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