1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _UAPI_LINUX_IPC_H
3 #define _UAPI_LINUX_IPC_H
5 #include <linux/types.h>
7 #define IPC_PRIVATE ((__kernel_key_t) 0)
9 /* Obsolete, used only for backwards compatibility and libc5 compiles */
21 /* Include the definition of ipc64_perm */
22 #include <asm/ipcbuf.h>
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 */
29 /* these fields are used by the DIPC package so the kernel as standard
30 should avoid using them if possible */
32 #define IPC_DIPC 00010000 /* make it distributed */
33 #define IPC_OWN 00020000 /* this machine is the DIPC owner */
36 * Control commands used with semctl, msgctl and shmctl
37 * see also specific commands in sem.h, msg.h and shm.h
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 */
45 * Version flags for semctl, msgctl, and shmctl commands
46 * These are passed as bitflags or-ed with the actual command
48 #define IPC_OLD 0 /* Old version (no 32-bit UID support on many
50 #define IPC_64 0x0100 /* New version (support 32-bit UIDs, bigger
51 message sizes, etc. */
54 * These are used to wrap system calls.
56 * See architecture code for ugly details..
59 struct msgbuf __user *msgp;
76 /* Used by the DIPC package, try and avoid reusing it */
79 #define IPCCALL(version,op) ((version)<<16 | (op))
82 #endif /* _UAPI_LINUX_IPC_H */