get_session_name
if (get_session_name(var, name, sizeof(name) - 1))
TEST_F(liveupdate_device, get_session_name)
ASSERT_EQ(get_session_name(session_fd, name_buf, sizeof(name_buf)), 0);
ASSERT_EQ(get_session_name(session_fd, name_buf, sizeof(name_buf)), 0);