| /* O_*, F_*, FD_* bit values. 4.4BSD/Generic version. |
| Copyright (C) 1991-2018 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 |
| |
| |
| /* File access modes for `open' and `fcntl'. */ |
| #define O_RDONLY 0 /* Open read-only. */ |
| #define O_WRONLY 1 /* Open write-only. */ |
| #define O_RDWR 2 /* Open read/write. */ |
| |
| |
| /* Bits OR'd into the second argument to open. */ |
| #define O_CREAT 0x0200 /* Create file if it doesn't exist. */ |
| #define O_EXCL 0x0800 /* Fail if file already exists. */ |
| #define O_TRUNC 0x0400 /* Truncate file to zero length. */ |
| #define O_NOCTTY 0x8000 /* Don't assign a controlling terminal. */ |
| #define O_ASYNC 0x0040 /* Send SIGIO to owner when data is ready. */ |
| #define O_FSYNC 0x0080 /* Synchronous writes. */ |
| #define O_SYNC O_FSYNC |
| #ifdef __USE_MISC |
| #define O_SHLOCK 0x0010 /* Open with shared file lock. */ |
| #define O_EXLOCK 0x0020 /* Open with shared exclusive lock. */ |
| #endif |
| #ifdef __USE_XOPEN2K8 |
| # define O_DIRECTORY 0x00200000 /* Must be a directory. */ |
| # define O_NOFOLLOW 0x00000100 /* Do not follow links. */ |
| # define O_CLOEXEC 0x00400000 /* Set close_on_exec. */ |
| #endif |
| #if defined __USE_POSIX199309 || defined __USE_UNIX98 |
| # define O_DSYNC 0x00010000 /* Synchronize data. */ |
| # define O_RSYNC 0x00020000 /* Synchronize read operations. */ |
| #endif |
| |
| /* All opens support large file sizes, so there is no flag bit for this. */ |
| #ifdef __USE_LARGEFILE64 |
| # define O_LARGEFILE 0 |
| #endif |
| |
| /* File status flags for `open' and `fcntl'. */ |
| #define O_APPEND 0x0008 /* Writes append to the file. */ |
| #define O_NONBLOCK 0x0004 /* Non-blocking I/O. */ |
| |
| #ifdef __USE_MISC |
| # define O_NDELAY O_NONBLOCK |
| #endif |
| |
| #ifdef __USE_MISC |
| /* Flags for TIOCFLUSH. */ |
| # define FREAD 1 |
| # define FWRITE 2 |
| |
| /* Traditional BSD names the O_* bits. */ |
| # define FASYNC O_ASYNC |
| # define FFSYNC O_FSYNC |
| # define FSYNC O_SYNC |
| # define FAPPEND O_APPEND |
| # define FNDELAY O_NDELAY |
| #endif |
| |
| /* Mask for file access modes. This is system-dependent in case |
| some system ever wants to define some other flavor of access. */ |
| #define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR) |
| |
| /* 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_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). */ |
| /* Not necessary, we always have 64-bit offsets. */ |
| #define F_GETLK64 F_GETLK /* Get record locking info. */ |
| #define F_SETLK64 F_SETLK /* Set record locking info (non-blocking). */ |
| #define F_SETLKW64 F_SETLKW/* Set record locking info (blocking). */ |
| #ifdef __USE_XOPEN2K8 |
| # define F_DUPFD_CLOEXEC 12 /* Duplicate file descriptor with |
| close-on-exit set. */ |
| #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 |
| { |
| __off_t l_start; /* Offset where the lock begins. */ |
| __off_t l_len; /* Size of the locked area; zero means until EOF. */ |
| __pid_t l_pid; /* Process holding the lock. */ |
| short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ |
| short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ |
| }; |
| |
| #ifdef __USE_LARGEFILE64 |
| /* Note this matches struct flock exactly. */ |
| struct flock64 |
| { |
| __off_t l_start; /* Offset where the lock begins. */ |
| __off_t l_len; /* Size of the locked area; zero means until EOF. */ |
| __pid_t l_pid; /* Process holding the lock. */ |
| short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ |
| short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ |
| }; |
| #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 |
