| 1 | /*-
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| 2 | * Copyright (c) 1983, 1990, 1993
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| 3 | * The Regents of the University of California. All rights reserved.
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| 4 | * (c) UNIX System Laboratories, Inc.
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| 5 | * All or some portions of this file are derived from material licensed
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| 6 | * to the University of California by American Telephone and Telegraph
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| 7 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with
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| 8 | * the permission of UNIX System Laboratories, Inc.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | * 3. All advertising materials mentioning features or use of this software
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| 19 | * must display the following acknowledgement:
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| 20 | * This product includes software developed by the University of
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| 21 | * California, Berkeley and its contributors.
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| 22 | * 4. Neither the name of the University nor the names of its contributors
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| 23 | * may be used to endorse or promote products derived from this software
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| 24 | * without specific prior written permission.
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| 25 | *
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| 26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 36 | * SUCH DAMAGE.
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| 37 | *
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| 38 | * @(#)fcntl.h 8.3 (Berkeley) 1/21/94
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| 39 | * $FreeBSD: src/sys/sys/fcntl.h,v 1.14 2002/09/17 22:22:50 mike Exp $
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| 40 | */
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| 41 |
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| 42 | /** @file
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| 43 | * FreeBSD 5.1 + EMX
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| 44 | *
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| 45 | * @changed bird: EMX isms.
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| 46 | * @changed bird: Removed (non KERNEL) stuff we don't implement and added
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| 47 | * EMX specific stuff.
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| 48 | * @todo Consider implementing the flags and commands we don't currently
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| 49 | * include.
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| 50 | */
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| 51 |
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| 52 | #ifndef _SYS_FCNTL_H_
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| 53 | #define _SYS_FCNTL_H_
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| 54 | #define _SYS_FCNTL_H /* bird: EMX */
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| 55 |
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| 56 | /*
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| 57 | * This file includes the definitions for open and fcntl
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| 58 | * described by POSIX for <fcntl.h>; it also includes
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| 59 | * related kernel definitions.
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| 60 | */
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| 61 |
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| 62 | #include <sys/cdefs.h>
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| 63 | #include <sys/_types.h>
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| 64 |
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| 65 | #if !defined(_MODE_T_DECLARED) && !defined(_MODE_T) /* bird: EMX */
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| 66 | typedef __mode_t mode_t;
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| 67 | #define _MODE_T_DECLARED
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| 68 | #define _MODE_T /* bird: EMX */
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| 69 | #endif
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| 70 |
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| 71 | #if !defined(_OFF_T_DECLARED) && !defined(_OFF_T) /* bird: EMX */
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| 72 | typedef __off_t off_t;
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| 73 | #define _OFF_T_DECLARED
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| 74 | #define _OFF_T /* bird: EMX */
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| 75 | #endif
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| 76 |
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| 77 | #if !defined(_PID_T_DECLARED) && !defined(_PID_T) /* bird: EMX */
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| 78 | typedef __pid_t pid_t;
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| 79 | #define _PID_T_DECLARED
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| 80 | #define _PID_T /* bird: EMX */
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| 81 | #endif
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| 82 |
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| 83 | /*
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| 84 | * File status flags: these are used by open(2), fcntl(2).
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| 85 | * They are also used (indirectly) in the kernel file structure f_flags,
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| 86 | * which is a superset of the open/fcntl flags. Open flags and f_flags
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| 87 | * are inter-convertible using OFLAGS(fflags) and FFLAGS(oflags).
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| 88 | * Open/fcntl flags begin with O_; kernel-internal flags begin with F.
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| 89 | */
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| 90 | /* open-only flags */
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| 91 | #define O_RDONLY 0x0000 /* open for reading only */
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| 92 | #define O_WRONLY 0x0001 /* open for writing only */
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| 93 | #define O_RDWR 0x0002 /* open for reading and writing */
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| 94 | #define O_ACCMODE 0x0003 /* mask for above modes */
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| 95 |
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| 96 | /*
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| 97 | * Kernel encoding of open mode; separate read and write bits that are
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| 98 | * independently testable: 1 greater than the above.
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| 99 | *
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| 100 | * XXX
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| 101 | * FREAD and FWRITE are excluded from the #ifdef _KERNEL so that TIOCFLUSH,
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| 102 | * which was documented to use FREAD/FWRITE, continues to work.
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| 103 | */
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| 104 | #if __BSD_VISIBLE
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| 105 | #ifndef FREAD /* bird: safety */
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| 106 | #define FREAD 0x0001
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| 107 | #define FWRITE 0x0002
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| 108 | #endif
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| 109 | #endif /* bird: safety */
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| 110 | #define O_NONBLOCK 0x0004 /* no delay */
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| 111 | #define O_APPEND 0x0008 /* set append mode */
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| 112 | #if __BSD_VISIBLE
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| 113 | #if 0 /* bird: not implemented - start */
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| 114 | #define O_SHLOCK 0x0010 /* open with shared file lock */
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| 115 | #define O_EXLOCK 0x0020 /* open with exclusive file lock */
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| 116 | #define O_ASYNC 0x0040 /* signal pgrp when data ready */
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| 117 | #endif /* bird: not implemented - end */
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| 118 | #define O_FSYNC 0x0080 /* synchronous writes */
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| 119 | #endif
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| 120 | /* bird: EMX used 0x2000 for O_SYNC. */
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| 121 | #define O_SYNC 0x0080 /* POSIX synonym for O_FSYNC */
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| 122 | #if 0 /* bird: not implemented - start */
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| 123 | #if __BSD_VISIBLE
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| 124 | #define O_NOFOLLOW 0x0100 /* don't follow symlinks */
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| 125 | #endif
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| 126 | #endif /* bird: not implemented - end */
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| 127 | #define O_CREAT 0x0200 /* create if nonexistent */
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| 128 | #define O_TRUNC 0x0400 /* truncate to zero length */
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| 129 | #define O_EXCL 0x0800 /* error if already exists */
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| 130 | #ifdef _KERNEL
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| 131 | /* FMARK/FDEFER kept in f_gcflags */
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| 132 | #define FMARK 0x1 /* mark during gc() */
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| 133 | #define FDEFER 0x2 /* defer for next gc pass */
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| 134 | #define FHASLOCK 0x4000 /* descriptor holds advisory lock */
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| 135 | #endif
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| 136 |
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| 137 | /* Defined by POSIX 1003.1; BSD default, but must be distinct from O_RDONLY. */
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| 138 | /* bird: EMX used 0x4000 for O_NOCTTY. */
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| 139 | #define O_NOCTTY 0x8000 /* don't assign controlling terminal */
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| 140 |
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| 141 | #if 0 /* bird: not implemented - start */
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| 142 | #if __BSD_VISIBLE
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| 143 | /* Attempt to bypass buffer cache */
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| 144 | #define O_DIRECT 0x00010000
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| 145 | #endif
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| 146 | #endif /* bird: not implemented - end */
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| 147 |
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| 148 | /*
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| 149 | * XXX missing O_DSYNC, O_RSYNC.
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| 150 | */
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| 151 |
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| 152 | #ifdef _KERNEL
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| 153 | /* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE */
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| 154 | #define FFLAGS(oflags) ((oflags) + 1)
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| 155 | #define OFLAGS(fflags) ((fflags) - 1)
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| 156 |
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| 157 | /* bits to save after open */
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| 158 | #define FMASK (FREAD|FWRITE|FAPPEND|FASYNC|FFSYNC|FNONBLOCK|O_DIRECT)
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| 159 | /* bits settable by fcntl(F_SETFL, ...) */
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| 160 | #define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK|FPOSIXSHM|O_DIRECT)
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| 161 | #endif
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| 162 |
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| 163 | /*
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| 164 | * The O_* flags used to have only F* names, which were used in the kernel
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| 165 | * and by fcntl. We retain the F* names for the kernel f_flag field
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| 166 | * and for backward compatibility for fcntl. These flags are deprecated.
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| 167 | */
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| 168 | #if __BSD_VISIBLE
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| 169 | #define FAPPEND O_APPEND /* kernel/compat */
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| 170 | #if 0 /* bird: not implemented - start */
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| 171 | #define FASYNC O_ASYNC /* kernel/compat */
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| 172 | #endif /* bird: not implemented - end */
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| 173 | #define FFSYNC O_FSYNC /* kernel */
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| 174 | #define FNONBLOCK O_NONBLOCK /* kernel */
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| 175 | #define FNDELAY O_NONBLOCK /* compat */
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| 176 | #define O_NDELAY O_NONBLOCK /* compat */
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| 177 | #endif
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| 178 |
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| 179 | #if 0 /* bird: not implemented - start */
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| 180 | /*
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| 181 | * We are out of bits in f_flag (which is a short). However,
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| 182 | * the flag bits not set in FMASK are only meaningful in the
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| 183 | * initial open syscall. Those bits can thus be given a
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| 184 | * different meaning for fcntl(2).
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| 185 | */
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| 186 | #if __BSD_VISIBLE
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| 187 |
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| 188 | /*
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| 189 | * Set by shm_open(3) to get automatic MAP_ASYNC behavior
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| 190 | * for POSIX shared memory objects (which are otherwise
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| 191 | * implemented as plain files).
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| 192 | */
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| 193 | #define FPOSIXSHM O_NOFOLLOW
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| 194 | #endif
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| 195 | #endif /* bird: not implemented - end */
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| 196 |
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| 197 | /*
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| 198 | * Constants used for fcntl(2)
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| 199 | */
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| 200 |
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| 201 | /* command values */
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| 202 | /* bird: EMX used 5 for F_DUPFD. */
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| 203 | #define F_DUPFD 0 /* duplicate file descriptor */
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| 204 | /* bird: EMX used 3 for F_GETFD. */
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| 205 | #define F_GETFD 1 /* get file descriptor flags */
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| 206 | /* bird: EMX used 4 for F_SETFD. */
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| 207 | #define F_SETFD 2 /* set file descriptor flags */
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| 208 | /* bird: EMX used 1 for F_GETFL. */
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| 209 | #define F_GETFL 3 /* get file status flags */
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| 210 | /* bird: EMX used 2 for F_SETFL. */
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| 211 | #define F_SETFL 4 /* set file status flags */
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| 212 | #if 0 /* bird: not implemented - start */
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| 213 | #if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
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| 214 | #define F_GETOWN 5 /* get SIGIO/SIGURG proc/pgrp */
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| 215 | #define F_SETOWN 6 /* set SIGIO/SIGURG proc/pgrp */
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| 216 | #endif
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| 217 | #endif /* bird: not implemented - end */
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| 218 | #define F_GETLK 7 /* get record locking information */
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| 219 | #define F_SETLK 8 /* set record locking information */
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| 220 | #define F_SETLKW 9 /* F_SETLK; wait if blocked */
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| 221 |
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| 222 |
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| 223 | /* file descriptor flags (F_GETFD, F_SETFD) */
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| 224 | #define FD_CLOEXEC 1 /* close-on-exec flag */
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| 225 |
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| 226 | /* record locking flags (F_GETLK, F_SETLK, F_SETLKW) */
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| 227 | #define F_RDLCK 1 /* shared or read lock */
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| 228 | #define F_UNLCK 2 /* unlock */
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| 229 | #define F_WRLCK 3 /* exclusive or write lock */
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| 230 | #ifdef _KERNEL
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| 231 | #define F_WAIT 0x010 /* Wait until lock is granted */
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| 232 | #define F_FLOCK 0x020 /* Use flock(2) semantics for lock */
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| 233 | #define F_POSIX 0x040 /* Use POSIX semantics for lock */
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| 234 | #endif
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| 235 |
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| 236 | /*
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| 237 | * Advisory file segment locking data type -
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| 238 | * information passed to system by user
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| 239 | */
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| 240 | struct flock {
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| 241 | off_t l_start; /* starting offset */
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| 242 | off_t l_len; /* len = 0 means until end of file */
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| 243 | pid_t l_pid; /* lock owner */
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| 244 | short l_type; /* lock type: read/write, etc. */
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| 245 | short l_whence; /* type of l_start */
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| 246 | };
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| 247 |
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| 248 |
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| 249 | #if __BSD_VISIBLE
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| 250 | /* lock operations for flock(2) */
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| 251 | #define LOCK_SH 0x01 /* shared file lock */
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| 252 | #define LOCK_EX 0x02 /* exclusive file lock */
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| 253 | #define LOCK_NB 0x04 /* don't block when locking */
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| 254 | #define LOCK_UN 0x08 /* unlock file */
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| 255 | #endif
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| 256 |
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| 257 | /*
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| 258 | * XXX missing posix_fadvise() and posix_fallocate(), and POSIX_FADV_* macros.
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| 259 | */
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| 260 |
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| 261 | #ifndef _KERNEL
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| 262 | __BEGIN_DECLS
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| 263 | int open(const char *, int, ...);
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| 264 | int creat(const char *, mode_t);
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| 265 | int fcntl(int, int, ...);
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| 266 | #if __BSD_VISIBLE
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| 267 | int flock(int, int);
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| 268 | #endif
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| 269 | __END_DECLS
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| 270 | #endif
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| 271 |
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| 272 | /* bird: EMX stuff - start */
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| 273 | #if !defined (O_TEXT)
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| 274 | /* Open flags.
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| 275 | As stated in the FreeBSD part, there is supposidly a limited number of bits
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| 276 | available. We'll try keep it suitable for 16bit just in case (don't care to
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| 277 | check what we use right now) because that'll enable us to share a 32-bit flag
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| 278 | variable per handle to both status (O_*) flags and descriptor (FD_*) flags.
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| 279 |
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| 280 | When we've disabled a few BSD flags and leave out KERNEL stuff the following
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| 281 | bits are available:
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| 282 | 0x0010, 0x0020, 0x0040, 0x0100, 0x1000, 0x4000*, 0x2000
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| 283 | */
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| 284 | #define O_TEXT 0x0010
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| 285 | #define O_BINARY 0x0100
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| 286 | #define O_SIZE 0x0020 /* EMX used 0x8000 for O_SIZE. */
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| 287 | #if !defined (_POSIX_SOURCE) || defined(__USE_EMX)
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| 288 | #define O_NOINHERIT 0x1000 /* EMX used 0x1000 for O_NOINHERIT. */
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| 289 | #endif
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| 290 | #endif
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| 291 |
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| 292 | /* fcntl command */
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| 293 | /* bird: EMX specifics - start */
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| 294 | #define F_GETOSFD 20 /* RSXNT */ /* F_GETOSFD used to be 6 */
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| 295 | /* bird: EMX specifics - end */
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| 296 |
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| 297 |
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| 298 | #if !defined (F_OK) /* bird: Really defined in unistd.h, but Linux and EMX does it here too. */
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| 299 | /* access function */
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| 300 | #define F_OK 0 /* test for existence of file */
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| 301 | #define X_OK 0x01 /* test for execute or search permission */
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| 302 | #define W_OK 0x02 /* test for write permission */
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| 303 | #define R_OK 0x04 /* test for read permission */
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| 304 | #endif
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| 305 |
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| 306 | #if !defined (_POSIX_SOURCE) || defined (_WITH_UNDERSCORE) || defined(__USE_EMX)
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| 307 | __BEGIN_DECLS
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| 308 | int _creat (__const__ char *, int);
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| 309 | int _fcntl (int, int, ...);
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| 310 | int _flock (int, int);
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| 311 | int _open (__const__ char *, int, ...);
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| 312 | __END_DECLS
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| 313 | #endif
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| 314 | /* bird: EMX stuff - end */
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| 315 |
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| 316 | #endif /* !_SYS_FCNTL_H_ */
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