elisp: how to detect if a file has changed on disk

elisp: how to detect if a file has changed on disk

[Mirko]

Hello,

I use emacs on my desktop and laptop, and unison to synchronize
modified files between the machines.

But that means that after synchronization, some of the files that a
buffer is visiting will change, and I will have to revert the buffer.
I would like to automatically revert all such buffers.  What function
can I use to test whether a the file that a buffer is visiting has
changed?

Thanks,

Mirko

Re: elisp: how to detect if a file has changed on disk

[Peter Milliken]

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See section 27.6 of the Elisp Manual (comparison of modification time).

See also 26.3 (Reverting) for reverting mechanisms.

Pete

On Wed, Dec 17, 2008 at 1:03 AM, Mirko <mvukovic@nycap.rr.com> wrote:

> Hello,
>
> I use emacs on my desktop and laptop, and unison to synchronize
> modified files between the machines.
>
> But that means that after synchronization, some of the files that a
> buffer is visiting will change, and I will have to revert the buffer.
> I would like to automatically revert all such buffers.  What function
> can I use to test whether a the file that a buffer is visiting has
> changed?
>
> Thanks,
>
> Mirko
>

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Re: elisp: how to detect if a file has changed on disk

[Mirko]

On Dec 16, 5:51 pm, "Peter Milliken" <peter.milli...@gmail.com> wrote:
> See section 27.6 of the Elisp Manual (comparison of modification time).
>
> See also 26.3 (Reverting) for reverting mechanisms.
>
> Pete
>
> On Wed, Dec 17, 2008 at 1:03 AM, Mirko <mvuko...@nycap.rr.com> wrote:
> > Hello,
>
> > I use emacs on my desktop and laptop, and unison to synchronize
> > modified files between the machines.
>
> > But that means that after synchronization, some of the files that a
> > buffer is visiting will change, and I will have to revert the buffer.
> > I would like to automatically revert all such buffers.  What function
> > can I use to test whether a the file that a buffer is visiting has
> > changed?
>
> > Thanks,
>
> > Mirko
>
>

Thank you:

(defun revert-buffers ()
  "Loop over all buffers with modified files and offer to revert them"
  (interactive)
  (save-excursion
    (dolist (buffer (buffer-list))
      (unless (verify-visited-file-modtime buffer)
	(set-buffer buffer)
	(revert-buffer)))))

Mirko