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| 1 | /* O_*, F_*, FD_* bit values. 4.4BSD/Generic version. |
|---|---|
| 2 | Copyright (C) 1991-2024 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 | |
| 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. */ |
| 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 | #if defined __USE_POSIX199309 || defined __USE_UNIX98 |
| 48 | # define O_DSYNC 0x00010000 /* Synchronize data. */ |
| 49 | # define O_RSYNC 0x00020000 /* Synchronize read operations. */ |
| 50 | #endif |
| 51 | |
| 52 | /* All opens support large file sizes, so there is no flag bit for this. */ |
| 53 | #ifdef __USE_LARGEFILE64 |
| 54 | # define O_LARGEFILE 0 |
| 55 | #endif |
| 56 | |
| 57 | /* File status flags for `open' and `fcntl'. */ |
| 58 | #define O_APPEND 0x0008 /* Writes append to the file. */ |
| 59 | #define O_NONBLOCK 0x0004 /* Non-blocking I/O. */ |
| 60 | |
| 61 | #ifdef __USE_MISC |
| 62 | # define O_NDELAY O_NONBLOCK |
| 63 | #endif |
| 64 | |
| 65 | #ifdef __USE_MISC |
| 66 | /* Flags for TIOCFLUSH. */ |
| 67 | # define FREAD 1 |
| 68 | # define FWRITE 2 |
| 69 | |
| 70 | /* Traditional BSD names the O_* bits. */ |
| 71 | # define FASYNC O_ASYNC |
| 72 | # define FFSYNC O_FSYNC |
| 73 | # define FSYNC O_SYNC |
| 74 | # define FAPPEND O_APPEND |
| 75 | # define FNDELAY O_NDELAY |
| 76 | #endif |
| 77 | |
| 78 | /* Mask for file access modes. This is system-dependent in case |
| 79 | some system ever wants to define some other flavor of access. */ |
| 80 | #define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR) |
| 81 | |
| 82 | /* Values for the second argument to `fcntl'. */ |
| 83 | #define F_DUPFD 0 /* Duplicate file descriptor. */ |
| 84 | #define F_GETFD 1 /* Get file descriptor flags. */ |
| 85 | #define F_SETFD 2 /* Set file descriptor flags. */ |
| 86 | #define F_GETFL 3 /* Get file status flags. */ |
| 87 | #define F_SETFL 4 /* Set file status flags. */ |
| 88 | #if defined __USE_UNIX98 || defined __USE_XOPEN2K8 |
| 89 | #define F_GETOWN 5 /* Get owner (receiver of SIGIO). */ |
| 90 | #define F_SETOWN 6 /* Set owner (receiver of SIGIO). */ |
| 91 | #endif |
| 92 | #define F_GETLK 7 /* Get record locking info. */ |
| 93 | #define F_SETLK 8 /* Set record locking info (non-blocking). */ |
| 94 | #define F_SETLKW 9 /* Set record locking info (blocking). */ |
| 95 | /* Not necessary, we always have 64-bit offsets. */ |
| 96 | #define F_GETLK64 F_GETLK /* Get record locking info. */ |
| 97 | #define F_SETLK64 F_SETLK /* Set record locking info (non-blocking). */ |
| 98 | #define F_SETLKW64 F_SETLKW/* Set record locking info (blocking). */ |
| 99 | #ifdef __USE_XOPEN2K8 |
| 100 | # define F_DUPFD_CLOEXEC 12 /* Duplicate file descriptor with |
| 101 | close-on-exit set. */ |
| 102 | #endif |
| 103 | |
| 104 | /* File descriptor flags used with F_GETFD and F_SETFD. */ |
| 105 | #define FD_CLOEXEC 1 /* Close on exec. */ |
| 106 | |
| 107 | |
| 108 | #include <bits/types.h> |
| 109 | |
| 110 | /* The structure describing an advisory lock. This is the type of the third |
| 111 | argument to `fcntl' for the F_GETLK, F_SETLK, and F_SETLKW requests. */ |
| 112 | struct flock |
| 113 | { |
| 114 | __off_t l_start; /* Offset where the lock begins. */ |
| 115 | __off_t l_len; /* Size of the locked area; zero means until EOF. */ |
| 116 | __pid_t l_pid; /* Process holding the lock. */ |
| 117 | short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ |
| 118 | short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ |
| 119 | }; |
| 120 | |
| 121 | #ifdef __USE_LARGEFILE64 |
| 122 | /* Note this matches struct flock exactly. */ |
| 123 | struct flock64 |
| 124 | { |
| 125 | __off_t l_start; /* Offset where the lock begins. */ |
| 126 | __off_t l_len; /* Size of the locked area; zero means until EOF. */ |
| 127 | __pid_t l_pid; /* Process holding the lock. */ |
| 128 | short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ |
| 129 | short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ |
| 130 | }; |
| 131 | #endif |
| 132 | |
| 133 | /* Values for the `l_type' field of a `struct flock'. */ |
| 134 | #define F_RDLCK 1 /* Read lock. */ |
| 135 | #define F_WRLCK 2 /* Write lock. */ |
| 136 | #define F_UNLCK 3 /* Remove lock. */ |
| 137 | |
| 138 | /* Advise to `posix_fadvise'. */ |
| 139 | #ifdef __USE_XOPEN2K |
| 140 | # define POSIX_FADV_NORMAL 0 /* No further special treatment. */ |
| 141 | # define POSIX_FADV_RANDOM 1 /* Expect random page references. */ |
| 142 | # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */ |
| 143 | # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */ |
| 144 | # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */ |
| 145 | # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */ |
| 146 | #endif |
| 147 |
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