Shell Programming and Scripting

 1.DE 1.TXT
2.DE 2.TXT
3.DE 3.TXT
4.DE 4.TXT
5.Fe.ok

filename=0
while [ $filename -lt 100 ]
do
        if [ ! -f "${filename}" ]
        then
                echo "File missing: ${filename}"
                break
        fi
        filename2="5.Fe.ok"
        if [ ! -f "${filename2}" ]
        then
                echo "File missing: ${filename2}"
                break
        fi
        #
        cp "${filename}" /usr/dob
        cp "${filename2}" /usr/dob
        /pathname/my_script.ksh; ERROR=$?
        if [ ! ${ERROR} -eq 0 ]
        then
                echo "Error from /pathname/my_script.ksh"
                break
        fi
done

i=0
while [ $i -lt 100 ]
do
    filename=$i.DE
    filenametgt=$i.TXT

        if [ ! -f "${filename}" ]
        then
                echo "File missing: ${filename}"
                break
        fi
        filename2="5.Fe.ok"
        if [ ! -f "${filename2}" ]
        then
                echo "File missing: ${filename2}"
                break
        fi

        cp "${filename}" /usr/dob/${filenametgt}
        cp "${filename2}" /usr/dob

        if ( ! /pathname/my_script.ksh >/dev/null 2>&1 )
        then
                echo "Error from /pathname/my_script.ksh"
                break
        fi
    let i+=1
done

ls -1 !(*.Fe.ok) | sort -k 1n | while read a
do
        [[ $(ls *.Fe.ok 2>/dev/null | wc -l) -ne 1 ]] && echo "no uniq *.Fe.ok file found" && break
        cp $a *.Fe.ok /usr/dob/
        if ( ! /pathname/my_script.ksh >/dev/null 2>&1 )
        then
                echo "Error from /pathname/my_script.ksh"
                break
        fi
done

1.DE.1.TXT
2.DE.2.TXT
3.DE.3.TXT
4.DE.4.TXT
5.Fe.ok

chk_file(){
RC=0
[[ ! -f "$1" ]] && echo "File missing: $1" && RC=1
return $RC
}

i=0
while [ $i -lt 100 ]
do
    filename="$i.DE.$i.TXT"
    filename2=$(ls *.Fe.ok | tail -1)
        
    chk_file "${filename}" || break
    chk_file "${filename2}" || break

    cp "${filename}" "${filename2}" /usr/dob

    if ( ! /pathname/my_script.ksh >/dev/null 2>&1 )
    then
            echo "Error from /pathname/my_script.ksh"
            break
    fi

    let i+=1
done

0.DE.0.TXT
1.DE.1.TXT
...
10.DE.10.TXT
12.DE.12.TXT