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 */ 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 __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 */ 83