/* O_*, F_*, FD_* bit values for Linux. Copyright (C) 1995-2000,2004,2005,2006,2007 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> #ifdef __USE_GNU # include <bits/uio.h> #endif /* open/fcntl - O_SYNC is only implemented on blocks devices and on files located on an ext2 file system */ #define O_ACCMODE 0003 #define O_RDONLY 00 #define O_WRONLY 01 #define O_RDWR 02 #define O_CREAT 01000 /* not fcntl */ #define O_TRUNC 02000 /* not fcntl */ #define O_EXCL 04000 /* not fcntl */ #define O_NOCTTY 010000 /* not fcntl */ #define O_NONBLOCK 00004 #define O_APPEND 00010 #define O_NDELAY O_NONBLOCK #define O_SYNC 040000 #define O_FSYNC O_SYNC #define O_ASYNC 020000 /* fcntl, for BSD compatibility */ #ifdef __USE_GNU # define O_DIRECTORY 0100000 /* Must be a directory. */ # define O_NOFOLLOW 0200000 /* Do not follow links. */ # define O_DIRECT 02000000 /* Direct disk access. */ # define O_NOATIME 04000000 /* Do not set atime. */ # define O_CLOEXEC 010000000 /* Set close_on_exec. */ #endif #ifdef __USE_LARGEFILE64 /* Not necessary, files are always with 64bit off_t. */ # define O_LARGEFILE 0 #endif /* For now Linux has synchronisity options for data and read operations. We define the symbols here but let them do the same as O_SYNC since this is a superset. */ #if defined __USE_POSIX199309 || defined __USE_UNIX98 # define O_DSYNC O_SYNC /* Synchronize data. */ # define O_RSYNC O_SYNC /* Synchronize read operations. */ #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. */ #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). */ #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). */ #if defined __USE_BSD || defined __USE_UNIX98 # define F_SETOWN 5 /* Get owner of socket (receiver of SIGIO). */ # define F_GETOWN 6 /* Set owner of socket (receiver of SIGIO). */ #endif #ifdef __USE_GNU # define F_SETSIG 10 /* Set number of signal to be sent. */ # define F_GETSIG 11 /* Get number of signal to be sent. */ #endif #ifdef __USE_GNU # define F_SETLEASE 1024 /* Set a lease. */ # define F_GETLEASE 1025 /* Enquire what lease is active. */ # define F_NOTIFY 1026 /* Request notfications on a directory. */ # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with close-on-exit set on new fd. */ # define F_SETPIPE_SZ 1031 /* Set pipe page size array. */ # define F_GETPIPE_SZ 1032 /* Get pipe page size array. */ #endif /* for F_[GET|SET]FD */ #define FD_CLOEXEC 1 /* actually anything with low bit set goes */ /* For posix fcntl() and `l_type' field of a `struct flock' for lockf() */ #define F_RDLCK 1 /* Read lock. */ #define F_WRLCK 2 /* Write lock. */ #define F_UNLCK 8 /* Remove lock. */ /* for old implementation of bsd flock () */ #define F_EXLCK 16 /* or 3 */ #define F_SHLCK 32 /* or 4 */ /* Operations for bsd flock(), also used by the kernel implementation */ #ifdef __USE_BSD # define LOCK_SH 1 /* shared lock */ # define LOCK_EX 2 /* exclusive lock */ # define LOCK_NB 4 /* or'd with one of the above to prevent blocking */ # define LOCK_UN 8 /* remove lock */ #endif #ifdef __USE_GNU # define LOCK_MAND 32 /* This is a mandatory flock: */ # define LOCK_READ 64 /* ... which allows concurrent read operations. */ # define LOCK_WRITE 128 /* ... which allows concurrent write operations. */ # define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */ #endif #ifdef __USE_GNU /* Types of directory notifications that may be requested with F_NOTIFY. */ # define DN_ACCESS 0x00000001 /* File accessed. */ # define DN_MODIFY 0x00000002 /* File modified. */ # define DN_CREATE 0x00000004 /* File created. */ # define DN_DELETE 0x00000008 /* File removed. */ # define DN_RENAME 0x00000010 /* File renamed. */ # define DN_ATTRIB 0x00000020 /* File changed attibutes. */ # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */ #endif /* We don't need to support __USE_FILE_OFFSET64. */ struct flock { 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'). */ __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. */ }; #ifdef __USE_LARGEFILE64 struct flock64 { 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'). */ __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 /* Define some more compatibility macros to be backward compatible with BSD systems which did not managed to hide these kernel macros. */ #ifdef __USE_BSD # define FAPPEND O_APPEND # define FFSYNC O_FSYNC # define FASYNC O_ASYNC # define FNONBLOCK O_NONBLOCK # define FNDELAY O_NDELAY #endif /* Use BSD. */ /* 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 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ /* Flags for SYNC_FILE_RANGE. */ # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages in the range before performing the write. */ # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those dirty pages in the range which are not presently under writeback. */ # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in the range after performing the write. */ /* Flags for SPLICE and VMSPLICE. */ # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */ # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing (but we may still block on the fd we splice from/to). */ # define SPLICE_F_MORE 4 /* Expect more data. */ # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */ #endif __BEGIN_DECLS #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ /* Provide kernel hint to read ahead. */ extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count) __THROW; /* Selective file content synch'ing. */ extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to, unsigned int __flags); /* Splice address range into a pipe. */ extern ssize_t vmsplice (int __fdout, const struct iovec *__iov, size_t __count, unsigned int __flags); /* Splice two files together. */ extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout, __off64_t *__offout, size_t __len, unsigned int __flags); /* In-kernel implementation of tee for pipe buffers. */ extern ssize_t tee (int __fdin, int __fdout, size_t __len, unsigned int __flags); #endif __END_DECLS