On Apr 25, 2006, at 5:54 PM, Marcin Krzysztof Porwit wrote:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
I'm playing around with the functions exposed via librpm. Using
Chapter 16 of the Red Hat RPM Guide as a crutch, I'm trying to read
the header information from a package. I'm pretty sure that I coded
it up correctly, but I get rather odd results. My code calls
headerDump() first, and then headerNEVRE(), and attempts to print out
the results. Here's the output that I get:
rhel4-devel[RPMs]% ~/rpmheader zsh-4.2.0-3.i386.rpm
Entry count: 7
CT TAG TYPE OFSET
COUNT
Entry : 000 (62)(unknown) BIN 0xffffff90
00000016
Entry : 001 (267)(unknown) BIN 0xffffff90
00000065
Entry : 002 (269)(unknown) STRING 0xffffff90
00000001
Entry : 003 (1000)(unknown) INT32 0xffffff90
00000001
Entry : 004 (1004)(unknown) BIN 0xffffff90
00000016
Entry : 005 (1005)(unknown) BIN 0xffffff90
00000065
Entry : 006 (1007)(unknown) INT32 0xffffff90
00000001
Name is [(null)]
Epoch is []
Version is [(null)]
Relase is [(null)]
Arch is [(null)]
What's bizarre here is that the RPMTAG definitions don't seem to line
up with the tag types. RPMTAG_NAME is defined as 1000, but is stored
as an INT32 type. I'm testing this on RPMs that ship with RHEL4ES, so
I'm assuming those were created properly, with all the fields
populated.
The platform ships with rpm-devel v4.3...
You're looking at a signature header, not the package metadata header.
Yes it was very stupid to define 2 tags that map to the number 1000.
I dinna do it ...
There's a different table that needs to be passed to map the numbers
to strings
if you want to look at signature headers. It's hardly worth the
bother, headerDump()
is really ancient and rather useless.
You might want to look at tools/rpmtool.c for various ways of slicing/
dicing headers out
of rpm packages. The code is mostly a prototype so I can see what
problems there are in
using the rpmlib API, but was working when I last looked abt 2 years
ago. And the code
is more recent than "The Red Hat RPM Guide" as well.
HTH
73 de Jeff
_______________________________________________
Rpm-list mailing list
Rpm-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/rpm-list
