Re: reading from standard input in batch mode

[Eric Abrahamsen <eric@ericabrahamsen.net>]

Eric Abrahamsen <eric@ericabrahamsen.net> writes:

> I'm trying to figure out how batch mode works, and I want to do
> something very simple: call a subordinate emacs process, passing it a
> string, and have it write the string to a file. It's not working but I
> don't know how to debug this.
>
> In boomerang.el:
>
> (defun boomerang ()
>   (let ((msg (read)))
>     (append-to-file msg
> 		    nil
> 		    "/home/eric/tmp/results.txt")))
>
> In my main emacs:
>
> (shell-command
> "emacs -Q --batch -l boomerang.el -f boomerang \"hi there\"")
>
> The subordinate emacs starts and finishes (returning 255, which just
> came up on a thread in emacs.devel, I think), but no file is written. As
> far as I know, `read' should be reading from standard-input in this
> case. What am I doing wrong?

I figured it out, it should have been (read t). Ignore me!