Oh, thanks.<div> I have found that if my return type is remote_nonnull_string, the error will be happen, </div><div>but if the return type is int, it works ok.</div><div> <div class="gmail_quote"> 2012/2/14 Eric Blake <<a href="mailto:eblake@redhat.com">eblake@redhat.com</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 02/12/2012 11:26 AM, Áé˝Ă wrote: [please don't top-post on technical lists] > Sorry, > I just add the function prototypes in libvirt.h <a href="http://libvirt.in" target="_blank">libvirt.in</a><<a href="http://libvirt.in" target="_blank">http://libvirt.in</a>>, implement it in libvirt.c and call a hypervisor function in qemu_drivier.h. > basicly no other codes. It's easier to review your code for errors if you post the actual patches you have written so far. > > 2012/2/13 chang liu <<a href="mailto:lingjiao.lc@gmail.com">lingjiao.lc@gmail.com</a><mailto:<a href="mailto:lingjiao.lc@gmail.com">lingjiao.lc@gmail.com</a>>> <div class="im">> hi all, > Sorry to disturb you. > I wanna to add a new api to get some sheepdog cluster info, but I has get this error, I don't know how to do. > > I have add a function to daemon/remote.c that call the libvirt.c 's api, remoteDispatchConnectExecuteCommand, and here i get the return value. > > struct remote_connect_execute_command_ret { > remote_nonnull_string ret_val; > }; > typedef struct remote_connect_execute_command_ret remote_connect_execute_command_ret; > > > static int > remoteDispatchConnectExecuteCommand (struct qemud_server *server ATTRIBUTE_UNUSED, > struct qemud_client *client ATTRIBUTE_UNUSED, > virConnectPtr conn, > remote_message_header *hdr ATTRIBUTE_UNUSED, > remote_error *rerr, > remote_connect_execute_command_args *args, > remote_connect_execute_command_ret *ret) </div>If you're lucky, your new API won't need you to write any code in daemon/remote.c, but can instead be autogenerated as part of adding your new API to src/remote/remote_protocol.x. But it's hard to see what you might be doing wrong without seeing your full patch. -- Eric Blake <a href="mailto:eblake@redhat.com">eblake@redhat.com</a> +1-919-301-3266 Libvirt virtualization library <a href="http://libvirt.org" target="_blank">http://libvirt.org</a> -- libvir-list mailing list <a href="mailto:libvir-list@redhat.com">libvir-list@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/libvir-list" target="_blank">https://www.redhat.com/mailman/listinfo/libvir-list</a> </blockquote></div> </div>