In Windows, @ARGV will contain the arguments encoded using the Active Code Page.

Elsewhere, @ARGV will be an exact copy of the string passed to exec or whatever.

open and Perl's other file operators suffer from The Unicode Bug. They will use the internal representation of the string provided. So in effect, it transforms the string as follows: 

sub transform {
   my $s = shift;
   # Encode using utf8 string using the
   # upgraded/wide/UTF8=1 string storage format.
   utf8::encode( $s ) if utf8::is_utf8( $s );
   return $s;
}

[download]

On Windows, the string is expected to be the file name encoded using the Active Code Page.

In reply to Re: how are ARGV and filename strings represented? by ikegami
in thread how are ARGV and filename strings represented? by almr

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.