1 | /* |
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2 | * IMFS Device Node Handlers |
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3 | * |
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4 | * This file contains the set of handlers used to map operations on |
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5 | * IMFS device nodes onto calls to the RTEMS Classic API IO Manager. |
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6 | * |
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7 | * COPYRIGHT (c) 1989-1999. |
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8 | * On-Line Applications Research Corporation (OAR). |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.OARcorp.com/rtems/license.html. |
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13 | * |
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14 | * $Id$ |
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15 | */ |
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16 | |
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17 | #include <rtems.h> |
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18 | #include <rtems/libio.h> |
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19 | #include "libio_.h" |
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20 | |
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21 | #include "imfs.h" |
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22 | |
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23 | /* |
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24 | * device_open |
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25 | * |
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26 | * This handler maps an open() operation onto rtems_io_open(). |
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27 | */ |
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28 | |
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29 | int device_open( |
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30 | rtems_libio_t *iop, |
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31 | const char *pathname, |
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32 | unsigned32 flag, |
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33 | unsigned32 mode |
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34 | ) |
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35 | { |
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36 | rtems_libio_open_close_args_t args; |
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37 | rtems_status_code status; |
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38 | IMFS_jnode_t *the_jnode; |
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39 | |
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40 | the_jnode = iop->file_info; |
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41 | |
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42 | args.iop = iop; |
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43 | args.flags = iop->flags; |
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44 | args.mode = mode; |
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45 | |
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46 | status = rtems_io_open( |
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47 | the_jnode->info.device.major, |
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48 | the_jnode->info.device.minor, |
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49 | (void *) &args |
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50 | ); |
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51 | if ( status ) |
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52 | return RTEMS_UNSATISFIED; |
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53 | |
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54 | return 0; |
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55 | } |
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56 | |
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57 | /* |
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58 | * device_close |
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59 | * |
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60 | * This handler maps a close() operation onto rtems_io_close(). |
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61 | */ |
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62 | |
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63 | int device_close( |
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64 | rtems_libio_t *iop |
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65 | ) |
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66 | { |
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67 | rtems_libio_open_close_args_t args; |
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68 | rtems_status_code status; |
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69 | IMFS_jnode_t *the_jnode; |
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70 | |
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71 | the_jnode = iop->file_info; |
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72 | |
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73 | args.iop = iop; |
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74 | args.flags = 0; |
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75 | args.mode = 0; |
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76 | |
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77 | status = rtems_io_close( |
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78 | the_jnode->info.device.major, |
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79 | the_jnode->info.device.minor, |
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80 | (void *) &args |
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81 | ); |
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82 | if ( status ) |
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83 | return RTEMS_UNSATISFIED; |
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84 | |
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85 | return 0; |
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86 | } |
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87 | |
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88 | /* |
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89 | * device_read |
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90 | * |
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91 | * This handler maps a read() operation onto rtems_io_read(). |
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92 | */ |
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93 | |
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94 | int device_read( |
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95 | rtems_libio_t *iop, |
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96 | void *buffer, |
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97 | unsigned32 count |
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98 | ) |
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99 | { |
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100 | rtems_libio_rw_args_t args; |
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101 | rtems_status_code status; |
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102 | IMFS_jnode_t *the_jnode; |
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103 | |
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104 | the_jnode = iop->file_info; |
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105 | |
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106 | args.iop = iop; |
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107 | args.offset = iop->offset; |
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108 | args.buffer = buffer; |
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109 | args.count = count; |
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110 | args.flags = iop->flags; |
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111 | args.bytes_moved = 0; |
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112 | |
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113 | status = rtems_io_read( |
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114 | the_jnode->info.device.major, |
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115 | the_jnode->info.device.minor, |
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116 | (void *) &args |
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117 | ); |
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118 | |
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119 | if ( status ) |
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120 | return -1; |
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121 | |
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122 | return args.bytes_moved; |
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123 | } |
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124 | |
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125 | /* |
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126 | * device_write |
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127 | * |
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128 | * This handler maps a write() operation onto rtems_io_write(). |
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129 | */ |
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130 | |
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131 | int device_write( |
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132 | rtems_libio_t *iop, |
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133 | const void *buffer, |
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134 | unsigned32 count |
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135 | ) |
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136 | { |
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137 | rtems_libio_rw_args_t args; |
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138 | rtems_status_code status; |
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139 | IMFS_jnode_t *the_jnode; |
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140 | |
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141 | the_jnode = iop->file_info; |
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142 | |
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143 | args.iop = iop; |
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144 | args.offset = iop->offset; |
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145 | args.buffer = (void *) buffer; |
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146 | args.count = count; |
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147 | args.flags = iop->flags; |
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148 | args.bytes_moved = 0; |
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149 | |
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150 | status = rtems_io_write( |
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151 | the_jnode->info.device.major, |
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152 | the_jnode->info.device.minor, |
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153 | (void *) &args |
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154 | ); |
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155 | |
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156 | if ( status ) |
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157 | return -1; |
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158 | |
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159 | return args.bytes_moved; |
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160 | } |
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161 | |
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162 | /* |
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163 | * device_ioctl |
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164 | * |
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165 | * This handler maps an ioctl() operation onto rtems_io_ioctl(). |
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166 | */ |
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167 | |
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168 | int device_ioctl( |
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169 | rtems_libio_t *iop, |
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170 | unsigned32 command, |
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171 | void *buffer |
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172 | ) |
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173 | { |
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174 | rtems_libio_ioctl_args_t args; |
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175 | rtems_status_code status; |
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176 | IMFS_jnode_t *the_jnode; |
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177 | |
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178 | args.iop = iop; |
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179 | args.command = command; |
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180 | args.buffer = buffer; |
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181 | |
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182 | the_jnode = iop->file_info; |
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183 | |
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184 | status = rtems_io_control( |
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185 | the_jnode->info.device.major, |
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186 | the_jnode->info.device.minor, |
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187 | (void *) &args |
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188 | ); |
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189 | |
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190 | if ( status ) |
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191 | return -1; |
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192 | |
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193 | return args.ioctl_return; |
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194 | } |
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195 | |
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196 | /* |
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197 | * device_lseek |
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198 | * |
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199 | * This handler eats all lseek() operations. |
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200 | */ |
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201 | |
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202 | int device_lseek( |
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203 | rtems_libio_t *iop, |
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204 | off_t offset, |
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205 | int whence |
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206 | ) |
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207 | { |
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208 | return 0; |
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209 | } |
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210 | |
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211 | /* |
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212 | * device_stat |
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213 | * |
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214 | * The IMFS_stat() is used. |
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215 | */ |
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216 | |
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217 | /* |
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218 | * device_rmnod |
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219 | * |
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220 | * The IMFS_rmnod() is used. |
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221 | */ |
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