#ifndef LTTNG_CTL_HELPER_H
#define LTTNG_CTL_HELPER_H
-#define _GNU_SOURCE
#include <stdio.h>
#include <common/sessiond-comm/sessiond-comm.h>
struct lttng_domain *src);
/*
- * Sends the lttcomm message to the session daemon and fills buf of the
+ * Sends the lttcomm message to the session daemon and fills buf if the
* returned data is not NULL.
*
* Return the size of the received data on success or else a negative lttng
* error code. If buf is NULL, 0 is returned on success.
*/
int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm,
- void *vardata, size_t varlen, void **buf);
+ const void *vardata, size_t vardata_len,
+ void **user_payload_buf, void **user_cmd_header_buf,
+ size_t *user_cmd_header_len);
+
+/*
+ * Calls lttng_ctl_ask_sessiond_varlen() with no expected command header.
+ */
+static inline
+int lttng_ctl_ask_sessiond_varlen_no_cmd_header(struct lttcomm_session_msg *lsm,
+ void *vardata, size_t vardata_len, void **user_payload_buf)
+{
+ return lttng_ctl_ask_sessiond_varlen(lsm, vardata,
+ vardata_len, user_payload_buf, NULL, NULL);
+}
/*
* Use this if no variable length data needs to be sent.
static inline
int lttng_ctl_ask_sessiond(struct lttcomm_session_msg *lsm, void **buf)
{
- return lttng_ctl_ask_sessiond_varlen(lsm, NULL, 0, buf);
+ return lttng_ctl_ask_sessiond_varlen_no_cmd_header(lsm, NULL, 0, buf);
}
+int lttng_check_tracing_group(void);
+
#endif /* LTTNG_CTL_HELPER_H */