1#ifndef _LINUX_IPC_H
2#define _LINUX_IPC_H
3
4#include <linux/types.h>
5
6#define IPC_PRIVATE ((__kernel_key_t) 0)
7
8/* Obsolete, used only for backwards compatibility and libc5 compiles */
9struct ipc_perm
10{
11	__kernel_key_t	key;
12	__kernel_uid_t	uid;
13	__kernel_gid_t	gid;
14	__kernel_uid_t	cuid;
15	__kernel_gid_t	cgid;
16	__kernel_mode_t	mode;
17	unsigned short	seq;
18};
19
20/* Include the definition of ipc64_perm */
21#include <asm/ipcbuf.h>
22
23/* resource get request flags */
24#define IPC_CREAT  00001000   /* create if key is nonexistent */
25#define IPC_EXCL   00002000   /* fail if key exists */
26#define IPC_NOWAIT 00004000   /* return error on wait */
27
28/* these fields are used by the DIPC package so the kernel as standard
29   should avoid using them if possible */
30
31#define IPC_DIPC 00010000  /* make it distributed */
32#define IPC_OWN  00020000  /* this machine is the DIPC owner */
33
34/*
35 * Control commands used with semctl, msgctl and shmctl
36 * see also specific commands in sem.h, msg.h and shm.h
37 */
38#define IPC_RMID 0     /* remove resource */
39#define IPC_SET  1     /* set ipc_perm options */
40#define IPC_STAT 2     /* get ipc_perm options */
41#define IPC_INFO 3     /* see ipcs */
42
43/*
44 * Version flags for semctl, msgctl, and shmctl commands
45 * These are passed as bitflags or-ed with the actual command
46 */
47#define IPC_OLD 0	/* Old version (no 32-bit UID support on many
48			   architectures) */
49#define IPC_64  0x0100  /* New version (support 32-bit UIDs, bigger
50			   message sizes, etc. */
51
52#ifdef __KERNEL__
53
54#define IPCMNI 32768  /* <= MAX_INT limit for ipc arrays (including sysctl changes) */
55
56/* used by in-kernel data structures */
57struct kern_ipc_perm
58{
59	key_t		key;
60	uid_t		uid;
61	gid_t		gid;
62	uid_t		cuid;
63	gid_t		cgid;
64	mode_t		mode;
65	unsigned long	seq;
66};
67
68#endif /* __KERNEL__ */
69
70#endif /* _LINUX_IPC_H */
71
72
73