mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
/* Copyright (C) 2001-2017 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <dirent.h>
|
|
#include <stddef.h>
|
|
#include <hurd.h>
|
|
#include <hurd/fs.h>
|
|
#include <hurd/fd.h>
|
|
#include "dirstream.h"
|
|
|
|
/* Read a directory entry from DIRP. */
|
|
struct dirent64 *
|
|
__readdir64 (DIR *dirp)
|
|
{
|
|
struct dirent64 *dp;
|
|
|
|
if (dirp == NULL)
|
|
{
|
|
errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
__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;
|
|
int nentries;
|
|
error_t err;
|
|
|
|
if (err = HURD_FD_PORT_USE (dirp->__fd,
|
|
__dir_readdir (port,
|
|
&data, &dirp->__size,
|
|
dirp->__entry_ptr,
|
|
-1, 0, &nentries)))
|
|
{
|
|
__hurd_fail (err);
|
|
dp = NULL;
|
|
break;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
__libc_lock_unlock (dirp->__lock);
|
|
|
|
return dp;
|
|
}
|
|
|
|
weak_alias (__readdir64, readdir64)
|