ipc.h (2123B)
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 */