Wanlong Gao [Mon, 9 Jan 2012 07:22:42 +0000 (15:22 +0800)]
launch: add a goto label when add_drive error
Code cleanup.
Add a goto label to simplify the code.
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Richard W.M. Jones [Sun, 8 Jan 2012 19:12:46 +0000 (19:12 +0000)]
Version 1.15.15.
Richard W.M. Jones [Fri, 6 Jan 2012 21:08:25 +0000 (21:08 +0000)]
debian: Add build-dep erlang-dev.
Richard W.M. Jones [Fri, 6 Jan 2012 18:44:41 +0000 (18:44 +0000)]
Update to latest gnulib.
Matthew Booth [Wed, 4 Jan 2012 11:15:24 +0000 (11:15 +0000)]
Tempora mutantur, nos et mutamur in illis.
Matthew Booth [Wed, 4 Jan 2012 09:56:16 +0000 (09:56 +0000)]
build: Fix automake warnings
Richard W.M. Jones [Wed, 4 Jan 2012 10:16:29 +0000 (10:16 +0000)]
Sort .gitignore (using sort -d -- dictionary order).
Wanlong Gao [Fri, 30 Dec 2011 08:10:50 +0000 (16:10 +0800)]
gitignore: ignore the git related files
*.eml for email picked patches
other for orginal git patch related files.
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Wanlong Gao [Wed, 28 Dec 2011 09:59:38 +0000 (17:59 +0800)]
fish: fix the Ctrl-\ causes guestfish to abort bug(RHBZ#596761)
Handle SIGQUIT by guestfish, so that it can't be terminated.
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Wanlong Gao [Tue, 3 Jan 2012 15:41:43 +0000 (23:41 +0800)]
AUTHORS: add the email address for each authors
Add the email address for authors.
It would be better.
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Richard W.M. Jones [Fri, 23 Dec 2011 22:30:29 +0000 (22:30 +0000)]
fish: mount can be used instead of mount-options with libguestfs >= 1.14
Richard W.M. Jones [Fri, 23 Dec 2011 22:30:09 +0000 (22:30 +0000)]
fish: Fix --format parameter in man page.
Richard W.M. Jones [Fri, 23 Dec 2011 13:26:31 +0000 (13:26 +0000)]
Version 1.15.14.
Richard W.M. Jones [Fri, 23 Dec 2011 10:37:04 +0000 (10:37 +0000)]
lib: Try harder to remove temporary directory along error paths (RHBZ#769680).
Richard W.M. Jones [Fri, 23 Dec 2011 10:33:25 +0000 (10:33 +0000)]
lib: Add guestfs___remove_tmpdir helper function.
This function does 'rm -rf <dir>' for temporary directories, safely
working if '<dir>' contains shell meta-characters.
Replace existing code for removing directories with this.
Wanlong Gao [Fri, 23 Dec 2011 06:54:04 +0000 (14:54 +0800)]
gitignore: ignore the guestfs.* directory
Let git ignore the guestfs.* directorys.
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Wanlong Gao [Fri, 23 Dec 2011 03:46:21 +0000 (11:46 +0800)]
extra-tests: add test-guests to prevent test error
extra-tests is depending on tests-guests.
We need guests/*.img when doing extra-tests.
/work/git/libguestfs/run valgrind --log-file=/work/git/libguestfs/tests/extra/valgrind.log --leak-check=full --error-exitcode=119 --suppressions=/work/git/libguestfs/tests/extra/suppressions ../../cat/virt-cat -a ../guests/fedora.img /etc/fstab >/dev/null
../guests/fedora.img: No such file or directory
make[1]: *** [test-tools-internal] Error 1
make[1]: Leaving directory `/work/git/libguestfs/tests/extra'
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Richard W.M. Jones [Fri, 23 Dec 2011 08:28:26 +0000 (08:28 +0000)]
fish: Fix test-guestfish-events.sh so it works when LIBGUESTFS_DEBUG=1 is set.
Various messages were added and changed when this variable was set
while tests were running.
Wanlong Gao [Wed, 14 Dec 2011 09:40:56 +0000 (17:40 +0800)]
mkfs: optimization and code cleanup
v1->v2: fix a typo pointed by Matt
Optimizations by reducing the STREQ operations and do some
code cleanup.
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
RWMJ: Whitespace changes.
Richard W.M. Jones [Thu, 22 Dec 2011 22:17:17 +0000 (22:17 +0000)]
tests/lvm: Contains a Perl test so we must set PERL5LIB.
This fixes commit
498758faee6be7e989869bf7feba5e1026a1bb65.
Richard W.M. Jones [Thu, 22 Dec 2011 19:12:14 +0000 (19:12 +0000)]
tests/protocol: Contains a Perl test so we must set PERL5LIB.
This fixes commit
498758faee6be7e989869bf7feba5e1026a1bb65.
Richard W.M. Jones [Thu, 22 Dec 2011 18:34:22 +0000 (18:34 +0000)]
Version 1.15.13.
Richard W.M. Jones [Thu, 22 Dec 2011 17:56:47 +0000 (17:56 +0000)]
Security: Mitigate possible privilege escalation via SG_IO ioctl (CVE-2011-4127, RHBZ#757071)
CVE-2011-4127 is a serious qemu & kernel privilege escalation bug
found by Paolo Bonzini.
http://seclists.org/oss-sec/2011/q4/536
An untrusted guest kernel is able to issue special SG_IO ioctls on
virtio devices which qemu passes through to the host kernel without
filtering or sanitizing. These ioctls allow raw sectors from the
underlying host device to be read and written. Significantly, neither
qemu nor the host kernel checks that the range of sectors is within
the partition / LV assigned to the guest. For example, if the guest
is assigned host partition /dev/sda3, it would be able to read or
write any part of /dev/sda including other partitions and the boot
sector. Exploits through LVs passed to the guest are also possible,
with some limitations. File-backed virtual block devices are not
vulnerable. Non-virtio block devices are not vulnerable.
This patch mitigates the problem by disabling the SG_IO ioctl
passthrough in qemu. Thus if libguestfs is examining an untrusted
guest and the libguestfs appliance/daemon is compromised (eg. by
executing guest commands, or through some other compromise), then the
compromised appliance will not be able to issue the above SG_IO ioctls
and exploit the host.
Note that this is just mitigation for libguestfs. Users will still
want to fully update their host kernel, qemu/KVM and libvirt, in order
to prevent other (non-libguestfs) routes to compromise.
The following versions of libguestfs (will/have) this patch applied.
libguestfs >= 1.15.13
libguestfs >= 1.14.8
libguestfs >= 1.12.11
libguestfs >= 1.10.12
libguestfs >= 1.8.16
Earlier versions may be vulnerable unless a downstream packager has
applied this patch.
Cc: Hilko Bengen <bengen@hilluzination.de>
Hilko Bengen [Sat, 10 Dec 2011 21:16:55 +0000 (22:16 +0100)]
Fixed checks for libpython features
The python3.1 package shipped with Debian/squeeze does not have the
'mu' suffix that was assumed before.
Richard W.M. Jones [Thu, 22 Dec 2011 16:13:08 +0000 (16:13 +0000)]
Version 1.15.12.
Richard W.M. Jones [Thu, 22 Dec 2011 15:09:19 +0000 (15:09 +0000)]
tests: Add a simple liveness tests for qemu.
Richard W.M. Jones [Thu, 22 Dec 2011 13:12:43 +0000 (13:12 +0000)]
tests: Finalize the order we run the tests.
Richard W.M. Jones [Thu, 22 Dec 2011 13:05:34 +0000 (13:05 +0000)]
tests: Put test-tool and comment into own section.
Richard W.M. Jones [Thu, 22 Dec 2011 12:15:06 +0000 (12:15 +0000)]
tests: Split images -> tests/data + tests/guests
Richard W.M. Jones [Thu, 22 Dec 2011 12:00:44 +0000 (12:00 +0000)]
tests: Rename extratests -> tests/extra.
Richard W.M. Jones [Thu, 22 Dec 2011 11:35:43 +0000 (11:35 +0000)]
tests: Split regressions -> various subdirectories of tests/
Richard W.M. Jones [Thu, 22 Dec 2011 08:40:30 +0000 (08:40 +0000)]
tests: Rename capitests -> tests/c-api.
Richard W.M. Jones [Thu, 22 Dec 2011 08:34:57 +0000 (08:34 +0000)]
tests: Rename caution -> tests/qemu.
Richard W.M. Jones [Thu, 22 Dec 2011 08:34:08 +0000 (08:34 +0000)]
tests: Document new tests/ subdirectory.
Richard W.M. Jones [Thu, 22 Dec 2011 08:33:16 +0000 (08:33 +0000)]
docs: Arrange directory names in alphabetical order.
Richard W.M. Jones [Tue, 20 Dec 2011 18:26:20 +0000 (18:26 +0000)]
extra-tests: Add an extra suppression for OCaml 3.11.2 in RHEL 6.
Richard W.M. Jones [Wed, 14 Dec 2011 08:38:27 +0000 (08:38 +0000)]
fish: Allow events to be processed in guestfish.
Add 'event', 'list-events' and 'delete-event' commands so that event
handlers can be registered, listed and deleted in guestfish. The
event handler is a shell script snippet or host command.
Cc: Pádraig Brady <P@draigBrady.com>
Richard W.M. Jones [Wed, 14 Dec 2011 12:07:31 +0000 (12:07 +0000)]
python: Missing () in guestfs-python(1) examples.
Richard W.M. Jones [Fri, 9 Dec 2011 17:34:01 +0000 (17:34 +0000)]
Version 1.15.11.
Richard W.M. Jones [Fri, 9 Dec 2011 15:30:23 +0000 (15:30 +0000)]
fuse: Return EXIT_FAILURE if fuse_main fails.
fuse_main can return any non-zero value on error. In particular on
certain sorts of error such as unsupported -o options it returns 1
(not -1).
Therefore make sure any non-zero return is turned into EXIT_FAILURE.
(Thanks Pádraig Brady)
Richard W.M. Jones [Fri, 9 Dec 2011 09:49:37 +0000 (09:49 +0000)]
fish: -i option should fail if / is not mountable, but warn about others.
In particular this stops a problem with guestmount where if the -i
option half-recognizes the guest OS, it would mount the disk (and
fail, giving only warnings), leaving the mountpoint unusable.
(Thanks Pádraig Brady)
Richard W.M. Jones [Thu, 8 Dec 2011 11:39:58 +0000 (11:39 +0000)]
daemon: Fix utimens so it doesn't hang on named pipes (RHBZ#761460).
This also adds comprehensive tests for utimens on regular files,
directories (RHBZ#761451), named pipes (RHBZ#761460), symbolic links,
block and char devices.
Note that there is a small change in the (previously undefined)
semantics of this call: It now sets the time on a symbolic link
itself, not on what the symbolic link points to.
Richard W.M. Jones [Thu, 8 Dec 2011 11:15:18 +0000 (11:15 +0000)]
daemon: Allow utimens to work for directories (RHBZ#761451).
You don't need to open the file O_WRONLY in order to call futimens on
the file descriptor. Opening it O_WRONLY fails for directories.
Therefore open O_RDONLY instead.
Richard W.M. Jones [Wed, 7 Dec 2011 12:12:35 +0000 (12:12 +0000)]
copy-in/copy-out: Wait for the tar subprocess only (RHBZ#760669).
Richard W.M. Jones [Wed, 7 Dec 2011 11:46:43 +0000 (11:46 +0000)]
fish: Improve error messages when no OS / multi-boot OS found with inspection (RHBZ#760775).
Hilko Bengen [Tue, 6 Dec 2011 19:42:11 +0000 (20:42 +0100)]
let the user explicitly choose ruby and rake programs
Richard W.M. Jones [Tue, 6 Dec 2011 15:10:46 +0000 (15:10 +0000)]
Version 1.15.10.
Hilko Bengen [Mon, 5 Dec 2011 17:35:57 +0000 (18:35 +0100)]
Fix rpcgen post-processing for out-of-tree builds
Richard W.M. Jones [Mon, 5 Dec 2011 10:36:13 +0000 (10:36 +0000)]
ruby: Use RSTRING_PTR, RSTRING_LEN for compat with Ruby 1.9 (RHBZ#760000).
Wanlong Gao [Mon, 5 Dec 2011 10:06:43 +0000 (18:06 +0800)]
blkid: split the RHEL5 which can't support some options
RHEL5 shoult not support '-p', '-i' and '-o export' options.
But we just split it according to the '-p' option.
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Wanlong Gao [Mon, 5 Dec 2011 08:57:22 +0000 (16:57 +0800)]
TODO: remove the implemented command blkid
Remove the implemented command blkid from TODO lists.
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Richard W.M. Jones [Sun, 4 Dec 2011 16:47:37 +0000 (16:47 +0000)]
Revert "blkid: Use -c /dev/null because RHEL 5 blkid doesn't have -p option."
This reverts commit
6533491b178d18bfab8240cf093be4ef9b547548.
Richard W.M. Jones [Sun, 4 Dec 2011 16:47:29 +0000 (16:47 +0000)]
Revert "blkid: Fix mistake in previous commit."
This reverts commit
c48226a5026816b115ab63b50d3601531aff59dc.
Richard W.M. Jones [Sat, 3 Dec 2011 23:16:00 +0000 (23:16 +0000)]
blkid: Fix mistake in previous commit.
This updates commit
6533491b178d18bfab8240cf093be4ef9b547548.
Richard W.M. Jones [Sat, 3 Dec 2011 22:58:03 +0000 (22:58 +0000)]
blkid: Use -c /dev/null because RHEL 5 blkid doesn't have -p option.
Richard W.M. Jones [Sat, 3 Dec 2011 14:34:52 +0000 (14:34 +0000)]
daemon: Use pkg-config to locate Augeas CFLAGS / libraries.
Augeas 0.10 depends on libxml2, so this is now required in the
appliance (in fact, it was already present).
However this exposed two bugs:
(1) In libguestfs we use a home-brewed recipe for Augeas flags,
resulting in this error:
/usr/include/augeas.h:24:25: fatal error: libxml/tree.h: No such file or directory
(2) Augeas's own augeas.pc didn't include the libxml2 flags, so
it was broken. This requires a patch to Augeas 0.10, see:
https://www.redhat.com/archives/augeas-devel/2011-December/msg00008.html
Change to using pkg-config to detect Augeas. It is still an optional
library.
Richard W.M. Jones [Sat, 3 Dec 2011 12:59:27 +0000 (12:59 +0000)]
Version 1.15.9.
Wanlong Gao [Sat, 3 Dec 2011 09:07:47 +0000 (17:07 +0800)]
NEW API: add blkid command to print the attributes of the device
A NEW API blkid.
It can print the device attributes.
Use it after list-devices, we can list ower devices and the attributes
of each device.
Use it like:
blkid <device>
It's should be a usefull function.
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Richard W.M. Jones [Fri, 2 Dec 2011 15:03:19 +0000 (15:03 +0000)]
extra tests: Test that valgrind and libtool are installed.
Matthew Booth [Fri, 2 Dec 2011 14:04:20 +0000 (14:04 +0000)]
inspection: Add a test for MD device mapping in fstab
Check that we properly handle fstab entries of the form /dev/md0 and
/dev/md/foo.
RWMJ: Add a skip to test if the Augeas lens is not available.
Matthew Booth [Fri, 2 Dec 2011 14:04:19 +0000 (14:04 +0000)]
inspection: Handle MD devices in fstab
This patch fixes inspection when fstab contains devices md devices
specified as /dev/mdN. The appliance creates these devices without reference to
the guest's mdadm.conf so, for e.g. /dev/md0 in the guest will often be created
as /dev/md127 in the appliance. With this patch, we match the uuids of detected
md devices against uuids specified in mdadm.conf, and map them appropriately
when we encounter them in fstab.
Matthew Booth [Fri, 2 Dec 2011 14:04:18 +0000 (14:04 +0000)]
build: Add more suppressions for valgrind tests
Wanlong Gao [Fri, 2 Dec 2011 13:47:51 +0000 (21:47 +0800)]
mkfs: enable to make xfs filesystems when the device already has a filesystem
Just add the -f option to mkfs.xfs to make sure we can
make a xfs filesystem when the device already has a
filesystem on it.
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Hilko Bengen [Thu, 1 Dec 2011 21:06:30 +0000 (22:06 +0100)]
libguestfs: Added gnulib includes from builddir, as suggested by the Gnulib documentation
Since some modules (`getopt', for example) may copy files
into the build directory, `top_builddir/lib' is needed as well as
`top_srcdir/lib'. -- GNU Gnulib manual, section 2.2 Initial import
Richard W.M. Jones [Wed, 30 Nov 2011 17:08:33 +0000 (17:08 +0000)]
todo: Suggestion for UUIDs in /etc/fstab (thanks Joshua Daniel Franklin).
Richard W.M. Jones [Wed, 30 Nov 2011 17:08:27 +0000 (17:08 +0000)]
ocaml: Fix OCaml dependencies.
Richard W.M. Jones [Tue, 29 Nov 2011 23:31:30 +0000 (23:31 +0000)]
Version 1.15.8.
Richard W.M. Jones [Tue, 29 Nov 2011 18:20:05 +0000 (18:20 +0000)]
python: Memory leak: Free roots array along handle close path.
Richard W.M. Jones [Tue, 29 Nov 2011 18:19:54 +0000 (18:19 +0000)]
perl: Memory leak: Free roots array along handle close path.
Richard W.M. Jones [Tue, 29 Nov 2011 17:47:18 +0000 (17:47 +0000)]
ruby: Memory leak: Free roots array along handle close path.
Richard W.M. Jones [Tue, 29 Nov 2011 17:51:59 +0000 (17:51 +0000)]
extra tests: Add comments about what is not tested here.
Richard W.M. Jones [Tue, 29 Nov 2011 17:32:19 +0000 (17:32 +0000)]
extra tests: Absolute path for 'run' command.
Richard W.M. Jones [Tue, 29 Nov 2011 17:22:56 +0000 (17:22 +0000)]
extra tests: Split up and reorder tests more logically.
Richard W.M. Jones [Tue, 29 Nov 2011 17:20:11 +0000 (17:20 +0000)]
extra tests: Test virt-sparsify.
This adds the virt-sparsify --debug-gc option which causes
virt-sparsify to call Gc.compact before exiting, allowing
GC and memory problems to be tested.
Add an extratest which runs virt-sparsify under valgrind.
Richard W.M. Jones [Tue, 29 Nov 2011 17:14:18 +0000 (17:14 +0000)]
extra tests: Test virt-resize.
This adds the virt-resize --debug-gc option which causes
virt-resize to call Gc.compact before exiting, allowing
GC and memory problems to be tested.
Add an extratest which runs virt-resize under valgrind.
Richard W.M. Jones [Tue, 29 Nov 2011 17:13:45 +0000 (17:13 +0000)]
ocaml: Load test should call Gc.compact to flag memory errors.
Richard W.M. Jones [Tue, 29 Nov 2011 17:13:17 +0000 (17:13 +0000)]
ocaml: Fix memory leak in bindings for functions that return buffers.
RBufferOut binding didn't free the buffer after copying it onto
the OCaml heap.
Found by valgrind.
Richard W.M. Jones [Tue, 29 Nov 2011 16:11:21 +0000 (16:11 +0000)]
Version 1.15.7.
Richard W.M. Jones [Tue, 29 Nov 2011 13:13:44 +0000 (13:13 +0000)]
extra tests: Run C API tests under valgrind.
Richard W.M. Jones [Tue, 29 Nov 2011 13:13:06 +0000 (13:13 +0000)]
protocol: Memory leak: Free temporary buffer along recv_discard path.
Richard W.M. Jones [Tue, 29 Nov 2011 12:52:15 +0000 (12:52 +0000)]
extra tests: Run OCaml tests under valgrind.
Richard W.M. Jones [Tue, 29 Nov 2011 12:51:20 +0000 (12:51 +0000)]
extra tests: Split VG variable into VG / RUN_VG.
This is just code motion.
Richard W.M. Jones [Tue, 29 Nov 2011 12:25:34 +0000 (12:25 +0000)]
ocaml: Memory leak: Free roots array along handle close path.
Matthew Booth [Fri, 25 Nov 2011 13:16:54 +0000 (13:16 +0000)]
inspection: Cleanup iteration over fstab entries in inspect_fs_unix.c
Select non-comment labels using an augeas path to return the correct
nodes in the first instance, rather than applying a regular expression
to all results.
There is no functional change to the code.
RWMJ:
- Rebased to current HEAD.
- Move variable decls to top of function.
- Some whitespace changes.
- Remove check for errors from snprintf since it can never happen.
Richard W.M. Jones [Mon, 28 Nov 2011 20:40:01 +0000 (20:40 +0000)]
inspection: Add outline support for GNU/Hurd.
Richard W.M. Jones [Mon, 28 Nov 2011 19:12:44 +0000 (19:12 +0000)]
fish: When -m option fails, canonicalize device names that are printed.
The error message now looks like this:
guestfish: '/dev/vda6' could not be mounted. Did you mean one of these?
/dev/sda1 (ext4)
/dev/vg_f15x32/lv_root (ext4)
/dev/vg_f15x32/lv_swap (swap)
Note that '/dev/sda1' has been canonicalized.
Richard W.M. Jones [Mon, 28 Nov 2011 19:07:30 +0000 (19:07 +0000)]
fish: Rearrange code for displaying mountpoints when -m option fails.
This also frees the list returned by guestfs_list_filesystems.
Richard W.M. Jones [Fri, 25 Nov 2011 08:34:59 +0000 (08:34 +0000)]
docs: Tidy up documentation for md-stop.
This cleans up commit
cbd1c45d95c530c8d94103dcc2c521bf5501ef59.
Richard W.M. Jones [Thu, 24 Nov 2011 20:28:02 +0000 (20:28 +0000)]
Version 1.15.6.
Richard W.M. Jones [Thu, 24 Nov 2011 20:17:57 +0000 (20:17 +0000)]
ubuntu: Add extra suppressions for libnl.1 leaks.
Richard W.M. Jones [Thu, 24 Nov 2011 19:36:50 +0000 (19:36 +0000)]
Update API support.
Richard W.M. Jones [Thu, 24 Nov 2011 17:47:13 +0000 (17:47 +0000)]
extra-tests: Include valgrind suppressions file.
This updates commit
c55bad93fbde03a3daa6058913f02098c45e55f5.
Richard W.M. Jones [Thu, 24 Nov 2011 16:54:17 +0000 (16:54 +0000)]
regressions: Allow test-launch-race.pl to be skipped.
export SKIP_TEST_LAUNCH_RACE_PL=1
will cause this test to be skipped.
Richard W.M. Jones [Thu, 24 Nov 2011 16:27:36 +0000 (16:27 +0000)]
debian: Use mdadm -D --export instead of mdadm -DY.
For compatibility with mdadm on Debian Squeeze.
Richard W.M. Jones [Thu, 24 Nov 2011 14:08:09 +0000 (14:08 +0000)]
Add 'make extra-tests' rule and run extra tests.
These tests are optional, and require a special environment and
tools to run.
Richard W.M. Jones [Thu, 24 Nov 2011 15:50:54 +0000 (15:50 +0000)]
lib: Fix memory leak when debugging enabled (found by valgrind).
If you enabled debugging (eg. LIBGUESTFS_DEBUG=1) then every
debug message printed would be leaked.
Richard W.M. Jones [Thu, 24 Nov 2011 15:49:49 +0000 (15:49 +0000)]
test-tool: Fix multiple memory leaks found by valgrind.
Richard W.M. Jones [Thu, 24 Nov 2011 15:49:27 +0000 (15:49 +0000)]
filesystems: Fix memory leak found by valgrind.
Richard W.M. Jones [Thu, 24 Nov 2011 14:39:10 +0000 (14:39 +0000)]
part-disk: Change default alignment of this to 64K (128 sectors).
This is the minimum alignment. 1MB would be better.
Note that the exact behaviour is not defined in the API.
Richard W.M. Jones [Thu, 24 Nov 2011 14:06:31 +0000 (14:06 +0000)]
virt-alignment-scan: Add checks for when API calls return NULL.
In particular, virt-alignment-scan -a /dev/null would segfault
because of an error returned by parted.