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dff8da6b 1/* Copyright (C) 1995-2024 Free Software Foundation, Inc.
8a4b65b4 2 This file is part of the GNU C Library.
d2f5be2a 3
8a4b65b4 4 The GNU C Library is free software; you can redistribute it and/or
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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.
d2f5be2a 8
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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
41bdb6e2 12 Lesser General Public License for more details.
d2f5be2a 13
41bdb6e2 14 You should have received a copy of the GNU Lesser General Public
59ba27a6 15 License along with the GNU C Library; if not, see
5a82c748 16 <https://www.gnu.org/licenses/>. */
d2f5be2a 17
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18#ifndef _SYS_MSG_H
19#error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
20#endif
d2f5be2a 21
bba09d23 22#include <bits/types.h>
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23
24/* Define options for message queue functions. */
25#define MSG_NOERROR 010000 /* no error if message is too big */
d2f5be2a 26
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27/* Types used in the structure definition. */
28typedef unsigned short int msgqnum_t;
29typedef unsigned short int msglen_t;
30
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31
32/* Structure of record for one message inside the kernel.
33 The type `struct __msg' is opaque. */
34struct msqid_ds
35{
36 struct ipc_perm msg_perm; /* structure describing operation permission */
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37 __time_t msg_stime; /* time of last msgsnd command */
38 __time_t msg_rtime; /* time of last msgrcv command */
39 __time_t msg_ctime; /* time of last change */
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40 msgqnum_t msg_qnum; /* number of messages currently on queue */
41 msglen_t msg_qbytes; /* max number of bytes allowed on queue */
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42 __pid_t msg_lspid; /* pid of last msgsnd() */
43 __pid_t msg_lrpid; /* pid of last msgrcv() */
d2f5be2a 44};