I am most definitely not a Perl guru, so I might be asking a simple question but...I can't figure it out. I work on a model that uses Perl for some scripting that creates other scripts. I also work on a system where directories can "move" because of NFS. As an example, I have a directory on the system:

/discover/nobackup/mathomp4

That is actually a path through a symlink:

$ pwd -L
/discover/nobackup/mathomp4
$ pwd -P
/gpfsm/dnb44/mathomp4

[download]

Every so often, due to disk systems filling up, they might have to move us from, say, dnb44 to dnb45, and if I use Perl to make a script before that move, well, things break. So, it would be good for Perl to use the logical and not physical path. For example, I have a script that wants to know what directory it was called from. My hope after reading the FindBin docs:

$Bin         - path to bin directory from where script was invoked
$RealBin     - $Bin with all links resolved

[download]

was that Bin would do it, but it seems to be the same as RealBin:

$ cd $HOME
$ cat /discover/nobackup/mathomp4/MyTestScript/bin/test.pl
#!/usr/bin/env perl
use FindBin;
use File::Basename;
my $fvroot = dirname($FindBin::Bin);
print "Using Bin:     $fvroot\n";
my $fvroot2 = dirname($FindBin::RealBin);
print "Using RealBin: $fvroot2\n";
$ /discover/nobackup/mathomp4/MyTestScript/bin/test.pl
Using Bin:     /gpfsm/dnb44/mathomp4/MyTestScript
Using RealBin: /gpfsm/dnb44/mathomp4/MyTestScript

[download]

Dang. So is there any way for Perl to see the logical path rather than the physical one?

In reply to Getting logical path from Perl? by mathomp4

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.