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Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/asmc/@/sys/fcntl.h |
/*- * Copyright (c) 1983, 1990, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)fcntl.h 8.3 (Berkeley) 1/21/94 * $FreeBSD: release/9.1.0/sys/sys/fcntl.h 229723 2012-01-06 19:29:16Z jhb $ */ #ifndef _SYS_FCNTL_H_ #define _SYS_FCNTL_H_ /* * This file includes the definitions for open and fcntl * described by POSIX for <fcntl.h>; it also includes * related kernel definitions. */ #include <sys/cdefs.h> #include <sys/_types.h> #ifndef _MODE_T_DECLARED typedef __mode_t mode_t; #define _MODE_T_DECLARED #endif #ifndef _OFF_T_DECLARED typedef __off_t off_t; #define _OFF_T_DECLARED #endif #ifndef _PID_T_DECLARED typedef __pid_t pid_t; #define _PID_T_DECLARED #endif /* * File status flags: these are used by open(2), fcntl(2). * They are also used (indirectly) in the kernel file structure f_flags, * which is a superset of the open/fcntl flags. Open flags and f_flags * are inter-convertible using OFLAGS(fflags) and FFLAGS(oflags). * Open/fcntl flags begin with O_; kernel-internal flags begin with F. */ /* open-only flags */ #define O_RDONLY 0x0000 /* open for reading only */ #define O_WRONLY 0x0001 /* open for writing only */ #define O_RDWR 0x0002 /* open for reading and writing */ #define O_ACCMODE 0x0003 /* mask for above modes */ /* * Kernel encoding of open mode; separate read and write bits that are * independently testable: 1 greater than the above. * * XXX * FREAD and FWRITE are excluded from the #ifdef _KERNEL so that TIOCFLUSH, * which was documented to use FREAD/FWRITE, continues to work. */ #if __BSD_VISIBLE #define FREAD 0x0001 #define FWRITE 0x0002 #endif #define O_NONBLOCK 0x0004 /* no delay */ #define O_APPEND 0x0008 /* set append mode */ #if __BSD_VISIBLE #define O_SHLOCK 0x0010 /* open with shared file lock */ #define O_EXLOCK 0x0020 /* open with exclusive file lock */ #define O_ASYNC 0x0040 /* signal pgrp when data ready */ #define O_FSYNC 0x0080 /* synchronous writes */ #endif #define O_SYNC 0x0080 /* POSIX synonym for O_FSYNC */ #if __BSD_VISIBLE #define O_NOFOLLOW 0x0100 /* don't follow symlinks */ #endif #define O_CREAT 0x0200 /* create if nonexistent */ #define O_TRUNC 0x0400 /* truncate to zero length */ #define O_EXCL 0x0800 /* error if already exists */ #ifdef _KERNEL #define FHASLOCK 0x4000 /* descriptor holds advisory lock */ #endif /* Defined by POSIX 1003.1; BSD default, but must be distinct from O_RDONLY. */ #define O_NOCTTY 0x8000 /* don't assign controlling terminal */ #if __BSD_VISIBLE /* Attempt to bypass buffer cache */ #define O_DIRECT 0x00010000 #endif /* Defined by POSIX Extended API Set Part 2 */ #if __BSD_VISIBLE #define O_DIRECTORY 0x00020000 /* Fail if not directory */ #define O_EXEC 0x00040000 /* Open for execute only */ #endif #ifdef _KERNEL #define FEXEC O_EXEC #endif #if __POSIX_VISIBLE >= 200809 /* Defined by POSIX 1003.1-2008; BSD default, but reserve for future use. */ #define O_TTY_INIT 0x00080000 /* Restore default termios attributes */ #define O_CLOEXEC 0x00100000 #endif /* * XXX missing O_DSYNC, O_RSYNC. */ #ifdef _KERNEL /* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE */ #define FFLAGS(oflags) ((oflags) + 1) #define OFLAGS(fflags) ((fflags) - 1) /* bits to save after open */ #define FMASK (FREAD|FWRITE|FAPPEND|FASYNC|FFSYNC|FNONBLOCK|O_DIRECT|FEXEC) /* bits settable by fcntl(F_SETFL, ...) */ #define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK|FRDAHEAD|O_DIRECT) #if defined(COMPAT_FREEBSD7) || defined(COMPAT_FREEBSD6) || \ defined(COMPAT_FREEBSD5) || defined(COMPAT_FREEBSD4) /* * Set by shm_open(3) in older libc's to get automatic MAP_ASYNC * behavior for POSIX shared memory objects (which are otherwise * implemented as plain files). */ #define FPOSIXSHM O_NOFOLLOW #undef FCNTLFLAGS #define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK|FPOSIXSHM|FRDAHEAD| \ O_DIRECT) #endif #endif /* * The O_* flags used to have only F* names, which were used in the kernel * and by fcntl. We retain the F* names for the kernel f_flag field * and for backward compatibility for fcntl. These flags are deprecated. */ #if __BSD_VISIBLE #define FAPPEND O_APPEND /* kernel/compat */ #define FASYNC O_ASYNC /* kernel/compat */ #define FFSYNC O_FSYNC /* kernel */ #define FNONBLOCK O_NONBLOCK /* kernel */ #define FNDELAY O_NONBLOCK /* compat */ #define O_NDELAY O_NONBLOCK /* compat */ #endif /* * We are out of bits in f_flag (which is a short). However, * the flag bits not set in FMASK are only meaningful in the * initial open syscall. Those bits can thus be given a * different meaning for fcntl(2). */ #if __BSD_VISIBLE /* Read ahead */ #define FRDAHEAD O_CREAT #endif /* Defined by POSIX Extended API Set Part 2 */ #if __BSD_VISIBLE /* * Magic value that specify the use of the current working directory * to determine the target of relative file paths in the openat() and * similar syscalls. */ #define AT_FDCWD -100 /* * Miscellaneous flags for the *at() syscalls. */ #define AT_EACCESS 0x100 /* Check access using effective user and group ID */ #define AT_SYMLINK_NOFOLLOW 0x200 /* Do not follow symbolic links */ #define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic link */ #define AT_REMOVEDIR 0x800 /* Remove directory instead of file */ #endif /* * Constants used for fcntl(2) */ /* command values */ #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 __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112 #define F_GETOWN 5 /* get SIGIO/SIGURG proc/pgrp */ #define F_SETOWN 6 /* set SIGIO/SIGURG proc/pgrp */ #endif #define F_OGETLK 7 /* get record locking information */ #define F_OSETLK 8 /* set record locking information */ #define F_OSETLKW 9 /* F_SETLK; wait if blocked */ #define F_DUP2FD 10 /* duplicate file descriptor to arg */ #define F_GETLK 11 /* get record locking information */ #define F_SETLK 12 /* set record locking information */ #define F_SETLKW 13 /* F_SETLK; wait if blocked */ #define F_SETLK_REMOTE 14 /* debugging support for remote locks */ #define F_READAHEAD 15 /* read ahead */ #define F_RDAHEAD 16 /* Darwin compatible read ahead */ /* file descriptor flags (F_GETFD, F_SETFD) */ #define FD_CLOEXEC 1 /* close-on-exec flag */ /* record locking flags (F_GETLK, F_SETLK, F_SETLKW) */ #define F_RDLCK 1 /* shared or read lock */ #define F_UNLCK 2 /* unlock */ #define F_WRLCK 3 /* exclusive or write lock */ #define F_UNLCKSYS 4 /* purge locks for a given system ID */ #define F_CANCEL 5 /* cancel an async lock request */ #ifdef _KERNEL #define F_WAIT 0x010 /* Wait until lock is granted */ #define F_FLOCK 0x020 /* Use flock(2) semantics for lock */ #define F_POSIX 0x040 /* Use POSIX semantics for lock */ #define F_REMOTE 0x080 /* Lock owner is remote NFS client */ #define F_NOINTR 0x100 /* Ignore signals when waiting */ #endif /* * Advisory file segment locking data type - * information passed to system by user */ struct flock { off_t l_start; /* starting offset */ off_t l_len; /* len = 0 means until end of file */ pid_t l_pid; /* lock owner */ short l_type; /* lock type: read/write, etc. */ short l_whence; /* type of l_start */ int l_sysid; /* remote system id or zero for local */ }; /* * Old advisory file segment locking data type, * before adding l_sysid. */ struct oflock { off_t l_start; /* starting offset */ off_t l_len; /* len = 0 means until end of file */ pid_t l_pid; /* lock owner */ short l_type; /* lock type: read/write, etc. */ short l_whence; /* type of l_start */ }; #if __BSD_VISIBLE /* lock operations for flock(2) */ #define LOCK_SH 0x01 /* shared file lock */ #define LOCK_EX 0x02 /* exclusive file lock */ #define LOCK_NB 0x04 /* don't block when locking */ #define LOCK_UN 0x08 /* unlock file */ #endif #if __POSIX_VISIBLE >= 200112 /* * Advice to posix_fadvise */ #define POSIX_FADV_NORMAL 0 /* no 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 /* dont need these pages */ #define POSIX_FADV_NOREUSE 5 /* access data only once */ #endif #ifndef _KERNEL __BEGIN_DECLS int open(const char *, int, ...); int creat(const char *, mode_t); int fcntl(int, int, ...); #if __BSD_VISIBLE || __POSIX_VISIBLE >= 200809 int openat(int, const char *, int, ...); #endif #if __BSD_VISIBLE || __POSIX_VISIBLE >= 200112 int posix_fadvise(int, off_t, off_t, int); int posix_fallocate(int, off_t, off_t); #endif #if __BSD_VISIBLE int flock(int, int); #endif __END_DECLS #endif #endif /* !_SYS_FCNTL_H_ */