Shell Programming and Scripting

nawk -F "|" '{gsub("004","IND",$2)}1' OFS="|" filename

nawk -F "|" '{gsub("004","IND",$2)}1' OFS="|" p.txt

av|IND|adkf|Kent,004|s
av|005|ssdf|Kd,IT park|s

004,IND
005,SL
006,BNG
007,PAK
008,AFG

av|004|adkf|Kent,004|s
av|005|ssdf|Kd,IT park|s
.
.
.

av|IND|adkf|Kent,004|s
av|SL|ssdf|Kd,IT park|s
.
.
.

 
cat country_code.txt | while read line ; do  
     code="$(echo "$line" | cut -d ',' -f1)"
     country="$(echo "$line" | cut -d ',' -f2)"
 nawk -F "|" '{gsub("$code","$country",$2)}1' OFS="|" p.txt > output1.txt
done

awk: syntax error near line 1
awk: bailing out near line 1
awk: syntax error near line 1
awk: bailing out near line 1
awk: syntax error near line 1
awk: bailing out near line 1
awk: syntax error near line 1
awk: bailing out near line 1
awk: syntax error near line 1
awk: bailing out near line 1

IFS=,;
while read str rep; 
do 
awk -F "|" -v str=$str -v rep=$rep '$2 == str {gsub(str,rep,$2);print}' OFS="|" file2 ; done < file3

 
#!/bin/bash

echo "Enter input file "
read fname
TFILE=$fname
 

cat country_code.txt | while read line ; do  
     code="$(echo "$line" | cut -d ',' -f1)"
     country="$(echo "$line" | cut -d ',' -f2)"
     cat "$TFILE"|cut -f4 | sed -e 's/'"$code"'/'"$country"'/1' > "${TFILE}".tmp
     mv $"${TFILE}.tmp" "$TFILE"
     echo LINE=${line} CODE=${code} COUNTRY=${country}   
done