Sungmin Choi | 5fd819d | 2012-07-18 01:49:40 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <stdio.h> |
| 18 | #include <stdlib.h> |
| 19 | #include <string.h> |
| 20 | #include <fcntl.h> |
| 21 | #include <unistd.h> |
| 22 | #include <errno.h> |
| 23 | #include <sys/stat.h> |
| 24 | #include <sys/types.h> |
| 25 | |
| 26 | #include "wfc_util_log.h" |
| 27 | |
| 28 | /* |
| 29 | static void wfc_util_printf(char *pSPointer, int length) |
| 30 | { |
| 31 | char *pPrintBuff = NULL; |
| 32 | |
| 33 | if( NULL == pSPointer || 0 >= length ) { |
| 34 | wfc_util_log_error("wfc_util_printf : unvalid parameters"); |
| 35 | return; |
| 36 | } |
| 37 | |
| 38 | wfc_util_log_error("wfc_util_printf : lenght is (%d)", length); |
| 39 | pPrintBuff = malloc(length+1); |
| 40 | |
| 41 | if( NULL != pPrintBuff ) { |
| 42 | memset( pPrintBuff, 0, (length+1) ); |
| 43 | memcpy(pPrintBuff, pSPointer, length); |
| 44 | |
| 45 | wfc_util_log_error("wfc_util_printf : %s", pPrintBuff); |
| 46 | |
| 47 | free(pPrintBuff); |
| 48 | } else { |
| 49 | wfc_util_log_error("wfc_util_printf : can not malloc(%d)", (length+1)); |
| 50 | } |
| 51 | return; |
| 52 | } |
| 53 | */ |
| 54 | |
| 55 | static void wfc_util_finsert_new_string(int fd, char **ppReadedBuff, char *pNewStringValue, char *pEndOfCfg) |
| 56 | { |
| 57 | off_t sz_file; |
| 58 | int sz_backupBuff = 0; |
| 59 | char *pReadBuff = NULL, *pBackupBuff = NULL; |
| 60 | char *pSPointer = NULL, *pETagPointer = NULL; |
| 61 | |
| 62 | if( 0 == fd || NULL == pNewStringValue || 0 == strlen(pNewStringValue) ) { |
| 63 | wfc_util_log_error("wfc_util_finsert_new_string : unvalid parameters"); |
| 64 | return; |
| 65 | } |
| 66 | |
| 67 | if( NULL == ppReadedBuff) { |
| 68 | // TODO: |
| 69 | return; |
| 70 | } else { |
| 71 | pReadBuff = *ppReadedBuff; |
| 72 | } |
| 73 | |
| 74 | /* |
| 75 | * find END TAG string |
| 76 | */ |
| 77 | pETagPointer = strstr(pReadBuff, pEndOfCfg); |
| 78 | pSPointer = pETagPointer - 1; |
| 79 | |
| 80 | /* |
| 81 | * calcurate file size and size of the tail of file |
| 82 | */ |
| 83 | sz_file = lseek( fd, 0, SEEK_END ); |
| 84 | sz_backupBuff = (int)sz_file - (pETagPointer - pReadBuff); |
| 85 | |
| 86 | /* |
| 87 | * prefare the buffer to store the tail of file |
| 88 | */ |
| 89 | pBackupBuff = malloc(sz_backupBuff); |
| 90 | |
| 91 | if( NULL != pBackupBuff ) { |
| 92 | /* |
| 93 | * copy the tail of file. |
| 94 | */ |
| 95 | memset( pBackupBuff, 0, sz_backupBuff ); |
| 96 | memcpy( pBackupBuff, pETagPointer, sz_backupBuff ); |
| 97 | |
| 98 | /* |
| 99 | * write new string. |
| 100 | */ |
| 101 | lseek( fd, (int)(pSPointer-pReadBuff), SEEK_SET ); |
| 102 | write( fd, pNewStringValue, strlen(pNewStringValue)); |
| 103 | |
| 104 | /* |
| 105 | * update pETagPointer. |
| 106 | */ |
| 107 | pETagPointer = pSPointer + strlen(pNewStringValue); |
| 108 | |
| 109 | /* |
| 110 | * write the tail of file. |
| 111 | */ |
| 112 | lseek( fd, (int)(pETagPointer-pReadBuff), SEEK_SET ); |
| 113 | write( fd, pBackupBuff, sz_backupBuff ); |
| 114 | |
| 115 | ftruncate(fd, sz_file + strlen(pNewStringValue) - 1); /* we use "-1" becasue of "pSPointer = pETagPointer - 1"*/ |
| 116 | |
| 117 | free(pBackupBuff); |
| 118 | |
| 119 | /* |
| 120 | * make new *ppReadedBuff |
| 121 | */ |
| 122 | if( NULL != ppReadedBuff) { |
| 123 | // TODO: |
| 124 | } |
| 125 | } else { |
| 126 | wfc_util_log_error("wfc_util_finsert_new_string : can not malloc(%d)", sz_backupBuff); |
| 127 | } |
| 128 | |
| 129 | return; |
| 130 | } |
| 131 | |
| 132 | static void wfc_util_fupdate_string(int fd, char **ppReadedBuff, |
| 133 | char *pETagPointer, char *pSValuePointer, char *pNewValueString) |
| 134 | { |
| 135 | off_t sz_file; |
| 136 | int sz_newReadBuff = 0; |
| 137 | char *pReadBuff = NULL, *pNewReadBuff = NULL, *pCurReadBuff = NULL; |
| 138 | |
| 139 | if( 0 == fd ) { |
| 140 | wfc_util_log_error("wfc_util_fupdate_string : unvalid parameters"); |
| 141 | return; |
| 142 | } |
| 143 | |
| 144 | if( NULL == ppReadedBuff) { |
| 145 | // TODO: |
| 146 | return; |
| 147 | } else { |
| 148 | pReadBuff = *ppReadedBuff; |
| 149 | } |
| 150 | |
| 151 | /* |
| 152 | * calcurate file size and new file size |
| 153 | */ |
| 154 | sz_file = lseek( fd, 0, SEEK_END ); |
| 155 | sz_newReadBuff = (int)sz_file - (int)(pETagPointer - pSValuePointer) + strlen(pNewValueString); |
| 156 | |
| 157 | /* |
| 158 | * prefare the buffer to read file |
| 159 | */ |
| 160 | pNewReadBuff = malloc(sz_newReadBuff); |
| 161 | |
| 162 | if( NULL != pNewReadBuff ) { |
| 163 | /* |
| 164 | * copy buffer |
| 165 | */ |
| 166 | memset( pNewReadBuff, 0, sz_file ); |
| 167 | pCurReadBuff = pNewReadBuff; |
| 168 | memcpy( pNewReadBuff, pReadBuff, (int)(pSValuePointer-pReadBuff) ); |
| 169 | pCurReadBuff += (int)(pSValuePointer-pReadBuff); |
| 170 | |
| 171 | /* |
| 172 | * copy new value string |
| 173 | */ |
| 174 | memcpy( pCurReadBuff, pNewValueString, strlen(pNewValueString)); |
| 175 | pCurReadBuff += strlen(pNewValueString); |
| 176 | |
| 177 | /* |
| 178 | * copy the remained buffer |
| 179 | */ |
| 180 | memcpy( pCurReadBuff, pETagPointer, ((int)(sz_file) - (int)(pETagPointer - pReadBuff) + 1)); |
| 181 | |
| 182 | /* |
| 183 | * write file and update the file size |
| 184 | */ |
| 185 | lseek( fd, 0, SEEK_SET ); |
| 186 | write( fd, pNewReadBuff, sz_newReadBuff); |
| 187 | ftruncate(fd, sz_newReadBuff); |
| 188 | |
| 189 | free(pNewReadBuff); |
| 190 | } else { |
| 191 | wfc_util_log_error("wfc_util_fupdate_string : can not malloc(%d)", (int)sz_newReadBuff); |
| 192 | } |
| 193 | |
| 194 | return; |
| 195 | } |
| 196 | |
| 197 | /* |
| 198 | * wfc_util_fset_buffer |
| 199 | * |
| 200 | * return : void |
| 201 | */ |
| 202 | void wfc_util_fset_buffer(char *pFileName, int positionStart, unsigned char *pNewValue, int newValueLength) |
| 203 | { |
| 204 | int fd; |
| 205 | off_t sz_file; |
| 206 | char *pReadBuff = NULL; |
| 207 | |
| 208 | fd = open( pFileName, O_RDWR ); |
| 209 | |
| 210 | if( fd >= 0 ) { |
| 211 | /* |
| 212 | * calcurate file size |
| 213 | */ |
| 214 | sz_file = lseek( fd, 0, SEEK_END ); |
| 215 | |
| 216 | /* |
| 217 | * prefare the buffer to read file |
| 218 | */ |
| 219 | pReadBuff = malloc(sz_file + 1); // null terminated |
| 220 | |
| 221 | if( NULL != pReadBuff ) { |
| 222 | /* |
| 223 | * read file |
| 224 | */ |
| 225 | memset( pReadBuff, 0, sz_file + 1); |
| 226 | lseek( fd, 0, SEEK_SET ); |
| 227 | read( fd, pReadBuff, sz_file ); |
| 228 | |
| 229 | if(sz_file >= (positionStart+newValueLength)) { |
| 230 | lseek( fd, positionStart, SEEK_SET ); |
| 231 | write( fd, pNewValue, newValueLength ); |
| 232 | } else { |
| 233 | /* |
| 234 | * insert with new length value buffer |
| 235 | */ |
| 236 | wfc_util_log_error("wfc_util_fset_buffer : file size(%d) is less than to write position(%d)", (int)sz_file, (positionStart+newValueLength)); |
| 237 | // TODO: |
| 238 | } |
| 239 | |
| 240 | free(pReadBuff); |
| 241 | } else { |
| 242 | wfc_util_log_error("wfc_util_fset_buffer : can not malloc(%d)", (int)sz_file); |
| 243 | } |
| 244 | |
| 245 | if ( -1 == fsync( fd ) ) { |
| 246 | wfc_util_log_error("wfc_util_fset_buffer : fail to fsync()"); |
| 247 | } |
| 248 | |
| 249 | close( fd ); |
| 250 | } else { |
| 251 | wfc_util_log_error("wfc_util_fset_buffer : can not open file"); |
| 252 | } |
| 253 | |
| 254 | return; |
| 255 | } |
| 256 | |
| 257 | /* |
| 258 | * wfc_util_fget_buffer |
| 259 | * |
| 260 | * return : it will return the length of the stored buffer value if procedure is success |
| 261 | * or will return 0 if not. |
| 262 | */ |
| 263 | int wfc_util_fget_buffer(char *pFileName, int positionStart, int lengthToRead, unsigned char *pValueBuff, int buffLength) |
| 264 | { |
| 265 | int result = 0; |
| 266 | int fd; |
| 267 | off_t sz_file; |
| 268 | char *pReadBuff = NULL; |
| 269 | char *pSValuePointer = NULL, *pETagPointer = NULL; |
| 270 | |
| 271 | fd = open( pFileName, O_RDONLY ); |
| 272 | |
| 273 | if( fd >= 0 ) { |
| 274 | /* |
| 275 | * calcurate file size |
| 276 | */ |
| 277 | sz_file = lseek( fd, 0, SEEK_END ); |
| 278 | |
| 279 | if(sz_file >= (positionStart+lengthToRead)) { |
| 280 | /* |
| 281 | * prefare the buffer to read file |
| 282 | */ |
| 283 | pReadBuff = malloc(sz_file + 1); // null terminated |
| 284 | |
| 285 | if( NULL != pReadBuff ) { |
| 286 | /* |
| 287 | * read file |
| 288 | */ |
| 289 | memset( pReadBuff, 0, sz_file + 1 ); |
| 290 | lseek( fd, 0, SEEK_SET ); |
| 291 | read( fd, pReadBuff, sz_file ); |
| 292 | |
| 293 | /* |
| 294 | * calculate the start buffer pointer |
| 295 | */ |
| 296 | pSValuePointer = pReadBuff + positionStart; |
| 297 | |
| 298 | /* |
| 299 | * calculate the end buffer pointer |
| 300 | */ |
| 301 | pETagPointer = pSValuePointer + lengthToRead; |
| 302 | |
| 303 | /* |
| 304 | * read the string value |
| 305 | */ |
| 306 | if( buffLength >= (int)(pETagPointer-pSValuePointer) ) { |
| 307 | memset( pValueBuff, 0, buffLength ); |
| 308 | memcpy( pValueBuff, pSValuePointer, (int)(pETagPointer-pSValuePointer) ); |
| 309 | result = (int)(pETagPointer-pSValuePointer); |
| 310 | } else { |
| 311 | wfc_util_log_error("wfc_util_fget_buffer : not enough string value buffer(%d)", (int)(pETagPointer-pSValuePointer)); |
| 312 | } |
| 313 | |
| 314 | free(pReadBuff); |
| 315 | } else { |
| 316 | wfc_util_log_error("wfc_util_fget_buffer : can not malloc(%d)", (int)sz_file); |
| 317 | } |
| 318 | } else { |
| 319 | wfc_util_log_error("wfc_util_fget_buffer : file size(%d) is less than to read position(%d)", (int)sz_file, (positionStart+lengthToRead)); |
| 320 | } |
| 321 | close( fd ); |
| 322 | } else { |
| 323 | wfc_util_log_error("wfc_util_fget_buffer : can not open file"); |
| 324 | } |
| 325 | |
| 326 | return result; |
| 327 | } |
| 328 | |
| 329 | /* |
| 330 | * wfc_util_fset_string |
| 331 | * |
| 332 | * The following format string will be added or updated to the file pFileName. |
| 333 | * [pSTagString][pNewValueString][pETagString] |
| 334 | * |
| 335 | * pFileName : file name and path |
| 336 | * pEndOfCfg : tag string to notify the end of configuration file |
| 337 | * pSTagString : tag string to notify purpose of the value |
| 338 | * pETagString : tag string to notify the end of the value |
| 339 | * pNewValueString : string to set for pSTagString |
| 340 | * |
| 341 | * return : void |
| 342 | */ |
| 343 | void wfc_util_fset_string(char *pFileName, char *pEndOfCfg, char *pSTagString, char *pETagString, char *pNewValueString) |
| 344 | { |
| 345 | int fd; |
| 346 | off_t sz_file; |
| 347 | int sz_NewValueBuff = 0; |
| 348 | char *pReadBuff = NULL, *pNewValueBuff = NULL; |
| 349 | char *pSPointer = NULL, *pETagPointer = NULL, *pSValuePointer = NULL; |
| 350 | |
| 351 | fd = open( pFileName, O_RDWR ); |
| 352 | |
| 353 | if( fd >= 0 ) { |
| 354 | /* |
| 355 | * calcurate file size |
| 356 | */ |
| 357 | sz_file = lseek( fd, 0, SEEK_END ); |
| 358 | |
| 359 | /* |
| 360 | * prefare the buffer to read file |
| 361 | */ |
| 362 | if (sz_file > 0) |
| 363 | pReadBuff = malloc(sz_file + 1); // null terminated |
| 364 | |
| 365 | if( NULL != pReadBuff ) { |
| 366 | /* |
| 367 | * read file |
| 368 | */ |
| 369 | memset( pReadBuff, 0x00, sz_file + 1); |
| 370 | if(lseek(fd, 0, SEEK_SET) != 0) { |
| 371 | wfc_util_log_error("lseek failure"); |
| 372 | } |
| 373 | read( fd, pReadBuff, sz_file ); |
| 374 | |
| 375 | /* WBT fix, make sure it is terminated with \0 */ |
| 376 | pReadBuff[sz_file] = '\0'; |
| 377 | |
| 378 | /* |
| 379 | * find TAG string |
| 380 | */ |
| 381 | pSPointer = strstr(pReadBuff, pSTagString); |
| 382 | |
| 383 | if(NULL != pSPointer) { |
| 384 | /* |
| 385 | * find END OF LINE string |
| 386 | */ |
| 387 | pETagPointer = strstr(pSPointer, pETagString); |
| 388 | |
| 389 | if(NULL != pETagPointer) { |
| 390 | /* |
| 391 | * write the new string value |
| 392 | */ |
| 393 | pSValuePointer = pSPointer+strlen(pSTagString); |
| 394 | if(strlen(pNewValueString) == (unsigned int)(pETagPointer-pSValuePointer)) { |
| 395 | lseek( fd, (int)(pSValuePointer-pReadBuff), SEEK_SET ); |
| 396 | write( fd, pNewValueString, strlen(pNewValueString)); |
| 397 | } else { |
| 398 | /* |
| 399 | * insert with new length value string |
| 400 | */ |
| 401 | wfc_util_fupdate_string(fd, &pReadBuff, pETagPointer, pSValuePointer, pNewValueString); |
| 402 | } |
| 403 | } else { |
| 404 | wfc_util_log_error("wfc_util_fset_string : can not find End TAG"); |
| 405 | } |
| 406 | } else { |
| 407 | /* |
| 408 | * "\n""[Start TAG][String Value][End TAG]""\n" |
| 409 | */ |
| 410 | sz_NewValueBuff = strlen(pSTagString) + |
| 411 | strlen(pNewValueString) + |
| 412 | strlen(pETagString) + |
| 413 | 2 + 1; |
| 414 | pNewValueBuff = malloc( sz_NewValueBuff); |
| 415 | |
| 416 | if( NULL != pNewValueBuff ) { |
| 417 | /* |
| 418 | * prefare the new string to insert |
| 419 | */ |
| 420 | memset( pNewValueBuff, 0, sz_NewValueBuff ); |
| 421 | sprintf( pNewValueBuff, "%c%s%s%s%c", '\n', pSTagString, pNewValueString, pETagString,'\n' ); |
| 422 | |
| 423 | /* |
| 424 | * insert new string to the file |
| 425 | */ |
| 426 | wfc_util_finsert_new_string(fd, &pReadBuff, pNewValueBuff, pEndOfCfg); |
| 427 | |
| 428 | free( pNewValueBuff ); |
| 429 | } else { |
| 430 | wfc_util_log_error("wfc_util_fset_string : can not malloc(%d)", (int)sz_file); |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | free(pReadBuff); |
| 435 | } else { |
| 436 | wfc_util_log_error("wfc_util_fset_string : can not malloc(%d)", (int)sz_file); |
| 437 | } |
| 438 | |
| 439 | if ( -1 == fsync( fd ) ) { |
| 440 | wfc_util_log_error("wfc_util_fset_string : fail to fsync()"); |
| 441 | } |
| 442 | |
| 443 | close( fd ); |
| 444 | } else { |
| 445 | wfc_util_log_error("wfc_util_fset_string : can not open file"); |
| 446 | } |
| 447 | |
| 448 | return; |
| 449 | } |
| 450 | |
| 451 | /* |
| 452 | * wfc_util_fget_string |
| 453 | * |
| 454 | * Read value from the following format string in the file pFileName. |
| 455 | * [pSTagString][string value to read][pETagString] |
| 456 | * |
| 457 | * pFileName : file name and path |
| 458 | * pEndOfCfg : tag string to notify the end of configuration file |
| 459 | * pSTagString : tag string to notify purpose of the value |
| 460 | * pETagString : tag string to notify the end of the value |
| 461 | * pValueStringBuff : string buffer to get string value |
| 462 | * stringBuffLength : the length of pValueStringBuff |
| 463 | * |
| 464 | * return : it will return the length of the stored string value if procedure is success |
| 465 | * or will return 0 if not. |
| 466 | */ |
| 467 | int wfc_util_fget_string(char *pFileName, char *pEndOfCfg, char *pSTagString, char *pETagString, char *pValueStringBuff, int stringBuffLength) |
| 468 | { |
| 469 | int result = 0; |
| 470 | int fd; |
| 471 | off_t sz_file; |
| 472 | char *pReadBuff = NULL; |
| 473 | char *pSPointer = NULL, *pETagPointer = NULL, *pSValuePointer = NULL; |
| 474 | |
| 475 | /* unused parameter*/ |
| 476 | pEndOfCfg = pEndOfCfg; |
| 477 | |
| 478 | fd = open( pFileName, O_RDONLY ); |
| 479 | |
| 480 | if( fd >= 0 ) { |
| 481 | /* |
| 482 | * calcurate file size |
| 483 | */ |
| 484 | sz_file = lseek( fd, 0, SEEK_END ); |
| 485 | |
| 486 | /* |
| 487 | * prefare the buffer to read file |
| 488 | */ |
| 489 | if (sz_file > 0) // skip when value is 0 |
| 490 | pReadBuff = malloc(sz_file + 1); |
| 491 | |
| 492 | if( NULL != pReadBuff ) { |
| 493 | /* |
| 494 | * read file |
| 495 | */ |
| 496 | memset( pReadBuff, 0, sz_file + 1); |
| 497 | if(lseek(fd, 0, SEEK_SET) != 0) { |
| 498 | wfc_util_log_error("lseek failure"); |
| 499 | } |
| 500 | read( fd, pReadBuff, sz_file ); |
| 501 | |
| 502 | /* WBT fix, make sure it is terminated with \0 */ |
| 503 | pReadBuff[sz_file] = '\0'; |
| 504 | |
| 505 | /* |
| 506 | * find TAG string |
| 507 | */ |
| 508 | pSPointer = strstr( pReadBuff, pSTagString ); |
| 509 | |
| 510 | if( NULL != pSPointer ) { |
| 511 | /* |
| 512 | * find END OF LINE string |
| 513 | */ |
| 514 | pETagPointer = strstr(pSPointer, pETagString); |
| 515 | |
| 516 | if( NULL != pETagPointer ) { |
| 517 | /* |
| 518 | * read the string value |
| 519 | */ |
| 520 | pSValuePointer = pSPointer+strlen(pSTagString); |
| 521 | if( stringBuffLength >= (int)(pETagPointer-pSValuePointer) ) { |
| 522 | memset( pValueStringBuff, 0, stringBuffLength ); |
| 523 | memcpy( pValueStringBuff, pSValuePointer, (int)(pETagPointer-pSValuePointer) ); |
| 524 | result = (int)(pETagPointer-pSValuePointer); |
| 525 | } else { |
| 526 | wfc_util_log_error("wfc_util_fget_string : not enough string value buffer(%d)", (int)(pETagPointer-pSValuePointer)); |
| 527 | } |
| 528 | } else { |
| 529 | wfc_util_log_error("wfc_util_fget_string : can not find End TAG"); |
| 530 | } |
| 531 | } else { |
| 532 | wfc_util_log_error("wfc_util_fget_string : can not find Start TAG"); |
| 533 | } |
| 534 | free(pReadBuff); |
| 535 | } else { |
| 536 | wfc_util_log_error("wfc_util_fget_string : can not malloc(%d)", (int)sz_file); |
| 537 | } |
| 538 | close( fd ); |
| 539 | } else { |
| 540 | wfc_util_log_error("wfc_util_fget_string : can not open file"); |
| 541 | } |
| 542 | |
| 543 | return result; |
| 544 | } |
| 545 | |
| 546 | /* |
| 547 | * wfc_util_ffile_check |
| 548 | * |
| 549 | * check whether pDestFName file exist or not |
| 550 | * |
| 551 | * pFileName : file name and path |
| 552 | * access_mode : R_OK | W_OK | X_OK | F_OK |
| 553 | * |
| 554 | * return : it will return 0 if the file exist |
| 555 | * or will return -1 if not. |
| 556 | */ |
| 557 | int wfc_util_ffile_check(char *pDestFName, int access_mode) |
| 558 | { |
| 559 | struct stat st; |
| 560 | |
| 561 | if (access(pDestFName, access_mode) == 0) { |
| 562 | if( stat( pDestFName, &st ) < 0 ) { |
| 563 | wfc_util_log_error("Cannot stat the file \"%s\": %s", pDestFName, strerror(errno)); |
| 564 | return -1; |
| 565 | } |
| 566 | //check if config file has some data or is it empty due to previous errors |
| 567 | if( st.st_size ) { |
| 568 | return 0; |
| 569 | } |
| 570 | } else { |
| 571 | wfc_util_log_error("Cannot access \"%s\": %s", pDestFName, strerror(errno)); |
| 572 | } |
| 573 | |
| 574 | return -1; |
| 575 | } |
| 576 | |
| 577 | /* |
| 578 | * wfc_util_ffile_check_copy |
| 579 | * |
| 580 | * check whether pDestFName file exist if not it will copy from pSourceFName file |
| 581 | * |
| 582 | * return : it will return 0 if procedure is success |
| 583 | * or will return -1 if not. |
| 584 | */ |
| 585 | int wfc_util_ffile_check_copy(char *pDestFName, char *pSourceFName, mode_t mode, uid_t uID, gid_t gID) |
| 586 | { |
| 587 | #define WFC_BUFFER_SIZE 2048 |
| 588 | char buf[WFC_BUFFER_SIZE] = {0}; // Null terminated |
| 589 | int srcfd, destfd; |
| 590 | int nread; |
| 591 | struct stat st; |
| 592 | |
| 593 | if (access(pDestFName, R_OK|W_OK) == 0) { |
| 594 | if( stat( pDestFName, &st ) < 0 ) { |
| 595 | wfc_util_log_error("Cannot stat the file \"%s\": %s", pDestFName, strerror(errno)); |
| 596 | return -1; |
| 597 | } |
| 598 | //check if config file has some data or is it empty due to previous errors |
| 599 | if( st.st_size ) { |
| 600 | return 0; |
| 601 | } |
| 602 | //else continue to write the config from default template. |
| 603 | } else if (errno != ENOENT) { |
| 604 | wfc_util_log_error("Cannot access \"%s\": %s", pDestFName, strerror(errno)); |
| 605 | return -1; |
| 606 | } |
| 607 | |
| 608 | srcfd = open(pSourceFName, O_RDONLY); |
| 609 | if (srcfd < 0) { |
| 610 | wfc_util_log_error("Cannot open \"%s\": %s", pSourceFName, strerror(errno)); |
| 611 | return -1; |
| 612 | } |
| 613 | |
| 614 | destfd = open(pDestFName, O_CREAT|O_WRONLY, mode); |
| 615 | if (destfd < 0) { |
| 616 | close(srcfd); |
| 617 | wfc_util_log_error("Cannot create \"%s\": %s", pDestFName, strerror(errno)); |
| 618 | return -1; |
| 619 | } |
| 620 | |
| 621 | while ((nread = read(srcfd, buf, WFC_BUFFER_SIZE-1)) != 0) { |
| 622 | if (nread < 0) { |
| 623 | wfc_util_log_error("Error reading \"%s\": %s", pSourceFName, strerror(errno)); |
| 624 | close(srcfd); |
| 625 | close(destfd); |
| 626 | unlink(pDestFName); |
| 627 | return -1; |
| 628 | } |
| 629 | // WBT fix, according to manual, the number of bytes read can't be bigger than read_size. I don't know why WBT complains for this. |
| 630 | if (nread < WFC_BUFFER_SIZE) |
| 631 | buf[nread] = '\0'; |
| 632 | else { |
| 633 | buf[WFC_BUFFER_SIZE-1] = '\0'; |
| 634 | nread = WFC_BUFFER_SIZE-1; |
| 635 | } |
| 636 | write(destfd, buf, nread); |
| 637 | } |
| 638 | |
| 639 | close(destfd); |
| 640 | close(srcfd); |
| 641 | |
| 642 | /* remove this code because of permission problem when it is accessed from "atd" having system permission. */ |
| 643 | { |
| 644 | #ifndef CONFIG_LGE_WLAN_WIFI_PATCH |
| 645 | uid_t uid = getuid(); |
| 646 | gid_t gid = getgid(); |
| 647 | wfc_util_log_error("Error changing group ownership (%d) of %s to %d: %s", gid, pDestFName, gID, strerror(errno)); |
| 648 | if (0 == uid) { |
| 649 | #endif /* CONFIG_LGE_WLAN_WIFI_PATCH */ |
| 650 | if (chown(pDestFName, uID, gID) < 0) { |
| 651 | wfc_util_log_error("Error changing group ownership of %s to %d: %s", pDestFName, gID, strerror(errno)); |
| 652 | unlink(pDestFName); |
| 653 | return -1; |
| 654 | } |
| 655 | #ifndef CONFIG_LGE_WLAN_WIFI_PATCH |
| 656 | } else { |
| 657 | wfc_util_log_error("wfc_util_ffile_check_copy : we can not excute chown[uid = %d, gid = %d]", uid, getgid()); |
| 658 | } |
| 659 | #endif /* CONFIG_LGE_WLAN_WIFI_PATCH */ |
| 660 | } |
| 661 | |
| 662 | return 0; |
| 663 | } |
| 664 | |