1:27 p.m.
On Wed, Aug 10, 2011 at 10:46 AM, Richard W.M. Jones <rjones(a)redhat.com>wrote:
On Wed, Aug 10, 2011 at 09:42:10AM -0700, David Konerding wrote:
> BTW, it's actually a list of ~8000 files (looks like all the unpacked
files
> from all the .debs that got downloadeD).
>
> I stopped feboostrap during its download after it downloaded the .deb for
> bash (there seems to be no option to force febootstrap to not clean up
> /tmp/febootstrap* after running).
>
> I see no reason why feboostrap wouldn't be able to read these files:
> 2318338 4 drwxr-xr-x 2 dek redacted 4096 Aug 10 09:39
> /tmp/bashpkg/bin
> 2318444 0 lrwxrwxrwx 1 dek redacted 4 Aug 10 09:39
> /tmp/bashpkg/bin/sh -> bash
> 2318443 0 lrwxrwxrwx 1 dek redacted 4 Aug 10 09:39
> /tmp/bashpkg/bin/rbash -> bash
> 2318339 920 -rwxr-xr-x 1 dek redacted 934336 Apr 18 2010
> /tmp/bashpkg/bin/bash
I would agree this certainly looks like a bug in febootstrap. I can't
imagine what it would be that wouldn't also affect our builds on
Ubuntu 11.04.
Here is a way you could try reproducing the issue, in a smaller and
more manageable context.
You can run all of the commands below as non-root from /tmp or another
temporary directory.
First:
$ febootstrap --verbose --names bash
then examine the debug messages and the output files created in the
current directory ('base.img' and 'hostfiles').
This fetches bash, dash, and a number of other packages. It reports:
1719 files and directories
febootstrap: warning: some host files are unreadable by non-root
febootstrap: warning: get your distro to fix these files:
/bin/bash
/bin/cat
/bin/chgrp
/bin/chmod
...
There are 1361 files in the list.
If base.img and hostfiles look reasonable, try building an appliance
from them:
Looking at hostfiles, there is no /bin/bash, but there is /bin/sh and
/bin/rbash (BTW, Ubuntu uses dash as the main /bin/sh, not bash, but I
assume that's not relevant). sh is a symlink to bash, as is rbash.
I extracted base.img, and it doesn't include any files in /bin. It looks
like all the files in that archive are text/config files or symlinks.
$ febootstrap-supermin-helper -f ext2 -v \
base.img hostfiles $(uname -m) kernel initrd appliance
(Note that 'kernel', 'initrd' and 'appliance' are all output
files
that will be created in the current directory).
Now you've got a chicken-and-egg problem, but 'appliance' is an ext2
disk image which can be examined using guestfish:
$ guestfish --ro -a appliance -m /dev/sda
Right. I just mounted it as a loopback image instead... /bin contains only
this:
$ ls -l /mnt/appliance/bin
total 8
lrwxrwxrwx 1 root root 4 Sep 22 2010 rbash -> bash
lrwxrwxrwx 1 root root 9 Sep 22 2010 sh -> /bin/bash
Running strace on febootstrap, I see that it stats the /bin/bash in the
unpacked bash deb pkg at least once successfully:
7928
lstat("/tmp/febootstrape193191fefe36c245623bc48e5b150a2.tmp/bash_4.1-2ubuntu3_amd64.deb.d//bin/bash",
{st_mode=S_IFREG|0750, st_size=934336, ...}) = 0
7928 write(2, "febootstrap: warning: some host files are unreadable by
non-root\nfebootstrap: warning: get your distro to fix these
files:\n\t/bin/bash\n", 134) = 134
Welcome to guestfish, the libguestfs filesystem interactive shell
for
editing virtual machine filesystems.
Type: 'help' for help on commands
'man' to read the manual
'quit' to quit the shell
><fs> ll /bin/
total 2668
drwxr-xr-x 2 1000 1000 4096 Aug 10 17:40 .
drwxr-xr-x 17 1000 1000 4096 Aug 10 17:41 ..
-rwxr-xr-x 1 0 0 954896 Mar 31 21:20 bash
-rwxr-xr-x 1 0 0 47696 Feb 23 14:24 cat
-rwxr-xr-x 1 0 0 55864 Feb 23 14:24 chgrp
-rwxr-xr-x 1 0 0 51704 Feb 23 14:24 chmod
-rwxr-xr-x 1 0 0 55880 Feb 23 14:24 chown
-rwxr-xr-x 1 0 0 117808 Feb 23 14:24 cp
-rwxr-xr-x 1 0 0 109736 Nov 15 2010 dash
-rwxr-xr-x 1 0 0 55832 Feb 23 14:24 date
-rwxr-xr-x 1 0 0 51840 Feb 23 14:24 dd
-rwxr-xr-x 1 0 0 64208 Feb 23 14:24 df
-rwxr-xr-x 1 0 0 105776 Feb 23 14:24 dir
-rwxr-xr-x 1 0 0 26968 Feb 23 14:24 echo
-rwxr-xr-x 1 0 0 22856 Feb 23 14:24 false
-rwxr-xr-x 1 0 0 47680 Feb 23 14:24 ln
-rwxr-xr-x 1 0 0 105776 Feb 23 14:24 ls
-rwxr-xr-x 1 0 0 47624 Feb 23 14:24 mkdir
-rwxr-xr-x 1 0 0 31112 Feb 23 14:24 mknod
-rwxr-xr-x 1 0 0 35352 Feb 23 14:24 mktemp
-rwxr-xr-x 1 0 0 109584 Feb 23 14:24 mv
-rwxr-xr-x 1 0 0 31200 Feb 23 14:24 pwd
lrwxrwxrwx 1 0 0 4 Jul 20 21:19 rbash -> bash
-rwxr-xr-x 1 0 0 35272 Feb 23 14:24 readlink
-rwxr-xr-x 1 0 0 55872 Feb 23 14:24 rm
-rwxr-xr-x 1 0 0 39320 Feb 23 14:24 rmdir
-rwxr-xr-x 1 0 0 15048 Jan 20 2011 run-parts
lrwxrwxrwx 1 0 0 4 Jul 20 21:19 sh -> dash
-rwxr-xr-x 1 0 0 26984 Feb 23 14:24 sleep
-rwxr-xr-x 1 0 0 63992 Feb 23 14:24 stty
-rwxr-xr-x 1 0 0 22872 Feb 23 14:24 sync
-rwxr-xr-x 1 0 0 10312 Jan 20 2011 tempfile
-rwxr-xr-x 1 0 0 47640 Feb 23 14:24 touch
-rwxr-xr-x 1 0 0 22856 Feb 23 14:24 true
-rwxr-xr-x 1 0 0 27016 Feb 23 14:24 uname
-rwxr-xr-x 1 0 0 105776 Feb 23 14:24 vdir
-rwxr-xr-x 1 0 0 946 Jan 20 2011 which
(The above output was from Ubuntu 11.04)
Rich.
--
Richard Jones, Virtualization Group, Red Hat
http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines. Supports shell scripting,
bindings from many languages. http://libguestfs.org