Shell Programming and Scripting

#!/usr/local/bin/ksh93
#
# UNIX Monitor Script
# Purpose: Monitors the changes in a directory
# Outputs: Log file
# Author : Steven Koh
# Modified by Stev.H
#*********************************************************
#

if test $# -lt 1; then
echo "Usage: $0 <DIR TO MONITOR FOR NEW FILES>"
echo "Example: $0 /var/tmp"
echo
exit 0;
fi

MONITOR_DIR=$1
LOG_DIR="log"
NEW_LOG="${LOG_DIR}/mon_file.log"
OLD_LOG="${LOG_DIR}/mon_file.old"
ADD_FILE="${LOG_DIR}/mon_file.add"
DEL_FILE="${LOG_DIR}/mon_file.del"


if test ${MONITOR_DIR}="./"; then
MONITOR_DIR=`pwd`
fi

if [[ -d $LOG_DIR ]]; then
#if directory log exist then print nothing
print
else
mkdir ${LOG_DIR}
fi

touch ${NEW_LOG}
mv ${NEW_LOG} ${OLD_LOG}

print "============= `date` =============\n${MONITOR_DIR}:" | tee $NEW_LOG
unalias ls
ls -ailR ${MONITOR_DIR} | tee -a ${NEW_LOG}
#egrep -vf ${OLD_LOG} ${NEW_LOG} | grep -v "=============" > ${DIFF_FILE} 2>&1
comm -23 ${OLD_LOG} ${NEW_LOG} | grep -v "=============" > ${DEL_FILE} 2>&1
comm -13 ${OLD_LOG} ${NEW_LOG} | grep -v "=============" > ${ADD_FILE} 2>&1

if test `wc -l < ${DEL_FILE}` -gt 0; then
echo "Monitor files been deleted in ${MONITOR_DIR}"
echo "=================================="
echo
cat ${DEL_FILE}
elif test `wc -l < ${ADD_FILE}` -gt 0; then
echo "Monitor files been added in ${MONITOR_DIR}"
echo "=================================="
echo
cat ${ADD_FILE}
fi