How to use `while read` (Bash) to read the last line in a file if there’s no newline at the end of the file?

Question

Let’s say I have the following Bash script:

while read SCRIPT_SOURCE_LINE; do
  echo \"$SCRIPT_SOURCE_LINE\"
done

I noticed that for files

Answer 1

Instead of read, try to use GNU Coreutils like tee, cat, etc.

from stdin

readvalue=$(tee)
echo $readvalue

from file

readvalue=$(cat filename)
echo $readvalue