X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=src%2Flib%2Flttng-ctl%2Flttng-ctl.c;h=146783fd3e5e09289ebb0d14d0606fd50a1c0aeb;hb=d31d3e8cf774b98a8ed46b8c7f6273364360f246;hp=9cb2eb4a695648bfb3f4002248ffdeae3a6d6d64;hpb=b4e3ceb9d379829bc5d6ec799f83086317aeafd8;p=lttng-tools.git

diff --git a/src/lib/lttng-ctl/lttng-ctl.c b/src/lib/lttng-ctl/lttng-ctl.c
index 9cb2eb4a6..146783fd3 100644
--- a/src/lib/lttng-ctl/lttng-ctl.c
+++ b/src/lib/lttng-ctl/lttng-ctl.c
@@ -1782,6 +1782,38 @@ error:
 	return ret;
 }
 
+int lttng_event_get_filter_string(struct lttng_event *event,
+	const char **filter_string)
+{
+	int ret = 0;
+	struct lttcomm_event_extended_header *ext_header;
+
+	if (!event || !filter_string) {
+		ret = -LTTNG_ERR_INVALID;
+		goto end;
+	}
+
+	ext_header = event->extended.ptr;
+
+	if (!ext_header) {
+		/*
+		 * This can happen since the lttng_event structure is
+		 * used for other tasks where this pointer is never set.
+		 */
+		*filter_string = NULL;
+		goto end;
+	}
+
+	if (ext_header->filter_len) {
+		*filter_string = ((const char *) (ext_header)) +
+			sizeof(*ext_header);
+	} else {
+		*filter_string = NULL;
+	}
+
+end:
+	return ret;
+}
 
 /*
  * Sets the tracing_group variable with name.