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Date:      Wed, 16 Feb 2005 09:20:00 +0100
From:      Pawel Jakub Dawidek <pjd@FreeBSD.org>
To:        Garance A Drosehn <gad@FreeBSD.org>
Cc:        cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/bin/sh options.c
Message-ID:  <20050216082000.GH9291@darkness.comp.waw.pl>
In-Reply-To: <200502160517.j1G5HwRL083696@repoman.freebsd.org>
References:  <200502160517.j1G5HwRL083696@repoman.freebsd.org>

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On Wed, Feb 16, 2005 at 05:17:58AM +0000, Garance A Drosehn wrote:
+> gad         2005-02-16 05:17:58 UTC
+>=20
+>   FreeBSD src repository
+>=20
+>   Modified files:
+>     bin/sh               options.c=20
+>   Log:
+>   Change /bin/sh so *it* implements the processing needed for scripts to
+>   work as expected when they have a "shebang line" of:
+>  =20
+>        #!/bin/sh -- # -*- perl -*- -p
+>  =20
+>   This specific line is recommended in some perl documentation, and I th=
ink
+>   I've seen similar lines in documentation for ruby and python.  Those
+>   write-ups expect `sh' to ignore everything after the '--' if the first
+>   thing after the '--' is a '#'.  See chapter 19, "The Command-Line Inte=
rface"
+>   in 3rd edition of "Programming Perl", for some discussion of why perl
+>   recommends using this line in some circumstances.
+>  =20
+>   The above line does work on solaris, irix and aix (as three data point=
s),
+>   and it used to work on FreeBSD by means of a similar patch to execve().
+>   However, that change to execve() effected *all* shells (which caused
+>   other problems), and that processing was recently removed.

Thank you!

--=20
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd@FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!

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