file_format=xxx_xxxx_?????????????????_?????????????????_YYYY-MM-DD-HHIISS.txt
prog_name="abd_voda_"
interval=10

 #checking before . extension
YearFormat=$(echo $file_format | sed 's/X//g;s/x//g;s/_*$//g;s/^_*//g' | awk 'BEGIN{FS=".";}{for (i = 1; i <= NF; i++){if ( $i ~ /YY/ ){print $i;}}}' | sed 's/X//g;s/x//g;s/_*$//g;s/^_*//g' | head -1)
YearFormat_count=$(echo $YearFormat | wc -l)
echo "YearFormat-$YearFormat"
if [[ $YearFormat_count -lt 1 ]]; then
echo "enter proper year format"
exit 0
fi
 #exit is missing here
month_count=0;y_count=0;d_count=0;hour_count=0;min_count=0;sec_count=0
for (( i=0; i<${#YearFormat}; i++ )); do
year=$(echo "${YearFormat:$i:1}")
if [[ $year == 'Y' ]];then
y_count=`expr $y_count + 1`
fi
if [[ $year == 'M' ]];then
month_count=`expr $month_count + 1`
fi
if [[ $year == 'D' ]];then
d_count=`expr $d_count + 1`
fi
if [[ $year == 'H' ]];then
hour_count=`expr $hour_count + 1`
fi
if [[ $year == 'I' ]];then
min_count=`expr $min_count + 1`
fi
if [[ $year == 'S' ]];then
sec_count=`expr $sec_count + 1`
fi
done

 #Remove the duplicates
cleandateFormat=$(echo $YearFormat | tr -s 'A-Z') #YmD_HMS
echo $cleandateFormat
if [[ $y_count -eq 2 ]]; then
cleandateFormat=$(echo $cleandateFormat | sed 's/Y/y/g;s/M/m/g;s/D/d/g;s/I/M/g')
elif [[ $y_count -eq 4 ]]; then
cleandateFormat=$(echo $cleandateFormat | sed 's/M/m/g;s/D/d/g;s/I/M/g')
else
echo "enter correct year format"
exit 0
fi
 #maintain format including special character as seperator
finalFormat=""
for (( i=0; i<${#cleandateFormat}; i++ )); do
f_year=$(echo "${cleandateFormat:$i:1}")
echo "char : $f_year"
if [[ $f_year == [a-zA-Z] ]];then
temp=$(echo $f_year | sed 's/^/%/g')
finalFormat="$finalFormat$temp"
echo "IF : $finalFormat"
else
finalFormat="$finalFormat$f_year"
fi
done

if [[ $check_mode -eq 1 ]]
then
missing_count=0
day_count=0
while [[ $interval -ne 0 ]]; do
finalFormat=$(echo "$finalFormat" | sed -r 's/[HMS]+//g;s/%*$//g;s/-*$//g;s/_*$//g')
start=`date +${finalFormat} -d "$interval day ago"`
IFS=$','
for path in ${file_path}; do
count=$(ls -l /bin/daily/voda_files/${prog_name}*${start}* 2>/dev/null | wc -l)
if [[ $count -gt 0 ]]
then
break
fi
done
unset IFS
if [[ $count -eq 0 ]]
then
missing_count=`expr $missing_count + 1`
file_name="${start}"
printf "$file_name\n"
fi
interval=`expr $interval - 1`
done >missingfiles.txt
fi