| /* O_*, F_*, FD_* bit values for Linux/x86-64. |
| Copyright (C) 2001,2002,2004,2006,2007,2009,2010,2011 |
| 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #ifndef _FCNTL_H |
| # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead." |
| #endif |
| |
| #include <sys/types.h> |
| #include <bits/wordsize.h> |
| #ifdef __USE_GNU |
| # include <bits/uio.h> |
| #endif |
| |
| |
| /* open/fcntl - O_SYNC is only implemented on blocks devices and on files |
| located on a few file systems. */ |
| #define O_ACCMODE 0003 |
| #define O_RDONLY 00 |
| #define O_WRONLY 01 |
| #define O_RDWR 02 |
| #define O_CREAT 0100 /* not fcntl */ |
| #define O_EXCL 0200 /* not fcntl */ |
| #define O_NOCTTY 0400 /* not fcntl */ |
| #define O_TRUNC 01000 /* not fcntl */ |
| #define O_APPEND 02000 |
| #define O_NONBLOCK 04000 |
| #define O_NDELAY O_NONBLOCK |
| #define O_SYNC 04010000 |
| #define O_FSYNC O_SYNC |
| #define O_ASYNC 020000 |
| |
| #ifdef __USE_XOPEN2K8 |
| # define O_DIRECTORY 0200000 /* Must be a directory. */ |
| # define O_NOFOLLOW 0400000 /* Do not follow links. */ |
| # define O_CLOEXEC 02000000 /* Set close_on_exec. */ |
| #endif |
| #ifdef __USE_GNU |
| # define O_DIRECT 040000 /* Direct disk access. */ |
| # define O_NOATIME 01000000 /* Do not set atime. */ |
| # define O_PATH 010000000 /* Resolve pathname but do not open file. */ |
| #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 010000 /* Synchronize data. */ |
| # define O_RSYNC O_SYNC /* Synchronize read operations. */ |
| #endif |
| |
| #ifdef __USE_LARGEFILE64 |
| # if __WORDSIZE == 64 |
| # define O_LARGEFILE 0 |
| # else |
| # define O_LARGEFILE 0100000 |
| # endif |
| #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. */ |
| #if __WORDSIZE == 64 |
| # define F_GETLK 5 /* Get record locking info. */ |
| # define F_SETLK 6 /* Set record locking info (non-blocking). */ |
| # define F_SETLKW 7 /* Set record locking info (blocking). */ |
| /* Not necessary, we always have 64-bit offsets. */ |
| # define F_GETLK64 5 /* Get record locking info. */ |
| # define F_SETLK64 6 /* Set record locking info (non-blocking). */ |
| # define F_SETLKW64 7 /* Set record locking info (blocking). */ |
| #else |
| # ifndef __USE_FILE_OFFSET64 |
| # define F_GETLK 5 /* Get record locking info. */ |
| # define F_SETLK 6 /* Set record locking info (non-blocking). */ |
| # define F_SETLKW 7 /* Set record locking info (blocking). */ |
| # else |
| # define F_GETLK F_GETLK64 /* Get record locking info. */ |
| # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/ |
| # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */ |
| # endif |
| # define F_GETLK64 12 /* Get record locking info. */ |
| # define F_SETLK64 13 /* Set record locking info (non-blocking). */ |
| # define F_SETLKW64 14 /* Set record locking info (blocking). */ |
| #endif |
| |
| #if defined __USE_BSD || defined __USE_UNIX98 || defined __USE_XOPEN2K8 |
| # define F_SETOWN 8 /* Get owner (process receiving SIGIO). */ |
| # define F_GETOWN 9 /* Set owner (process receiving 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. */ |
| # define F_SETOWN_EX 15 /* Get owner (thread receiving SIGIO). */ |
| # define F_GETOWN_EX 16 /* Set owner (thread receiving SIGIO). */ |
| #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_SETPIPE_SZ 1031 /* Set pipe page size array. */ |
| # define F_GETPIPE_SZ 1032 /* Set pipe page size array. */ |
| #endif |
| #ifdef __USE_XOPEN2K8 |
| # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with |
| close-on-exit set. */ |
| #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 0 /* Read lock. */ |
| #define F_WRLCK 1 /* Write lock. */ |
| #define F_UNLCK 2 /* Remove lock. */ |
| |
| /* For old implementation of bsd flock(). */ |
| #define F_EXLCK 4 /* or 3 */ |
| #define F_SHLCK 8 /* or 4 */ |
| |
| #ifdef __USE_BSD |
| /* Operations for bsd flock(), also used by the kernel implementation. */ |
| # 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 |
| |
| 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'). */ |
| #ifndef __USE_FILE_OFFSET64 |
| __off_t l_start; /* Offset where the lock begins. */ |
| __off_t l_len; /* Size of the locked area; zero means until EOF. */ |
| #else |
| __off64_t l_start; /* Offset where the lock begins. */ |
| __off64_t l_len; /* Size of the locked area; zero means until EOF. */ |
| #endif |
| __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 |
| |
| #ifdef __USE_GNU |
| /* Owner types. */ |
| enum __pid_type |
| { |
| F_OWNER_TID = 0, /* Kernel thread. */ |
| F_OWNER_PID, /* Process. */ |
| F_OWNER_PGRP, /* Process group. */ |
| F_OWNER_GID = F_OWNER_PGRP /* Alternative, obsolete name. */ |
| }; |
| |
| /* Structure to use with F_GETOWN_EX and F_SETOWN_EX. */ |
| struct f_owner_ex |
| { |
| enum __pid_type type; /* Owner type of ID. */ |
| __pid_t pid; /* ID of owner. */ |
| }; |
| #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 |
| |
| |
| #ifdef __USE_GNU |
| /* 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. */ |
| |
| |
| /* File handle structure. */ |
| struct file_handle |
| { |
| unsigned int handle_bytes; |
| int handle_type; |
| /* File identifier. */ |
| unsigned char f_handle[0]; |
| }; |
| |
| /* Maximum handle size (for now). */ |
| # define MAX_HANDLE_SZ 128 |
| #endif |
| |
| /* Values for `*at' functions. */ |
| #ifdef __USE_ATFILE |
| # define AT_FDCWD -100 /* Special value used to indicate |
| the *at functions should use the |
| current working directory. */ |
| # define AT_SYMLINK_NOFOLLOW 0x100 /* Do not follow symbolic links. */ |
| # define AT_REMOVEDIR 0x200 /* Remove directory instead of |
| unlinking file. */ |
| # define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic links. */ |
| # define AT_NO_AUTOMOUNT 0x800 /* Suppress terminal automount |
| traversal. */ |
| # define AT_EACCESS 0x200 /* Test access permitted for |
| effective IDs, not real IDs. */ |
| #endif |
| |
| __BEGIN_DECLS |
| |
| #ifdef __USE_GNU |
| |
| /* Provide kernel hint to read ahead. */ |
| extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count) |
| __THROW; |
| |
| |
| /* Selective file content synch'ing. |
| |
| This function is a possible cancellation point and therefore not |
| marked with __THROW. */ |
| extern int sync_file_range (int __fd, __off64_t __offset, __off64_t __count, |
| unsigned int __flags); |
| |
| |
| /* Splice address range into a pipe. |
| |
| This function is a possible cancellation point and therefore not |
| marked with __THROW. */ |
| extern ssize_t vmsplice (int __fdout, const struct iovec *__iov, |
| size_t __count, unsigned int __flags); |
| |
| /* Splice two files together. |
| |
| This function is a possible cancellation point and therefore not |
| marked with __THROW. */ |
| 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. |
| |
| This function is a possible cancellation point and therefore not |
| marked with __THROW. */ |
| extern ssize_t tee (int __fdin, int __fdout, size_t __len, |
| unsigned int __flags); |
| |
| /* Reserve storage for the data of the file associated with FD. |
| |
| This function is a possible cancellation point and therefore not |
| marked with __THROW. */ |
| # ifndef __USE_FILE_OFFSET64 |
| extern int fallocate (int __fd, int __mode, __off_t __offset, __off_t __len); |
| # else |
| # ifdef __REDIRECT |
| extern int __REDIRECT (fallocate, (int __fd, int __mode, __off64_t __offset, |
| __off64_t __len), |
| fallocate64); |
| # else |
| # define fallocate fallocate64 |
| # endif |
| # endif |
| # ifdef __USE_LARGEFILE64 |
| extern int fallocate64 (int __fd, int __mode, __off64_t __offset, |
| __off64_t __len); |
| # endif |
| |
| |
| /* Map file name to file handle. */ |
| extern int name_to_handle_at (int __dfd, const char *__name, |
| struct file_handle *__handle, int *__mnt_id, |
| int __flags) __THROW; |
| |
| /* Open file using the file handle. |
| |
| This function is a possible cancellation point and therefore not |
| marked with __THROW. */ |
| extern int open_by_handle_at (int __mountdirfd, struct file_handle *__handle, |
| int __flags); |
| |
| #endif /* use GNU */ |
| |
| __END_DECLS |
