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22895b47 RM |
1 | /* O_*, F_*, FD_* bit values. 4.4BSD/Generic version. |
2 | Copyright (C) 1991-2012 Free Software Foundation, Inc. | |
0d8733c4 UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
0d8733c4 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
0d8733c4 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 18 | |
5107cf1d | 19 | #ifndef _FCNTL_H |
22895b47 | 20 | #error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead." |
5107cf1d | 21 | #endif |
28f540f4 RM |
22 | |
23 | ||
24 | /* File access modes for `open' and `fcntl'. */ | |
25 | #define O_RDONLY 0 /* Open read-only. */ | |
26 | #define O_WRONLY 1 /* Open write-only. */ | |
27 | #define O_RDWR 2 /* Open read/write. */ | |
28 | ||
29 | ||
30 | /* Bits OR'd into the second argument to open. */ | |
31 | #define O_CREAT 0x0200 /* Create file if it doesn't exist. */ | |
32 | #define O_EXCL 0x0800 /* Fail if file already exists. */ | |
33 | #define O_TRUNC 0x0400 /* Truncate file to zero length. */ | |
22895b47 RM |
34 | #define O_NOCTTY 0x8000 /* Don't assign a controlling terminal. */ |
35 | #define O_ASYNC 0x0040 /* Send SIGIO to owner when data is ready. */ | |
36 | #define O_FSYNC 0x0080 /* Synchronous writes. */ | |
37 | #define O_SYNC O_FSYNC | |
38 | #ifdef __USE_MISC | |
39 | #define O_SHLOCK 0x0010 /* Open with shared file lock. */ | |
40 | #define O_EXLOCK 0x0020 /* Open with shared exclusive lock. */ | |
41 | #endif | |
42 | #ifdef __USE_XOPEN2K8 | |
43 | # define O_DIRECTORY 0x00200000 /* Must be a directory. */ | |
44 | # define O_NOFOLLOW 0x00000100 /* Do not follow links. */ | |
45 | # define O_CLOEXEC 0x00400000 /* Set close_on_exec. */ | |
46 | #endif | |
47 | ||
48 | /* All opens support large file sizes, so there is no flag bit for this. */ | |
49 | #ifdef __USE_LARGEFILE64 | |
50 | # define O_LARGEFILE 0 | |
51 | #endif | |
28f540f4 RM |
52 | |
53 | /* File status flags for `open' and `fcntl'. */ | |
54 | #define O_APPEND 0x0008 /* Writes append to the file. */ | |
55 | #define O_NONBLOCK 0x0004 /* Non-blocking I/O. */ | |
56 | ||
57 | #ifdef __USE_BSD | |
01ed6c51 | 58 | # define O_NDELAY O_NONBLOCK |
28f540f4 RM |
59 | #endif |
60 | ||
22895b47 RM |
61 | #ifdef __USE_BSD |
62 | /* Bits in the file status flags returned by F_GETFL. | |
63 | These are all the O_* flags, plus FREAD and FWRITE, which are | |
64 | independent bits set by which of O_RDONLY, O_WRONLY, and O_RDWR, was | |
65 | given to `open'. */ | |
66 | # define FREAD 1 | |
67 | # define FWRITE 2 | |
68 | ||
69 | /* Traditional BSD names the O_* bits. */ | |
70 | # define FASYNC O_ASYNC | |
71 | # define FFSYNC O_FSYNC | |
72 | # define FSYNC O_SYNC | |
73 | # define FAPPEND O_APPEND | |
74 | # define FNDELAY O_NDELAY | |
75 | #endif | |
76 | ||
28f540f4 RM |
77 | /* Mask for file access modes. This is system-dependent in case |
78 | some system ever wants to define some other flavor of access. */ | |
79 | #define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR) | |
80 | ||
81 | /* Values for the second argument to `fcntl'. */ | |
82 | #define F_DUPFD 0 /* Duplicate file descriptor. */ | |
83 | #define F_GETFD 1 /* Get file descriptor flags. */ | |
84 | #define F_SETFD 2 /* Set file descriptor flags. */ | |
85 | #define F_GETFL 3 /* Get file status flags. */ | |
86 | #define F_SETFL 4 /* Set file status flags. */ | |
22895b47 RM |
87 | #if defined __USE_BSD || defined __USE_UNIX98 || defined __USE_XOPEN2K8 |
88 | #define F_GETOWN 5 /* Get owner (receiver of SIGIO). */ | |
89 | #define F_SETOWN 6 /* Set owner (receiver of SIGIO). */ | |
28f540f4 RM |
90 | #endif |
91 | #define F_GETLK 7 /* Get record locking info. */ | |
22895b47 RM |
92 | #define F_SETLK 8 /* Set record locking info (non-blocking). */ |
93 | #define F_SETLKW 9 /* Set record locking info (blocking). */ | |
94 | /* Not necessary, we always have 64-bit offsets. */ | |
95 | #define F_GETLK64 F_GETLK /* Get record locking info. */ | |
96 | #define F_SETLK64 F_SETLK /* Set record locking info (non-blocking). */ | |
97 | #define F_SETLKW64 F_SETLKW/* Set record locking info (blocking). */ | |
98 | #ifdef __USE_XOPEN2K8 | |
99 | # define F_DUPFD_CLOEXEC 12 /* Duplicate file descriptor with | |
100 | close-on-exit set. */ | |
101 | #endif | |
28f540f4 RM |
102 | |
103 | /* File descriptor flags used with F_GETFD and F_SETFD. */ | |
104 | #define FD_CLOEXEC 1 /* Close on exec. */ | |
105 | ||
106 | ||
5107cf1d | 107 | #include <bits/types.h> |
28f540f4 RM |
108 | |
109 | /* The structure describing an advisory lock. This is the type of the third | |
110 | argument to `fcntl' for the F_GETLK, F_SETLK, and F_SETLKW requests. */ | |
111 | struct flock | |
112 | { | |
22895b47 RM |
113 | __off_t l_start; /* Offset where the lock begins. */ |
114 | __off_t l_len; /* Size of the locked area; zero means until EOF. */ | |
115 | __pid_t l_pid; /* Process holding the lock. */ | |
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116 | short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ |
117 | short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ | |
22895b47 RM |
118 | }; |
119 | ||
120 | #ifdef __USE_LARGEFILE64 | |
121 | /* Note this matches struct flock exactly. */ | |
122 | struct flock64 | |
123 | { | |
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124 | __off_t l_start; /* Offset where the lock begins. */ |
125 | __off_t l_len; /* Size of the locked area; zero means until EOF. */ | |
126 | __pid_t l_pid; /* Process holding the lock. */ | |
22895b47 RM |
127 | short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ |
128 | short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ | |
28f540f4 | 129 | }; |
22895b47 | 130 | #endif |
28f540f4 RM |
131 | |
132 | /* Values for the `l_type' field of a `struct flock'. */ | |
133 | #define F_RDLCK 1 /* Read lock. */ | |
134 | #define F_WRLCK 2 /* Write lock. */ | |
135 | #define F_UNLCK 3 /* Remove lock. */ | |
bb8e0116 UD |
136 | |
137 | /* Advise to `posix_fadvise'. */ | |
138 | #ifdef __USE_XOPEN2K | |
139 | # define POSIX_FADV_NORMAL 0 /* No further special treatment. */ | |
140 | # define POSIX_FADV_RANDOM 1 /* Expect random page references. */ | |
141 | # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */ | |
142 | # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */ | |
143 | # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */ | |
144 | # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */ | |
145 | #endif |