diff options
Diffstat (limited to 'include/linux/ipc.h')
| -rw-r--r-- | include/linux/ipc.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/include/linux/ipc.h b/include/linux/ipc.h new file mode 100644 index 00000000000..b291189737e --- /dev/null +++ b/include/linux/ipc.h @@ -0,0 +1,75 @@ +#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 +{ + spinlock_t lock; + int deleted; + key_t key; + uid_t uid; + gid_t gid; + uid_t cuid; + gid_t cgid; + mode_t mode; + unsigned long seq; + void *security; +}; + +#endif /* __KERNEL__ */ + +#endif /* _LINUX_IPC_H */ + + |