I've used this routine in the past. It seems to work with your data.

use strict;
use warnings;

my @paths = qw{
   /self/xplanatori
   /usr/lib/perl5/../../
   /home/fake4/../fake/
   /resolve/me/../right/
   /./resolve////me/../right/.
   /../.././usr/././.
   /../.././////././.
   /.....
   .///../};

print qq{@{[cleanPath($_)]}\n} for @paths;

#   ---------
sub cleanPath
#   ---------
{
    my $absPath = shift;
    return $absPath if $absPath =~ m{^/$};
    my @elems = split m{/}, $absPath;
    my $ptr = 1;
    while($ptr <= $#elems)
    {
        if($elems[$ptr] eq q{})
        {
            splice @elems, $ptr, 1;
        }
        elsif($elems[$ptr] eq q{.})
        {
            splice @elems, $ptr, 1;
        }
        elsif($elems[$ptr] eq q{..})
        {
            if($ptr < 2)
            {
                splice @elems, $ptr, 1;
            }
            else
            {
                $ptr--;
                splice @elems, $ptr, 2;
            }
        }
        else
        {
            $ptr++;
        }
    }
    return $#elems ? join q{/}, @elems : q{/};
}

[download]

Here's the output.

/self/xplanatori
/usr
/home/fake
/resolve/right
/resolve/right
/usr
/
/.....
/

[download]

I hope this is of interest.

Cheers,

JohnGG

In reply to Re: cleaning up absolute path without resolving symlinks by johngg
in thread cleaning up absolute path without resolving symlinks by leocharre

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