+static
+int process_pid_tracker_node(xmlNodePtr pid_tracker_node,
+ struct lttng_handle *handle)
+{
+ int ret, child;
+ xmlNodePtr targets_node = NULL;
+ xmlNodePtr node;
+
+ assert(handle);
+ assert(pid_tracker_node);
+ /* get the targets node */
+ for (node = xmlFirstElementChild(pid_tracker_node); node;
+ node = xmlNextElementSibling(node)) {
+ if (!strcmp((const char *) node->name,
+ config_element_targets)) {
+ targets_node = node;
+ break;
+ }
+ }
+
+ if (!targets_node) {
+ ret = LTTNG_ERR_INVALID;
+ goto end;
+ }
+
+ /* Go through all pid_target node */
+ child = xmlChildElementCount(targets_node);
+ if (child == 0) {
+ /* The session is explicitly set to target nothing. */
+ ret = lttng_untrack_pid(handle, -1);
+ if (ret) {
+ goto end;
+ }
+ }
+ for (node = xmlFirstElementChild(targets_node); node;
+ node = xmlNextElementSibling(node)) {
+ xmlNodePtr pid_target_node = node;
+
+ /* get pid node and track it */
+ for (node = xmlFirstElementChild(pid_target_node); node;
+ node = xmlNextElementSibling(node)) {
+ if (!strcmp((const char *) node->name,
+ config_element_pid)) {
+ int64_t pid;
+ xmlChar *content = NULL;
+
+ content = xmlNodeGetContent(node);
+ if (!content) {
+ ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
+ goto end;
+ }
+
+ ret = parse_int(content, &pid);
+ free(content);
+ if (ret) {
+ ret = LTTNG_ERR_LOAD_INVALID_CONFIG;
+ goto end;
+ }
+
+ ret = lttng_track_pid(handle, (int) pid);
+ if (ret) {
+ goto end;
+ }
+ }
+ }
+ node = pid_target_node;
+ }
+
+end:
+ return ret;
+}
+
+