On Dec 29, 2010, at 9:40 AM, [email protected] wrote:
> Hi Experts,
>
> I am new user using RPM libraries and C programming APIs for my project. I am
> using rpmlib 5.1.6. but I am not getting any proper documentation on this.
> Whatever document I can get by googling are of the version 4 of RPMlib and
> most of them are out-dated. I mean the functions/APIs and headers file (like
> dbindex.h, header.h etc) mentioned over there are no longer existing!!
>
(aside)
You likely should move rpm-5.1.6 -> rpm-5.1.9. That should be a painless
transition.
There's Doxygen content generated in tree when you build rpm.
Yes dbindex.h was removed like 8+ years ago.
Note that rpm5.org != rpm.org, these are different API's (albeit fairly
similar).
> My action items will be mainly:
>
> 1) Fresh Install.
> 2) Upgrade.
> 3) Downgrade.
> 4) Uninstall.
> 5) Abort of any actions.
> 6) To get the action status of any ongoing actions.
> 7) To get all package information. Identify what are they..??
> 8) Signature of the packages.
> 9) Package dependencies.
> 10) Search package by attributes (like name, version)
> 11) Checksum of a package.
> 12) Pre/post-install handling.
> 13) RPM DB connections:
> a) To list all the installed packages.
> b) To list downgradable packages
> c) To list non-downgradable packages
> d) List of the packages in sub-tree
> e) To get all package information.
>
OK. Basically you are attempting to write an installer.
> I have checked rpm.org and prm5.org documentations but no help from those…By
> googling, I have found some APIs (from rpmlib version 4) such as :
> 1) int rpmReadPackageInfo(int fd,
> Header * signatures,
> Header * hdr);
> 2) int rpmInstallPackage(char * rootdir,
> rpmdb db,
> int fd,
> char * prefix,
> int flags,
> rpmNotifyFunction notify,
> char * labelFormat,
> char * netsharedPath);
>
> but there are no longer supported in v5.1.6.
>
Yes. The install mode operations are in lib/rpminstall.c. Look at
rpmcliInstall().
The method to read package metadata is this
/**
* Return package header from file handle, verifying digests/signatures.
* @todo The rpmts either needs to become void *, or changed to -lrpmdb scope.
* @param ts transaction set
* @param fd file handle
* @param fn file name
* @retval hdrp address of header (or NULL)
* @return RPMRC_OK on success
*/
rpmRC rpmReadPackageFile(rpmts ts, FD_t fd,
const char * fn, /*...@null@*/ /*...@out@*/ Header * hdrp)
/*...@globals fileSystem, internalState @*/
/*...@modifies ts, fd, *hdrp, fileSystem, internalState @*/;
> When I tried to compile a cpp file with the following command:
> g++ -I/usr/include/rpm package-info.cpp -L/MM_BASE/host-tools/lib/rpm/
> -L/usr/lib/rpm -lrpmbuild -lrpm -lrpmdb -lrpmio
> /usr/bin/ld: cannot find -lrpmbuild
> collect2: ld returned 1 exit status
All RPM libraries have a version in the name.
So -lrpmbuild-5.1 ... etc is what is needed.
73 de Jeff
