+ while (iov[0].iov_len) {
+ ret = sendmsg(sock, &msg, 0);
+ if (ret < 0) {
+ if (errno == EINTR) {
+ continue;
+ } else {
+ /*
+ * Only warn about EPIPE when quiet mode is
+ * deactivated.
+ * We consider EPIPE as expected.
+ */
+ if (errno != EPIPE || !lttng_opt_quiet) {
+ PERROR("sendmsg");
+ }
+ goto end;
+ }
+ }
+ iov[0].iov_len -= ret;
+ iov[0].iov_base += ret;
+ }
+ ret = len;
+end:
+ return ret;
+}
+
+/*
+ * Send buf data of size len. Using sendmsg API.
+ * Only use with non-blocking sockets. The difference with the blocking version
+ * of the function is that this one does not retry to send on partial sends,
+ * except if the interruption was caused by a signal (EINTR).
+ *
+ * Return the size of sent data.
+ */
+LTTNG_HIDDEN
+ssize_t lttcomm_send_unix_sock_non_block(int sock, const void *buf, size_t len)
+{
+ struct msghdr msg;
+ struct iovec iov[1];
+ ssize_t ret;
+
+ memset(&msg, 0, sizeof(msg));
+
+ iov[0].iov_base = (void *) buf;
+ iov[0].iov_len = len;
+ msg.msg_iov = iov;
+ msg.msg_iovlen = 1;
+
+retry: