LXR linux/include/uapi/linux/ipc.h

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2#ifndef _UAPI_LINUX_IPC_H
   3#define _UAPI_LINUX_IPC_H
   4
   5#include <linux/types.h>
   6
   7#define IPC_PRIVATE ((__kernel_key_t) 0)  
   8
   9/* Obsolete, used only for backwards compatibility and libc5 compiles */
  10struct ipc_perm
  11{
  12        __kernel_key_t  key;
  13        __kernel_uid_t  uid;
  14        __kernel_gid_t  gid;
  15        __kernel_uid_t  cuid;
  16        __kernel_gid_t  cgid;
  17        __kernel_mode_t mode; 
  18        unsigned short  seq;
  19};
  20
  21/* Include the definition of ipc64_perm */
  22#include <asm/ipcbuf.h>
  23
  24/* resource get request flags */
  25#define IPC_CREAT  00001000   /* create if key is nonexistent */
  26#define IPC_EXCL   00002000   /* fail if key exists */
  27#define IPC_NOWAIT 00004000   /* return error on wait */
  28
  29/* these fields are used by the DIPC package so the kernel as standard
  30   should avoid using them if possible */
  31   
  32#define IPC_DIPC 00010000  /* make it distributed */
  33#define IPC_OWN  00020000  /* this machine is the DIPC owner */
  34
  35/* 
  36 * Control commands used with semctl, msgctl and shmctl 
  37 * see also specific commands in sem.h, msg.h and shm.h
  38 */
  39#define IPC_RMID 0     /* remove resource */
  40#define IPC_SET  1     /* set ipc_perm options */
  41#define IPC_STAT 2     /* get ipc_perm options */
  42#define IPC_INFO 3     /* see ipcs */
  43
  44/*
  45 * Version flags for semctl, msgctl, and shmctl commands
  46 * These are passed as bitflags or-ed with the actual command
  47 */
  48#define IPC_OLD 0       /* Old version (no 32-bit UID support on many
  49                           architectures) */
  50#define IPC_64  0x0100  /* New version (support 32-bit UIDs, bigger
  51                           message sizes, etc. */
  52
  53/*
  54 * These are used to wrap system calls.
  55 *
  56 * See architecture code for ugly details..
  57 */
  58struct ipc_kludge {
  59        struct msgbuf __user *msgp;
  60        long msgtyp;
  61};
  62
  63#define SEMOP            1
  64#define SEMGET           2
  65#define SEMCTL           3
  66#define SEMTIMEDOP       4
  67#define MSGSND          11
  68#define MSGRCV          12
  69#define MSGGET          13
  70#define MSGCTL          14
  71#define SHMAT           21
  72#define SHMDT           22
  73#define SHMGET          23
  74#define SHMCTL          24
  75
  76/* Used by the DIPC package, try and avoid reusing it */
  77#define DIPC            25
  78
  79#define IPCCALL(version,op)     ((version)<<16 | (op))
  80
  81
  82#endif /* _UAPI_LINUX_IPC_H */
  83