question about rpmdbInitIterator()
ffesti at redhat.com
Sat Nov 6 21:02:37 UTC 2010
On 11/05/2010 03:48 AM, David Peterson wrote:
> Looking in rpmdb.h, I see the following function:
> rpmdbMatchIterator rpmdbInitIterator(rpmdb db, rpmTag rpmtag,
> const void* keyp, size_t keylen);
> My question is, what is the set of valid inputs that the function is
> supposed to
> handle for the 'keyp' parameter? For instance, is a regular
> expression for
> matching package names ok, or is the set of valid inputs more constrained
> than that?
It only allows either a string that is matched as is or NULL for all.
You can use rpmdbSetIteratorRE to restrict the results (typically using
RPMTAG_PACKAGES, NULL for rpmdbInitIterator). Unfortunately this does
not give you any performance benefit. RPM still loads and inspects all
headers. Sorry, the API (and the implementation) isn't very helpful in
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