Re: Normalizing pathnames

[P]

Dmitry V. Levin wrote:
> Hi,
>
> On Thu, Oct 07, 2004 at 12:03:48PM +0100, address@hidden wrote:
>
> > Suresh Krishnan wrote:
> >
> > > Thanks for the quick response. readlink -f does almost everything I 
> > > want. The only thing it does not do is to verify whether the path is 
> > > valid. I can add this on very easily in my script.
> >
> > That got me thinking. If the path doesn't exist then
> > I think readlink -f should just return the canonicalized
> > path (the output from realpath). That would be more useful
> > that just stopping at the first invalid path component?
> >
> > I.E. I think the output from the following should be
> > /usr/1/2/3 rather than /user/1
> >
> > readlink -f /usr/share/../1/2/3
>
>
> You are talking about some non-coreutils readlink utility.

I was talking about an older coreutils actually.
The extra canonicalize options were added on Jul 6 2004
http://savannah.gnu.org/cgi-bin/viewcvs/coreutils/coreutils/src/readlink.c

> The readlink from coreutils works this way:
>
> $ readlink --version |fgrep readlink
> readlink (GNU coreutils) 5.3.0

Has this version been released?

> $ readlink -f /usr/share/../1/2/3
> $ readlink -v -f /usr/share/../1/2/3
> readlink: /usr/share/../1/2/3: No such file or directory
> $ readlink -v -e /usr/share/../1/2/3
> readlink: /usr/share/../1/2/3: No such file or directory
> $ readlink -v -m /usr/share/../1/2/3
> /usr/1/2/3

Perfect, thanks!

Suresh, you can use just readlink to verify path validity now.

Pádraig.