Shell Programming and Scripting

#!/bin/sh
touch test
size=`ls -lrt file1 | awk '{print $5}'`
while [ "$size" -gt 0 ]
do
    sed -n 1,14 file1 >> test
    sed  '1,14d' file1 >testing1.tmp
    cat testing1.tmp >file1
    rm testing1.tmp
    sed -n 1,14p file2 >> test
    sed  '1,14d' file2 >testing2.tmp
    cat testing2.tmp >file2
    rm testing2.tmp
    size=`ls -lrt file1 | awk '{print $5}'`
done
echo " Files merged successfully "

awk '1; !(NR%14) {for (i=1; i<=14; i++)  {getline < F2; print}}' F2=file2 file1

#!/usr/bin/awk -f
BEGIN {
File2 = ARGV[2]
    --ARGC
    }
    {
        print
            if((FNR % 14) == 0) {
                for(n=1; n<=14; ++n) {
                            getline <File2
                                    print
                                        }
                                            }
                                            }
                                            END {
                                                while (getline <File2)  print
                                                }

awk '
function FLOK() {return (1 == getline < F2)}
1
!(NR%14)        {for (; (++i)%15 && FLOK();) print}
END             {while (FLOK()) print}
' F2=file2 file1