Parser deux fichiers dans script sh

#!/bin/bash
# doit.sh
#
test -n "$3" || { echo "$0 <fichier_1> <fichier_2> <fichier_output>"; exit 1; }

RND1="$(( ( RANDOM % 100000 )  + 10000 ))"
RND2="$(( ( RANDOM % 100000 )  + 10000 ))"
touch /tmp/${RND1}
touch /tmp/${RND2}

while read -r line
do
    echo $line | awk -F '\\|' '{ print $2 "|" $1 "|" "site" "|" $4 "|" $5 "|" $6 }' >> /tmp/${RND1}
done < $2

cat "$1" |while read -r line
do
 site=`echo $line |  awk -F '\\|' '{ printf $3 }'`

 tmp=`echo $line | awk -F '\\|' '{ print $1 "|" $2 "|" "site" "|" $4 }'` 
 count=$(cat "/tmp/${RND1}" |grep "$tmp" |wc -l)

 if [[ $count = 1 ]]
 then
  cat "/tmp/${RND1}" |grep "$tmp" |awk -v site="$site" -F '\\|' '{ print $1 "|" $2 "|" site "|" $4 "|" $5 "|" $6 }' >> /tmp/${RND2}
 fi
done

/bin/cp "/tmp/${RND2}" "$3"
/bin/rm "/tmp/${RND1}"
/bin/rm "/tmp/${RND2}"
 

join