[unix-history] / sys / sys / uio.h

/*
 * Copyright (c) 1982, 1986 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)uio.h	7.8 (Berkeley) 4/15/91
 *	$Id$
 */

#ifndef _UIO_H_
#define	_UIO_H_

struct iovec {
	caddr_t	iov_base;
	int	iov_len;
};

enum	uio_rw { UIO_READ, UIO_WRITE };

/*
 * Segment flag values.
 */
enum	uio_seg {
	UIO_USERSPACE,		/* from user data space */
	UIO_SYSSPACE,		/* from system space */
	UIO_USERISPACE		/* from user I space */
};

struct uio {
	struct	iovec *uio_iov;
	int	uio_iovcnt;
	off_t	uio_offset;
	int	uio_resid;
	enum	uio_seg uio_segflg;
	enum	uio_rw uio_rw;
	struct	proc *uio_procp;
};

 /*
  * Limits
  */
#define UIO_MAXIOV	1024		/* max 1K of iov's */
#define UIO_SMALLIOV	8		/* 8 on stack, else malloc */

#ifndef	KERNEL

#include <sys/cdefs.h>

__BEGIN_DECLS
int	readv __P((int, const struct iovec *, int));
int	writev __P((int, const struct iovec *, int));
__END_DECLS

#endif	/* !KERNEL */

#endif /* !_UIO_H_ */
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1982, 1986 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
78ed81a3	33	* from: @(#)uio.h 7.8 (Berkeley) 4/15/91
78ed81a3	34	* $Id$
15637ed4 RG	35	*/
	36
	37	#ifndef _UIO_H_
	38	#define _UIO_H_
	39
	40	struct iovec {
	41	caddr_t iov_base;
	42	int iov_len;
	43	};
	44
	45	enum uio_rw { UIO_READ, UIO_WRITE };
	46
	47	/*
	48	* Segment flag values.
	49	*/
	50	enum uio_seg {
	51	UIO_USERSPACE, /* from user data space */
	52	UIO_SYSSPACE, /* from system space */
	53	UIO_USERISPACE /* from user I space */
	54	};
	55
	56	struct uio {
	57	struct iovec *uio_iov;
	58	int uio_iovcnt;
	59	off_t uio_offset;
	60	int uio_resid;
	61	enum uio_seg uio_segflg;
	62	enum uio_rw uio_rw;
	63	struct proc *uio_procp;
	64	};
	65
	66	/*
	67	* Limits
	68	*/
	69	#define UIO_MAXIOV 1024 /* max 1K of iov's */
	70	#define UIO_SMALLIOV 8 /* 8 on stack, else malloc */
	71
	72	#ifndef KERNEL
	73
	74	#include <sys/cdefs.h>
	75
	76	__BEGIN_DECLS
	77	int readv __P((int, const struct iovec *, int));
	78	int writev __P((int, const struct iovec *, int));
	79	__END_DECLS
	80
	81	#endif /* !KERNEL */
	82
	83	#endif /* !_UIO_H_ */