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#
28
29# This is a library file, so we only try to do something when sourced.
30case "$0" in
31*/security.functions) exit 0 ;;
32esac
33
34security_daily_compat_var security_status_logdir
35security_daily_compat_var security_status_diff_flags
36
37#
38# Show differences in the output of an audit command
39#
40
41LOG="${security_status_logdir}"
42rc=0
43
44# Usage: COMMAND | check_diff [new_only] LABEL - MSG
45#        COMMAND > TMPFILE; check_diff [new_only] LABEL TMPFILE MSG
46#   if $1 is new_only, show only the 'new' part of the diff.
47#   LABEL is the base name of the ${LOG}/${label}.{today,yesterday} files.
48
49check_diff() {
50  unset IFS
51  rc=0
52  if [ "$1" = "new_only" ]; then
53    shift
54    filter="grep '^[>+][^+]'"
55  else
56    filter="cat"
57  fi
58  label="$1"; shift
59  tmpf="$1"; shift
60  msg="$1"; shift
61
62  if [ "${tmpf}" = "-" ]; then
63    tmpf=`mktemp -t security`
64    cat > ${tmpf}
65  fi
66
67  if [ ! -f ${LOG}/${label}.today ]; then
68    rc=1
69    echo ""
70    echo "No ${LOG}/${label}.today"
71    cp ${tmpf} ${LOG}/${label}.today || rc=3
72  fi
73
74  if ! cmp -s ${LOG}/${label}.today ${tmpf} >/dev/null; then
75    [ $rc -lt 1 ] && rc=1
76    echo ""
77    echo "${msg}"
78    diff ${security_status_diff_flags} ${LOG}/${label}.today \
79	${tmpf} | eval "${filter}"
80    mv ${LOG}/${label}.today ${LOG}/${label}.yesterday || rc=3
81    mv ${tmpf} ${LOG}/${label}.today || rc=3
82  fi
83
84  rm -f ${tmpf}
85  exit ${rc}
86}
87