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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1997 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*LINTLIBRARY*/
/*
* readdir -- C library extension routine
*/
#include <sys/types.h>
#include <sys/dir.h>
#include <sys/dirent.h>
#include <limits.h>
#include <string.h>
#include <errno.h>
#include "libc.h"
static struct direct dc;
static struct direct64 dc64;
static struct direct64 *
internal_readdir(DIR *dirp)
{
struct dirent64 *dp; /* -> directory data */
int saveloc = 0;
if (dirp->dd_size != 0) {
dp = (struct dirent64 *)&dirp->dd_buf[dirp->dd_loc];
saveloc = dirp->dd_loc; /* save for possible EOF */
dirp->dd_loc += dp->d_reclen;
}
if (dirp->dd_loc >= dirp->dd_size)
dirp->dd_loc = dirp->dd_size = 0;
if (dirp->dd_size == 0 && /* refill buffer */
(dirp->dd_size = getdents64(dirp->dd_fd,
(struct dirent64 *)dirp->dd_buf, DIRBUF)) <= 0) {
if (dirp->dd_size == 0) /* This means EOF */
dirp->dd_loc = saveloc; /* EOF so save for telldir */
return (NULL); /* error or EOF */
}
dp = (struct dirent64 *)&dirp->dd_buf[dirp->dd_loc];
/* Copy dirent into direct */
dc64.d_ino = dp->d_ino;
dc64.d_reclen = dp->d_reclen;
dc64.d_namlen = (ushort_t)strlen(dp->d_name);
if (dc64.d_namlen > MAXNAMLEN) {
errno = ENAMETOOLONG;
return (NULL);
}
(void) strcpy(dc64.d_name, dp->d_name);
return (&dc64);
}
struct direct *
readdir(DIR *dirp)
{
if (internal_readdir(dirp) == NULL)
return (NULL);
/* Check for overflows */
if (dc64.d_ino > SIZE_MAX) {
errno = EOVERFLOW;
return (NULL);
}
/* Copy dirent into direct */
dc.d_ino = dc64.d_ino;
dc.d_reclen = dc64.d_reclen - 4;
dc.d_namlen = dc64.d_namlen;
(void) strcpy(dc.d_name, dc64.d_name);
return (&dc);
}
#if !defined(_LP64)
struct direct64 *
readdir64(DIR *dirp)
{
return (internal_readdir(dirp));
}
#endif
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