Subject: Re: bug#6995: 24.0.50; get-free-disk-space doesn't return available space in dired

From: Thierry Volpiatto <[email-masked]>
Date: Sat, 18 Sep 2010 15:54:45 +0200

Thierry Volpiatto <[email-masked]> writes:

> With the windows stuff and no call when remote:
>
> (defun get-free-disk-space (dir)
>   (unless (file-remote-p dir)
>     ;; Try to find the number of free blocks.  Non-Posix systems don't
>     ;; always have df, but might have an equivalent system call.
>     (if (fboundp 'file-system-info)
> 	(let ((fsinfo (file-system-info dir)))
> 	  (if fsinfo
> 	      (format "%.0f" (/ (nth 2 fsinfo) 1024))))
>         (when (executable-find directory-free-space-program)
>           (let* ((data   (with-temp-buffer
>                            (call-process directory-free-space-program
>                                          nil t nil
>                                          directory-free-space-args
>                                          dir)
>                            (split-string (buffer-string) "\n" t)))
>                  (values (cdr (split-string (second data)))))
>             (when data (nth 2 values)))))))
>

But may be it's better to have other infos from output of df available:

(defun get-free-disk-space (dir &optional human)
  (unless (file-remote-p dir)
    ;; That is for windows.
    (if (fboundp 'file-system-info)
	(let ((fsinfo (file-system-info dir)))
	  (if fsinfo
	      (format "%.0f" (/ (nth 2 fsinfo) 1024))))
        ;; And this is for Unix/GNULinux.
        (when (executable-find directory-free-space-program)
          (getf (tv-get-disk-info dir human) :available)))))

(defun tv-get-disk-info (dir &optional human)
  (let* (args    (if human
                     (concat directory-free-space-args "h")
                     directory-free-space-args)
         (data   (with-temp-buffer
                   (call-process directory-free-space-program
                                 nil t nil args dir)
                   (split-string (buffer-string) "\n" t)))
         (values (split-string (second data))))
    (loop for i in '(:device :blocks :used :available :capacity :mount-point)
       for j in values
       append (list i j))))

-- 
A+ Thierry
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