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      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 /*
     53  * These are used to wrap system calls.
     54  *
     55  * See architecture code for ugly details..
     56  */
     57 struct ipc_kludge {
     58 	struct msgbuf *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 
     81 #endif /* _LINUX_IPC_H */
     82