Shell Programming and Scripting

#!/bin/bash

# setting default path
PATH="/usr/bin:/bin:/usr/sbin"
NOW=$(date +"%Y-%m-%d")

LOG_FILE=/tmp/myemail.txt
FILE_NOT_FOUND="/tmp/missingfiles.txt"
CURRENT_FILE="/tmp/currentfiles.txt"
OLD_FILE="/tmp/oldfiles.txt"

# make sure we create a new copy of these files
rm -f $LOG_FILE $FILE_NOT_FOUND $CURRENT_FILE $OLD_FILE 

# List the directories and files to process. 

DIR="dir1 dir2"

FILE="file 1 file 2"



#############################

# Define functions

#############################



function checkStat

{

    # make sure stat command is installed

    which stat > /dev/null 2>&1

    if [ $? -eq 1 ]; then
        echo "stat command not found!"
        exit 2
    fi

}



function processFile

{

    if [ -s ${1} ]; then
        VAR="$(stat -c %y ${1})"
        VAR2="${VAR:0:10}"

    FILE_TIME=$(ls -l $1| cut -d" " -f6,7)
    FILE_SIZE=$(du -sh $1 | cut -f1)
        if [ $NOW == $VAR2 ]; then
            echo "Current File Found: ${1} $FILE_TIME - SIZE $FILE_SIZE" | tee -a ${CURRENT_FILE}
        else
            erroremail=1
            echo "Old File Found: ${1} $FILE_TIME SIZE - $FILE_SIZE" | tee -a ${OLD_FILE}
        fi

    else
        erroremail=1
        echo "File Not Found: ${1}" | tee -a ${FILE_NOT_FOUND}
    fi



}



#############################

# Main

#############################



# Verify the stat command exists

checkStat



# Create log file

touch  ${LOG_FILE}



# Process the files

for d in ${DIR[@]}; do
    for f in ${FILE[@]}; do
        processFile "${d}/${f}"
    done
done



#############

#Email 

#############



if [ $erroremail -eq 1 ] ; then

       SUBJECT="ERROR: File Problem"

else

       SUBJECT="OK: File Current"

fi

# lets populate the sendmail files

echo "To:someone@nowhere.com" >>$LOG_FILE
echo "Subject:$SUBJECT" >> $LOG_FILE
# Append list of current files to Email body
# Make sure we display error message only once

error_display=false
# Append list of old files to Email body
if [ -s $OLD_FILE ]; then
    echo "*********************ERROR MESSAGES********************" >> $LOG_FILE
    error_display=true    
    echo "List of old files" >> $LOG_FILE
    cat $OLD_FILE >> $LOG_FILE
fi
        
# blank lines between two data
echo >> $LOG_FILE
echo >> $LOG_FILE

# Append list of missing files to Email body
if [ -s $FILE_NOT_FOUND ]; then
    if [ "$error_display" = "false" ]; then
        echo "*********************ERROR MESSAGES********************" >> $LOG_FILE
    fi        
    echo "List of missing files" >> $LOG_FILE
    cat $FILE_NOT_FOUND >> $LOG_FILE
fi
# blank lines between two data
echo >> $LOG_FILE
echo >> $LOG_FILE

if [ -s $CURRENT_FILE ]; then
    echo "****************GOOD MESSAGES*************************" >> $LOG_FILE
    echo "List of current files" >> $LOG_FILE
    cat $CURRENT_FILE >> $LOG_FILE
fi

    

# send an email using /sbin/sendmail

sendmail -t < $LOG_FILE

if [ $? -eq 0 ]; then
    echo "Sent mail successfully"
else
    echo "Error sending mail"
fi

# cleanup files
rm -f   $LOG_FILE $FILE_NOT_FOUND $CURRENT_FILE $OLD_FILE

FILE_SIZE=$(du -sh $1 | cut -f1)

FILE_SIZE=$(ls -l $1 | cut -d" " -f5)

FILE_TIME=$(ls -l $1| cut -d" " -f6,7)