Look here:

  $ echo xxx | tee >(xargs test -n); echo $?
xxx
0
  $ echo xxx | tee >(xargs test -z); echo $?
xxx
0

and look here:

  $echo xxx | tee >(xargs test -z; echo  "${PIPESTATUS[*]}")
xxx
123
  $echo xxx | tee >(xargs test -n; echo  "${PIPESTATUS[*]}")
xxx
0

That is?

See also Pipe status after command substitution

Look here:

  $ echo xxx | tee >(xargs test -n); echo $?
xxx
0
  $ echo xxx | tee >(xargs test -z); echo $?
xxx
0

and look here:

  $echo xxx | tee >(xargs test -z; echo  "${PIPESTATUS[*]}")
xxx
123
  $echo xxx | tee >(xargs test -n; echo  "${PIPESTATUS[*]}")
xxx
0

Is it?

See also Pipe status after command substitution

Look here:

  $ echo xxx | tee >(xargs test -n); echo $?
xxx
0
  $ echo xxx | tee >(xargs test -z); echo $?
xxx
0

and look here:

  $echo xxx | tee >(xargs test -z; echo  "${PIPESTATUS[*]}")
xxx
123
  $echo xxx | tee >(xargs test -n; echo  "${PIPESTATUS[*]}")
xxx
0

That is?

See also Pipe status after command substitution

Look here:

  $ echo xxx | tee >(xargs test -n); echo $?
xxx
0
  $ echo xxx | tee >(xargs test -z); echo $?
xxx
0

and look here:

  $echo xxx | tee >(xargs test -z; echo  "${PIPESTATUS[*]}")
xxx
123
  $echo xxx | tee >(xargs test -n; echo  "${PIPESTATUS[*]}")
xxx
0

That is?

See also Pipe status after command substitution