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Diffstat (limited to 'sys/sys/fcntl.h')
| -rw-r--r-- | sys/sys/fcntl.h | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/sys/sys/fcntl.h b/sys/sys/fcntl.h new file mode 100644 index 0000000..e964ea4 --- /dev/null +++ b/sys/sys/fcntl.h @@ -0,0 +1,220 @@ +/* $OpenBSD: fcntl.h,v 1.22 2019/01/21 18:09:21 anton Exp $ */ +/* $NetBSD: fcntl.h,v 1.8 1995/03/26 20:24:12 jtc 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. 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 <fcntl.h>; it also includes + * related kernel definitions. + */ + +#include <sys/cdefs.h> +#ifndef _KERNEL +#include <sys/types.h> +#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 /* backwards compatibility */ +#define O_NOFOLLOW 0x0100 /* if path is a symlink, don't follow */ +#endif +#if __POSIX_VISIBLE >= 199309 || __XPG_VISIBLE >= 420 +#define O_SYNC 0x0080 /* synchronous writes */ +#endif +#define O_CREAT 0x0200 /* create if nonexistent */ +#define O_TRUNC 0x0400 /* truncate to zero length */ +#define O_EXCL 0x0800 /* error if already exists */ + +/* + * POSIX 1003.1 specifies a higher granularity for synchronous operations + * than we support. Since synchronicity is all or nothing in OpenBSD + * we just define these to be the same as O_SYNC. + */ +#define O_DSYNC O_SYNC /* synchronous data writes */ +#define O_RSYNC O_SYNC /* synchronous reads */ + +/* defined by POSIX 1003.1; BSD default, this bit is not required */ +#define O_NOCTTY 0x8000 /* don't assign controlling terminal */ + +/* defined by POSIX Issue 7 */ +#define O_CLOEXEC 0x10000 /* atomically set FD_CLOEXEC */ +#define O_DIRECTORY 0x20000 /* fail if not a directory */ + +#ifdef _KERNEL +/* + * convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE. + * For out-of-range values for the flags, be slightly careful (but lossy). + */ +#define FFLAGS(oflags) (((oflags) & ~O_ACCMODE) | (((oflags) + 1) & O_ACCMODE)) +#define OFLAGS(fflags) (((fflags) & ~O_ACCMODE) | (((fflags) - 1) & O_ACCMODE)) + +/* 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) +#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_flags field + * and for backward compatibility for fcntl. + */ +#if __BSD_VISIBLE +#define FAPPEND O_APPEND /* kernel/compat */ +#define FASYNC O_ASYNC /* kernel/compat */ +#define FFSYNC O_SYNC /* kernel */ +#define FNONBLOCK O_NONBLOCK /* kernel */ +#define FNDELAY 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 */ +#if __POSIX_VISIBLE >= 200112 || __XPG_VISIBLE >= 500 +#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 */ +#if __POSIX_VISIBLE >= 200809 +#define F_DUPFD_CLOEXEC 10 /* duplicate with FD_CLOEXEC set */ +#endif +#if __BSD_VISIBLE +#define F_ISATTY 11 /* used by isatty(3) */ +#endif + +/* 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_INTR 0x080 /* Lock operation interrupted */ +#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 */ +}; + + +#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 >= 200809 +#define AT_FDCWD -100 + +#define AT_EACCESS 0x01 +#define AT_SYMLINK_NOFOLLOW 0x02 +#define AT_SYMLINK_FOLLOW 0x04 +#define AT_REMOVEDIR 0x08 +#endif + +#ifndef _KERNEL +__BEGIN_DECLS +int open(const char *, int, ...); +int creat(const char *, mode_t); +int fcntl(int, int, ...); +#if __BSD_VISIBLE +int flock(int, int); +#endif +#if __POSIX_VISIBLE >= 200809 +int openat(int, const char *, int, ...); +#endif +__END_DECLS +#endif + +#endif /* !_SYS_FCNTL_H_ */ |