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Add -n to the netstat invocation.  Faster running, less chance of being spoofed, no unneeded dial-on-demands

#!/bin/sh -
#
#	$OpenBSD: daily,v 1.35 2001/03/06 20:29:48 niklas Exp $
#	From: @(#)daily	8.2 (Berkeley) 1/25/94
#
PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin
host=`hostname -s`
bak=/var/backups

if [ -f /etc/daily.local ]; then
	echo ""
	echo "Running daily.local:"
	. /etc/daily.local
fi

TMP=`mktemp /tmp/_daily.XXXXXX` || exit 1
OUT=`mktemp /tmp/_security.XXXXXX` || exit 1

trap 'rm -f $TMP $OUT' 0 1 15

echo ""
echo "Removing scratch and junk files:"
if [ -d /tmp -a ! -L /tmp ]; then
	cd /tmp && {
	find -x . \( -name 'ssh-*' -o -name '.X11-unix' \) -prune -o \
	    -type f -atime +3 -execdir rm -f -- {} \;
	find -x . ! -name . -type d -mtime +1 -execdir rmdir -- {} \; \
	    >/dev/null 2>&1; }
fi

if [ -d /var/tmp -a ! -L /var/tmp ]; then
	cd /var/tmp && {
	find -x . \( -name 'ssh-*' -o -name '.X11-unix' \) -prune -o \
	    ! -type d -atime +7 -execdir rm -f -- {} \;
	find -x . ! -name . -type d -mtime +1 -execdir rmdir -- {} \; \
	    >/dev/null 2>&1; }
fi

# Additional junk directory cleanup would go like this:
#if [ -d /scratch -a ! -L /scratch ]; then
#	cd /scratch && {
#	find . ! -name . -atime +1 -execdir rm -f -- {} \;
#	find . ! -name . -type d -mtime +1 -execdir rmdir -- {} \; \
#	    >/dev/null 2>&1; }
#fi

if [ -d /var/preserve -a ! -L /var/preserve ]; then
	cd /var/preserve && {
	find . ! -name . -mtime +7 -execdir rm -f -- {} \; ; }
fi

if [ -d /var/rwho -a ! -L /var/rwho ] ; then
	cd /var/rwho && {
	find . ! -name . -mtime +7 -execdir rm -f -- {} \; ; }
fi

#find / \( ! -fstype local -o -fstype rdonly -o -fstype fdesc \
#		-o -fstype kernfs -o -fstype procfs \) -a -prune -o \
#	-name 'lost+found' -a -prune -o \
#	-name '*.core' -a -print -o \
#	\( -name '[#,]*' -o -name '.#*' -o -name a.out \
#	   -o -name '*.CKP' -o -name '.emacs_[0-9]*' \) \
#		-a -atime +3 -a -execdir rm -f -- {} \; -a -print > $TMP

if egrep -q '\.core$' $TMP; then
	echo ""
	echo "Possible core dumps:"
	egrep '\.core$' $TMP
fi

if egrep -qv '\.core$' $TMP; then
	echo ""
	echo "Deleted files:"
	egrep -v '\.core$' $TMP
fi

if [ -d /var/msgs -a ! -L /var/msgs ]; then
	msgs -c
fi

if [ -s /etc/news.expire ]; then
	/etc/news.expire
fi

if [ -f /var/account/acct ]; then
	echo ""
	echo "Purging accounting records:"
	mv /var/account/acct.2 /var/account/acct.3
	mv /var/account/acct.1 /var/account/acct.2
	mv /var/account/acct.0 /var/account/acct.1
	cp /var/account/acct /var/account/acct.0
	sa -sq
fi

# If ROOTBACKUP is set to 1 in the environment, and
# if filesystem named /altroot is type ffs, on /dev/* and mounted "xx",
# use it as a backup root filesystem to be updated daily.
[ "X$ROOTBACKUP" = X1 ] && {
	rootdev=`awk '$2 == "/" && $1 ~ /^\/dev\// && $3 == "ffs" && \
	    $4 ~ /rw/ \
		 { print substr($1, 6) }' < /etc/fstab`
	rootbak=`awk '$2 == "/altroot" && $1 ~ /^\/dev\// && $3 == "ffs" && \
	    $4 ~ /xx/ \
		{ print substr($1, 6) }' < /etc/fstab`
	[ X$rootdev != X -a X$rootbak != X ] && {
		sync
		echo ""
		echo "Backing up root filesystem:"
		echo "copying /dev/r$rootdev to /dev/r$rootbak"
		dd if=/dev/r$rootdev of=/dev/r$rootbak bs=16b seek=1 skip=1 \
			conv=noerror
		fsck -y /dev/r$rootbak
	}
}

echo ""
if [ -d /var/yp/binding -a ! -d /var/yp/`domainname` -o "X$CALENDAR" = X0 ]
then
	if [ "X$CALENDAR" = X0 ]; then
		echo "Not running calendar, (disabled)."
	else
		echo "Not running calendar, (yp client)."
	fi
else
	echo "Running calendar in the background."
	calendar -a &
fi

# Rotation of mail log now handled automatically by cron and 'newsyslog'

if [ -d /var/spool/uucp -a -f /etc/uuclean.daily ]; then
	echo ""
	echo "Cleaning up UUCP:"
	echo /etc/uuclean.daily | su daemon
fi

echo ""
echo "Checking subsystem status:"
echo ""
echo "disks:"
df -k
echo ""
dump W
echo ""

mailq > $TMP
if ! grep -q "^/var/spool/mqueue is empty$" $TMP; then
	echo ""
	echo "mail:"
	cat $TMP
fi

if [ -d /var/spool/uucp ]; then
	uustat -a > $TMP
	if [ -s $TMP ]; then
		echo ""
		echo "uucp:"
		cat $TMP
	fi
fi

echo ""
echo "network:"
netstat -ivn
echo ""

t=/var/rwho/*
if [ "$t" != '/var/rwho/*' ]; then
	echo ""
	ruptime
fi

# If CHECKFILESYSTEMS is set to 1 in the environment, run fsck
# with the no-write flag.
[ "X$CHECKFILESYSTEMS" = X1 ] && {
	echo ""
	echo "Checking filesystems:"
	fsck -n | grep -v '^\*\* Phase'
}

if [ -f /etc/Distfile ]; then
	echo ""
	echo "Running rdist:"
	if [ -d /var/log/rdist ]; then
		logf=`date +%Y.%b.%e`
		rdist -f /etc/Distfile 2>&1 | tee /var/log/rdist/$logf
	else
		rdist -f /etc/Distfile 
	fi
fi

sh /etc/security 2>&1 > $OUT
if [ -s $OUT ]; then
    mail -s "$host daily insecurity output" root < $OUT
fi