projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| b688fc87 WJ |
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 | * | |
| 33 | * @(#)uio.h 7.8 (Berkeley) 4/15/91 | |
| 34 | */ | |
| 35 | ||
| 36 | #ifndef _UIO_H_ | |
| 37 | #define _UIO_H_ | |
| 38 | ||
| 39 | struct iovec { | |
| 40 | caddr_t iov_base; | |
| 41 | int iov_len; | |
| 42 | }; | |
| 43 | ||
| 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 | ||
| 55 | struct uio { | |
| 56 | struct iovec *uio_iov; | |
| 57 | int uio_iovcnt; | |
| 58 | off_t uio_offset; | |
| 59 | int uio_resid; | |
| 60 | enum uio_seg uio_segflg; | |
| 61 | enum uio_rw uio_rw; | |
| 62 | struct proc *uio_procp; | |
| 63 | }; | |
| 64 | ||
| 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 | ||
| 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 | ||
| 82 | #endif /* !_UIO_H_ */ |