Log error code's value when sessiond replies to a client

[lttng-tools.git] / src / lib / lttng-ctl / lttng-ctl.c

diff --git a/src/lib/lttng-ctl/lttng-ctl.c b/src/lib/lttng-ctl/lttng-ctl.c
index f879d8ddfd2ea7b036df41a12d256809cee3a715..42c9d13907f4594f60f70ec01bc76fa1242f91f0 100644 (file)
--- a/src/lib/lttng-ctl/lttng-ctl.c
+++ b/src/lib/lttng-ctl/lttng-ctl.c
@@ -1280,6 +1280,62 @@ int lttng_disable_channel(struct lttng_handle *handle, const char *name)
        return lttng_ctl_ask_sessiond(&lsm, NULL);
 }
 
+/*
+ *  Add PID to session tracker.
+ *  Return 0 on success else a negative LTTng error code.
+ */
+int lttng_track_pid(struct lttng_handle *handle, int pid)
+{
+       struct lttcomm_session_msg lsm;
+
+       /*
+        * NULL arguments are forbidden. No default values.
+        */
+       if (handle == NULL) {
+               return -LTTNG_ERR_INVALID;
+       }
+
+       memset(&lsm, 0, sizeof(lsm));
+
+       lsm.cmd_type = LTTNG_TRACK_PID;
+       lsm.u.pid_tracker.pid = pid;
+
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
+
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
+                       sizeof(lsm.session.name));
+
+       return lttng_ctl_ask_sessiond(&lsm, NULL);
+}
+
+/*
+ *  Remove PID from session tracker.
+ *  Return 0 on success else a negative LTTng error code.
+ */
+int lttng_untrack_pid(struct lttng_handle *handle, int pid)
+{
+       struct lttcomm_session_msg lsm;
+
+       /*
+        * NULL arguments are forbidden. No default values.
+        */
+       if (handle == NULL) {
+               return -LTTNG_ERR_INVALID;
+       }
+
+       memset(&lsm, 0, sizeof(lsm));
+
+       lsm.cmd_type = LTTNG_UNTRACK_PID;
+       lsm.u.pid_tracker.pid = pid;
+
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
+
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
+                       sizeof(lsm.session.name));
+
+       return lttng_ctl_ask_sessiond(&lsm, NULL);
+}
+
 /*
  *  Lists all available tracepoints of domain.
  *  Sets the contents of the events array.
@@ -1452,6 +1508,26 @@ int lttng_list_sessions(struct lttng_session **sessions)
        return ret / sizeof(struct lttng_session);
 }
 
+int lttng_set_session_shm_path(const char *session_name,
+               const char *shm_path)
+{
+       struct lttcomm_session_msg lsm;
+
+       if (session_name == NULL) {
+               return -LTTNG_ERR_INVALID;
+       }
+
+       memset(&lsm, 0, sizeof(lsm));
+       lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH;
+
+       lttng_ctl_copy_string(lsm.session.name, session_name,
+                       sizeof(lsm.session.name));
+       lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path,
+                       sizeof(lsm.u.set_shm_path.shm_path));
+
+       return lttng_ctl_ask_sessiond(&lsm, NULL);
+}
+
 /*
  *  Ask the session daemon for all available domains of a session.
  *  Sets the contents of the domains array.
@@ -1878,7 +1954,7 @@ int lttng_create_session_live(const char *name, const char *url,
        struct lttcomm_session_msg lsm;
        struct lttng_uri *uris = NULL;
 
-       if (name == NULL) {
+       if (name == NULL || timer_interval == 0) {
                return -LTTNG_ERR_INVALID;
        }
 
@@ -1914,6 +1990,51 @@ end:
        return ret;
 }
 
+/*
+ * List PIDs in the tracker.
+ *
+ * @enabled is set to whether the PID tracker is enabled.
+ * @pids is set to an allocated array of PIDs currently tracked. On
+ * success, @pids must be freed by the caller.
+ * @nr_pids is set to the number of entries contained by the @pids array.
+ *
+ * Returns 0 on success, else a negative LTTng error code.
+ */
+int lttng_list_tracker_pids(struct lttng_handle *handle,
+               int *_enabled, int32_t **_pids, size_t *_nr_pids)
+{
+       int ret, enabled = 1;
+       struct lttcomm_session_msg lsm;
+       size_t nr_pids;
+       int32_t *pids;
+
+       if (handle == NULL) {
+               return -LTTNG_ERR_INVALID;
+       }
+
+       memset(&lsm, 0, sizeof(lsm));
+       lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS;
+       lttng_ctl_copy_string(lsm.session.name, handle->session_name,
+                       sizeof(lsm.session.name));
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
+
+       ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids);
+       if (ret < 0) {
+               return ret;
+       }
+       nr_pids = ret / sizeof(int32_t);
+       if (nr_pids == 1 && pids[0] == -1) {
+               free(pids);
+               pids = NULL;
+               enabled = 0;
+               nr_pids = 0;
+       }
+       *_enabled = enabled;
+       *_pids = pids;
+       *_nr_pids = nr_pids;
+       return 0;
+}
+
 /*
  * lib constructor
  */