71 lines
2.5 KiB
C
71 lines
2.5 KiB
C
/* $NetBSD: pread.c,v 1.7 2003/08/07 16:44:03 agc Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: pread.c,v 1.7 2003/08/07 16:44:03 agc Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/types.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#ifdef __weak_alias
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__weak_alias(pread,_sys_pread)
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__weak_alias(_pread,_sys_pread)
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#endif
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ssize_t _sys_pread __P((int, void *, size_t, off_t));
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/*
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* This function provides 64-bit offset padding that
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* is not supplied by GCC 1.X but is supplied by GCC 2.X.
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*/
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ssize_t
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_sys_pread(fd, buf, nbyte, offset)
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int fd;
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void *buf;
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size_t nbyte;
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off_t offset;
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{
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quad_t q;
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int rv;
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q = __syscall((quad_t)SYS_pread, fd, buf, nbyte, 0, offset);
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if (/* LINTED constant */ sizeof (quad_t) == sizeof (register_t) ||
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/* LINTED constant */ BYTE_ORDER == LITTLE_ENDIAN)
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rv = (int)q;
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else
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rv = (int)((u_quad_t)q >> 32);
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return rv;
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}
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