From owner-freebsd-hackers  Sun Feb  7 11:12:31 1999
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Date: Sun, 7 Feb 1999 20:12:22 +0100
From: Guido van Rooij <guido@gvr.org>
To: freebsd-hackers@FreeBSD.ORG
Subject: struct ipc_perm
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I just noticed that our struct ipc_perm looks as follows:

struct ipc_perm {
	ushort	cuid;	/* creator user id */
	ushort	cgid;	/* creator group id */
	ushort	uid;	/* user id */
	ushort	gid;	/* group id */
	ushort	mode;	/* r/w permission */
	ushort	seq;	/* sequence # (to generate unique msg/sem/shm id) */
	key_t	key;	/* user specified msg/sem/shm key */
};

On SYSV systems, this struct looks as follows:
struct ipc_perm {
	ushort	uid;	/* user id */
	ushort	gid;	/* group id */
	ushort	cuid;	/* creator user id */
	ushort	cgid;	/* creator group id */
	ushort	mode;	/* r/w permission */
	ushort	seq;	/* sequence # (to generate unique msg/sem/shm id) */
	key_t	key;	/* user specified msg/sem/shm key */
};


Is there any reason why we have that different? Especially since in our
ipc.h, we see: 
/*      
 * SVID compatible ipc.h file 
 */   

-Guido


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