On Sep 4, 2012 4:50 AM, "Bruce Dubbs" <bruce.dubbs
<bruce.du...@gmail.com>@<bruce.du...@gmail.com>
gmail.com <bruce.du...@gmail.com>> wrote:
>
> Bryan Kadzban wrote:
> > John Burrell wrote:
> >> coreutils no longer installs su.
> >
> > As others said, LFS now uses su from shadow.
>
> We've installed su from shadow for as long as I recall. It's not new.
>
> > However, this doesn't help
> > you, because there is no chapter-5 shadow installation, and adding its
> > dependencies might be problematic.
>
> > What *may* help you is a return to the package-user hint as it existed
> > back before coreutils' version of su accepted UIDs, and also before we
> > installed glibc in chapter 5, when the hint had the same issue (because
> > usernames could not be resolved to UIDs either, without glibc):
> >
> > http://<http://wiki.linuxfromscratch.org/hints/browser/trunk/PREVIOUS_FORMAT/more_control_and_pkg_man.txt?rev=904>
wiki.linuxfromscratch.org<http://wiki.linuxfromscratch.org/hints/browser/trunk/PREVIOUS_FORMAT/more_control_and_pkg_man.txt?rev=904>
/hints/browser/trunk/<http://wiki.linuxfromscratch.org/hints/browser/trunk/PREVIOUS_FORMAT/more_control_and_pkg_man.txt?rev=904>
PREVIOUS_FORMAT<http://wiki.linuxfromscratch.org/hints/browser/trunk/PREVIOUS_FORMAT/more_control_and_pkg_man.txt?rev=904>
/<http://wiki.linuxfromscratch.org/hints/browser/trunk/PREVIOUS_FORMAT/more_control_and_pkg_man.txt?rev=904>
more_control_and_pkg_man.txt<http://wiki.linuxfromscratch.org/hints/browser/trunk/PREVIOUS_FORMAT/more_control_and_pkg_man.txt?rev=904>
?rev=904<http://wiki.linuxfromscratch.org/hints/browser/trunk/PREVIOUS_FORMAT/more_control_and_pkg_man.txt?rev=904>
> >
> > It used to replace su.c from sh-utils (...yes, sh-utils, before it got
> > merged with textutils and one other *-utils package that I don't
> > remember, into coreutils) with a custom .c file, in chapter 5. Then it
> > built su from that, statically-linked, and installed it without the
> > setuid bit. (Because the replacement binary never asked for a password,
> > it was totally unsafe to be setuid-root. It was, however, safe for root
> > to run this binary targeting a different user.)
> >
> > That .c file should not require the rest of the sh-utils infrastructure;
> > you should be able to build a su binary from those sources directly
> > (probably with just "make su" and no Makefile, actually, though I
> > haven't tried it).
>
> I guess I don't understand. When you enter chroot, you are root. Why
> do you need su? The only place it's used int he book is in the
> cureutils tests and the bash tests. Shadow is now built before either
> of these.
>
They need it to switch from root to the package user, An unprivileged user
account with no password so only root can get at it.
> If you really need it for package users, then copy it from the host into
> /tools/bin. You are not going to install it, just use it.
It has been too long since I last played around with it, but looking at my
scripts I
ln -sv su-tools /tools/bin/su
I honestly don't recall where the su-tools came from.
It may have been included in the package users hint's blobs (
more_control_helpers.tar.bz2 )
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