+
+/**
+ * Frees a TES array.
+ *
+ * @param tes TES array to free
+ * @return 0 if successful, or error USTCMD_ERR_ARG
+ */
+int ustcmd_free_tes(struct trace_event_status *tes)
+{
+ if (tes == NULL) {
+ return USTCMD_ERR_ARG;
+ }
+
+ unsigned int i = 0;
+ while (tes[i].name != NULL) {
+ free(tes[i].name);
+ ++i;
+ }
+ free(tes);
+
+ return 0;
+}
+
+/**
+ * Gets trace_events string for a given PID.
+ *
+ * @param tes Pointer to TES array to be filled (callee allocates, caller
+ * frees with `ustcmd_free_tes')
+ * @param pid Targeted PID
+ * @return 0 if successful, or -1 on error
+ */
+int ustcmd_get_tes(struct trace_event_status **tes,
+ const pid_t pid)
+{
+ char *big_str = NULL;
+ int result;
+ struct trace_event_status *tmp_tes = NULL;
+ unsigned int i = 0, tes_ind = 0;
+
+ if (tes == NULL) {
+ return -1;
+ }
+
+ result = ustcmd_send_cmd("list_trace_events", pid, &big_str);
+ if (result != 1) {
+ ERR("error while getting trace_event list");
+ return -1;
+ }
+
+ tmp_tes = (struct trace_event_status *)
+ zmalloc(sizeof(struct trace_event_status) *
+ (ustcmd_count_nl(big_str) + 1));
+ if (tmp_tes == NULL) {
+ ERR("Failed to allocate TES array");
+ return -1;
+ }
+
+ /* Parse received reply string (format: "[name]"): */
+ while (big_str[i] != '\0') {
+ char state;
+
+ sscanf(big_str + i, "trace_event: %a[^\n]",
+ &tmp_tes[tes_ind].name);
+ while (big_str[i] != '\n') {
+ ++i; /* Go to next '\n' */
+ }
+ ++i; /* Skip current pointed '\n' */
+ ++tes_ind;
+ }
+ tmp_tes[tes_ind].name = NULL;
+
+ *tes = tmp_tes;
+
+ free(big_str);
+ return 0;
+}
+