X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;ds=sidebyside;f=ltt-sessiond%2Fust-comm.c;fp=ltt-sessiond%2Fust-comm.c;h=accd4276d27c48156bfebb3e0a92602f75b6c60f;hb=099e26bda04bd3e02eee5b0a17fc0d7f47e3f8ea;hp=0000000000000000000000000000000000000000;hpb=3817e7df7aa29d8f52f1a4909b4fa6b660494323;p=lttng-tools.git

diff --git a/ltt-sessiond/ust-comm.c b/ltt-sessiond/ust-comm.c
new file mode 100644
index 000000000..accd4276d
--- /dev/null
+++ b/ltt-sessiond/ust-comm.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C)  2011 - David Goulet <david.goulet@polymtl.ca>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; only version 2
+ * of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <lttngerr.h>
+
+#include "ust-comm.h"
+
+/*
+ * Send msg containing a command to an UST application via sock and wait for
+ * the reply.
+ *
+ * Return -1 on error or if reply fails else return 0.
+ */
+int ustcomm_send_command(int sock, struct lttcomm_ust_msg *msg)
+{
+	ssize_t len;
+	struct lttcomm_ust_reply reply;
+
+	DBG("Sending UST command %d to sock %d", msg->cmd, sock);
+
+	/* Send UST msg */
+	len = lttcomm_send_unix_sock(sock, msg, sizeof(*msg));
+	if (len < 0) {
+		goto error;
+	}
+
+	DBG("Receiving UST reply on sock %d", sock);
+
+	/* Get UST reply */
+	len = lttcomm_recv_unix_sock(sock, &reply, sizeof(reply));
+	if (len < 0) {
+		goto error;
+	}
+
+	if (reply.ret_code != LTTCOMM_OK) {
+		goto error;
+	}
+
+	return 0;
+
+error:
+	return -1;
+}