UNIX for Dummies Questions & Answers

aaa bbb ccc ddd
eee fff  ggg  ddd
www eee ggg dde
qqq zzz hhh ddd

mmm
mmm
mmm
mmm

aaa bbb ccc ddd mmm
eee fff  ggg  ddd mmm
www eee ggg dde
qqq zzz hhh ddd mmm

awk '{getline x < f} $NF=="ddd"{$0=$0 FS x} {print}' f=file2 file1 > file3

use strict;
use warnings;

open(FH,"<file1") or die "Can't open";
open(FH1,"<file2") or die "Can't open";
open(FH2,">file3") or die "Can't open";
my($var,$var1);
while($var=<FH>)
{
    $var1=<FH1>;
    chomp($var);
    if($var=~/ddd$/)
    {
      $var=$var." $var1";
      print FH2 $var;
    }
    else
    {
    print FH2 $var."\n";
    }
}

#!/bin/sh
counter=0;
lineno=1;
> file3
while read line; do
        if `echo ${line} | grep "ddd$" 1>/dev/null 2>&1`
        then
                value=`sed -n "${lineno}p" file2`
                oval=` echo $line | sed -r "s/(.*)/\1 ${value}/g" `
                echo $oval >> file3
                lineno=`expr $lineno + 1`
        else
                echo $line >> file3
        fi
done < file1