Re: [Libguestfs] [PATCH RFC] blkid: start using libblkid directly instead
On Wed, Feb 15, 2012 at 10:03:15AM +0000, Richard W.M. Jones wrote:
Karel, on a related topic, does libblkid always ignore the cache
(/run/blkid/blkid.tab etc)?
We go to some length to disable the cache in libguestfs, eg. calling
blkid -c /dev/null and/or blkid -p (this has to work on RHEL 5 which
didn't have the -p option).
Basically we never want the cache, we always want (lib)blkid to probe
the disk directly.
1) the low-level part of the library (blkid_probe_* functions and "blkid
-p") does not use the cache at all.
2) the "blkid -c /dev/null" is a workaround for high-level part if the
library.
IMHO for libguestfs is the best to use "1)" and on old systems with old
libblkid from e2fsprogs use "2)".
See also:
http://karelzak.blogspot.com/2012/02/libblkid-maintainers-brain-dump.html
Karel
--
Karel Zak <kzak(a)redhat.com>
http://karelzak.blogspot.com