Use access-file in EWW to check before downloading a file

* lisp/net/eww.el (eww-download): Check accessibility of
eww-download-directory to prevent starting a download that will fail
to write.
* src/fileio.c (Faccess_file): Clarify the use of string argument in
the docstring.

2 files changed, 2 insertions, 1 deletions

diff --git a/lisp/net/eww.el b/lisp/net/eww.el
index 0282fe68e6a..f7e06341443 100644
--- a/lisp/net/eww.el
+++ b/lisp/net/eww.el
@@ -1501,6 +1501,7 @@ Differences in #targets are ignored."
 (defun eww-download ()
   "Download URL under point to `eww-download-directory'."
   (interactive)
+  (access-file eww-download-directory "Download failed")
   (let ((url (get-text-property (point) 'shr-url)))
     (if (not url)
         (message "No URL under point")
diff --git a/src/fileio.c b/src/fileio.c
index 81eaa771189..a46cfc7ac69 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -2682,7 +2682,7 @@ DEFUN ("file-writable-p", Ffile_writable_p, Sfile_writable_p, 1, 1, 0,
 
 DEFUN ("access-file", Faccess_file, Saccess_file, 2, 2, 0,
        doc: /* Access file FILENAME, and get an error if that does not work.
-The second argument STRING is used in the error message.
+The second argument STRING is prepended to the error message.
 If there is no error, returns nil.  */)
   (Lisp_Object filename, Lisp_Object string)
 {