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099e26bd DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; only version 2 | |
7 | * of the License. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #include <lttngerr.h> | |
20 | ||
21 | #include "ust-comm.h" | |
22 | ||
23 | /* | |
24 | * Send msg containing a command to an UST application via sock and wait for | |
25 | * the reply. | |
26 | * | |
27 | * Return -1 on error or if reply fails else return 0. | |
28 | */ | |
29 | int ustcomm_send_command(int sock, struct lttcomm_ust_msg *msg) | |
30 | { | |
31 | ssize_t len; | |
32 | struct lttcomm_ust_reply reply; | |
33 | ||
34 | DBG("Sending UST command %d to sock %d", msg->cmd, sock); | |
35 | ||
36 | /* Send UST msg */ | |
37 | len = lttcomm_send_unix_sock(sock, msg, sizeof(*msg)); | |
38 | if (len < 0) { | |
39 | goto error; | |
40 | } | |
41 | ||
42 | DBG("Receiving UST reply on sock %d", sock); | |
43 | ||
44 | /* Get UST reply */ | |
45 | len = lttcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
46 | if (len < 0) { | |
47 | goto error; | |
48 | } | |
49 | ||
50 | if (reply.ret_code != LTTCOMM_OK) { | |
51 | goto error; | |
52 | } | |
53 | ||
54 | return 0; | |
55 | ||
56 | error: | |
57 | return -1; | |
58 | } |