Using GNU debuglink data

Example showing dwarf_add_debuglink_global_path.

An example using both dwarf_add_debuglink_global_path and dwarf_gnu_debuglink .

*/
int exampledebuglink(Dwarf_Debug dbg, Dwarf_Error* error)
{
    int      res = 0;
    char    *debuglink_path = 0;
    unsigned char *crc = 0;
    char    *debuglink_fullpath = 0;
    unsigned debuglink_fullpath_strlen = 0;
    unsigned buildid_type = 0;
    char *   buildidowner_name = 0;
    unsigned char *buildid_itself = 0;
    unsigned buildid_length = 0;
    char **  paths = 0;
    unsigned paths_count = 0;
    unsigned i = 0;
 
    /*  This is just an example if one knows
        of another place full-DWARF objects
        may be. "/usr/lib/debug" is automatically
        set. */
    res = dwarf_add_debuglink_global_path(dbg,
        "/some/path/debug",error);
    if (res != DW_DLV_OK) {
        /*  Something is wrong*/
        return res;
    }
    res = dwarf_gnu_debuglink(dbg,
        &debuglink_path,
        &crc,
        &debuglink_fullpath,
        &debuglink_fullpath_strlen,
        &buildid_type,
        &buildidowner_name,
        &buildid_itself,
        &buildid_length,
        &paths,
        &paths_count,
        error);
    if (res == DW_DLV_ERROR) {
        return res;
    }
    if (res == DW_DLV_NO_ENTRY) {
        /*  No such sections as .note.gnu.build-id
            or .gnu_debuglink  */
        return res;
    }
    if (debuglink_fullpath_strlen) {
        printf("debuglink     path: %s\n",debuglink_path);
        printf("crc length        : %u  crc: ",4);
        for (i = 0; i < 4;++i ) {
            printf("%02x",crc[i]);
        }
        printf("\n");
        printf("debuglink fullpath: %s\n",debuglink_fullpath);
    }
    if (buildid_length) {
        printf("buildid type      : %u\n",buildid_type);
        printf("Buildid owner     : %s\n",buildidowner_name);
        printf("buildid byte count: %u\n",buildid_length);
        printf(" ");
        /*   buildid_length should be 20. */
        for (i = 0; i < buildid_length;++i) {
            printf("%02x",buildid_itself[i]);
        }
        printf("\n");
    }
    printf("Possible paths count %u\n",paths_count);
    for ( ; i < paths_count; ++i ){
        printf("%2u: %s\n",i,paths[i]);
    }
    free(debuglink_fullpath);
    free(paths);
    return DW_DLV_OK;
}