File::MMagic 
#!/usr/bin/perl --


use strict;
use warnings;

my $file = 'test.png' ; # must exist
my $fileL = 'test.link'; # will be created/removed

checkit( $file );

warn 'Linking ', link( $file, $fileL );

checkit( $fileL );

warn 'UnLinking ', unlink( $fileL );

sub checkit {
    use File::MMagic;
    my  $mm = new File::MMagic; # use internal magic file
    print "Checking $_[0] => ", $mm->checktype_filename( $_[0]),$/;
}

__END__
Checking test.png => image/png
Linking 1 at file.mmagic.check.pl line 12.
Checking test.link => image/png
UnLinking 1 at file.mmagic.check.pl line 16.

[download]

In reply to Re: Determine target file format looking at one link by Anonymous Monk
in thread Determine target file format looking at one link by shmf

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.