Quelle ipc.h Sprache: C

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_LINUX_IPC_H
#define _UAPI_LINUX_IPC_H

#include <linux/types.h>

#define IPC_PRIVATE ((__kernel_key_t) 0)

/* Obsolete, used only for backwards compatibility and libc5 compiles */
struct ipc_perm
{
__kernel_key_t key;
__kernel_uid_t uid;
__kernel_gid_t gid;
__kernel_uid_t cuid;
__kernel_gid_t cgid;
__kernel_mode_t mode;
unsigned short seq;
};

/* Include the definition of ipc64_perm */
#include <asm/ipcbuf.h>

/* resource get request flags */
#define IPC_CREAT  00001000   /* create if key is nonexistent */
#define IPC_EXCL   00002000   /* fail if key exists */
#define IPC_NOWAIT 00004000   /* return error on wait */

/* these fields are used by the DIPC package so the kernel as standard
   should avoid using them if possible */

#define IPC_DIPC 00010000  /* make it distributed */
#define IPC_OWN  00020000  /* this machine is the DIPC owner */

/*
* Control commands used with semctl, msgctl and shmctl
* see also specific commands in sem.h, msg.h and shm.h
*/
#define IPC_RMID 0     /* remove resource */
#define IPC_SET  1     /* set ipc_perm options */
#define IPC_STAT 2     /* get ipc_perm options */
#define IPC_INFO 3     /* see ipcs */

/*
* Version flags for semctl, msgctl, and shmctl commands
* These are passed as bitflags or-ed with the actual command
*/
#define IPC_OLD 0 /* Old version (no 32-bit UID support on many
   architectures) */
#define IPC_64  0x0100  /* New version (support 32-bit UIDs, bigger
   message sizes, etc. */

/*
* These are used to wrap system calls.
*
* See architecture code for ugly details..
*/
struct ipc_kludge {
struct msgbuf __user *msgp;
long msgtyp;
};

#define SEMOP   1
#define SEMGET   2
#define SEMCTL   3
#define SEMTIMEDOP  4
#define MSGSND  11
#define MSGRCV  12
#define MSGGET  13
#define MSGCTL  14
#define SHMAT  21
#define SHMDT  22
#define SHMGET  23
#define SHMCTL  24

/* Used by the DIPC package, try and avoid reusing it */
#define DIPC            25

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

#endif /* _UAPI_LINUX_IPC_H */

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