linux-headers (unknown)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _LINUX_IPC_H
3 #define _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 */
10 struct 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 */
58 struct ipc_kludge {
59 struct msgbuf *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 /* _LINUX_IPC_H */
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