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for line in $(cat file); do
  foo=$(echo $line | awk '{print $2}')
  bar=$(echo $line | awk '{print $3}')
  doo=$(echo $line | awk '{print $3}')
  echo $foo whatever $doo $bar
done

for line in $(cat file); do
  foo=$(echo $line | awk '{print $2}')
  bar=$(echo $line | awk '{print $3}')
  doo=$(echo $line | awk '{print $5}')
  echo $foo whatever $doo $bar
done

while IFS= read -r line; do
    someprog -f "$line"
done < input.txt

<input.txt tr '\n' '\0' | xargs -r0 -n1 someprog -f 

while IFS= read -r line; do
    someprog -f "$line"
done < file-list.txt

<file-list.txt tr '\n' '\0' | xargs -r0 -n1 someprog -f 

Or with GNU xargs:

xargs -rd '\n' -n1 -a file-list.txt someprog -f

< tr '\n' '\0' | xargs -0 -n1 someprog -f 

<input.txt tr '\n' '\0' | xargs -r0 -n1 someprog -f