[Help-bash] A do nothing function

[Peng Yu]

Hi,

I have to use cat if just want to pass the stdin to stdout. But this
requires calling cat. Is there a more efficient way to just past stdin
to stdout?

/tmp$ cat test.sh
#!/usr/bin/env bash

function cmd {
cat
}

echo xxxx | cmd | cat

-- 
Regards,
Peng