Asynchronous tee

Question

I would like to write the same information in two pipes, but I do not want to wait until the first channel reads. Here is an example

mkfifo one
mkfifo two
echo hi | tee one two &
cat one &
cat two &

cat onedoes not start until it is launched cat two. Can I run cat onewithout waiting?

Answer 1

Problem: Fifos are blocked until open for reading . So just open the read FD:

mkfifo one two
echo hi | tee one two &
exec 3<one
exec 4<two
cat <&3
cat <&4

Answer 2

echo hi | tee one | tee two &