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Date:      Mon, 02 Jun 2008 17:07:25 -0400
From:      Joe Marcus Clarke <marcus@marcuscom.com>
To:        Coleman Kane <cokane@freebsd.org>
Cc:        cvs-src@freebsd.org, Stefan Farfeleder <stefanf@freebsd.org>, src-committers@freebsd.org, cvs-all@freebsd.org, John Baldwin <jhb@freebsd.org>
Subject:   Re: cvs commit: src/bin/sh expand.c parser.c parser.h
Message-ID:  <1212440845.18384.49.camel@shumai.marcuscom.com>
In-Reply-To: <1212439968.3115.53.camel@localhost>
References:  <200805151955.m4FJtRMb099378@repoman.freebsd.org> <200806021445.15974.jhb@freebsd.org> <1212439968.3115.53.camel@localhost>

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On Mon, 2008-06-02 at 16:52 -0400, Coleman Kane wrote:
> On Mon, 2008-06-02 at 14:45 -0400, John Baldwin wrote:
> > On Thursday 15 May 2008 03:55:27 pm Stefan Farfeleder wrote:
> > > stefanf     2008-05-15 19:55:27 UTC
> > >=20
> > >   FreeBSD src repository
> > >=20
> > >   Modified files:
> > >     bin/sh               expand.c parser.c parser.h=20
> > >   Log:
> > >   Expand $LINENO to the current line number.  This is required by=20
> > SUSv3's "User
> > >   Portability Utilities" option.
> > >  =20
> > >   Often configure scripts generated by the autotools test if $LINENO =
works=20
> > and
> > >   refuse to use /bin/sh if not.
> > >  =20
> > >   Package test run by:    pav
> >=20
> > This breaks the build of editors/openoffice-2
> >=20
> > Specifically, the libxslt configure script has two statements like this=
:
> >=20
> > if test "1" =3D=3D "1"
> > then
> > 	blah blah
> > endif
> >=20
> > Specifically note the "=3D=3D" passed to test(1).  POSIX says this shou=
ld be "=3D",=20
> > and that's all our test(1) implements.  The bash manpage for the builti=
n-test=20
> > command says:
> >=20
> >        string1 =3D=3D string2
> >               True if the strings are equal.  =3D may be used in place =
of =3D=3D for
> >               strict POSIX compliance.
> >=20
> > IOW, it encourages "=3D=3D".  I'm not sure if we want to force the use =
of bash for=20
> > certain ports or if we want to just implement bash'isms in our tools as=
 we=20
> > encounter them (or patch the port?).  In this case the patch is not=20
> > complicated (just replace the two '=3D=3D' with '=3D' in libxslt's conf=
igure=20
> > script).
> >=20
>=20
> This is annoying... I had to clean this behavior up once recently in
> someone else's script. POSIX "test" syntax has been "=3D" and not "=3D=3D=
" for
> a long time. Bash is not C... so I don't understand why the attempt to
> document "=3D=3D" as the "proper" operator. My thinking is the offending
> script should be fixed with a patch that gets forwarded upstream to the
> libxslt team (including a mention that /bin/sh and /bin/test are not
> documented to support "=3D=3D" by POSIX).

This is one of the most pervasive bashisms around.  We (gnome@)
typically fix the script to use "=3D" then forward the information
upstream.  Solaris is also bit by this, so it's usually not a big deal
to get upstream vendors to fix their scripts.

Joe

>=20
--=20
PGP Key : http://www.marcuscom.com/pgp.asc

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