piping through emacs from shell

[Shaddin Doghmi]

I have an executable that makes some formatted parenthesized output to 
stdout. The output from that executable is unindented and ugly, but 
looks nice when indented in emacs latex mode. I have an indent-all 
function defined in my .emacs that indents an entire buffer. Now, what i 
want is for the executable to pipe its output through emacs somehow, and 
get it back all indented nicely, without me actually interactively 
opening up an emacs window and executing the indent-all function. is 
there anyway i can "use" emacs uninteractively in a pipe like this?