RE: Interest in Emacs patched to handle Windows paths?

[Kaz Kylheku <920-082-4242 at kylheku dot com>]

On 2019-07-26 13:08, Soegtrop, Michael wrote:
> Dear Kaz,
>
> > You might be interested in the Cygnal project:
> > http://www.kylheku.com/cygnal/
>
> from your description I would think this doesn't work for Emacs. Emacs
> has its own functions for path management, e.g. to decide what an
> absolute path is.

Yes, like this:   :)

  C:\Users\kaz>txr
  This is the TXR Lisp interactive listener of TXR 221.
  Quit with :quit or Ctrl-D on empty line. Ctrl-X ? for cheatsheet.
  1> (abs-path-p "C:\\foo")
  t
  2> (abs-path-p "C:foo")
  nil
  3> (abs-path-p "/foo")
  t

Cygnal is not a magic fix for programs that manipulate path; it provides 
a POSIX-like system interface, but which takes Windows paths. If the 
program manipulates paths, that has to be ported/extended to support 
Windows paths.

What it provides is that the open() system call and others understand 
drive letter names and such.

chdir() understands the concept of a per-drive current working 
directory, and the "currently logged drive". Check this out:

  4> (chdir "f:") ;; basically a bare interface to the chdir syscall
  t
  5> (pwd) ;; wrapper for getcwd
  "F:/"
  6> (chdir "c:")
  t
  7> (pwd)
  "C:/Users/kaz"
  8>

If you want a program ported to Windows via Cygwin to understand native 
conventions, Cygnal goes a long way.


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