[unix-history] / usr / src / 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.
 *
 *	@(#)uio.h	7.8 (Berkeley) 4/15/91
 */

#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
da7c5cc6	1	/*
0417f663 KB	2	* Copyright (c) 1982, 1986 The Regents of the University of California.
0417f663 KB	3	* All rights reserved.
da7c5cc6	4	*
c0567266 KB	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.
af359dea C	32	*
af359dea C	33	* @(#)uio.h 7.8 (Berkeley) 4/15/91
da7c5cc6	34	*/
24596b53	35
91befe9c KB	36	#ifndef _UIO_H_
91befe9c KB	37	#define _UIO_H_
62894b51 BJ	38
	39	struct iovec {
	40	caddr_t iov_base;
	41	int iov_len;
	42	};
	43
5921d41a KM	44	enum uio_rw { UIO_READ, UIO_WRITE };
	45
	46	/*
	47	* Segment flag values.
	48	*/
	49	enum uio_seg {
	50	UIO_USERSPACE, /* from user data space */
	51	UIO_SYSSPACE, /* from system space */
	52	UIO_USERISPACE /* from user I space */
	53	};
	54
62894b51 BJ	55	struct uio {
	56	struct iovec *uio_iov;
	57	int uio_iovcnt;
4a99e034	58	off_t uio_offset;
62894b51	59	int uio_resid;
5921d41a KM	60	enum uio_seg uio_segflg;
5921d41a KM	61	enum uio_rw uio_rw;
e63f1764	62	struct proc *uio_procp;
62894b51 BJ	63	};
62894b51 BJ	64
ac83f353 KM	65	/*
	66	* Limits
	67	*/
	68	#define UIO_MAXIOV 1024 /* max 1K of iov's */
	69	#define UIO_SMALLIOV 8 /* 8 on stack, else malloc */
	70
8b461e0f DS	71	#ifndef KERNEL
	72
	73	#include <sys/cdefs.h>
	74
	75	__BEGIN_DECLS
	76	int readv __P((int, const struct iovec *, int));
	77	int writev __P((int, const struct iovec *, int));
	78	__END_DECLS
	79
	80	#endif /* !KERNEL */
	81
91befe9c	82	#endif /* !_UIO_H_ */