How to move the cursor to the end of the read only text?

Question

Say I have text:

This read only text ends here>*********************|

The This read only text ends here> is read only while the asterisks are are not. When the (move-to-read-only-end) is called, I want the cursor to move right after the >. Like this:

This read only text ends here>|*********************

How can the (move-to-read-only-end) be written?

EDIT: Adding comment here per advice,

"In eshell, the prompt is read only but when you write commands those are not. So, I want to be able to move at the end of the prompt and the start of the commands."

Answer 1

Since you're asking about eshell specifically, you should be able to use the command eshell-bol, which is bound to C-a by default. It moves the cursor to the end of the prompt on the current line.

Answer 2

Maybe something like this:

(defun move-to-read-only-end ()
  "..."
  (interactive)
  (goto-char (or (next-single-property-change (point) 'read-only)
                 (line-end-position))))

Here, function next-single-property-change gives you the first position where property read-only changes its value. Or it gives you nil, in which case you go to the end of the line.