| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
| 9 | struct 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 */ |
| 57 | struct kern_ipc_perm |
| 58 | { |
| 59 | spinlock_t lock; |
| 60 | int deleted; |
| 61 | key_t key; |
| 62 | uid_t uid; |
| 63 | gid_t gid; |
| 64 | uid_t cuid; |
| 65 | gid_t cgid; |
| 66 | mode_t mode; |
| 67 | unsigned long seq; |
| 68 | void *security; |
| 69 | }; |
| 70 | |
| 71 | #endif /* __KERNEL__ */ |
| 72 | |
| 73 | #endif /* _LINUX_IPC_H */ |
| 74 | |
| 75 | |