New line and indent without electric mode

Question

I have come to hate the inconsistency of the electric indent mode and I haven't much of a clue about how it works anyways, so I've disabled it and am trying to get the desired behavior from scratch. I want emacs to indent me to the previous line's indentation level and do nothing else on RET. indent-relative seems to be the right function for the job. Seems easy enough, and yet I cannot get it to work. This is what I have thus far:

(electric-indent-mode -1)

(defun my-newline-and-indent ()
  (interactive)
  (newline)
  (indent-relative))

I used to bind this with global-set-key, but hooking it to the specific modes I use is a better idea (found here):

(defun my-keys ()
  (local-set-key [(return)] 'my-newline-and-indent))

(add-hook 'c-mode-hook 'my-keys)

The above does not indent new lines in C. I also tried the same thing with indent-relative-maybe, but that doesn't work either. What am I doing wrong?

---

Edit: now that I got it working thanks to @Tyler, the function that better fits the behavior I want is actually indent-relative-maybe (though I can't find any documentation on it online). indent-relative indents to the last whitespace on the previous line, which is too zealous. For example, here is how it indents in F90 mode:

program test
        _

By contrast, indent-relative-maybe seems to only indent to the first non-whitespace character.

Answer 1

In a terminal the value of [(return)] doesn't apply. You need to use (kbd "RET") instead. (or probably other variations would do, but not [(return)]).