X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=ltt-sessiond%2Fchannel.c;h=350bab6ab5a87b96fc12934d3b88cc4df73eba96;hp=818f6dcfd476d7d586a480da6ebd2219d7709729;hb=56fff0907d3a752030f384e6037d16ea7978de71;hpb=4bc385dd824ca7c10e3177346926350c86d04754

diff --git a/ltt-sessiond/channel.c b/ltt-sessiond/channel.c
index 818f6dcfd..350bab6ab 100644
--- a/ltt-sessiond/channel.c
+++ b/ltt-sessiond/channel.c
@@ -15,6 +15,7 @@
  * Place - Suite 330, Boston, MA  02111-1307, USA.
  */
 
+#include <string.h>
 #include <unistd.h>
 
 #include <lttng/lttng.h>
@@ -72,6 +73,35 @@ error_alloc:
 	return NULL;
 }
 
+/*
+ * Copy two ltt ust channel. Dst and src must be already allocated.
+ */
+int channel_ust_copy(struct ltt_ust_channel *dst,
+		struct ltt_ust_channel *src)
+{
+	struct ltt_ust_event *uevent, *new_uevent;
+
+	memcpy(dst, src, sizeof(struct ltt_ust_channel));
+	CDS_INIT_LIST_HEAD(&dst->events.head);
+
+	cds_list_for_each_entry(uevent, &src->events.head, list) {
+		new_uevent = malloc(sizeof(struct ltt_ust_event));
+		if (new_uevent == NULL) {
+			perror("malloc ltt_ust_event");
+			goto error;
+		}
+
+		memcpy(new_uevent, uevent, sizeof(struct ltt_ust_event));
+		cds_list_add(&new_uevent->list, &dst->events.head);
+		dst->events.count++;
+	}
+
+	return 0;
+
+error:
+	return -1;
+}
+
 /*
  * Disable kernel channel of the kernel session.
  */