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__) || defined(__mips__)
36 // Annoyingly, the kernel requires this for 32-bit but rejects it for 64-bit.
37 // Mips64 is an exception to this, it requires the flag.
38 cmd |= IPC_64;
39 #endif
40 #if defined(SYS_msgctl)
41 return syscall(SYS_msgctl, id, cmd, buf);
42 #else
43 return syscall(SYS_ipc, MSGCTL, id, cmd, 0, buf, 0);
44 #endif
45 }
46
msgget(key_t key,int flags)47 int msgget(key_t key, int flags) {
48 #if defined(SYS_msgget)
49 return syscall(SYS_msgget, key, flags);
50 #else
51 return syscall(SYS_ipc, MSGGET, key, flags, 0, 0, 0);
52 #endif
53 }
54
msgrcv(int id,void * msg,size_t n,long type,int flags)55 ssize_t msgrcv(int id, void* msg, size_t n, long type, int flags) {
56 #if defined(SYS_msgrcv)
57 return syscall(SYS_msgrcv, id, msg, n, type, flags);
58 #else
59 return syscall(SYS_ipc, IPCCALL(1, MSGRCV), id, n, flags, msg, type);
60 #endif
61 }
62
msgsnd(int id,const void * msg,size_t n,int flags)63 int msgsnd(int id, const void* msg, size_t n, int flags) {
64 #if defined(SYS_msgsnd)
65 return syscall(SYS_msgsnd, id, msg, n, flags);
66 #else
67 return syscall(SYS_ipc, MSGSND, id, n, flags, msg, 0);
68 #endif
69 }
70