Re: #! incompatible -- binfmt_script.c broken?

Matthew Garrett (mgarrett@chiark.greenend.org.uk)
Wed, 04 Dec 2002 20:37:52 +0000

Matthias Andre wrote:
>On Wed, 04 Dec 2002, Alex Riesen wrote:
>> The interpreter (/bin/sh) has got everything after
>> its name. IOW: "-- # -*- perl -*- -T"
>
>Yes, as SINGLE argument. Therefore, Perl programs break if they use this
>procedure recommended by "man perlrun".
>
>I don't care WHY it works everywhere else, I want this incompatibility
>fixed and I'm not going through a flame war as with the 4.4BSD
>SIOCGIFNETMASK issue again. This is not negotiable.

See http://www.uni-ulm.de/~s_smasch/various/shebang/ . FreeBSD is the
*only* OS to pass multiple arguments. SUS says nothing about it, and
pretty much every single implementation varies. It does not work
everywhere else.

>We have enough braindead frivulous incompatibilities in Linux.

The *only* thing you can reliably use in #! lines is an interpreter
followed by a single argument with no trailing space. On NetBSD with
bash as /bin/sh:

mjg59@cysteine:/tmp$ cat foo.pl
#!/bin/sh -- # -*- perl -*- -p
mjg59@cysteine:/tmp$ ./foo.pl
/bin/sh: -- # -*- perl -*- -p: unrecognized option

File a bug against perlrun(1).

-- 
Matthew Garrett | mjg59-chiark.mail.linux-rutgers.kernel@srcf.ucam.org
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