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