401bbe5b3855dd1c472fa092f45a14006d427b05
2 * This file is part of DisOrder.
3 * Copyright (C) 2005 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 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * 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, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
24 #include <sys/socket.h>
32 void speaker_send(int fd
, const struct speaker_message
*sm
, int datafd
) {
37 char size
[CMSG_SPACE(sizeof (int))];
41 memset(&m
, 0, sizeof m
);
44 iov
.iov_base
= (void *)sm
;
45 iov
.iov_len
= sizeof *sm
;
47 m
.msg_control
= (void *)&u
.cmsg
;
48 m
.msg_controllen
= sizeof u
;
49 memset(&u
, 0, sizeof u
);
50 u
.cmsg
.cmsg_len
= CMSG_LEN(sizeof (int));
51 u
.cmsg
.cmsg_level
= SOL_SOCKET
;
52 u
.cmsg
.cmsg_type
= SCM_RIGHTS
;
53 *(int *)CMSG_DATA(&u
.cmsg
) = datafd
;
56 ret
= sendmsg(fd
, &m
, 0);
57 } while(ret
< 0 && errno
== EINTR
);
59 fatal(errno
, "sendmsg");
62 int speaker_recv(int fd
, struct speaker_message
*sm
, int *datafd
) {
67 char size
[CMSG_SPACE(sizeof (int))];
71 memset(&m
, 0, sizeof m
);
74 iov
.iov_base
= (void *)sm
;
75 iov
.iov_len
= sizeof *sm
;
77 m
.msg_control
= (void *)&u
.cmsg
;
78 m
.msg_controllen
= sizeof u
;
79 memset(&u
, 0, sizeof u
);
80 u
.cmsg
.cmsg_len
= CMSG_LEN(sizeof (int));
81 u
.cmsg
.cmsg_level
= SOL_SOCKET
;
82 u
.cmsg
.cmsg_type
= SCM_RIGHTS
;
86 ret
= recvmsg(fd
, &m
, MSG_DONTWAIT
);
87 } while(ret
< 0 && errno
== EINTR
);
89 if(errno
!= EAGAIN
) fatal(errno
, "recvmsg");
92 if((size_t)m
.msg_controllen
>= CMSG_LEN(sizeof (int))) {
94 fatal(0, "got an unexpected file descriptor from recvmsg");
96 *datafd
= *(int *)CMSG_DATA(&u
.cmsg
);
109 /* arch-tag:VMDANBsSj5JSGuDZIL/zUw */