| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1993-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 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. |
| 8 | |
| 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. |
| 13 | |
| 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 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #ifndef _DIRSTREAM_H |
| 19 | #define _DIRSTREAM_H 1 |
| 20 | |
| 21 | #include <sys/types.h> |
| 22 | |
| 23 | #include <libc-lock.h> |
| 24 | |
| 25 | /* Directory stream type. |
| 26 | |
| 27 | The miscellaneous Unix `readdir' implementations read directory data |
| 28 | into a buffer and return `struct dirent *' pointers into it. */ |
| 29 | |
| 30 | struct __dirstream |
| 31 | { |
| 32 | int fd; /* File descriptor. */ |
| 33 | |
| 34 | __libc_lock_define (, lock) /* Mutex lock for this structure. */ |
| 35 | |
| 36 | size_t allocation; /* Space allocated for the block. */ |
| 37 | size_t size; /* Total valid data in the block. */ |
| 38 | size_t offset; /* Current offset into the block. */ |
| 39 | |
| 40 | off_t filepos; /* Position of next entry to read. */ |
| 41 | |
| 42 | int errcode; /* Delayed error code. */ |
| 43 | |
| 44 | /* Directory block. We must make sure that this block starts |
| 45 | at an address that is aligned adequately enough to store |
| 46 | dirent entries. Using the alignment of "void *" is not |
| 47 | sufficient because dirents on 32-bit platforms can require |
| 48 | 64-bit alignment. We use "long double" here to be consistent |
| 49 | with what malloc uses. */ |
| 50 | char data[0] __attribute__ ((aligned (__alignof__ (long double)))); |
| 51 | }; |
| 52 | |
| 53 | #define _DIR_dirfd(dirp) ((dirp)->fd) |
| 54 | |
| 55 | #endif /* dirstream.h */ |