Hello, I have made a perl script which takes the files from a directory listed on the command line and places them into an array of hashes with key/value pairs path:full path to file, size:size of file in bytes, and id:sha256sum of file. It works fine when I use its own directory, but it returns "undef" on the id value when used in other directories, and the $! error is "no such directory or file found", which I find quite odd considering that it lists the filenames sha256sums just fine. 
use strict;
use warnings;
use Data::Dumper qw(Dumper);
use File::Spec;
use Digest::SHA qw(sha256_hex);

print join("\n", @ARGV),"\n\n";
#print Dumper \@ARGV;

my $dir = $ARGV[0];
my $url = $ARGV[1];

my @array;
opendir DIR, $dir or die "cannot open dir $dir: $!";
while(my $file = readdir DIR) {
    next unless(-f "${\File::Spec->catfile($dir, $file)}");
    next if("$file" =~ m/^\./);
    print "${\File::Spec->rel2abs($file)}\n";

    my %hash = (
        path    =>  File::Spec->rel2abs($file),
        size    =>  -s $file,
        id      =>  sha256_hex($file),
    );

    push(@array, \%hash);
}
closedir DIR;

print Dumper sort \@array;

[download]

In reply to -s file test operator only works in same directory by Bowlslaw

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.