X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=liblttngctl%2Fliblttngctl.c;h=e400775eaa97a6ffcd983cf4f6cd14da695ec18b;hp=bd7dcb0c5b6f87cd146a8ceb2c5e064892a621ee;hb=847177cda88eed885da0b5f0b66b03ffcd06c8f6;hpb=aaf975194bf54e911e7464b3723b2f247dbeb78b

diff --git a/liblttngctl/liblttngctl.c b/liblttngctl/liblttngctl.c
index bd7dcb0c5..e400775ea 100644
--- a/liblttngctl/liblttngctl.c
+++ b/liblttngctl/liblttngctl.c
@@ -24,7 +24,7 @@
 #include <string.h>
 #include <unistd.h>
 
-#include <lttng/liblttngctl.h>
+#include <lttng/lttng.h>
 
 #include "liblttsessiondcomm.h"
 #include "lttngerr.h"
@@ -39,7 +39,7 @@ static struct lttcomm_lttng_msg llm;
 
 /* Prototypes */
 static int check_tracing_group(const char *grp_name);
-static int ask_sessiond(enum lttcomm_command_type lct, void **buf);
+static int ask_sessiond(enum lttcomm_sessiond_command lct, void **buf);
 static int recv_data_sessiond(void *buf, size_t len);
 static int send_data_sessiond(void);
 static int set_session_daemon_path(void);
@@ -105,12 +105,17 @@ end:
  *
  *  Return size of data (only payload, not header).
  */
-static int ask_sessiond(enum lttcomm_command_type lct, void **buf)
+static int ask_sessiond(enum lttcomm_sessiond_command lct, void **buf)
 {
 	int ret;
 	size_t size;
 	void *data = NULL;
 
+	ret = lttng_connect_sessiond();
+	if (ret < 0) {
+		goto end;
+	}
+
 	lsm.cmd_type = lct;
 
 	/* Send command to session daemon */
@@ -131,7 +136,7 @@ static int ask_sessiond(enum lttcomm_command_type lct, void **buf)
 		goto end;
 	}
 
-	size = llm.size_payload;
+	size = llm.trace_name_offset + llm.data_size;
 	if (size == 0) {
 		goto end;
 	}
@@ -148,7 +153,7 @@ static int ask_sessiond(enum lttcomm_command_type lct, void **buf)
 	ret = size;
 
 end:
-	/* Reset lsm data struct */
+	lttng_disconnect_sessiond();
 	memset(&lsm, 0, sizeof(lsm));
 	return ret;
 }
@@ -167,6 +172,51 @@ const char *lttng_get_readable_code(int code)
 	return lttcomm_get_readable_code(code);
 }
 
+/*
+ *  lttng_ust_start_trace
+ *
+ *  Request a trace start for pid.
+ */
+int lttng_ust_start_trace(pid_t pid)
+{
+	int ret;
+
+	lsm.pid = pid;
+	ret = ask_sessiond(UST_START_TRACE, NULL);
+
+	return ret;
+}
+
+/*
+ *  lttng_ust_stop_trace
+ *
+ *  Request a trace stop for pid.
+ */
+int lttng_ust_stop_trace(pid_t pid)
+{
+	int ret;
+
+	lsm.pid = pid;
+	ret = ask_sessiond(UST_STOP_TRACE, NULL);
+
+	return ret;
+}
+
+/*
+ *  lttng_ust_create_trace
+ *
+ *  Request a trace creation for pid.
+ */
+int lttng_ust_create_trace(pid_t pid)
+{
+	int ret;
+
+	lsm.pid = pid;
+	ret = ask_sessiond(UST_CREATE_TRACE, NULL);
+
+	return ret;
+}
+
 /*
  *  lttng_ust_list_apps
  *
@@ -188,29 +238,67 @@ int lttng_ust_list_apps(pid_t **pids)
 	return ret / sizeof(pid_t);
 }
 
+/*
+ *  lttng_list_traces
+ *
+ *  Ask the session daemon for all traces (kernel and ust)
+ *  for the session identified by uuid.
+ *
+ *  Return the number of traces.
+ */
+int lttng_list_traces(uuid_t *uuid, struct lttng_trace **traces)
+{
+	int ret;
+
+	uuid_copy(lsm.session_uuid, *uuid);
+
+	ret = ask_sessiond(LTTNG_LIST_TRACES, (void **) traces);
+	if (ret < 0) {
+		return ret;
+	}
+
+	return ret / sizeof(struct lttng_trace);
+}
+
 /*
  *  lttng_create_session
  *
  *  Create a brand new session using name. Allocate
  *  the session_id param pointing to the UUID.
  */
-int lttng_create_session(char *name, char **session_id)
+int lttng_create_session(char *name, uuid_t *session_id)
 {
 	int ret;
-	char *uuid;
 
 	strncpy(lsm.session_name, name, sizeof(lsm.session_name));
+	lsm.session_name[sizeof(lsm.session_name) - 1] = '\0';
 
 	ret = ask_sessiond(LTTNG_CREATE_SESSION, NULL);
 	if (ret < 0) {
 		goto end;
 	}
 
-	/* Allocate UUID string length */
-	uuid = malloc(UUID_STR_LEN);
+	uuid_copy(*session_id, llm.session_uuid);
+
+end:
+	return ret;
+}
+
+/*
+ *  lttng_destroy_session
+ *
+ *  Destroy session using name.
+ */
+int lttng_destroy_session(uuid_t *uuid)
+{
+	int ret;
 
-	strncpy(uuid, llm.session_id, UUID_STR_LEN);
-	*session_id = uuid;
+	uuid_copy(lsm.session_uuid, *uuid);
+
+	ret = ask_sessiond(LTTNG_DESTROY_SESSION, NULL);
+	if (ret < 0) {
+		goto end;
+	}
 
 end:
 	return ret;
@@ -264,6 +352,34 @@ int lttng_connect_sessiond(void)
 	return 0;
 }
 
+/*
+ *  lttng_disconnect_sessiond
+ *
+ *  Clean disconnect the session daemon.
+ */
+int lttng_disconnect_sessiond(void)
+{
+	int ret = 0;
+
+	if (connected) {
+		ret = lttcomm_close_unix_sock(sessiond_socket);
+		sessiond_socket = 0;
+		connected = 0;
+	}
+
+	return ret;
+}
+
+/*
+ *  lttng_set_current_session_uuid
+ *
+ *  Set the session uuid for current lsm.
+ */
+void lttng_set_current_session_uuid(uuid_t *uuid)
+{
+	uuid_copy(lsm.session_uuid, *uuid);
+}
+
 /*
  *  lttng_set_tracing_group
  *
@@ -315,7 +431,7 @@ static int set_session_daemon_path(void)
 
 	/* Are we in the tracing group ? */
 	ret = check_tracing_group(tracing_group);
-	if (ret < 0) {
+	if (ret < 0 && getuid() != 0) {
 		if (sprintf(sessiond_sock_path, DEFAULT_HOME_CLIENT_UNIX_SOCK,
 					getenv("HOME")) < 0) {
 			return -ENOMEM;