ipc.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:2k
- #ifndef _LINUX_IPC_H
- #define _LINUX_IPC_H
- #include <linux/types.h>
- #define IPC_PRIVATE ((__kernel_key_t) 0)
- /* Obsolete, used only for backwards compatibility and libc5 compiles */
- struct ipc_perm
- {
- __kernel_key_t key;
- __kernel_uid_t uid;
- __kernel_gid_t gid;
- __kernel_uid_t cuid;
- __kernel_gid_t cgid;
- __kernel_mode_t mode;
- unsigned short seq;
- };
- /* Include the definition of ipc64_perm */
- #include <asm/ipcbuf.h>
- /* resource get request flags */
- #define IPC_CREAT 00001000 /* create if key is nonexistent */
- #define IPC_EXCL 00002000 /* fail if key exists */
- #define IPC_NOWAIT 00004000 /* return error on wait */
- /* these fields are used by the DIPC package so the kernel as standard
- should avoid using them if possible */
-
- #define IPC_DIPC 00010000 /* make it distributed */
- #define IPC_OWN 00020000 /* this machine is the DIPC owner */
- /*
- * Control commands used with semctl, msgctl and shmctl
- * see also specific commands in sem.h, msg.h and shm.h
- */
- #define IPC_RMID 0 /* remove resource */
- #define IPC_SET 1 /* set ipc_perm options */
- #define IPC_STAT 2 /* get ipc_perm options */
- #define IPC_INFO 3 /* see ipcs */
- /*
- * Version flags for semctl, msgctl, and shmctl commands
- * These are passed as bitflags or-ed with the actual command
- */
- #define IPC_OLD 0 /* Old version (no 32-bit UID support on many
- architectures) */
- #define IPC_64 0x0100 /* New version (support 32-bit UIDs, bigger
- message sizes, etc. */
- #ifdef __KERNEL__
- #define IPCMNI 32768 /* <= MAX_INT limit for ipc arrays (including sysctl changes) */
- /* used by in-kernel data structures */
- struct kern_ipc_perm
- {
- key_t key;
- uid_t uid;
- gid_t gid;
- uid_t cuid;
- gid_t cgid;
- mode_t mode;
- unsigned long seq;
- };
- #endif /* __KERNEL__ */
- #endif /* _LINUX_IPC_H */