What is the exact meaning of the find2perl perl shebang + eval?

Question

What exacly do the following?

#! /usr/bin/perl -w
    eval \'exec /usr/bin/perl -S $0 ${1+\"$@\"}\'
        if 0; #$running_under_some_shell

<

Answer 1

I found some discussion here: http://www.perlmonks.org/?node_id=825147

The extended hashbang is there so you can run your Perl script with almost any /bin/sh under the sun, even a shell/kernel that does not honor the hashbang and it will still launch perl in the end.