Changing shebangs should be no problem for an abbot.

#! /usr/bin/perl
use strict;
use warnings;
use File::Find;

File::Find->find(&main::wanted, '/');

sub wanted {
  if (-T $File::Find::name) {
    open ("FILE", "< $File::Find::name")
      or die ("$!: Could not open " . $File::Find::name);
    my $first_line = <FILE>";
    unless ($first_line =~ m(^\#\!\s{0,1}/usr/bin/perl\n$) {
      return 0;
    }
    $first_line =~ s[perl][perl5]i;
    while (<FILE>) {
      $first_line .= $_;
    }
    close ("FILE")
      or die ("Could not close file "
              . $File::Find::name
              . " because $!");
    # create a temp file so if we get interrupted
    # we won't lose our data
    `cp $File::Find::name $File::Find::name~`;
    open ("FILE", "> $File::Find::name")
      or die("Can't open $File::Find::name for "
             . "writing because $!");
    print FILE $first_line;
    close ("FILE")
      or die ("Cannot close $File::Find::name "
              . "because $!");
    # get rid of the temp file
    unlink ("$File::Find::name~");
  }
}
[download]

---

---

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! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

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:
	&		&
	<		&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.