00001 /*- 00002 * © Portions copyright (c) 2005 Nokia Corporation. All rights reserved. 00003 * © Portions copyright (c) 2006 Symbian Software Ltd. All rights reserved. 00004 * Copyright (c) 1983, 1990, 1993 00005 * The Regents of the University of California. All rights reserved. 00006 * (c) UNIX System Laboratories, Inc. 00007 * All or some portions of this file are derived from material licensed 00008 * to the University of California by American Telephone and Telegraph 00009 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 00010 * the permission of UNIX System Laboratories, Inc. 00011 * 00012 * Redistribution and use in source and binary forms, with or without 00013 * modification, are permitted provided that the following conditions 00014 * are met: 00015 * 1. Redistributions of source code must retain the above copyright 00016 * notice, this list of conditions and the following disclaimer. 00017 * 2. Redistributions in binary form must reproduce the above copyright 00018 * notice, this list of conditions and the following disclaimer in the 00019 * documentation and/or other materials provided with the distribution. 00020 * 4. Neither the name of the University nor the names of its contributors 00021 * may be used to endorse or promote products derived from this software 00022 * without specific prior written permission. 00023 * 00024 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 00025 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00026 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00027 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 00028 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00029 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00030 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00031 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00032 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00033 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00034 * SUCH DAMAGE. 00035 * 00036 * @(#)fcntl.h 8.3 (Berkeley) 1/21/94 00037 * $FreeBSD: src/sys/sys/fcntl.h,v 1.16 2004/04/07 04:19:49 imp Exp $ 00038 */ 00039 00040 #ifndef _SYS_FCNTL_H_ 00041 #define _SYS_FCNTL_H_ 00042 00043 /* 00044 * This file includes the definitions for open and fcntl 00045 * described by POSIX for <fcntl.h>; it also includes 00046 * related kernel definitions. 00047 */ 00048 00049 #include <sys/cdefs.h> 00050 #include <sys/_types.h> 00051 00052 #ifndef _MODE_T_DECLARED 00053 typedef __mode_t mode_t; 00054 #define _MODE_T_DECLARED 00055 #endif 00056 00057 #ifndef _OFF_T_DECLARED 00058 typedef __off_t off_t; 00059 #define _OFF_T_DECLARED 00060 #endif 00061 00062 #ifndef _PID_T_DECLARED 00063 typedef __pid_t pid_t; 00064 #define _PID_T_DECLARED 00065 #endif 00066 00067 /* 00068 * File status flags: these are used by open(2), fcntl(2). 00069 * They are also used (indirectly) in the kernel file structure f_flags, 00070 * which is a superset of the open/fcntl flags. Open flags and f_flags 00071 * are inter-convertible using OFLAGS(fflags) and FFLAGS(oflags). 00072 * Open/fcntl flags begin with O_; kernel-internal flags begin with F. 00073 */ 00074 /* open-only flags */ 00075 #define O_RDONLY 0x0000 /* open for reading only */ 00076 #define O_WRONLY 0x0001 /* open for writing only */ 00077 #define O_RDWR 0x0002 /* open for reading and writing */ 00078 #define O_ACCMODE 0x0003 /* mask for above modes */ 00079 00080 /* 00081 * Kernel encoding of open mode; separate read and write bits that are 00082 * independently testable: 1 greater than the above. 00083 * 00084 * XXX 00085 * FREAD and FWRITE are excluded from the #ifdef _KERNEL so that TIOCFLUSH, 00086 * which was documented to use FREAD/FWRITE, continues to work. 00087 */ 00088 #if __BSD_VISIBLE 00089 #define FREAD 0x0001 00090 #define FWRITE 0x0002 00091 #endif 00092 #define O_NONBLOCK 0x0004 /* no delay */ 00093 #define O_APPEND 0x0008 /* set append mode */ 00094 #if __BSD_VISIBLE 00095 #define O_SHLOCK 0x0010 /* open with shared file lock */ 00096 #define O_EXLOCK 0x0020 /* open with exclusive file lock */ 00097 #define O_ASYNC 0x0040 /* signal pgrp when data ready */ 00098 #define O_FSYNC 0x0080 /* synchronous writes */ 00099 #endif 00100 #define O_SYNC 0x0080 /* POSIX synonym for O_FSYNC */ 00101 #if __BSD_VISIBLE 00102 #define O_NOFOLLOW 0x0100 /* don't follow symlinks */ 00103 #endif 00104 #define O_CREAT 0x0200 /* create if nonexistent */ 00105 #define O_TRUNC 0x0400 /* truncate to zero length */ 00106 #define O_EXCL 0x0800 /* error if already exists */ 00107 #ifdef _KERNEL 00108 #define FHASLOCK 0x4000 /* descriptor holds advisory lock */ 00109 #endif 00110 00111 /* Defined by POSIX 1003.1; BSD default, but must be distinct from O_RDONLY. */ 00112 #define O_NOCTTY 0x8000 /* don't assign controlling terminal */ 00113 00114 #if __BSD_VISIBLE 00115 /* Attempt to bypass buffer cache */ 00116 #define O_DIRECT 0x00010000 00117 #endif 00118 00119 //Copied from MRT1.0 fcntl.h header 00120 #define _FBUFFERED 0x10000 /* buffer at the interface to the file system */ 00121 #define _FBINARY 0x10000 00122 #define _FTEXT 0x20000 00123 #define O_BINARY _FBINARY 00124 #define O_TEXT _FTEXT 00125 #define O_BUFFERED _FBUFFERED 00126 00127 /* 00128 * XXX missing O_DSYNC, O_RSYNC. 00129 */ 00130 00131 #ifdef _KERNEL 00132 /* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE */ 00133 #define FFLAGS(oflags) ((oflags) + 1) 00134 #define OFLAGS(fflags) ((fflags) - 1) 00135 00136 /* bits to save after open */ 00137 #define FMASK (FREAD|FWRITE|FAPPEND|FASYNC|FFSYNC|FNONBLOCK|O_DIRECT) 00138 /* bits settable by fcntl(F_SETFL, ...) */ 00139 #define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK|FPOSIXSHM|O_DIRECT) 00140 #endif 00141 00142 /* 00143 * The O_* flags used to have only F* names, which were used in the kernel 00144 * and by fcntl. We retain the F* names for the kernel f_flag field 00145 * and for backward compatibility for fcntl. These flags are deprecated. 00146 */ 00147 #if __BSD_VISIBLE 00148 #define FAPPEND O_APPEND /* kernel/compat */ 00149 #define FASYNC O_ASYNC /* kernel/compat */ 00150 #define FFSYNC O_FSYNC /* kernel */ 00151 #define FNONBLOCK O_NONBLOCK /* kernel */ 00152 #define FNDELAY O_NONBLOCK /* compat */ 00153 #define O_NDELAY O_NONBLOCK /* compat */ 00154 #endif 00155 00156 /* 00157 * We are out of bits in f_flag (which is a short). However, 00158 * the flag bits not set in FMASK are only meaningful in the 00159 * initial open syscall. Those bits can thus be given a 00160 * different meaning for fcntl(2). 00161 */ 00162 #if __BSD_VISIBLE 00163 00164 /* 00165 * Set by shm_open(3) to get automatic MAP_ASYNC behavior 00166 * for POSIX shared memory objects (which are otherwise 00167 * implemented as plain files). 00168 */ 00169 #define FPOSIXSHM O_NOFOLLOW 00170 #endif 00171 00172 /* 00173 * Constants used for fcntl(2) 00174 */ 00175 00176 /* command values */ 00177 #define F_DUPFD 0 /* duplicate file descriptor */ 00178 #define F_GETFD 1 /* get file descriptor flags */ 00179 #define F_SETFD 2 /* set file descriptor flags */ 00180 #define F_GETFL 3 /* get file status flags */ 00181 #define F_SETFL 4 /* set file status flags */ 00182 #if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112 00183 #define F_GETOWN 5 /* get SIGIO/SIGURG proc/pgrp */ 00184 #define F_SETOWN 6 /* set SIGIO/SIGURG proc/pgrp */ 00185 #endif 00186 #define F_GETLK 7 /* get record locking information */ 00187 #define F_SETLK 8 /* set record locking information */ 00188 #define F_SETLKW 9 /* F_SETLK; wait if blocked */ 00189 00190 /* file descriptor flags (F_GETFD, F_SETFD) */ 00191 #define FD_CLOEXEC 1 /* close-on-exec flag */ 00192 00193 /* record locking flags (F_GETLK, F_SETLK, F_SETLKW) */ 00194 #define F_RDLCK 1 /* shared or read lock */ 00195 #define F_UNLCK 2 /* unlock */ 00196 #define F_WRLCK 3 /* exclusive or write lock */ 00197 #ifdef _KERNEL 00198 #define F_WAIT 0x010 /* Wait until lock is granted */ 00199 #define F_FLOCK 0x020 /* Use flock(2) semantics for lock */ 00200 #define F_POSIX 0x040 /* Use POSIX semantics for lock */ 00201 #endif 00202 00203 /* 00204 * Advisory file segment locking data type - 00205 * information passed to system by user 00206 */ 00207 struct flock { 00208 off_t l_start; /* starting offset */ 00209 off_t l_len; /* len = 0 means until end of file */ 00210 pid_t l_pid; /* lock owner */ 00211 short l_type; /* lock type: read/write, etc. */ 00212 short l_whence; /* type of l_start */ 00213 }; 00214 00215 00216 #if __BSD_VISIBLE 00217 /* lock operations for flock(2) */ 00218 #define LOCK_SH 0x01 /* shared file lock */ 00219 #define LOCK_EX 0x02 /* exclusive file lock */ 00220 #define LOCK_NB 0x04 /* don't block when locking */ 00221 #define LOCK_UN 0x08 /* unlock file */ 00222 #endif 00223 00224 /* 00225 * XXX missing posix_fadvise() and posix_fallocate(), and POSIX_FADV_* macros. 00226 */ 00227 00228 #ifndef _KERNEL 00229 __BEGIN_DECLS 00230 IMPORT_C int open(const char *, int, ...); 00231 IMPORT_C int creat(const char *, mode_t); 00232 IMPORT_C int fcntl(int, int, ...); 00233 #if __BSD_VISIBLE 00234 int flock(int, int); 00235 #endif 00236 __END_DECLS 00237 #endif 00238 00239 #endif /* !_SYS_FCNTL_H_ */