On Mon, Apr 22, 2019 at 3:22 AM Pierre Labastie via lfs-dev <lfs-dev@lists.linuxfromscratch.org> wrote: > > On 22/04/2019 05:55, Jeremy Huntwork via lfs-dev wrote: > > On Sun, Apr 21, 2019 at 8:37 PM Bruce Dubbs <bruce.du...@gmail.com> wrote: > >> > >>> I wasn't asking because of any personal preference. I just noticed > >>> that out of the box Ubuntu fails this test because /bin/sh is a > >>> symlink to /bin/dash, and I was wondering if this is truly a hard > >>> requirement. > >> > >> Yes and yes. > > > > Sorry, I don't understand how it's a hard requirement. Especially > > since you also said later "it's just an advisory". I'm not intending > > to argue, I'd just like to understand. > > > > Anyway, here's a version of that script which will actually exit with > > an error status if any requirements aren't met: > > https://gist.github.com/jhuntwork/e57571e3cbe78d970c6edeee5e42d36b I > > tried to make it easy to read and amend. Feel free to use it if you > > like, or ignore it if you don't. > > > > I think the problem is (1): > - debian symlinks /bin/sh->dash out of the box (looks like ubuntu does the > same) > - dash in debian is (1) an old version, and the maintainer of dash for debian > does (or did) not want to update to a more recent version. That outdated > version is not fully POSIX compatible > - packages using /bin/sh expect it to be fully POSIX compatible, and sometimes > break when using the old debian /bin/dash.
Ah, that makes sense, thank you. So it's not that one of the packages is expecting bash functionality when using scripts with '/bin/sh' (bash is supposed to limit itself to POSIX anyway when called like that) but there was (once upon a time?) a broken '/bin/sh' that shipped with a popular distro. > Now, I've inadvertently built LFS several times with /bin/sh->dash (it's not > tested in jhalfs...), and the build was successful... Good to know, thanks! That is what I suspected as well. JH -- http://lists.linuxfromscratch.org/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
