> warn: Pipes and re-direction will work but interactive
> input/output is prohibited.

Hi,

This just means you didn't provide xstreamtodev with the --input-file
option (as hinted by is). Its only fallback would be to read the thing
to write from its stdin, which it doesn't do when it detects stdin is
wired to a terminal. (see isatty(3))

Isn't the message pretty clear? ;-)

HTH,
Aymeric