1 /* $NetBSD: pwrite.c,v 1.6 2003/01/18 11:33:10 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 __RCSID("$NetBSD: pwrite.c,v 1.6 2003/01/18 11:33:10 thorpej Exp $"); 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include "namespace.h" 42 #include <sys/types.h> 43 #include <sys/syscall.h> 44 #include <unistd.h> 45 46 #ifdef __weak_alias 47 __weak_alias(pwrite,_sys_pwrite) 48 __weak_alias(_pwrite,_sys_pwrite) 49 #endif 50 51 ssize_t _sys_pwrite __P((int, const void *, size_t, off_t)); 52 53 /* 54 * This function provides 64-bit offset padding that 55 * is not supplied by GCC 1.X but is supplied by GCC 2.X. 56 */ 57 ssize_t 58 _sys_pwrite(fd, buf, nbyte, offset) 59 int fd; 60 const void *buf; 61 size_t nbyte; 62 off_t offset; 63 { 64 quad_t q; 65 int rv; 66 67 q = __syscall((quad_t)SYS_pwrite, fd, buf, nbyte, 0, offset); 68 if (/* LINTED constant */ sizeof (quad_t) == sizeof (register_t) || 69 /* LINTED constant */ BYTE_ORDER == LITTLE_ENDIAN) 70 rv = (int)q; 71 else 72 rv = (int)((u_quad_t)q >> 32); 73 return rv; 74 } 75