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annotate packages/io/common/current/include/file.h @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
parents 435cced73e2f
children e0c0827131d1
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1 //==========================================================================
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2 //
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3 // io/common/include/file.h
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4 //
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5 // Defines for high level file I/O
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): gthomas
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35 // Contributors: gthomas
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36 // Date: 2000-01-10
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37 // Purpose:
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38 // Description:
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39 //
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40 //
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41 //####DESCRIPTIONEND####
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42 //
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43 //==========================================================================
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44
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45
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46 #ifndef _CYG_IO_FILE_H_
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47 #define _CYG_IO_FILE_H_
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48
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49 #include <pkgconf/system.h>
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50
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51 //==========================================================================
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52 // If the fileio package is loaded, we need to go through that to do all
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53 // basic IO operations. This code redefines the tags on the structures so
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54 // that they have the names expected by BSD based code.
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55
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56 #ifdef CYGPKG_IO_FILEIO
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57
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58 #include <pkgconf/io_fileio.h>
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59
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60 #define CYG_IOVEC_TAG iovec
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61 #define CYG_UIO_TAG uio
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62 #define CYG_FILEOPS_TAG fileops
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63 #define CYG_FILE_TAG file
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64 #define CYG_SELINFO_TAG selinfo
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65
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66 #include <cyg/fileio/fileio.h>
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67
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68 // File states
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69 #define FREAD CYG_FREAD
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70 #define FWRITE CYG_FWRITE
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71 #define FNONBLOCK CYG_FNONBLOCK
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72 #define FASYNC CYG_FASYNC
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73
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74 // Type of "file"
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75 #define DTYPE_VNODE CYG_FILE_TYPE_FILE /* file */
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76 #define DTYPE_SOCKET CYG_FILE_TYPE_SOCKET /* communications endpoint */
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77
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78 //==========================================================================
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79 // Otherwise define all the structs here...
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80
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81 #else // CYGPKG_IO_FILEIO
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82
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83 // High-level file I/O interfaces
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84 // Derived [in part] from OpenBSD <sys/file.h>, <sys/uio.h>, <sys/fcntl.h>
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85
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86 #include <pkgconf/io.h>
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87 #include <cyg/infra/cyg_type.h>
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88
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89 #define NFILE CYGPKG_IO_NFILE
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90
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91 struct iovec {
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92 void *iov_base; /* Base address. */
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93 CYG_ADDRWORD iov_len; /* Length. */
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94 };
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95
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96 enum uio_rw { UIO_READ, UIO_WRITE };
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97
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98 /* Segment flag values. */
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99 enum uio_seg {
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100 UIO_USERSPACE, /* from user data space */
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101 UIO_SYSSPACE /* from system space */
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102 };
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103
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104 struct uio {
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105 struct iovec *uio_iov; /* pointer to array of iovecs */
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106 int uio_iovcnt; /* number of iovecs in array */
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107 CYG_ADDRWORD uio_offset; /* offset into file this uio corresponds to */
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108 CYG_ADDRWORD uio_resid; /* residual i/o count */
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109 enum uio_seg uio_segflg; /* see above */
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110 enum uio_rw uio_rw; /* see above */
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111 };
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112
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113 /*
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114 * Limits
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115 */
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116 #define UIO_SMALLIOV 8 /* 8 on stack, else malloc */
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117
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118 // Description of open file
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119 struct file {
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120 short f_flag; /* file state */
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121 short f_type; /* descriptor type */
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122 struct fileops {
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123 int (*fo_read)(struct file *fp, struct uio *uio);
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124 int (*fo_write)(struct file *fp, struct uio *uio);
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125 int (*fo_ioctl)(struct file *fp, CYG_ADDRWORD com,
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126 CYG_ADDRWORD data);
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127 int (*fo_select)(struct file *fp, int which);
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128 int (*fo_close)(struct file *fp);
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129 } *f_ops;
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130 CYG_ADDRWORD f_offset;
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131 CYG_ADDRWORD f_data; /* vnode or socket */
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132 };
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133
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134 // File states
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135 #define FREAD 0x01
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136 #define FWRITE 0x02
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137 #define FNONBLOCK 0x10
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138 #define FASYNC 0x20
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139 #define FALLOC 0x80 // File is "busy", i.e. allocated
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140
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141 // Type of "file"
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142 #define DTYPE_VNODE 1 /* file */
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143 #define DTYPE_SOCKET 2 /* communications endpoint */
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144 #define DTYPE_PIPE 3 /* pipe */
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145
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146 externC cyg_bool getfp(int fdes, struct file **fp);
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147 externC int falloc(struct file **fp, int *fd);
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148 externC void ffree(struct file *fp);
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149
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150 //==========================================================================
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151
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152 #endif // CYGPKG_IO_FILEIO
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153
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154 //==========================================================================
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155 #endif // _CYG_IO_FILE_H_