1 /* Copyright (C) 2001-2024 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
23 #include "dirstream.h"
25 /* Read a directory entry from DIRP. */
27 __readdir64 (DIR *dirp
)
32 return __hurd_fail (EINVAL
), NULL
;
34 __libc_lock_lock (dirp
->__lock
);
38 if (dirp
->__ptr
- dirp
->__data
>= dirp
->__size
)
40 /* We've emptied out our buffer. Refill it. */
42 char *data
= dirp
->__data
;
43 mach_msg_type_number_t data_size
= dirp
->__size
;
47 if (err
= HURD_FD_PORT_USE (dirp
->__fd
,
58 dirp
->__size
= data_size
;
59 /* DATA now corresponds to entry index DIRP->__entry_ptr. */
60 dirp
->__entry_data
= dirp
->__entry_ptr
;
62 if (data
!= dirp
->__data
)
64 /* The data was passed out of line, so our old buffer is no
65 longer useful. Deallocate the old buffer and reset our
66 information for the new buffer. */
67 if (dirp
->__data
!= NULL
)
69 err
= __vm_deallocate (__mach_task_self (),
70 (vm_address_t
) dirp
->__data
,
75 dirp
->__allocation
= round_page (dirp
->__size
);
78 /* Reset the pointer into the buffer. */
79 dirp
->__ptr
= dirp
->__data
;
88 /* We trust the filesystem to return correct data and so we
92 dp
= (struct dirent64
*) dirp
->__ptr
;
93 dirp
->__ptr
+= dp
->d_reclen
;
96 /* Loop to ignore deleted files. */
97 } while (dp
->d_fileno
== 0);
99 __libc_lock_unlock (dirp
->__lock
);
104 libc_hidden_def (__readdir64
)
105 weak_alias (__readdir64
, readdir64
)