canonicalize-path: Filesystem Path Canonicalization

1:0

canonicalize-path: Filesystem Path Canonicalization🔗ℹ

Neil Van Dyke

License: LGPLv3 Web: http://www.neilvandyke.org/racket/canonicalize-path/

1 Introduction🔗ℹ

This package provides the canonicalize-path procedure, which takes a filesystem path and determines a “canonical” equivalent. The canonical path is cleansed, simplified, case-normalized, and complete, and all symbolic links have been followed.

For example, say that you have a Unix filesystem directory structure like (where “->” denotes a symbolic link):

/tmp/

|-- a/

| |-- b1/

| | `-- s -> ../b2/c/f

| `-- b2/

| `-- c/

| `-- f

`-- x/

`-- y -> ../a

If your current directory is then "/tmp/x", you get the following behavior:

> (canonicalize-path "y/b1/s")

#<path:/tmp/a/b2/c/f>

This is mostly intended for Unix-like filesystems, like on GNU/Linux.

This code was originally written for the RackOut appliance.

2 Interface🔗ℹ

procedure
(canonicalize-path path) → path?
path : path-string?

Returns a “canonicalized” path to the same file or directory that path would reach. If a cycle is detected while following symbolic links, an exception is raised.

3 Known Issues🔗ℹ

Needs more testing, especially on non-Unix-like systems.

4 History🔗ℹ

Version 1:0 — 2016-02-26
- Initial version, using code from author’s 2012 path-misc package.

5 Legal🔗ℹ

Copyright 2012, 2016 Neil Van Dyke. This program is Free Software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See http://www.gnu.org/licenses/ for details. For other licenses and consulting, please contact the author.