Port: Remove _GNU_SOURCE, defined in config.h
[lttng-tools.git] / src / bin / lttng-relayd / cmd-generic.c
1 /*
2 * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
3 * David Goulet <dgoulet@efficios.com>
4 * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License, version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc., 51
17 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #define _LGPL_SOURCE
21 #include <assert.h>
22
23 #include <common/common.h>
24
25 #include "cmd-generic.h"
26
27 int cmd_recv(struct lttcomm_sock *sock, void *buf, size_t len)
28 {
29 int ret;
30
31 assert(sock);
32 assert(buf);
33
34 ret = sock->ops->recvmsg(sock, buf, len, 0);
35 if (ret < len) {
36 if (ret == 0) {
37 /* Orderly shutdown. Not necessary to print an error. */
38 DBG("Socket %d did an orderly shutdown", sock->fd);
39 } else {
40 ERR("Relay didn't receive valid add_stream struct size. "
41 "Expected %zu, got %d", len, ret);
42 }
43 ret = -1;
44 goto error;
45 }
46
47 error:
48 return ret;
49 }
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