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 1.5 2005/08/22 09:33:36 cperciva Exp $
28# $DragonFly: src/etc/periodic/security/security.functions,v 1.3 2007/12/29 21:44:44 matthias Exp $
29#
30
31#
32# Show differences in the output of an audit command
33#
34
35LOG="${daily_status_security_logdir}"
36rc=0
37
38# Usage: COMMAND | check_diff [new_only] LABEL - MSG
39#        COMMAND > TMPFILE; check_diff [new_only] LABEL TMPFILE MSG
40#   if $1 is new_only, show only the 'new' part of the diff.
41#   LABEL is the base name of the ${LOG}/${label}.{today,yesterday} files.
42
43check_diff() {
44  rc=0
45  if [ "$1" = "new_only" ]; then
46    shift
47    filter="grep '^[>+]'"
48  else
49    filter="cat"
50  fi
51  label="$1"; shift
52  tmpf="$1"; shift
53  msg="$1"; shift
54
55  if [ "${tmpf}" = "-" ]; then
56    tmpf=`mktemp -t security`
57    cat > ${tmpf}
58  fi
59
60  if [ ! -f ${LOG}/${label}.today ]; then
61    rc=1
62    echo ""
63    echo "No ${LOG}/${label}.today"
64    cp ${tmpf} ${LOG}/${label}.today || rc=3
65  fi
66
67  if ! cmp -s ${LOG}/${label}.today ${tmpf} >/dev/null; then
68    [ $rc -lt 1 ] && rc=1
69    echo ""
70    echo "${msg}"
71    diff ${daily_status_security_diff_flags} ${LOG}/${label}.today \
72	${tmpf} | eval "${filter}"
73    mv ${LOG}/${label}.today ${LOG}/${label}.yesterday || rc=3
74    mv ${tmpf} ${LOG}/${label}.today || rc=3
75  fi
76
77  rm -f ${tmpf}
78  exit ${rc}
79}
80