[augeas-devel] augeas on AIX

[David Lutterkort]

On Mon, 2009-06-15 at 10:58 +0200, Kristof Willaert wrote:
> On Sun, Jun 14, 2009 at 6:37 AM, David Lutterkort<lutter at redhat.com> wrote:
> > On Sat, 2009-06-13 at 15:22 +0200, Kristof Willaert wrote:
> >> I have been trying to build Augeas on AIX (5.3).
> >
> > Excellent ! I know nothing about AIX, but would love to have Augeas work
> > there.
> 
> >> So far I have been able
> >> to get it to compile and run without segfaulting. Had to work around the
> >> non-existing getopt_long in AIX, and manually link a few gnulib .o files into
> >> libfa, but it is running.
> >
> > Can you send details of what you needed to do ? I'd like to add that in.
> 
> Sure.
> The getopt_long function does not exist in AIX libc, and there is no substitute
> in gnulib. So I kind of mangled the source and used getopt instead (getopt_long
> only adds the --noload and --nostdinc arguments I think, and just to
> get it to compile
> they were not crucial).
> There is definitely a better way to fix this, but due to my lack of C skills ...

The 'getopt' module from gnulib actually contains getopt_long,
unfortunately, it's licensed LGPLv3 - I need to see if I can get the
gnulib maintainers to relicense it.

In the meantime, it would be great if you could post a patch of what you
did (a simple unified diff is good enough)

> The second problem was a "referenced symbol not found" error in libfa.
> Asprintf (and vasprintf) is missing from the AIX libc. Configure notices that:
> 
> checking for vasprintf... no
> 
> and make compiles asprintf.c and vasprintf.c in gnulib/lib.
> But these are not linked into libfa.

This is very strange - and it definitely works on other non-glibc
systems, like FreeBSD. The Makefile does link libfa with gnulib ... do
you have the errors from make ?

> On a related note, I also compiled Augeas on a stock Solaris 10 (yes we have an
> exotic range of machines to administer :), I'll send the fixes I had
> to perform if
> you want. So far tests on Solaris have been successful.

Excellent ! I've been building/testing Augeas on OpenSolaris, but
getting it to work on Solaris proper would be really cool.

> >> What isn't working, is that I don't see anything in the /files subtree
> >> in augtool.
> >> The /augeas subtree is populated with all the lenses, but nothing appears
> >> in /files:
> >>
> >> nim  > augtool
> >> augtool> ls /
> >> augeas/ = (none)
> >> files = (none)
> >> augtool> ls /files
> >> augtool>
> >
> > Does 'print /augeas//error' show anything ? Might be best if you can run
> > 'augtool print >somefile.txt' and send that file as an attachment.
> 
> print /augeas//error gives me nothing.
> 
> nim  > augtool
> augtool> print /augeas//error
> augtool>
> 
> Augtool print output below. I removed all lenses except the
> aliases.aug, util.aug and
> sudoers.aug to simplify things (aliases file and sudoers are
> syntactically the same on all unices I think):

sudoers and aliases are actually syntactically quite different, at least
on Linux.

> nim  > augtool print
> /augeas
> /augeas/root = "/"
> /augeas/version = "0.5.0"
> /augeas/version/save
> /augeas/version/save/mode[1] = "backup"
> /augeas/version/save/mode[2] = "newfile"
> /augeas/version/save/mode[3] = "noop"
> /augeas/version/save/mode[4] = "overwrite"
> /augeas/version/defvar
> /augeas/save = "overwrite"
> /augeas/load
> /augeas/load/Aliases
> /augeas/load/Aliases/lens = "@Aliases"
> /augeas/load/Aliases/incl = "/etc/aliases"
> /augeas/load/Sudoers
> /augeas/load/Sudoers/lens = "@Sudoers"
> /augeas/load/Sudoers/incl = "/etc/sudoers"
> /augeas/load/Sudoers/excl[1] = "*.augnew"
> /augeas/load/Sudoers/excl[2] = "*.augsave"
> /augeas/load/Sudoers/excl[3] = "*.rpmsave"
> /augeas/load/Sudoers/excl[4] = "*.rpmnew"
> /augeas/load/Sudoers/excl[5] = "*~"
> /augeas/files
> /files
> nim >
> 
> So it does not load any config files (while they are available on the system).

Looking at your truss output, it seems to stat /etc/sudoers (after a lot
of ugly chdir's), but never tries to open it - if it tried and failed,
you should get some sort of error message
in /augeas/files/etc/sudoers/error (which 'print /augeas//error' would
show)

Also, I see it stat /tmp, which shouldn't happen unless you mention that
explicitly on the command line or in one of the lenses.

If you feel really adventurous and have a debugger handy, you might want
to break on transform_load and step through it, in particular through
filter_generate and load_file.

David