From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Tue, 9 Aug 2016 17:03:00 +0000 (-0400)
Subject: Fix: pass NULL to config_load_session instead of an empty string
X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=commitdiff_plain;h=18e29540021469e0b0c515b4c3198b7be8fb0072

Fix: pass NULL to config_load_session instead of an empty string

The public lttng_load_session wrapper uses empty strings (strings
starting with \0) to express "any" session_name and the default
session load paths.

However, this is not expected by config_load_session which uses
NULLs to express these values.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/lib/lttng-ctl/load.c b/src/lib/lttng-ctl/load.c
index d1faf0269..df712782f 100644
--- a/src/lib/lttng-ctl/load.c
+++ b/src/lib/lttng-ctl/load.c
@@ -159,14 +159,18 @@ end:
 int lttng_load_session(struct lttng_load_session_attr *attr)
 {
 	int ret;
+	const char *url, *session_name;
 
 	if (!attr) {
 		ret = -LTTNG_ERR_INVALID;
 		goto end;
 	}
 
-	ret = config_load_session(attr->input_url, attr->session_name,
-			attr->overwrite, 0);
+	url = attr->input_url[0] != '\0' ? attr->input_url : NULL;
+	session_name = attr->session_name[0] != '\0' ?
+			attr->session_name : NULL;
+
+	ret = config_load_session(url, session_name, attr->overwrite, 0);
 
 end:
 	return ret;