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Perl: the Markov chain saw

Re^2: #! -- why doth thou exist?

by TilRMan (Friar)
on Aug 26, 2005 at 03:07 UTC ( #486786=note: print w/replies, xml ) Need Help??

in reply to Re: #! -- why doth thou exist?
in thread #! -- why doth thou exist?

You could even compile a Perl that reads the #! and replaces itself with the interpreter specified there!

Indeed, perl does this out of the box.

$ cat #!/bin/sh echo 'Hello, World!' $ perl Hello, World!

perlrun has the details, though I prefer Dominus' take in perliaq.

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Re^3: #! -- why doth thou exist?
by itub (Priest) on Aug 26, 2005 at 03:30 UTC
    But, as perlrun says, that trick doesn't work when the interpreter has "perl" in the name, even if it's a different version. That is,
    $ cat #!/usr/bin/perl print "$]\n"; $ ~/bin/perl

    will run ~/bin/perl, and not /usr/bin/perl. I think this is good more often than not.

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