#!/bin/sh -
# 
# Description: FreeBSD comes with the following script that is run
#              weekly as part of its periodic weekly security scripts.
#              However, their version of the script does NOT ignore
#              .zfs/snapshot directories. On a system with limited
#              resources, this can lead to a "kmem_map too small" 
#              kernel panic when this script runs. Somehow, ZFS
#              kernel memory usage explodes when performing recursive
#              find operations on .zfs snapshot locations. This
#              is the modified version of that script, which excludes
#              searching in .zfs snapshot directories.
# Usage: Replace the FreeBSD version of the script with this one:
#        /etc/periodic/security/100.chksetuid
#
# Copyright (c) 2001  The FreeBSD Project
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD: src/etc/periodic/security/100.chksetuid,v 1.8.14.1 2008/01/29 00:22:33 dougb Exp $
#

# If there is a global system configuration file, suck it in.
#
if [ -r /etc/defaults/periodic.conf ]
then
    . /etc/defaults/periodic.conf
    source_periodic_confs
fi

. /etc/periodic/security/security.functions

rc=0

case "$daily_status_security_chksetuid_enable" in
    [Yy][Ee][Ss])
	echo ""
	echo 'Checking setuid files and devices:'
	# XXX Note that there is the possibility of overrunning the args to ls
	MP=`mount -t ufs,zfs | egrep -v " no(suid|exec)" | awk '{ print $3 }' | sort`
	if [ -n "${MP}" ]
	then
	    set ${MP}
	    while [ $# -ge 1 ]; do
	        mount=$1
                shift
                dotzfs=`echo "$mount" | grep "\.zfs"`
 		[ -n "$dotzfs" ] && continue;
	        find $mount -xdev -type f \
			\( -perm -u+x -or -perm -g+x -or -perm -o+x \) \
			\( -perm -u+s -or -perm -g+s \) -print0
	    done | xargs -0 -n 20 ls -liTd | sed 's/^ *//' | sort -k 11 |
	      check_diff setuid - "${host} setuid diffs:"
	    rc=$?
	fi;;
    *)	rc=0;;
esac

exit $rc