1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/* O_*, F_*, FD_* bit values for GNU.
Copyright (C) 1993-2012 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/>. */
#ifndef _FCNTL_H
# error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
#endif
#include <sys/types.h>
/* File access modes. These are understood by io servers; they can be
passed in `dir_lookup', and are returned by `io_get_openmodes'.
Consequently they can be passed to `open', `hurd_file_name_lookup', and
`file_name_lookup'; and are returned by `fcntl' with the F_GETFL
command. */
/* In GNU, read and write are bits (unlike BSD). */
#ifdef __USE_GNU
# define O_READ O_RDONLY /* Open for reading. */
# define O_WRITE O_WRONLY /* Open for writing. */
# define O_EXEC 0x0004 /* Open for execution. */
# define O_NORW 0 /* Open without R/W access. */
#endif
/* POSIX.1 standard names. */
#define O_RDONLY 0x0001 /* Open read-only. */
#define O_WRONLY 0x0002 /* Open write-only. */
#define O_RDWR (O_RDONLY|O_WRONLY) /* Open for reading and writing. */
#define O_ACCMODE O_RDWR /* Mask for file access modes. */
#define O_LARGEFILE 0
/* File name translation flags. These are understood by io servers;
they can be passed in `dir_lookup', and consequently to `open',
`hurd_file_name_lookup', and `file_name_lookup'. */
#define O_CREAT 0x0010 /* Create file if it doesn't exist. */
#define O_EXCL 0x0020 /* Fail if file already exists. */
#ifdef __USE_GNU
# define O_NOLINK 0x0040 /* No name mappings on final component. */
# define O_NOTRANS 0x0080 /* No translator on final component. */
#endif
#ifdef __USE_XOPEN2K8
# define O_NOFOLLOW 0x00100000 /* Produce ENOENT if file is a symlink. */
# define O_DIRECTORY 0x00200000 /* Produce ENOTDIR if not a directory. */
#endif
/* I/O operating modes. These are understood by io servers; they can be
passed in `dir_lookup' and set or fetched with `io_*_openmodes'.
Consequently they can be passed to `open', `hurd_file_name_lookup',
`file_name_lookup', and `fcntl' with the F_SETFL command; and are
returned by `fcntl' with the F_GETFL command. */
#define O_APPEND 0x0100 /* Writes always append to the file. */
#define O_ASYNC 0x0200 /* Send SIGIO to owner when data is ready. */
#define O_FSYNC 0x0400 /* Synchronous writes. */
#define O_SYNC O_FSYNC
#ifdef __USE_GNU
# define O_NOATIME 0x0800 /* Don't set access time on read (owner). */
#endif
#ifdef __USE_MISC
# define O_SHLOCK 0x00020000 /* Open with shared file lock. */
# define O_EXLOCK 0x00040000 /* Open with exclusive file lock. */
#endif
/* These are lesser flavors of partial synchronization that are
implied by our one flag (O_FSYNC). */
#if defined __USE_POSIX199309 || defined __USE_UNIX98
# define O_DSYNC O_SYNC /* Synchronize data. */
# define O_RSYNC O_SYNC /* Synchronize read operations. */
#endif
/* The name O_NONBLOCK is unfortunately overloaded; it is both a file name
translation flag and an I/O operating mode. O_NDELAY is the deprecated
BSD name for the same flag, overloaded in the same way.
When used in `dir_lookup' (and consequently `open', `hurd_file_name_lookup',
or `file_name_lookup'), O_NONBLOCK says the open should return immediately
instead of blocking for any significant length of time (e.g., to wait
for carrier detect on a serial line). It is also saved as an I/O
operating mode, and after open has the following meaning.
When used in `io_*_openmodes' (and consequently `fcntl' with the F_SETFL
command), the O_NONBLOCK flag means to do nonblocking i/o: any i/o
operation that would block for any significant length of time will instead
fail with EAGAIN. */
#define O_NONBLOCK 0x0008 /* Non-blocking open or non-blocking I/O. */
#ifdef __USE_BSD
# define O_NDELAY O_NONBLOCK /* Deprecated. */
#endif
#ifdef __USE_GNU
/* Mask of bits which are understood by io servers. */
# define O_HURD (0xffff | O_EXLOCK | O_SHLOCK)
#endif
/* Open-time action flags. These are understood by `hurd_file_name_lookup'
and consequently by `open' and `file_name_lookup'. They are not preserved
once the file has been opened. */
#define O_TRUNC 0x00010000 /* Truncate file to zero length. */
#ifdef __USE_XOPEN2K8
# define O_CLOEXEC 0x00400000 /* Set FD_CLOEXEC. */
#endif
/* Controlling terminal flags. These are understood only by `open',
and are not preserved once the file has been opened. */
#ifdef __USE_GNU
# define O_IGNORE_CTTY 0x00080000 /* Don't do any ctty magic at all. */
#endif
/* `open' never assigns a controlling terminal in GNU. */
#define O_NOCTTY 0 /* Don't assign a controlling terminal. */
#ifdef __USE_BSD
/* Bits in the file status flags returned by F_GETFL. */
# define FREAD O_RDONLY
# define FWRITE O_WRONLY
/* Traditional BSD names the O_* bits. */
# define FASYNC O_ASYNC
# define FCREAT O_CREAT
# define FEXCL O_EXCL
# define FTRUNC O_TRUNC
# define FNOCTTY O_NOCTTY
# define FFSYNC O_FSYNC
# define FSYNC O_SYNC
# define FAPPEND O_APPEND
# define FNONBLOCK O_NONBLOCK
# define FNDELAY O_NDELAY
#endif
/* Values for the second argument to `fcntl'. */
#define F_DUPFD 0 /* Duplicate file descriptor. */
#define F_GETFD 1 /* Get file descriptor flags. */
#define F_SETFD 2 /* Set file descriptor flags. */
#define F_GETFL 3 /* Get file status flags. */
#define F_SETFL 4 /* Set file status flags. */
#if defined __USE_BSD || defined __USE_UNIX98 || defined __USE_XOPEN2K8
# define F_GETOWN 5 /* Get owner (receiver of SIGIO). */
# define F_SETOWN 6 /* Set owner (receiver of SIGIO). */
#endif
#define F_GETLK 7 /* Get record locking info. */
#define F_SETLK 8 /* Set record locking info (non-blocking). */
#define F_SETLKW 9 /* Set record locking info (blocking). */
#ifdef __USE_XOPEN2K8
# define F_DUPFD_CLOEXEC 1030 /* Duplicate, set FD_CLOEXEC on new one. */
#endif
/* File descriptor flags used with F_GETFD and F_SETFD. */
#define FD_CLOEXEC 1 /* Close on exec. */
#include <bits/types.h>
/* The structure describing an advisory lock. This is the type of the third
argument to `fcntl' for the F_GETLK, F_SETLK, and F_SETLKW requests. */
struct flock
{
int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
int l_whence; /* Where `l_start' is relative to (like `lseek'). */
#ifndef __USE_FILE_OFFSET64
__off_t l_start; /* Offset where the lock begins. */
__off_t l_len; /* Size of the locked area; zero means until EOF. */
#else
__off64_t l_start; /* Offset where the lock begins. */
__off64_t l_len; /* Size of the locked area; zero means until EOF. */
#endif
__pid_t l_pid; /* Process holding the lock. */
};
#ifdef __USE_LARGEFILE64
struct flock64
{
int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
int l_whence; /* Where `l_start' is relative to (like `lseek'). */
__off64_t l_start; /* Offset where the lock begins. */
__off64_t l_len; /* Size of the locked area; zero means until EOF. */
__pid_t l_pid; /* Process holding the lock. */
};
#endif
/* Values for the `l_type' field of a `struct flock'. */
#define F_RDLCK 1 /* Read lock. */
#define F_WRLCK 2 /* Write lock. */
#define F_UNLCK 3 /* Remove lock. */
/* Advise to `posix_fadvise'. */
#ifdef __USE_XOPEN2K
# define POSIX_FADV_NORMAL 0 /* No further special treatment. */
# define POSIX_FADV_RANDOM 1 /* Expect random page references. */
# define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
# define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
# define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
# define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
#endif
|
