LABEL is the base name of the ${LOG}/${label}.{today,yesterday} files.
41
42check_diff() {
43  rc=0
44  if [ "$1" = "new_only" ]; then
45    shift
46    filter="grep '^>'"
47  else
48    filter="cat"
49  fi
50  label="$1"; shift
51  tmpf="$1"; shift
52  msg="$1"; shift
53
54  if [ "${tmpf}" = "-" ]; then
55    tmpf=`mktemp ${TMPDIR:-/tmp}/security.XXXXXXXXXX`
56    cat > ${tmpf}
57  fi
58
59  if [ ! -f ${LOG}/${label}.today ]; then
60    rc=1
61    echo ""
62    echo "No ${LOG}/${label}.today"
63    cp ${tmpf} ${LOG}/${label}.today || rc=3
64  fi
65
66  if ! cmp -s ${LOG}/${label}.today ${tmpf} >/dev/null; then
67    [ $rc -lt 1 ] && rc=1
68    echo ""
69    echo "${msg}"
70    diff -b ${LOG}/${label}.today ${tmpf} | eval "${filter}"
71    mv ${LOG}/${label}.today ${LOG}/${label}.yesterday || rc=3
72    mv ${tmpf} ${LOG}/${label}.today || rc=3
73  fi
74
75  rm -f ${tmpf}
76  exit ${rc}
77}
78