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/* Copyright (C) 2001-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <dirent.h>
#include <stddef.h>
#include <string.h>
#include <hurd.h>
#include <hurd/fs.h>
#include <hurd/fd.h>
#include "dirstream.h"
/* Read a directory entry from DIRP. */
int
__readdir64_r (DIR *dirp, struct dirent64 *entry, struct dirent64 **result)
{
struct dirent64 *dp;
error_t err = 0;
if (dirp == NULL)
return __hurd_fail (EINVAL), EINVAL;
__libc_lock_lock (dirp->__lock);
do
{
if (dirp->__ptr - dirp->__data >= dirp->__size)
{
/* We've emptied out our buffer. Refill it. */
char *data = dirp->__data;
mach_msg_type_number_t data_size = dirp->__size;
int nentries;
if (err = HURD_FD_PORT_USE (dirp->__fd,
__dir_readdir (port,
&data, &data_size,
dirp->__entry_ptr,
-1, 0, &nentries)))
{
__hurd_fail (err);
dp = NULL;
break;
}
dirp->__size = data_size;
/* DATA now corresponds to entry index DIRP->__entry_ptr. */
dirp->__entry_data = dirp->__entry_ptr;
if (data != dirp->__data)
{
/* The data was passed out of line, so our old buffer is no
longer useful. Deallocate the old buffer and reset our
information for the new buffer. */
__vm_deallocate (__mach_task_self (),
(vm_address_t) dirp->__data,
dirp->__allocation);
dirp->__data = data;
dirp->__allocation = round_page (dirp->__size);
}
/* Reset the pointer into the buffer. */
dirp->__ptr = dirp->__data;
if (nentries == 0)
{
/* End of file. */
dp = NULL;
break;
}
/* We trust the filesystem to return correct data and so we
ignore NENTRIES. */
}
dp = (struct dirent64 *) dirp->__ptr;
dirp->__ptr += dp->d_reclen;
++dirp->__entry_ptr;
/* Loop to ignore deleted files. */
} while (dp->d_fileno == 0);
if (dp)
{
*entry = *dp;
memcpy (entry->d_name, dp->d_name, dp->d_namlen + 1);
*result = entry;
}
else
*result = NULL;
__libc_lock_unlock (dirp->__lock);
return dp ? 0 : err ? errno : 0;
}
weak_alias (__readdir64_r, readdir64_r)
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