Message buffer and printf reentrancy patch

[Marcel Moolenaar]

On Sun, Jun 15, 2003 at 02:06:50PM +0100, Ian Dowse wrote:
> 
> Index: sys/sys/msgbuf.h
> ===================================================================
> RCS file: /dump/FreeBSD-CVS/src/sys/sys/msgbuf.h,v
> retrieving revision 1.20
> diff -u -r1.20 msgbuf.h
> --- sys/sys/msgbuf.h	28 Mar 2003 02:50:10 -0000	1.20
> +++ sys/sys/msgbuf.h	15 Jun 2003 12:00:45 -0000
> @@ -41,16 +41,32 @@
>  #define	MSG_MAGIC	0x063062
>  	u_int	msg_magic;
>  	int	msg_size;		/* size of buffer area */
> -	int	msg_bufx;		/* write pointer */
> -	int	msg_bufr;		/* read pointer */
> +	int	msg_wseq;		/* write sequence number */
> +	int	msg_rseq;		/* read sequence number */
> +	int	msg_seqmod;		/* range for sequence numbers */
>  	char	*msg_ptr;		/* pointer to buffer */
>  	u_int	msg_cksum;		/* checksum of contents */
>  };


Nit: please move the msg_ptr field before the int fields. There used
to be no internal padding, but on 64-bit platforms with an odd number
of ints, this will be the case.

-- 
 Marcel Moolenaar	  USPA: A-39004		 marcel at xcllnt.net