Bash, read line by line from file, with IFS

Question

I\'m having this code from http://bash.cyberciti.biz/guide/While_loop, used to read line by line from a file

file=/etc/resolv.conf
while IFS= read -r line
         


        

Answer 1

In the third example on that page, setting IFS to null prevents word splitting which makes that code not work. Here is that code:

while IFS= read -r field1 field2 field3 ... fieldN
do
    command1 on $field1
    command2 on $field1 and $field3
    ..
    ....
    commandN on $field1 ... $fieldN
done < "/path/to dir/file name with space"

As written, all the words on the line are stored in field1 and field2, etc., are empty. Change the line to this and it will work properly:

while read -r field1 field2 field3 ... fieldN