2 * This file is part of DisOrder.
3 * Copyright (C) 2005, 2007 Richard Kettlewell
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 /** @file lib/speaker-protocol.c
19 * @brief Speaker/server protocol support
24 #include <sys/socket.h>
29 #include "speaker-protocol.h"
32 /** @brief Send a speaker message
33 * @param fd File descriptor to send to
34 * @param sm Pointer to message
36 void speaker_send(int fd, const struct speaker_message *sm) {
40 ret = write(fd, sm, sizeof *sm);
41 } while(ret < 0 && errno == EINTR);
43 fatal(errno, "write");
46 /** @brief Receive a speaker message
47 * @param fd File descriptor to read from
48 * @param sm Where to store received message
49 * @return -ve on @c EAGAIN, 0 at EOF, +ve on success
51 int speaker_recv(int fd, struct speaker_message *sm) {
55 ret = read(fd, sm, sizeof *sm);
56 } while(ret < 0 && errno == EINTR);
58 if(errno != EAGAIN) fatal(errno, "recvmsg");