Differential D10439 Diff 28105 lib/libc/gen/readdir-compat11.c

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lib/libc/gen/readdir-compat11.c

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				/*
				* Copyright (c) 1983, 1993
				* The Regents of the University of California. All rights reserved.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				* 3. Neither the name of the University nor the names of its contributors
				* may be used to endorse or promote products derived from this software
				* without specific prior written permission.
				*
				* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
				* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
				* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
				* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
				* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
				* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
				* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
				* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
				* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*
				* from:
				* $FreeBSD$
				*/

				#if defined(LIBC_SCCS) && !defined(lint)
				static char sccsid[] = "@(#)readdir.c 8.3 (Berkeley) 9/29/94";
				#endif /* LIBC_SCCS and not lint */
				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

				#include "namespace.h"
				#include <sys/param.h>
				#define _WANT_FREEBSD11_DIRENT
				#include <dirent.h>
				#include <errno.h>
				#include <stddef.h>
				#include <stdlib.h>
				#include <string.h>
				#include <pthread.h>
				#include "un-namespace.h"

				#include "libc_private.h"
				#include "gen-private.h"
				#include "telldir.h"

				#include "gen-compat.h"

				static void
				freebsd11_cvtdirent(struct freebsd11_dirent dstdp, struct dirent srcdp)
				{

				dstdp->d_type = srcdp->d_type;
				dstdp->d_namlen = srcdp->d_namlen;
				dstdp->d_fileno = srcdp->d_fileno; /* truncate */
				dstdp->d_reclen = FREEBSD11_DIRSIZ(dstdp);
				bcopy(srcdp->d_name, dstdp->d_name, dstdp->d_namlen);
				bzero(dstdp->d_name + dstdp->d_namlen,
				dstdp->d_reclen - offsetof(struct freebsd11_dirent, d_name) -
				dstdp->d_namlen);
				}

				struct freebsd11_dirent *
				freebsd11_readdir(DIR *dirp)
				{
				struct freebsd11_dirent *dstdp;
				struct dirent *dp;

				if (__isthreaded)
				_pthread_mutex_lock(&dirp->dd_lock);
				dp = _readdir_unlocked(dirp, 1);
				if (dp != NULL) {
				if (dirp->dd_compat_de == NULL)
				dirp->dd_compat_de = malloc(sizeof(struct
				freebsd11_dirent));
				freebsd11_cvtdirent(dirp->dd_compat_de, dp);
				dstdp = dirp->dd_compat_de;
				} else
				dstdp = NULL;
				if (__isthreaded)
				_pthread_mutex_unlock(&dirp->dd_lock);

				return (dstdp);
				}

				int
				freebsd11_readdir_r(DIR dirp, struct freebsd11_dirent entry,
				struct freebsd11_dirent **result)
				{
				struct dirent xentry, *xresult;
				int error;

				error = __readdir_r(dirp, &xentry, &xresult);
				if (error != 0)
				return (error);
				if (xresult != NULL) {
				freebsd11_cvtdirent(entry, &xentry);
				*result = entry;
				} else
				*result = NULL;
				return (0);
				}

				__sym_compat(readdir, freebsd11_readdir, FBSD_1.0);
				__sym_compat(readdir_r, freebsd11_readdir_r, FBSD_1.0);