Magic file that redirects to standard output

Question

Is there a magic file name that gives the following effect?

$ mkfifo /tmp/fifo1 && cat /tmp/fifo1 &
$ foo --log-file /tmp/fifo
# now I can see the log as the program runs

I want something like

$ foo --log-file /proc/to_stdout

Answer 1

You're looking for /dev/stdout or /dev/stderr as appropriate.