/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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#ifndef _LINUX_IPC_H

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#define _LINUX_IPC_H

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#include <linux/types.h>

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#define IPC_PRIVATE ((__kernel_key_t) 0)

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/* Obsolete, used only for backwards compatibility and libc5 compiles */

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struct ipc_perm

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{

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__kernel_key_t key;

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__kernel_uid_t uid;

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__kernel_gid_t gid;

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__kernel_uid_t cuid;

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__kernel_gid_t cgid;

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__kernel_mode_t mode;

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unsigned short seq;

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};

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/* Include the definition of ipc64_perm */

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#include <asm/ipcbuf.h>

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/* resource get request flags */

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#define IPC_CREAT 00001000 /* create if key is nonexistent */

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#define IPC_EXCL 00002000 /* fail if key exists */

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#define IPC_NOWAIT 00004000 /* return error on wait */

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/* these fields are used by the DIPC package so the kernel as standard

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should avoid using them if possible */

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#define IPC_DIPC 00010000 /* make it distributed */

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#define IPC_OWN 00020000 /* this machine is the DIPC owner */

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/*

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* Control commands used with semctl, msgctl and shmctl

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* see also specific commands in sem.h, msg.h and shm.h

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*/

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#define IPC_RMID 0 /* remove resource */

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#define IPC_SET 1 /* set ipc_perm options */

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#define IPC_STAT 2 /* get ipc_perm options */

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#define IPC_INFO 3 /* see ipcs */

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/*

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* Version flags for semctl, msgctl, and shmctl commands

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* These are passed as bitflags or-ed with the actual command

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*/

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#define IPC_OLD 0 /* Old version (no 32-bit UID support on many

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architectures) */

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#define IPC_64 0x0100 /* New version (support 32-bit UIDs, bigger

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message sizes, etc. */

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/*

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* These are used to wrap system calls.

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*

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* See architecture code for ugly details..

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*/

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struct ipc_kludge {

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struct msgbuf *msgp;

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long msgtyp;

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};

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#define SEMOP 1

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#define SEMGET 2

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#define SEMCTL 3

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#define SEMTIMEDOP 4

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#define MSGSND 11

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#define MSGRCV 12

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#define MSGGET 13

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#define MSGCTL 14

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#define SHMAT 21

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#define SHMDT 22

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#define SHMGET 23

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#define SHMCTL 24

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/* Used by the DIPC package, try and avoid reusing it */

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#define DIPC 25

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#define IPCCALL(version,op) ((version)<<16 | (op))

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#endif /* _LINUX_IPC_H */

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