I have a multi-gigabyte file. Is there an easy way to change the modification timestamp of a file without opening it, modifing it, and closing it again? I'd like to do it using standard Perl. I'm using v5.8. I'd like to do it without creating a second or temporary file too. I just want to change the modifiation time, not the contents. It would be great if there was a simple function call to do it. Thanks in advance.

Update
Thanks for all the great answers. I should have said I was using ActiveState Perl on Windows. I just wrote a little touch.pl script and stuck it in my utilities folder. It amounts to this: 
use strict;
use warnings;
die "bad file name: $ARGV[0]" if !-e $ARGV[0];
my $atime = (stat($ARGV[0]))[8];
utime $atime, time(), $ARGV[0];

[download]

In reply to Changing file modification timestamp by monktim

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.