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Re: Execing perl?


From: Chet Ramey
Subject: Re: Execing perl?
Date: Wed, 11 Jul 2001 15:02:35 -0400

> OK, this isn't a bug, and it's also something that you'd _think_ would
> be so obvious it'd be right at the top of all the FAQs, etc... but I
> can't find it, nor can I figure it out.
> 
> The Perl docs (perlrun) say you can use this stanza to write a perl
> script when you don't know where the perl runtime will be; something
> like:
> 
>   #!/bin/sh -- # -*- perl -*-
>   eval 'exec perl -wS $0 ${1+"$@"}'
>     if $running_under_some_shell;
> 
> This doesn't work if bash is /bin/sh; I get this error:
> 
>   /bin/sh: -- # -*-perl-*-: unrecognized option

This really doesn't have anything to do with the shell, per se.  The
kernel is passing the rest of the line to /bin/sh as argv[1], and
bash is attempting to open it as a shell script.

Chet

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
( ``Discere est Dolere'' -- chet)

Chet Ramey, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/



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