Shell Programming and Scripting

#!/bin/ksh 
#############################################################################
# 7_script.ksh
# This script will generate unix space utilisation report
#############################################################################
### Date ########
CURRENT_DT=$(date +"%Y%m%d_%H%M%S")
CURRENT_DT_MAIL=$(date +"%m-%d-%Y")
TS=$(date +"%H%M%S")
# Test if shell script is being invoked from directory where script resides or from a different directory
if [[ $(dirname ${0}) = . ]] then
CURRDIR=$PWD
PROGNAME=${0}
PROGDIR=${CURRDIR}
else
CURRDIR=${0}
PROGNAME=$(basename ${CURRDIR})
PROGDIR=$(dirname ${CURRDIR})
fi
### Create file to save the output ###
OFILE=${CURRDIR}/unix_message_test${TS}.txt
########### Getting path as input file and running a loop for getting the files greater than 1GB in the input paths########
IPATH=${CURRDIR}/unix_path.txt
for paths in `cat ${IPATH}`
do
USRSMSG=`find ${paths} -type f -size +1073741824c -ls >> ${OFILE}` #### files greater than 1GB
done
exec 1>> ${USRSMSG}
exec 2>&1
　
######## Sending the o/p as e-mail ##########
　
# USERS=`ls -ld /home/*/ |cut -c 17-24 > ${CURRDIR}/users_list.txt` ## to get the list of users from df-k
USERS=${CURRDIR}/users_list.txt ### input file which has the mail recipients###
for user in `cat ${USERS}`
do
MAILTO=${user}@abc.com
CONTENT=${OFILE}
SUBJECT="****Urgent**** Action Required | Unix Space Utilization | ${CURRENT_DT_MAIL}"
(
echo "To: ${MAILTO}"
echo "From: test@abc.com"
echo "Subject: ${SUBJECT}"
echo "MIME-Version: 1.0"
echo "Content-Type: text"
echo "Content-Disposition: inline"
cat ${CONTENT}
) | /usr/sbin/sendmail -t
done
# mailx -s "****Urgent**** Action Required | Unix Space Utilization | ${CURRENT_DT_MAIL}" test@abc.com < ${OFILE}
echo "Mail sent successfully.."

a 2312321 TS filename.txt
b 2423423 TS filename.txt
b 7676575 TS filename.txt
b 7567544 TS filename.txt
c 2435346 TS filename.txt
d 9786544 TS filename.txt

cut -f 1 -d ' '

a
b
b
b
c
d

grep

uniq

for user in `cat ${USERS}`
do
MAILTO="${user}@abc.com"
#echo `cat ${OFILE}| grep ${user}`
CONTENT=`cat ${OFILE}| grep ${user}`
SUBJECT="****Urgent**** Action Required | Unix Space Utilization | ${CURRENT_DT_MAIL}"
(echo "To: ${MAILTO}"
echo "From: `whoami`@abc.com" 
echo "Subject: ${SUBJECT}"
echo "MIME-Version: 1.0"
echo "Content-Type: text"
echo "Content-Disposition: inline"
echo ${CONTENT}
) | /usr/sbin/sendmail -t
done