1 /* $NetBSD: pwrite.c,v 1.7 2003/08/07 16:44:04 agc 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 __RCSID("$NetBSD: pwrite.c,v 1.7 2003/08/07 16:44:04 agc Exp $"); 35 #endif /* LIBC_SCCS and not lint */ 36 37 #include "namespace.h" 38 #include <sys/types.h> 39 #include <sys/syscall.h> 40 #include <unistd.h> 41 42 #ifdef __weak_alias 43 __weak_alias(pwrite,_sys_pwrite) 44 __weak_alias(_pwrite,_sys_pwrite) 45 #endif 46 47 ssize_t _sys_pwrite __P((int, const void *, size_t, off_t)); 48 49 /* 50 * This function provides 64-bit offset padding that 51 * is not supplied by GCC 1.X but is supplied by GCC 2.X. 52 */ 53 ssize_t 54 _sys_pwrite(fd, buf, nbyte, offset) 55 int fd; 56 const void *buf; 57 size_t nbyte; 58 off_t offset; 59 { 60 quad_t q; 61 int rv; 62 63 q = __syscall((quad_t)SYS_pwrite, fd, buf, nbyte, 0, offset); 64 if (/* LINTED constant */ sizeof (quad_t) == sizeof (register_t) || 65 /* LINTED constant */ BYTE_ORDER == LITTLE_ENDIAN) 66 rv = (int)q; 67 else 68 rv = (int)((u_quad_t)q >> 32); 69 return rv; 70 } 71