X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fust-metadata.c;fp=src%2Fbin%2Flttng-sessiond%2Fust-metadata.c;h=f05c14c323505e9b35027953491a22e08a39cf88;hp=a657f7c5d3d26b62472e66ecef3f188e987ee121;hb=d77fb8c7d20b34918268fea841acd11c0507b034;hpb=e26422e8271348d43f1282cb2ee46e01ea73adbd

diff --git a/src/bin/lttng-sessiond/ust-metadata.c b/src/bin/lttng-sessiond/ust-metadata.c
index a657f7c5d..f05c14c32 100644
--- a/src/bin/lttng-sessiond/ust-metadata.c
+++ b/src/bin/lttng-sessiond/ust-metadata.c
@@ -217,6 +217,41 @@ void sanitize_ctf_identifier(char *out, const char *in)
 	}
 }
 
+static
+int print_escaped_ctf_string(struct ust_registry_session *session, const char *string)
+{
+	int ret;
+	size_t i;
+	char cur;
+
+	i = 0;
+	cur = string[i];
+	while (cur != '\0') {
+		switch (cur) {
+		case '\n':
+			ret = lttng_metadata_printf(session, "%s", "\\n");
+			break;
+		case '\\':
+		case '"':
+			ret = lttng_metadata_printf(session, "%c", '\\');
+			if (ret)
+				goto error;
+			/* We still print the current char */
+			/* Fallthrough */
+		default:
+			ret = lttng_metadata_printf(session, "%c", cur);
+			break;
+		}
+
+		if (ret)
+			goto error;
+
+		cur = string[++i];
+	}
+error:
+	return ret;
+}
+
 /* Called with session registry mutex held. */
 static
 int ust_metadata_enum_statedump(struct ust_registry_session *session,
@@ -869,6 +904,71 @@ int64_t measure_clock_offset(void)
 	return offset_best_sample.offset;
 }
 
+static
+int print_metadata_session_information(struct ust_registry_session *registry)
+{
+	int ret;
+	struct ltt_session *session = NULL;
+	char creation_time[ISO8601_LEN];
+
+	rcu_read_lock();
+	session = session_find_by_id(registry->tracing_id);
+	if (!session) {
+		ret = -1;
+		goto error;
+	}
+
+
+	/* Print the trace name */
+	ret = lttng_metadata_printf(registry, "	trace_name = \"");
+	if (ret) {
+		goto error;
+	}
+
+	/*
+	 * This is necessary since the creation time is present in the session
+	 * name when it is generated.
+	 */
+	if (session->has_auto_generated_name) {
+		ret = print_escaped_ctf_string(registry, DEFAULT_SESSION_NAME);
+	} else {
+		ret = print_escaped_ctf_string(registry, session->name);
+	}
+	if (ret) {
+		goto error;
+	}
+
+	ret = lttng_metadata_printf(registry, "\";\n");
+	if (ret) {
+		goto error;
+	}
+
+	/* Prepare creation time */
+	ret = time_t_to_ISO8601(creation_time, sizeof(creation_time),
+			session->creation_time);
+
+	if (ret) {
+		goto error;
+	}
+
+	/* Output the reste of the information */
+	ret = lttng_metadata_printf(registry,
+		"	trace_creation_time = \"%s\";\n"
+		"	hostname = \"%s\";\n",
+		creation_time,
+		session->hostname);
+	if (ret) {
+		goto error;
+	}
+
+error:
+	if (session) {
+		session_put(session);
+	}
+	rcu_read_unlock();
+	return ret;
+}
+
 /*
  * Should be called with session registry mutex held.
  */
@@ -880,7 +980,6 @@ int ust_metadata_session_statedump(struct ust_registry_session *session,
 	char uuid_s[UUID_STR_LEN],
 		clock_uuid_s[UUID_STR_LEN];
 	int ret = 0;
-	char hostname[HOST_NAME_MAX];
 
 	assert(session);
 
@@ -930,25 +1029,28 @@ int ust_metadata_session_statedump(struct ust_registry_session *session,
 	if (ret)
 		goto end;
 
-	/* ignore error, just use empty string if error. */
-	hostname[0] = '\0';
-	ret = gethostname(hostname, sizeof(hostname));
-	if (ret && errno == ENAMETOOLONG)
-		hostname[HOST_NAME_MAX - 1] = '\0';
 	ret = lttng_metadata_printf(session,
 		"env {\n"
-		"	hostname = \"%s\";\n"
 		"	domain = \"ust\";\n"
 		"	tracer_name = \"lttng-ust\";\n"
 		"	tracer_major = %u;\n"
-		"	tracer_minor = %u;\n",
-		hostname,
+		"	tracer_minor = %u;\n"
+		"	tracer_buffering_scheme = \"%s\";\n"
+		"	tracer_buffering_id = %u;\n"
+		"	isa_length = %u;\n",
 		major,
-		minor
+		minor,
+		app ? "pid" : "uid",
+		app ? (int) app->uid : (int) session->tracing_uid,
+		session->bits_per_long
 		);
 	if (ret)
 		goto end;
 
+	ret = print_metadata_session_information(session);
+	if (ret)
+		goto end;
+
 	/*
 	 * If per-application registry, we can output extra information
 	 * about the application.