/*- * Copyright (c) 1983, 1990 The Regents of the University of California. * All rights reserved. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 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 5.14 (Berkeley) 7/1/91 */ #ifndef _FCNTL_H_ #define _FCNTL_H_ /* * This file includes the definitions for open and fcntl * described by POSIX for ; it also includes * related kernel definitions. */ #ifndef KERNEL #include #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. */ #define FREAD 0x0001 #define FWRITE 0x0002 #define O_NONBLOCK 0x0004 /* no delay */ #define O_APPEND 0x0100 /* set append mode */ #ifndef _POSIX_SOURCE #define O_SHLOCK 0x0 /* open with shared file lock */ #define O_EXLOCK 0x0 /* open with exclusive file lock */ #define O_ASYNC 0x0040 /* signal pgrp when data ready */ #define O_FSYNC 0x2000 /* synchronous writes */ #endif #define O_CREAT 0x0200 /* create if nonexistant */ #define O_TRUNC 0x0400 /* truncate to zero length */ #define O_EXCL 0x0800 /* error if already exists */ #define O_XLATE 0x1000 /* do translation */ #define FEXTOPEN 0x0010 /* don't close with DOS Close command */ #define FTTYRAW 0x0020 /* tty in RAW mode */ #define FUNLINK 0x0080 /* unlink file when closed */ #define FMARK 0x0 /* mark during gc() */ #define FDEFER 0x0 /* defer for next gc pass */ #define FHASLOCK 0x0 /* descriptor holds advisory lock */ /* defined by POSIX 1003.1; BSD default, so no bit required */ #define O_NOCTTY 0 /* don't assign controlling terminal */ #define FOPEN (-1) /* 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) /* bits settable by fcntl(F_SETFL, ...) */ #define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK|FEXTOPEN) /* * 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_flags field * and for backward compatibility for fcntl. */ #ifndef _POSIX_SOURCE #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 FNBIO O_NONBLOCK /* compat */ #define O_NDELAY O_NONBLOCK /* compat */ #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 */ #ifndef _POSIX_SOURCE #define F_GETOWN 5 /* get SIGIO/SIGURG proc/pgrp */ #define F_SETOWN 6 /* set SIGIO/SIGURG proc/pgrp */ #endif #define F_GETLK 7 /* get record locking information */ #define F_SETLK 8 /* set record locking information */ #define F_SETLKW 9 /* F_SETLK; wait if blocked */ /* 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 */ #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_INTERNALIZE 4242 #define F_EXTERNALIZE 4243 #endif /* * Advisory file segment locking data type - * information passed to system by user */ struct flock { short l_type; /* lock type: read/write, etc. */ short l_whence; /* type of l_start */ off_t l_start; /* starting offset */ off_t l_len; /* len = 0 means until end of file */ pid_t l_pid; /* lock owner */ }; #ifndef _POSIX_SOURCE /* 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 #ifndef KERNEL #include __BEGIN_DECLS int open __P((const char *, int, ...)); int creat __P((const char *, mode_t)); int fcntl __P((int, int, ...)); #ifndef _POSIX_SOURCE int flock __P((int, int)); #endif /* !_POSIX_SOURCE */ __END_DECLS #endif #endif /* !_FCNTL_H_ */