Sidestepping the Shebang

Sprad has asked for the wisdom of the Perl Monks concerning the following question:

I've got a Perl script that I need to run with a different interpreter. Unfortunately, I can't change the code at all, I can only run it from a wrapper script. So I'm trying a line like this:

/new/perl script.pl

But I get this error:

/old/perl: relocation error: (blahblah)/DBI/DBI.so: undefined symbol: Perl_get_sv

I made a local copy of the script and manually changed the #! to point to /new/perl. This works fine. So why's it still running /old/perl when I make the switch from the command line?

---
A fair fight is a sign of poor planning.

Comment on Sidestepping the Shebang Select or Download Code

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Re: Sidestepping the Shebang by sgifford (Prior) on Nov 02, 2005 at 17:08 UTC
As Perl Mouse mentioned, Perl interprets the shebang line itself for various reasons. To work around that, how about removing that line altogether: `tail +2 script.pl \|/new/perl` [download]	[reply] [d/l]
Re: Sidestepping the Shebang by Perl Mouse (Chaplain) on Nov 02, 2005 at 16:53 UTC
Unlike most interpreters, Perl does pay attention to the she-bang line, and it may fire up the interpreter mentioned on it if it thinks that isn't some form of perl. Could you tell us the exact she-bang line, and tell us the exact command line you give that fails? The OS might be useful as well. `Perl --((8:>*`	[reply]
Re^2: Sidestepping the Shebang by Sprad (Hermit) on Nov 02, 2005 at 17:06 UTC
Sure thing. Shebang line: `#!/usr/bin/perl` Command line: `/tmp/perl -x /home/sprad/test/broken.pl` This is on a Linux box. Red Hat 7.2, if it makes a difference. Bash shell. I've tried it with and without the -x flag, no difference. --- A fair fight is a sign of poor planning.	[reply] [d/l] [select]
Re^3: Sidestepping the Shebang by Perl Mouse (Chaplain) on Nov 02, 2005 at 17:16 UTC
That means perl shouldn't fire up "/usr/bin/perl", so that isn't the problem. I'm afraid I can't further help you - I don't think I can replicate your behaviour (I often run with a different version of perl than mentioned on the she-bang line, and never have problems with it.) `Perl --((8:>*`	[reply]
Re: Sidestepping the Shebang by Delusional (Beadle) on Nov 03, 2005 at 11:07 UTC
~~Perhaps the information found on the mySQL support pages will help you.~~ On second though, perhaps not. Miss read the information...	[reply]