bash: tee eats newlines after exec

Question

To output both stdout and stderr from a script to the console and to a log file, I’ve found a beautiful solution with tee:

exec &> >(tee log.file)

The problem is, that sometimes tee seems to be eating newlines. For example, I have a trap on exit that prints a newline and only then exits.

trap "echo && exit 55" EXIT HUP INT QUIT KILL

It makes the shell print the prompt from the new line instead of wherever user might have pressed ^C while the script was running. And it doesn’t work, when there’s such a call to exec.

Answer 1

This method redirects stderr to stdout then pipes to tee. I think it's a little more readable.

exec 2>&1 | tee log.file

I've tested this on my machine and haven't encountered the "newline eating" problem.

Answer 2

tee is most likely being killed by the signal before receiving the newline.