Shell Programming and Scripting

bash <your_script>

#!/bin/bash

echo "$var1"
v1-1
v1-2
v1-3
v1-4
v1-5
v1-6
v1-7

echo "$var2"
v2-1
v2-2
v2-3
v2-4
v2-5
v2-6
v2-7
v2-8
v2-9

echo "$var1\n$var2" | \
awk '{
   if (NR <= a)
      x[NR] = $0
   else
      print x[++i], $0
} END {
   for (i++; x[i]; i++)
      print x[i]
}' a=$(echo "$var1" | wc -l)

awk 'BEGIN { while ( "unix.com" ) {	
  getline _ < ARGV[1] ||  (_ = "    ") && ++no
  getline   < ARGV[2] || ($0 = "    ") && ++more
  if (no && more) break
  print _, $0 }
}' <(printf '%s' "$v1") <(printf '%s' "$v2")

% print $v1
v1-1
v1-2
v1-3
v1-4
v1-5
v1-6
v1-7
% print $v2
v2-1
v2-2
v2-3
v2-4
v2-5
v2-6
v2-7
v2-8
v2-9
% awk 'BEGIN {
  while ( 42 ) {
  getline _ < ARGV[1] ||  (_ = "    ") && ++no
  getline   < ARGV[2] || ($0 = "    ") && ++more
  if (no && more) break
  print _, $0
    }
}' <(printf '%s' "$v1") <(printf '%s' "$v2")
v1-1 v2-1
v1-2 v2-2
v1-3 v2-3
v1-4 v2-4
v1-5 v2-5
v1-6 v2-6
v1-7 v2-7
     v2-8
     v2-9
% awk 'BEGIN {
  while ( -9 ) {
  getline _ < ARGV[1] ||  (_ = "    ") && ++no
  getline   < ARGV[2] || ($0 = "    ") && ++more
  if (no && more) break
  print _, $0
    }
}' <(printf '%s' "$v2") <(printf '%s' "$v1")
v2-1 v1-1
v2-2 v1-2
v2-3 v1-3
v2-4 v1-4
v2-5 v1-5
v2-6 v1-6
v2-7 v1-7
v2-8     
v2-9

#!/bin/ksh

IFS='
'

FINAL_RESULT=""

VARIABLE1="var1 first line
var1 second line
var1 third line
var1 forth line
var1 fifth line"

VARIABLE2="var2 first line
var2 second line
var2 third line
var2 forth line
var2 fifth line"

CURRENT_LINE_NUMBER=1
for ITERATOR in $VARIABLE1
do
    CURRENT_LINE_IN_VARIABLE2=$(print "$VARIABLE2"\
    |head -n $CURRENT_LINE_NUMBER|tail -n 1)    
    (( CURRENT_LINE_NUMBER = CURRENT_LINE_NUMBER + 1 ))
    FINAL_RESULT="$FINAL_RESULT\n$ITERATOR$CURRENT_LINE_IN_VARIABLE2"
done

(( FINAL_LENGTH = ${#FINAL_RESULT} - 2 ))
FINAL_RESULT=${FINAL_RESULT:2:FINAL_LENGTH}
print "$FINAL_RESULT"