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| 1 | /* O_*, F_*, FD_* bit values for GNU. |
|---|---|
| 2 | Copyright (C) 1993-2024 Free Software Foundation, Inc. |
| 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 |
| 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. |
| 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 |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef _FCNTL_H |
| 20 | # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead." |
| 21 | #endif |
| 22 | |
| 23 | #include <sys/types.h> |
| 24 | |
| 25 | /* File access modes. These are understood by io servers; they can be |
| 26 | passed in `dir_lookup', and are returned by `io_get_openmodes'. |
| 27 | Consequently they can be passed to `open', `hurd_file_name_lookup', and |
| 28 | `file_name_lookup'; and are returned by `fcntl' with the F_GETFL |
| 29 | command. */ |
| 30 | |
| 31 | /* In GNU, read and write are bits (unlike BSD). */ |
| 32 | #ifdef __USE_GNU |
| 33 | # define O_READ O_RDONLY /* Open for reading. */ |
| 34 | # define O_WRITE O_WRONLY /* Open for writing. */ |
| 35 | # define O_EXEC 0x0004 /* Open for execution. */ |
| 36 | # define O_NORW 0 /* Open without R/W access. */ |
| 37 | #endif |
| 38 | /* POSIX.1 standard names. */ |
| 39 | #define O_RDONLY 0x0001 /* Open read-only. */ |
| 40 | #define O_WRONLY 0x0002 /* Open write-only. */ |
| 41 | #define O_RDWR (O_RDONLY|O_WRONLY) /* Open for reading and writing. */ |
| 42 | #define O_ACCMODE O_RDWR /* Mask for file access modes. */ |
| 43 | |
| 44 | #define O_LARGEFILE 0 |
| 45 | |
| 46 | |
| 47 | /* File name translation flags. These are understood by io servers; |
| 48 | they can be passed in `dir_lookup', and consequently to `open', |
| 49 | `hurd_file_name_lookup', and `file_name_lookup'. */ |
| 50 | |
| 51 | #define O_CREAT 0x0010 /* Create file if it doesn't exist. */ |
| 52 | #define O_EXCL 0x0020 /* Fail if file already exists. */ |
| 53 | #ifdef __USE_GNU |
| 54 | # define O_NOLINK 0x0040 /* No name mappings on final component. */ |
| 55 | # define O_NOTRANS 0x0080 /* No translator on final component. */ |
| 56 | #endif |
| 57 | |
| 58 | #ifdef __USE_XOPEN2K8 |
| 59 | # define O_NOFOLLOW 0x00100000 /* Produce ENOENT if file is a symlink. */ |
| 60 | # define O_DIRECTORY 0x00200000 /* Produce ENOTDIR if not a directory. */ |
| 61 | #endif |
| 62 | |
| 63 | |
| 64 | /* I/O operating modes. These are understood by io servers; they can be |
| 65 | passed in `dir_lookup' and set or fetched with `io_*_openmodes'. |
| 66 | Consequently they can be passed to `open', `hurd_file_name_lookup', |
| 67 | `file_name_lookup', and `fcntl' with the F_SETFL command; and are |
| 68 | returned by `fcntl' with the F_GETFL command. */ |
| 69 | |
| 70 | #define O_APPEND 0x0100 /* Writes always append to the file. */ |
| 71 | #define O_ASYNC 0x0200 /* Send SIGIO to owner when data is ready. */ |
| 72 | #define O_FSYNC 0x0400 /* Synchronous writes. */ |
| 73 | #define O_SYNC O_FSYNC |
| 74 | #ifdef __USE_GNU |
| 75 | # define O_NOATIME 0x0800 /* Don't set access time on read (owner). */ |
| 76 | #endif |
| 77 | #ifdef __USE_MISC |
| 78 | # define O_SHLOCK 0x00020000 /* Open with shared file lock. */ |
| 79 | # define O_EXLOCK 0x00040000 /* Open with exclusive file lock. */ |
| 80 | #endif |
| 81 | |
| 82 | /* These are lesser flavors of partial synchronization that are |
| 83 | implied by our one flag (O_FSYNC). */ |
| 84 | #if defined __USE_POSIX199309 || defined __USE_UNIX98 |
| 85 | # define O_DSYNC O_SYNC /* Synchronize data. */ |
| 86 | # define O_RSYNC O_SYNC /* Synchronize read operations. */ |
| 87 | #endif |
| 88 | |
| 89 | |
| 90 | /* The name O_NONBLOCK is unfortunately overloaded; it is both a file name |
| 91 | translation flag and an I/O operating mode. O_NDELAY is the deprecated |
| 92 | BSD name for the same flag, overloaded in the same way. |
| 93 | |
| 94 | When used in `dir_lookup' (and consequently `open', `hurd_file_name_lookup', |
| 95 | or `file_name_lookup'), O_NONBLOCK says the open should return immediately |
| 96 | instead of blocking for any significant length of time (e.g., to wait |
| 97 | for carrier detect on a serial line). It is also saved as an I/O |
| 98 | operating mode, and after open has the following meaning. |
| 99 | |
| 100 | When used in `io_*_openmodes' (and consequently `fcntl' with the F_SETFL |
| 101 | command), the O_NONBLOCK flag means to do nonblocking i/o: any i/o |
| 102 | operation that would block for any significant length of time will instead |
| 103 | fail with EAGAIN. */ |
| 104 | |
| 105 | #define O_NONBLOCK 0x0008 /* Non-blocking open or non-blocking I/O. */ |
| 106 | #ifdef __USE_MISC |
| 107 | # define O_NDELAY O_NONBLOCK /* Deprecated. */ |
| 108 | #endif |
| 109 | |
| 110 | |
| 111 | #ifdef __USE_GNU |
| 112 | /* Mask of bits which are understood by io servers. */ |
| 113 | # define O_HURD (0xffff | O_EXLOCK | O_SHLOCK) |
| 114 | #endif |
| 115 | |
| 116 | |
| 117 | /* Open-time action flags. These are understood by `hurd_file_name_lookup' |
| 118 | and consequently by `open' and `file_name_lookup'. They are not preserved |
| 119 | once the file has been opened. */ |
| 120 | |
| 121 | #define O_TRUNC 0x00010000 /* Truncate file to zero length. */ |
| 122 | #ifdef __USE_XOPEN2K8 |
| 123 | # define O_CLOEXEC 0x00400000 /* Set FD_CLOEXEC. */ |
| 124 | #endif |
| 125 | |
| 126 | #ifdef __USE_GNU |
| 127 | # define O_TMPFILE 0x00800000 /* Make a new unnamed file. */ |
| 128 | #endif |
| 129 | |
| 130 | |
| 131 | /* Controlling terminal flags. These are understood only by `open', |
| 132 | and are not preserved once the file has been opened. */ |
| 133 | |
| 134 | #ifdef __USE_GNU |
| 135 | # define O_IGNORE_CTTY 0x00080000 /* Don't do any ctty magic at all. */ |
| 136 | #endif |
| 137 | /* `open' never assigns a controlling terminal in GNU. */ |
| 138 | #define O_NOCTTY 0 /* Don't assign a controlling terminal. */ |
| 139 | |
| 140 | |
| 141 | #ifdef __USE_MISC |
| 142 | /* Flags for TIOCFLUSH. */ |
| 143 | # define FREAD O_RDONLY |
| 144 | # define FWRITE O_WRONLY |
| 145 | |
| 146 | /* Traditional BSD names the O_* bits. */ |
| 147 | # define FASYNC O_ASYNC |
| 148 | # define FCREAT O_CREAT |
| 149 | # define FEXCL O_EXCL |
| 150 | # define FTRUNC O_TRUNC |
| 151 | # define FNOCTTY O_NOCTTY |
| 152 | # define FFSYNC O_FSYNC |
| 153 | # define FSYNC O_SYNC |
| 154 | # define FAPPEND O_APPEND |
| 155 | # define FNONBLOCK O_NONBLOCK |
| 156 | # define FNDELAY O_NDELAY |
| 157 | #endif |
| 158 | |
| 159 | |
| 160 | /* Values for the second argument to `fcntl'. */ |
| 161 | #define F_DUPFD 0 /* Duplicate file descriptor. */ |
| 162 | #define F_GETFD 1 /* Get file descriptor flags. */ |
| 163 | #define F_SETFD 2 /* Set file descriptor flags. */ |
| 164 | #define F_GETFL 3 /* Get file status flags. */ |
| 165 | #define F_SETFL 4 /* Set file status flags. */ |
| 166 | #if defined __USE_UNIX98 || defined __USE_XOPEN2K8 |
| 167 | # define F_GETOWN 5 /* Get owner (receiver of SIGIO). */ |
| 168 | # define F_SETOWN 6 /* Set owner (receiver of SIGIO). */ |
| 169 | #endif |
| 170 | #ifdef __USE_FILE_OFFSET64 |
| 171 | # define F_GETLK F_GETLK64 |
| 172 | # define F_SETLK F_SETLK64 |
| 173 | # define F_SETLKW F_SETLKW64 |
| 174 | #else |
| 175 | # define F_GETLK 7 /* Get record locking info. */ |
| 176 | # define F_SETLK 8 /* Set record locking info (non-blocking). */ |
| 177 | # define F_SETLKW 9 /* Set record locking info (blocking). */ |
| 178 | #endif |
| 179 | #define F_GETLK64 10 /* Get record locking info. */ |
| 180 | #define F_SETLK64 11 /* Set record locking info (non-blocking). */ |
| 181 | #define F_SETLKW64 12 /* Set record locking info (blocking). */ |
| 182 | |
| 183 | #ifdef __USE_XOPEN2K8 |
| 184 | # define F_DUPFD_CLOEXEC 1030 /* Duplicate, set FD_CLOEXEC on new one. */ |
| 185 | #endif |
| 186 | |
| 187 | |
| 188 | /* File descriptor flags used with F_GETFD and F_SETFD. */ |
| 189 | #define FD_CLOEXEC 1 /* Close on exec. */ |
| 190 | |
| 191 | |
| 192 | #include <bits/types.h> |
| 193 | #include <bits/types/struct_flock.h> |
| 194 | |
| 195 | /* Values for the `l_type' field of a `struct flock'. */ |
| 196 | #define F_RDLCK 1 /* Read lock. */ |
| 197 | #define F_WRLCK 2 /* Write lock. */ |
| 198 | #define F_UNLCK 3 /* Remove lock. */ |
| 199 | |
| 200 | /* Advise to `posix_fadvise'. */ |
| 201 | #ifdef __USE_XOPEN2K |
| 202 | # define POSIX_FADV_NORMAL 0 /* No further special treatment. */ |
| 203 | # define POSIX_FADV_RANDOM 1 /* Expect random page references. */ |
| 204 | # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */ |
| 205 | # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */ |
| 206 | # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */ |
| 207 | # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */ |
| 208 | #endif |
| 209 |
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