file-writable-p docstring says:
Return t if file FILENAME can be written or created by you.
In Windows you cannot usually write on files when they are used by a different app. In these instances you get a permission denied error since the process blocks the access.
For example, in most of the viewers, if you open
~/foo.pdf, you cannot write access to it.
t. Therefore, with
(if (file-writable-p "~/foo.pdf") (with-temp-file "~/foo.pdf" (insert "Hello World")))
returns the error:
(file-error "Opening output file" "Permission denied" .....
The same happens with:
(if (file-writable-p "~/foo.pdf") (delete-file "~/foo.pdf"))
Is this the way
file-writable-p is intended to work?
If so, which is the proper path to safely write some output to a file?