1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/msg.h>
30
31 #include <sys/syscall.h>
32 #include <unistd.h>
33
msgctl(int id,int cmd,msqid_ds * buf)34 int msgctl(int id, int cmd, msqid_ds* buf) {
35 #if !defined(__LP64__)
36 // Annoyingly, the kernel requires this for 32-bit but rejects it for 64-bit.
37 cmd |= IPC_64;
38 #endif
39 #if defined(SYS_msgctl)
40 return syscall(SYS_msgctl, id, cmd, buf);
41 #else
42 return syscall(SYS_ipc, MSGCTL, id, cmd, 0, buf, 0);
43 #endif
44 }
45
msgget(key_t key,int flags)46 int msgget(key_t key, int flags) {
47 #if defined(SYS_msgget)
48 return syscall(SYS_msgget, key, flags);
49 #else
50 return syscall(SYS_ipc, MSGGET, key, flags, 0, 0, 0);
51 #endif
52 }
53
msgrcv(int id,void * msg,size_t n,long type,int flags)54 ssize_t msgrcv(int id, void* msg, size_t n, long type, int flags) {
55 #if defined(SYS_msgrcv)
56 return syscall(SYS_msgrcv, id, msg, n, type, flags);
57 #else
58 return syscall(SYS_ipc, IPCCALL(1, MSGRCV), id, n, flags, msg, type);
59 #endif
60 }
61
msgsnd(int id,const void * msg,size_t n,int flags)62 int msgsnd(int id, const void* msg, size_t n, int flags) {
63 #if defined(SYS_msgsnd)
64 return syscall(SYS_msgsnd, id, msg, n, flags);
65 #else
66 return syscall(SYS_ipc, MSGSND, id, n, flags, msg, 0);
67 #endif
68 }
69