Shell Programming and Scripting

awk 'BEGIN{printf "%-20s%-20s%-20s\n", "name", "role", "salary"; 
           print "================================================"}
     { printf "%-20s%-20s%-20s\n",$1,$2,$3}' FS=\/  infile

name                role                salary
================================================
arun                manager             200000
pradeep             engineer            10000
karthik             teamlead            30000

#!/bin/bash
F="==========="
echo -e "    name\trole\t   salary\n  $F$F$F"
while read -r l ; do
array=($(echo $l|sed 's/[/]/ /g' ));x=${array[@]}
array=();printf "%8s %12s %12s\n" $x ;arrpr=();done<$1

# cat file2
arun|manager|200000|test|test2
pradeep|engineer|10000|test|test2
karthik|teamlead|30000|test|test2

# ./justdoit FS='|' col1 col2 col3 col4 col5 file2
       col1        col2        col3        col4        col5
  =================================================================
       arun     manager      200000        test       test2
    pradeep    engineer       10000        test       test2
    karthik    teamlead       30000        test       test2

# ./justdoit FS='/' col1 col2 col3 col4 file2
FS separator is maybe incorrect!!
# ./justdoit FS='|' col1 col2 col3 col4
input file is maybe missing!!
# ./justdoit FS='|' col1 col2 col3 col4 file2
usage : e.g. ./justdoit FS='|' col1 col2 ... col5 inputfile
# ./justdoit FS='|' file2
column names is maybe missing!!

# cat justdoit
#!/bin/bash
F="=============";f=${#};ff=$(eval echo '$'$f)
if [ ! -f $ff ] ; then echo "input file is maybe missing!!" ;exit 1;fi
if [ $# -eq 0 ] ; then echo "usage : e.g. $0 FS="X" col1 col2 ... colx inputfile";exit 1;
elif [ $# -eq 2 ] ; then echo "column names is maybe missing!!" ;exit 1 ;fi
FS=$(echo "$1"|sed "s/FS=\(.\)$/\1/")
[[ $(echo "$FS"|grep -o "[[:punct:]]") ]] || echo "FS is in non-punctuation characters!!"
c=$(sed -n '1s/['$FS']/\n/gp' $ff|sed -n '$=')
if [ -z $c ] ; then echo "FS separator is maybe incorrect!!" ; exit 1; fi
if [ $((c+2)) -ne $f ] ; then echo "usage : e.g. $0 FS='"$FS"' col1 col2 ... col$c inputfile";exit 1;fi
for((i=2;i<=$((c+1));i++)) ; do FF=(${FF[@]}$F) ; X=(${X[@]} "\$$i")
par=(${par[@]} %11s) ; done ;x=${par[@]}
printf "$x\n %s\n" $(eval echo "${X[@]}") " ${FF[@]}"
while read -r l ; do
array=($(echo $l|sed 's/['$FS']/ /g' ))
printf "$x\n" ${arrpr[@]};array=();done<$ff

while IFS='/' read -ra Line
do printf '%8s %12s %12s\n' "${Line[@]}"
done < file