root / prex-0.9.0 / include / sys / fcntl.h @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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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. Neither the name of the University nor the names of its contributors
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19 | * may be used to endorse or promote products derived from this software
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20 | * without specific prior written permission.
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21 | *
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22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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32 | * SUCH DAMAGE.
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33 | *
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34 | * @(#)fcntl.h 8.3 (Berkeley) 1/21/94
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35 | */
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36 | |||
37 | #ifndef _SYS_FCNTL_H_
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38 | #define _SYS_FCNTL_H_
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39 | |||
40 | /*
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41 | * This file includes the definitions for open and fcntl
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42 | * described by POSIX for <fcntl.h>.
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43 | */
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44 | |||
45 | #include <sys/types.h> |
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46 | |||
47 | /*
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48 | * File status flags: these are used by open(2), fcntl(2).
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49 | * They are also used (indirectly) in the kernel file structure f_flags,
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50 | * which is a superset of the open/fcntl flags. Open flags and f_flags
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51 | * are inter-convertible using OFLAGS(fflags) and FFLAGS(oflags).
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52 | * Open/fcntl flags begin with O_; kernel-internal flags begin with F.
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53 | */
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54 | /* open-only flags */
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55 | #define O_RDONLY 0x00000000 /* open for reading only */ |
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56 | #define O_WRONLY 0x00000001 /* open for writing only */ |
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57 | #define O_RDWR 0x00000002 /* open for reading and writing */ |
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58 | #define O_ACCMODE 0x00000003 /* mask for above modes */ |
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59 | |||
60 | /*
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61 | * Kernel encoding of open mode; separate read and write bits that are
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62 | * independently testable: 1 greater than the above.
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63 | */
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64 | #define FREAD 0x00000001 |
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65 | #define FWRITE 0x00000002 |
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66 | |||
67 | #define O_NONBLOCK 0x00000004 /* no delay */ |
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68 | #define O_APPEND 0x00000008 /* set append mode */ |
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69 | #define O_SHLOCK 0x00000010 /* open with shared file lock */ |
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70 | #define O_EXLOCK 0x00000020 /* open with exclusive file lock */ |
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71 | #define O_ASYNC 0x00000040 /* signal pgrp when data ready */ |
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72 | #define O_SYNC 0x00000080 /* synchronous writes */ |
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73 | #define O_CREAT 0x00000200 /* create if nonexistent */ |
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74 | #define O_TRUNC 0x00000400 /* truncate to zero length */ |
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75 | #define O_EXCL 0x00000800 /* error if already exists */ |
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76 | |||
77 | #define FPIPE 0x00010000 /* pipe */ |
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78 | |||
79 | /* defined by POSIX 1003.1; BSD default, so no bit required */
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80 | #define O_NOCTTY 0 /* don't assign controlling terminal */ |
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81 | |||
82 | /* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE */
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83 | #define FFLAGS(oflags) ((oflags) + 1) |
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84 | #define OFLAGS(fflags) ((fflags) - 1) |
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85 | |||
86 | /*
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87 | * Constants used for fcntl(2)
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88 | */
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89 | |||
90 | /* command values */
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91 | #define F_DUPFD 0 /* duplicate file descriptor */ |
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92 | #define F_GETFD 1 /* get file descriptor flags */ |
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93 | #define F_SETFD 2 /* set file descriptor flags */ |
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94 | #define F_GETFL 3 /* get file status flags */ |
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95 | #define F_SETFL 4 /* set file status flags */ |
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96 | #define F_GETOWN 5 /* get SIGIO/SIGURG proc/pgrp */ |
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97 | #define F_SETOWN 6 /* set SIGIO/SIGURG proc/pgrp */ |
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98 | #define F_GETLK 7 /* get record locking information */ |
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99 | #define F_SETLK 8 /* set record locking information */ |
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100 | #define F_SETLKW 9 /* F_SETLK; wait if blocked */ |
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101 | |||
102 | /* file descriptor flags (F_GETFD, F_SETFD) */
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103 | #define FD_CLOEXEC 1 /* close-on-exec flag */ |
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104 | |||
105 | /* record locking flags (F_GETLK, F_SETLK, F_SETLKW) */
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106 | #define F_RDLCK 1 /* shared or read lock */ |
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107 | #define F_UNLCK 2 /* unlock */ |
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108 | #define F_WRLCK 3 /* exclusive or write lock */ |
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109 | |||
110 | /*
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111 | * Advisory file segment locking data type -
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112 | * information passed to system by user
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113 | */
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114 | struct flock {
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115 | off_t l_start; /* starting offset */
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116 | off_t l_len; /* len = 0 means until end of file */
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117 | pid_t l_pid; /* lock owner */
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118 | short l_type; /* lock type: read/write, etc. */ |
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119 | short l_whence; /* type of l_start */ |
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120 | }; |
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121 | |||
122 | /* lock operations for flock(2) */
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123 | #define LOCK_SH 0x01 /* shared file lock */ |
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124 | #define LOCK_EX 0x02 /* exclusive file lock */ |
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125 | #define LOCK_NB 0x04 /* don't block when locking */ |
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126 | #define LOCK_UN 0x08 /* unlock file */ |
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127 | |||
128 | |||
129 | #include <sys/cdefs.h> |
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130 | |||
131 | __BEGIN_DECLS |
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132 | int open(const char *, int, ...); |
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133 | int creat(const char *, mode_t); |
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134 | int fcntl(int, int, ...); |
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135 | #if 0
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136 | int flock(int, int);
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137 | #endif
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138 | __END_DECLS |
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139 | |||
140 | #endif /* !_SYS_FCNTL_H_ */ |