Re: [PATCH 1/5] Add is_absolute_path(), make_absolute_path() and normalize_path()

From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Jul 26, 2007, 13:58 UTC
Message-ID: <Pine.LNX.4.64.0707261456040.14781@racer.site>
In-Reply-To: <7v1wevac63.fsf@assigned-by-dhcp.cox.net>

Hi,

On Wed, 25 Jul 2007, Junio C Hamano wrote:

Show 15 quoted lines

> Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:
> 
> > +/* strip out .. and . */
> > +char *normalize_path(char *path)
> > +{
> 
> This always makes one worry what should happen when foo/../bar
> is _not_ bar in reality (i.e. foo is symlink to a directory
> elsewhere).
> 
> It depends on what kind of "path" you feed to the function (and
> its caller, make_absolute_path()).  If you always feed a path
> >from the index (or a path obtained by recursively reading a
> tree), it is Ok.  If it is arbitrary path obtained from the user
> or the filesystem, it is not.

Agree.  Maybe a comment above the function, like

	/*
	 * The function normalize_path() converts ".." and "." names in 
	 * the given path so that "foo/../bar/./" will come out as "bar".
	 *
	 * Note: normalize_path() does not follow symlinks, so if "foo" is
	 * a symlink in the example above, the result will not work as 
	 * expected.
	 */

Hmm?

Ciao, Dscho