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On Sep 27, 2006, at 5:17 PM, Jeff Johnson wrote:
On Sep 27, 2006, at 3:15 PM, R. Tyler Ballance wrote:
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Sorry for prolonging this thread, but I wanted to tack on one more
question ;)
Is there a sort of wildcard for the rpm db functions to where I
can essentially query similar to an `rpm -qa` and list all the
installed packages.
Am I naive in thinking that "*" would work? :)
Well, its a database, and so has records and record boundaries
which need to be taken into account.
Meanwhile, there's some logic to filter on tag values. Try the
following
rpm -qa a\*
rpm -qa 'arch=noarch'
rpm -qa '!arch=i*'
etc, etc ("arch" is a tag name, substitute any tag name displayed
by rpm --querytags, multiple items
are implicitly &&)
Note that the search is sequential through all headers and so dirt
slow. Adding --nodigest and --nosignature
will recover some of the speed back.
Note also that there are "optional" tags as well, that may or may
not exist, and so matching a value
that is not present is undefined and may not be to your expectations.
The matching "works" within the above caveats.
See <rpm/rpmdb.h> for the method to set from C after
rpmdbInitIterator() call, look for MIRE as in
Match Iterator Regular Expression.
I apologize for being dense, but after staring at the rpmdb.h header,
as well as the header documentation (via doxygen) and I'm still not
seeing a solution
I'm assuming you're referring to
int rpmdbSetIteratorRE (rpmdbMatchIterator mi, rpmTag tag,
rpmMireMode mode, const char *pattern);
So I'm wondering, do I just not use rpmdbInitIterator() (since I've
got to set the key string there) and will rpmdbSetIteratorRE() create
the proper iterator for dumping all the packages on the machine?
Again, I apologize if I'm coming across dense, I've been working on
code marshalling between C and C#, I'm just trying to find something
to dump the contents of the rpm db (i.e. the installed packages) in
such a manner that I can basically fill out an array of Header
structures.
Cheers,
- -R. Tyler Ballance
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