83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
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/* $NetBSD: compat_getdents.c,v 1.3 2008/04/28 20:22:59 martin Exp $ */
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/*-
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* Copyright (c) 2005 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF 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: compat_getdents.c,v 1.3 2008/04/28 20:22:59 martin Exp $");
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#endif /* LIBC_SCCS and not lint */
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#define __LIBC12_SOURCE__
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#include "namespace.h"
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#include <sys/types.h>
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#include <dirent.h>
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#include <compat/include/dirent.h>
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#include <string.h>
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/*
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* libc12 compatible getdents routine.
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*/
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int
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getdents(int fd, char *buf, size_t nbytes)
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{
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struct dirent *ndp, *nndp, *endp;
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struct dirent12 *odp;
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int rv;
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if ((rv = __getdents30(fd, buf, nbytes)) == -1)
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return rv;
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odp = (struct dirent12 *)(void *)buf;
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ndp = (struct dirent *)(void *)buf;
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endp = (struct dirent *)(void *)&buf[rv];
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/*
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* In-place conversion. This works because odp
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* is smaller than ndp, but it has to be done
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* in the right sequence.
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*/
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for (; ndp < endp; ndp = nndp) {
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nndp = _DIRENT_NEXT(ndp);
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/* XXX: avoid unaligned 64-bit access on sparc64 */
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odp->d_ino = ((u_int32_t *)(void *)&ndp->d_ino)[_QUAD_LOWWORD];
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if (ndp->d_namlen >= sizeof(odp->d_name))
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odp->d_namlen = sizeof(odp->d_name) - 1;
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else
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odp->d_namlen = (u_int8_t)ndp->d_namlen;
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odp->d_type = ndp->d_type;
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(void)memcpy(odp->d_name, ndp->d_name, (size_t)odp->d_namlen);
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odp->d_name[odp->d_namlen] = '\0';
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odp->d_reclen = _DIRENT_SIZE(odp);
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odp = _DIRENT_NEXT(odp);
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}
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return ((char *)(void *)odp) - buf;
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}
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