bash cleanup

#!/bin/bash

LOG_DIR=/var/log

ROOT_UID=0

LINE=50

E_XCD=66

E_NOTROOT=67



if [ "$UID" -ne "$ROOT_UID" ]

then

echo "Must be root to run this script."

exit $E_NOTROOT

fi



if [ -n "$1" ]

then

lines=$1

else

lines=$LINES

fi



cd $LOG_DIR



if [ `pwd` != "$LOG_DIR" ]

then

echo "Can't change to $LOG_DIR."

exit $E_XCD

fi



tail -$lines messages > mesg.temp

mv mesg.temp messages



cat /dev/null > wtmp





echo "Logs cleaned up."



exit 0