| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2005, 2007 Richard Kettlewell |
| 4 | * |
| 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. |
| 9 | * |
| 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. |
| 14 | * |
| 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/>. |
| 17 | */ |
| 18 | /** @file lib/speaker-protocol.c |
| 19 | * @brief Speaker/server protocol support |
| 20 | */ |
| 21 | |
| 22 | #include "common.h" |
| 23 | |
| 24 | #include <sys/socket.h> |
| 25 | #include <errno.h> |
| 26 | #include <unistd.h> |
| 27 | #include <stddef.h> |
| 28 | |
| 29 | #include "speaker-protocol.h" |
| 30 | #include "log.h" |
| 31 | |
| 32 | /** @brief Send a speaker message |
| 33 | * @param fd File descriptor to send to |
| 34 | * @param sm Pointer to message |
| 35 | */ |
| 36 | void speaker_send(int fd, const struct speaker_message *sm) { |
| 37 | int ret; |
| 38 | |
| 39 | do { |
| 40 | ret = write(fd, sm, sizeof *sm); |
| 41 | } while(ret < 0 && errno == EINTR); |
| 42 | if(ret < 0) |
| 43 | fatal(errno, "write"); |
| 44 | } |
| 45 | |
| 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 |
| 50 | */ |
| 51 | int speaker_recv(int fd, struct speaker_message *sm) { |
| 52 | int ret; |
| 53 | |
| 54 | do { |
| 55 | ret = read(fd, sm, sizeof *sm); |
| 56 | } while(ret < 0 && errno == EINTR); |
| 57 | if(ret < 0) { |
| 58 | if(errno != EAGAIN) fatal(errno, "recvmsg"); |
| 59 | return -1; |
| 60 | } |
| 61 | return ret; |
| 62 | } |
| 63 | |
| 64 | /* |
| 65 | Local Variables: |
| 66 | c-basic-offset:2 |
| 67 | comment-column:40 |
| 68 | fill-column:79 |
| 69 | indent-tabs-mode:nil |
| 70 | End: |
| 71 | */ |