1 /* $OpenBSD: uio.h,v 1.11 2003/06/02 23:28:22 millert Exp $ */ 2 /* $NetBSD: uio.h,v 1.12 1996/02/09 18:25:45 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1982, 1986, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)uio.h 8.5 (Berkeley) 2/22/94 33 */ 34 35 #ifndef _SYS_UIO_H_ 36 #define _SYS_UIO_H_ 37 38 struct iovec { 39 void *iov_base; /* Base address. */ 40 size_t iov_len; /* Length. */ 41 }; 42 43 enum uio_rw { UIO_READ, UIO_WRITE }; 44 45 /* Segment flag values. */ 46 enum uio_seg { 47 UIO_USERSPACE, /* from user data space */ 48 UIO_SYSSPACE /* from system space */ 49 }; 50 51 #ifdef _KERNEL 52 struct uio { 53 struct iovec *uio_iov; /* pointer to array of iovecs */ 54 int uio_iovcnt; /* number of iovecs in array */ 55 off_t uio_offset; /* offset into file this uio corresponds to */ 56 size_t uio_resid; /* residual i/o count */ 57 enum uio_seg uio_segflg; /* see above */ 58 enum uio_rw uio_rw; /* see above */ 59 struct proc *uio_procp;/* process if UIO_USERSPACE */ 60 }; 61 62 /* 63 * Limits 64 */ 65 #define UIO_SMALLIOV 8 /* 8 on stack, else malloc */ 66 #endif /* _KERNEL */ 67 68 #define UIO_MAXIOV 1024 /* Deprecated, use IOV_MAX instead */ 69 70 #ifndef _KERNEL 71 #include <sys/cdefs.h> 72 73 __BEGIN_DECLS 74 #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) 75 ssize_t preadv(int, const struct iovec *, int, off_t); 76 ssize_t pwritev(int, const struct iovec *, int, off_t); 77 #endif /* !_POSIX_C_SOURCE && !_XOPEN_SOURCE */ 78 ssize_t readv(int, const struct iovec *, int); 79 ssize_t writev(int, const struct iovec *, int); 80 __END_DECLS 81 #else 82 int ureadc(int c, struct uio *); 83 84 int dofilereadv(struct proc *, int, struct file *, 85 const struct iovec *, int, off_t *, register_t *); 86 int dofilewritev(struct proc *, int, struct file *, 87 const struct iovec *, int, off_t *, register_t *); 88 89 #endif /* !_KERNEL */ 90 91 #endif /* !_SYS_UIO_H_ */ 92