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/* 53 * These are used to wrap system calls. 54 * 55 * See architecture code for ugly details.. 56 */ 57struct ipc_kludge { 58 struct msgbuf __user *msgp; 59 long msgtyp; 60}; 61 62#define SEMOP 1 63#define SEMGET 2 64#define SEMCTL 3 65#define SEMTIMEDOP 4 66#define MSGSND 11 67#define MSGRCV 12 68#define MSGGET 13 69#define MSGCTL 14 70#define SHMAT 21 71#define SHMDT 22 72#define SHMGET 23 73#define SHMCTL 24 74 75/* Used by the DIPC package, try and avoid reusing it */ 76#define DIPC 25 77 78#define IPCCALL(version,op) ((version)<<16 | (op)) 79 80#ifdef __KERNEL__ 81#include <linux/spinlock.h> 82 83#define IPCMNI 32768 /* <= MAX_INT limit for ipc arrays (including sysctl changes) */ 84 85/* used by in-kernel data structures */ 86struct kern_ipc_perm 87{ 88 spinlock_t lock; 89 int deleted; 90 int id; 91 key_t key; 92 uid_t uid; 93 gid_t gid; 94 uid_t cuid; 95 gid_t cgid; 96 mode_t mode; 97 unsigned long seq; 98 void *security; 99}; 100 101#endif /* __KERNEL__ */ 102 103#endif /* _LINUX_IPC_H */ 104