Help with what I am doing wrong with the C interface ...

Hi folks,

I am not sure if this is the correct interface, however, I am trying
to develop a config backend for Samba that connects to Zookeeper. The
intent is that parts of Samba's smb.conf would be stored in zookeeper
to make life easier in clustered environments.

I am constrained to use C both by the code I am working with and by
inclination. The examples in C are somewhat sparse.

I am trying to use the sync interface at the moment and I get zero
children back when I call zoo_get_children, however, if I use cli_mt I
can see that there is one child node under /samba in zookeeper:

[root [ at ] localhost zookeeper-3.4.6]# ./src/c/cli_mt localhost:2181
Watcher SESSION_EVENT state = CONNECTED_STATE
Got a new session id: 0x14accb10de10004

ls /
time = 1 msec
/: rc = 0
samba
zookeeper
time = 1 msec
ls /samba
time = 1 msec
/samba: rc = 0
global
time = 1 msec

I am pretty certain that I am asking for the children of /samba as my
logging code shows me that I am feeding that path to zoo_get_children
and when I had a bug that appended a trailing slash I got error -8
back.

Here are what I think are the relevant parts of the code I have at the moment:

static void zoo_watcher(zhandle_t *zzh, int type, int state, const char *path,
void *context)

DEBUG(10, ("%s called\n",__func__));

...

zh = zookeeper_init(host_port, zoo_watcher, 30000, &myId, 0, 0);
if (!zh) {
DEBUG(10, ("Problem with zookeeper_init: %s\n",
strerror(errno)));

...

struct String_vector strings;
...

rc = zoo_get_children(zh, zookeeper_key, false, &strings);

There are hints in the test code for the C client interface that
perhaps I should be doing something real in the watcher function above
but I am not sure.

Any hints would be appreciated.