Two file Comparison with while .sh

Question

The script written in sh is used to compare the columns of two different files and give the output.

File 1 content

9999
0
2
3

File 2 content

SDC 4
abc 0
abx 2
cdf 3

Script logic

 while read Colm_1_File1 <&3 && Colm_1_File2 Colm_2_File2 <&4

     do

     Check_Count_File1=$Colm_1_File1

     v_File_Name=$Colm_1_File2

     Check_Count_File2=$Colm_1_File2

     if [ "$Check_Count_File1" -eq "$Check_Count_File2" ]

      then

      echo "$v_File_Name:- OK" 
      elif [ "$Colm_1_File1" -eq "9999" ]

      then

      echo "$v_File_Name File Missing"

      else

      echo "$v_File_Name:- NOK" 

     fi

     done 3<File1 4<File2 

The if condition only works from "0"; any other number that is equal doesn't match. elif and else behave as expected.

Answer 1

THis is what you need, your variable name Colm_1_File2 is written two times, hence the issue

while read Colm_1_File1 <&3 && read Colm_1_File2 Colm_2_File2 <&4
 do
 Check_Count_File1=$Colm_1_File1
 v_File_Name=$Colm_1_File2
 Check_Count_File2=$Colm_2_File2
 if [ "$Check_Count_File1" -eq "$Check_Count_File2" ]
  then
  echo "$v_File_Name:- OK"
  elif [ "$Colm_1_File1" -eq "9999" ]
  then
  echo "$v_File_Name File Missing"
  else
  echo "$v_File_Name:- NOK"
 fi
 done 3<File1 4<File2