1/* Copyright (C) 1995-2017 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18#ifndef _SYS_MSG_H
19# error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
20#endif
21
22#include <bits/types.h>
23
24/* Define options for message queue functions. */
25#define MSG_NOERROR 010000 /* no error if message is too big */
26#ifdef __USE_GNU
27# define MSG_EXCEPT 020000 /* recv any msg except of specified type */
28# define MSG_COPY 040000 /* copy (not remove) all queue messages */
29#endif
30
31/* Types used in the structure definition. */
32typedef __syscall_ulong_t msgqnum_t;
33typedef __syscall_ulong_t msglen_t;
34
35/* Structure of record for one message inside the kernel.
36 The type `struct msg' is opaque. */
37struct msqid_ds
38{
39 struct ipc_perm msg_perm; /* structure describing operation permission */
40 __time_t msg_stime; /* time of last msgsnd command */
41#ifndef __x86_64__
42 unsigned long int __glibc_reserved1;
43#endif
44 __time_t msg_rtime; /* time of last msgrcv command */
45#ifndef __x86_64__
46 unsigned long int __glibc_reserved2;
47#endif
48 __time_t msg_ctime; /* time of last change */
49#ifndef __x86_64__
50 unsigned long int __glibc_reserved3;
51#endif
52 __syscall_ulong_t __msg_cbytes; /* current number of bytes on queue */
53 msgqnum_t msg_qnum; /* number of messages currently on queue */
54 msglen_t msg_qbytes; /* max number of bytes allowed on queue */
55 __pid_t msg_lspid; /* pid of last msgsnd() */
56 __pid_t msg_lrpid; /* pid of last msgrcv() */
57 __syscall_ulong_t __glibc_reserved4;
58 __syscall_ulong_t __glibc_reserved5;
59};
60
61#ifdef __USE_MISC
62
63# define msg_cbytes __msg_cbytes
64
65/* ipcs ctl commands */
66# define MSG_STAT 11
67# define MSG_INFO 12
68
69/* buffer for msgctl calls IPC_INFO, MSG_INFO */
70struct msginfo
71 {
72 int msgpool;
73 int msgmap;
74 int msgmax;
75 int msgmnb;
76 int msgmni;
77 int msgssz;
78 int msgtql;
79 unsigned short int msgseg;
80 };
81
82#endif /* __USE_MISC */
83