Re: RPM C API (and other fun acronyms)

["R. Tyler Ballance" <tyler@xxxxxxxxxxxxx>]

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> Are you talking about package files or installed packages from the
> local RPMDB?  The procedure is different for each one, but once you
> have a "Header" object for the package in question, use something like
> this to get the name, version, etc.:
>
>     char *N, *E, *V, *R, *A;
>
>     E = NULL;
>     headerNEVRA(hdr, (const char **) &N, (const char **) &E, (const  
> char **) &V, (const char **) &R,
>                 (const char **) &A);
>     printf("Package:  %s (%s:%s-%s) for %s\n", N, ((E)?(E):("0")),  
> V, R, A);
>     headerFreeData(N, RPM_STRING_TYPE);
>     headerFreeData(E, RPM_STRING_TYPE);
>     headerFreeData(V, RPM_STRING_TYPE);
>     headerFreeData(R, RPM_STRING_TYPE);
>     headerFreeData(A, RPM_STRING_TYPE);

NEVRA, now I get it :) That is what I was looking for. However, your  
snippets combined with Jeff's snippets don't work:

[tyler@localhost linux]$ ./a.out
error: no dbpath has been set
error: cannot open Packages database in
[tyler@localhost linux]$


With this code, any ideas?

int main(int argc, char **argv)
{
        rpmts transaction = rpmtsCreate(); // create the redhat  
database transaction handle
        rpmdbMatchIterator iter = rpmtsInitIterator(transaction,  
RPMTAG_PROVIDENAME, "bash", 0);
        Header h;

        while ((h = rpmdbNextIterator(iter)) != NULL)
        {
                char *N, *E, *V, *R, *A;

                E = NULL;
                headerNEVRA(h, (const char **) &N, (const char **)  
&E, (const char **) &V, (const char **) &R,
                        (const char **) &A);
                printf("Package:  %s (%s:%s-%s) for %s\n", N, ((E)? 
(E):("0")), V, R, A);
                headerFreeData(N, RPM_STRING_TYPE);
                headerFreeData(E, RPM_STRING_TYPE);
                headerFreeData(V, RPM_STRING_TYPE);
                headerFreeData(R, RPM_STRING_TYPE);
                headerFreeData(A, RPM_STRING_TYPE);
        }

        h = headerFree(h);
        iter = rpmdbFreeIterator(iter);
        transaction = rpmtsFree(transaction);

        return EXIT_SUCCESS;
}
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