Add listing session option

[lttng-tools.git] / liblttngctl / liblttngctl.c

diff --git a/liblttngctl/liblttngctl.c b/liblttngctl/liblttngctl.c
index d8481496d042b6c3c2b2c9375edf9c374e1a0aae..658f646f0fe7fc4c49e21d3917b7b08592959def 100644 (file)
--- a/liblttngctl/liblttngctl.c
+++ b/liblttngctl/liblttngctl.c
@@ -201,6 +201,51 @@ error:
        return ret;
 }
 
+/*
+ *  lttng_list_sessions
+ *
+ *  Ask the session daemon for all available sessions.
+ *
+ *  Return number of sessions
+ */
+size_t lttng_list_sessions(struct lttng_session **sessions)
+{
+       int ret, first = 0;
+       size_t size = 0;
+       struct lttng_session *ls = NULL;
+
+       lsm.cmd_type = LTTNG_LIST_SESSIONS;
+
+       ret = ask_sessiond();
+       if (ret < 0) {
+               goto error;
+       }
+
+       do {
+               ret = recvfrom_sessiond();
+               if (ret < 0) {
+                       goto error;
+               }
+
+               if (first == 0) {
+                       first = 1;
+                       size = llm.num_pckt;
+                       ls = malloc(sizeof(struct lttng_session) * size);
+               }
+               strncpy(ls[size - llm.num_pckt].name, llm.u.list_sessions.name,
+                               sizeof(ls[size - llm.num_pckt].name));
+               strncpy(ls[size - llm.num_pckt].uuid, llm.u.list_sessions.uuid,
+                               sizeof(ls[size - llm.num_pckt].uuid));
+       } while ((llm.num_pckt - 1) != 0);
+
+       *sessions = ls;
+
+       return size;
+
+error:
+       return ret;
+}
+
 /*
  *  lttng_connect_sessiond
  *