/* $NetBSD: fcntl.h,v 1.17 1999/08/31 12:30:35 bouyer Exp $ */ /*- * 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. * 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 8.3 (Berkeley) 1/21/94 */ #ifndef _SYS_FCNTL_H_ #define _SYS_FCNTL_H_ /* * This file includes the definitions for open and fcntl * described by POSIX for ; it also includes * related kernel definitions. */ #ifndef _KERNEL #include #include #if !defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) #include #endif /* !_POSIX_C_SOURCE */ #endif /* !_KERNEL */ /* * 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 0x00000000 /* open for reading only */ #define O_WRONLY 0x00000001 /* open for writing only */ #define O_RDWR 0x00000002 /* open for reading and writing */ #define O_ACCMODE 0x00000003 /* 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 !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) #define FREAD 0x00000001 #define FWRITE 0x00000002 #endif #define O_NONBLOCK 0x00000004 /* no delay */ #define O_APPEND 0x00000008 /* set append mode */ #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) #define O_SHLOCK 0x00000010 /* open with shared file lock */ #define O_EXLOCK 0x00000020 /* open with exclusive file lock */ #define O_ASYNC 0x00000040 /* signal pgrp when data ready */ #endif #if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)) || \ (_POSIX_C_SOURCE - 0) >= 199309L || \ (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ (_XOPEN_SOURCE - 0) >= 500 #define O_SYNC 0x00000080 /* synchronous writes */ #endif #define O_CREAT 0x00000200 /* create if nonexistant */ #define O_TRUNC 0x00000400 /* truncate to zero length */ #define O_EXCL 0x00000800 /* error if already exists */ #if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE)) || \ (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 #define O_DSYNC 0x00010000 /* write: I/O data completion */ #define O_RSYNC 0x00020000 /* read: I/O completion as for write */ #endif #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) #define O_ALT_IO 0x00040000 /* use alternate i/o semantics */ #endif /* defined by POSIX 1003.1; BSD default, but required to be bitwise distinct */ #define O_NOCTTY 0x008000 /* don't assign controlling terminal */ #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) /* all bits settable during open(2) */ #define O_MASK (O_ACCMODE|O_NONBLOCK|O_APPEND|O_SHLOCK|O_EXLOCK|\ O_ASYNC|O_SYNC|O_CREAT|O_TRUNC|O_EXCL|O_DSYNC|\ O_RSYNC|O_NOCTTY|O_ALT_IO) #define FMARK 0x00001000 /* mark during gc() */ #define FDEFER 0x00002000 /* defer for next gc pass */ #define FHASLOCK 0x00004000 /* descriptor holds advisory lock */ /* * Note: The below is not a flag that can be used in the struct file. * It's an option that can be passed to vn_open to make sure it doesn't * follow a symlink on the last lookup */ #define FNOSYMLINK 0x00080000 /* Don't follow symlink for last component */ /* bits to save after open(2) */ #define FMASK (FREAD|FWRITE|FAPPEND|FASYNC|FFSYNC|FNONBLOCK|FDSYNC|\ FRSYNC|FALTIO) /* bits settable by fcntl(F_SETFL, ...) */ #define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK|FDSYNC|FRSYNC|FALTIO) #endif /* _KERNEL */ /* * 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. */ #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) #define FAPPEND O_APPEND /* kernel/compat */ #define FASYNC O_ASYNC /* kernel/compat */ #define O_FSYNC O_SYNC /* compat */ #define FNDELAY O_NONBLOCK /* compat */ #define O_NDELAY O_NONBLOCK /* compat */ #endif #if defined(_KERNEL) #define FNONBLOCK O_NONBLOCK /* kernel */ #define FFSYNC O_SYNC /* kernel */ #define FDSYNC O_DSYNC /* kernel */ #define FRSYNC O_RSYNC /* kernel */ #define FALTIO O_ALT_IO /* kernel */ #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 !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_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 */ #endif /* Constants for fcntl's passed to the underlying fs - like ioctl's. */ #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) #define F_PARAM_MASK 0xfff #define F_PARAM_LEN(x) (((x) >> 16) & F_PARAM_MASK) #define F_PARAM_MAX 4095 #define F_FSCTL (int)0x80000000 /* This fcntl goes to the fs */ #define F_FSVOID (int)0x40000000 /* no parameters */ #define F_FSOUT (int)0x20000000 /* copy out parameter */ #define F_FSIN (int)0x10000000 /* copy in parameter */ #define F_FSINOUT (F_FSIN | F_FSOUT) #define F_FSDIRMASK (int)0x70000000 /* mask for IN/OUT/VOID */ #define F_FSPRIV (int)0x00008000 /* command is fs-specific */ /* * Define command macros for operations which, if implemented, must be * the same for all fs's. */ #define _FCN(inout, num, len) \ (F_FSCTL | inout | ((len & F_PARAM_MASK) << 16) | (num)) #define _FCNO(c) _FCN(F_FSVOID, (c), 0) #define _FCNR(c, t) _FCN(F_FSIN, (c), (int)sizeof(t)) #define _FCNW(c, t) _FCN(F_FSOUT, (c), (int)sizeof(t)) #define _FCNRW(c, t) _FCN(F_FSINOUT, (c), (int)sizeof(t)) /* * Define command macros for fs-specific commands. */ #define _FCN_FSPRIV(inout, num, len) \ (F_FSCTL | F_FSPRIV | inout | ((len & F_PARAM_MASK) << 16) | (num)) #define _FCNO_FSPRIV(c) _FCN_FSPRIV(F_FSVOID, (c), 0) #define _FCNR_FSPRIV(c, t) _FCN_FSPRIV(F_FSIN, (c), (int)sizeof(t)) #define _FCNW_FSPRIV(c, t) _FCN_FSPRIV(F_FSOUT, (c), (int)sizeof(t)) #define _FCNRW_FSPRIV(c, t) _FCN_FSPRIV(F_FSINOUT, (c), (int)sizeof(t)) #endif /* neither POSIX nor _XOPEN_SOURCE */ /* * 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 */ }; #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_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 /* Always ensure that these are consistent with and ! */ #ifndef SEEK_SET #define SEEK_SET 0 /* set file offset to offset */ #endif #ifndef SEEK_CUR #define SEEK_CUR 1 /* set file offset to current plus offset */ #endif #ifndef SEEK_END #define SEEK_END 2 /* set file offset to EOF plus offset */ #endif #ifndef _KERNEL #include __BEGIN_DECLS int open __P((const char *, int, ...)); int creat __P((const char *, mode_t)); int fcntl __P((int, int, ...)); #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) int flock __P((int, int)); #endif /* !_POSIX_C_SOURCE && !_XOPEN_SOURCE */ __END_DECLS #endif /* !_KERNEL */ #endif /* !_SYS_FCNTL_H_ */