minix/include/sys/ipc.h

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/*
* SVID compatible ipc.h file
*/
#ifndef _SYS_IPC_H_
#define _SYS_IPC_H_
#include <sys/featuretest.h>
#include <sys/types.h>
/* Data structure used to pass permission information to IPC operations. */
struct ipc_perm
{
key_t key; /* Key. */
uid_t uid; /* Owner's user ID. */
gid_t gid; /* Owner's group ID. */
uid_t cuid; /* Creator's user ID. */
gid_t cgid; /* Creator's group ID. */
unsigned short int mode; /* Reader/write permission. */
unsigned short int __seq; /* Sequence number. */
};
/* X/Open required constants (same values as system 5) */
#define IPC_CREAT 001000 /* create entry if key does not exist */
#define IPC_EXCL 002000 /* fail if key exists */
#define IPC_NOWAIT 004000 /* error if request must wait */
#define IPC_PRIVATE (key_t)0 /* private key */
#define IPC_RMID 0 /* remove identifier */
#define IPC_SET 1 /* set options */
#define IPC_STAT 2 /* get options */
#ifdef __minix
#define IPC_INFO 3 /* See ipcs. */
#endif /* !__minix */
/*
* Macro to convert between ipc ids and array indices or sequence ids.
*/
#if defined(_NETBSD_SOURCE)
#define IXSEQ_TO_IPCID(ix,perm) (((perm._seq) << 16) | (ix & 0xffff))
#endif
#include <sys/cdefs.h>
__BEGIN_DECLS
key_t ftok(const char *, int);
__END_DECLS
#endif /* !_SYS_IPC_H_ */