| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * abook_local_file.php |
| 5 | * |
| 6 | * @copyright © 1999-2007 The SquirrelMail Project Team |
| 7 | * @license http://opensource.org/licenses/gpl-license.php GNU Public License |
| 8 | * @version $Id$ |
| 9 | * @package squirrelmail |
| 10 | * @subpackage addressbook |
| 11 | */ |
| 12 | |
| 13 | /** |
| 14 | * Backend for address book as a pipe separated file |
| 15 | * |
| 16 | * Stores the address book in a local file |
| 17 | * |
| 18 | * An array with the following elements must be passed to |
| 19 | * the class constructor (elements marked ? are optional): |
| 20 | *<pre> |
| 21 | * filename => path to addressbook file |
| 22 | * ? create => if true: file is created if it does not exist. |
| 23 | * ? umask => umask set before opening file. |
| 24 | * ? name => name of address book. |
| 25 | * ? detect_writeable => detect address book access permissions by |
| 26 | * checking file permissions. |
| 27 | * ? writeable => allow writing into address book. Used only when |
| 28 | * detect_writeable is set to false. |
| 29 | * ? listing => enable/disable listing |
| 30 | *</pre> |
| 31 | * NOTE. This class should not be used directly. Use the |
| 32 | * "AddressBook" class instead. |
| 33 | * @package squirrelmail |
| 34 | */ |
| 35 | class abook_local_file extends addressbook_backend { |
| 36 | /** |
| 37 | * Backend type |
| 38 | * @var string |
| 39 | */ |
| 40 | var $btype = 'local'; |
| 41 | /** |
| 42 | * Backend name |
| 43 | * @var string |
| 44 | */ |
| 45 | var $bname = 'local_file'; |
| 46 | |
| 47 | /** |
| 48 | * File used to store data |
| 49 | * @var string |
| 50 | */ |
| 51 | var $filename = ''; |
| 52 | /** |
| 53 | * File handle |
| 54 | * @var object |
| 55 | */ |
| 56 | var $filehandle = 0; |
| 57 | /** |
| 58 | * Create file, if it not present |
| 59 | * @var bool |
| 60 | */ |
| 61 | var $create = false; |
| 62 | /** |
| 63 | * Detect, if address book is writeable by checking file permisions |
| 64 | * @var bool |
| 65 | */ |
| 66 | var $detect_writeable = true; |
| 67 | /** |
| 68 | * Control write access to address book |
| 69 | * |
| 70 | * Option does not have any effect, if 'detect_writeable' is 'true' |
| 71 | * @var bool |
| 72 | */ |
| 73 | var $writeable = false; |
| 74 | /** |
| 75 | * controls listing of address book |
| 76 | * @var bool |
| 77 | */ |
| 78 | var $listing = true; |
| 79 | /** |
| 80 | * Umask of the file |
| 81 | * @var string |
| 82 | */ |
| 83 | var $umask; |
| 84 | /** |
| 85 | * Sets max entry size (number of bytes used for all address book fields |
| 86 | * (including escapes) + 4 delimiters + 1 linefeed) |
| 87 | * @var integer |
| 88 | * @since 1.5.2 |
| 89 | */ |
| 90 | var $line_length = 2048; |
| 91 | |
| 92 | /* ========================== Private ======================= */ |
| 93 | |
| 94 | /** |
| 95 | * Constructor |
| 96 | * @param array $param backend options |
| 97 | * @return bool |
| 98 | */ |
| 99 | function abook_local_file($param) { |
| 100 | $this->sname = _("Personal Address Book"); |
| 101 | $this->umask = Umask(); |
| 102 | |
| 103 | if(is_array($param)) { |
| 104 | if(empty($param['filename'])) { |
| 105 | return $this->set_error('Invalid parameters'); |
| 106 | } |
| 107 | if(!is_string($param['filename'])) { |
| 108 | return $this->set_error($param['filename'] . ': '. |
| 109 | _("Not a file name")); |
| 110 | } |
| 111 | |
| 112 | $this->filename = $param['filename']; |
| 113 | |
| 114 | if(isset($param['create'])) { |
| 115 | $this->create = $param['create']; |
| 116 | } |
| 117 | if(isset($param['umask'])) { |
| 118 | $this->umask = $param['umask']; |
| 119 | } |
| 120 | if(isset($param['name'])) { |
| 121 | $this->sname = $param['name']; |
| 122 | } |
| 123 | if(isset($param['detect_writeable'])) { |
| 124 | $this->detect_writeable = $param['detect_writeable']; |
| 125 | } |
| 126 | if(!empty($param['writeable'])) { |
| 127 | $this->writeable = $param['writeable']; |
| 128 | } |
| 129 | if(isset($param['listing'])) { |
| 130 | $this->listing = $param['listing']; |
| 131 | } |
| 132 | if(isset($param['line_length']) && ! empty($param['line_length'])) { |
| 133 | $this->line_length = (int) $param['line_length']; |
| 134 | } |
| 135 | |
| 136 | $this->open(true); |
| 137 | } else { |
| 138 | $this->set_error('Invalid argument to constructor'); |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * Open the addressbook file and store the file pointer. |
| 144 | * Use $file as the file to open, or the class' own |
| 145 | * filename property. If $param is empty and file is |
| 146 | * open, do nothing. |
| 147 | * @param bool $new is file already opened |
| 148 | * @return bool |
| 149 | */ |
| 150 | function open($new = false) { |
| 151 | $this->error = ''; |
| 152 | $file = $this->filename; |
| 153 | $create = $this->create; |
| 154 | $fopenmode = (($this->writeable && sq_is_writable($file)) ? 'a+' : 'r'); |
| 155 | |
| 156 | /* Return true is file is open and $new is unset */ |
| 157 | if($this->filehandle && !$new) { |
| 158 | return true; |
| 159 | } |
| 160 | |
| 161 | /* Check that new file exitsts */ |
| 162 | if((!(file_exists($file) && is_readable($file))) && !$create) { |
| 163 | return $this->set_error("$file: " . _("No such file or directory")); |
| 164 | } |
| 165 | |
| 166 | /* Close old file, if any */ |
| 167 | if($this->filehandle) { $this->close(); } |
| 168 | |
| 169 | umask($this->umask); |
| 170 | if (! $this->detect_writeable) { |
| 171 | $fh = @fopen($file,$fopenmode); |
| 172 | if ($fh) { |
| 173 | $this->filehandle = &$fh; |
| 174 | $this->filename = $file; |
| 175 | } else { |
| 176 | return $this->set_error("$file: " . _("Open failed")); |
| 177 | } |
| 178 | } else { |
| 179 | /* Open file. First try to open for reading and writing, |
| 180 | * but fall back to read only. */ |
| 181 | $fh = @fopen($file, 'a+'); |
| 182 | if($fh) { |
| 183 | $this->filehandle = &$fh; |
| 184 | $this->filename = $file; |
| 185 | $this->writeable = true; |
| 186 | } else { |
| 187 | $fh = @fopen($file, 'r'); |
| 188 | if($fh) { |
| 189 | $this->filehandle = &$fh; |
| 190 | $this->filename = $file; |
| 191 | $this->writeable = false; |
| 192 | } else { |
| 193 | return $this->set_error("$file: " . _("Open failed")); |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | return true; |
| 198 | } |
| 199 | |
| 200 | /** Close the file and forget the filehandle */ |
| 201 | function close() { |
| 202 | @fclose($this->filehandle); |
| 203 | $this->filehandle = 0; |
| 204 | $this->filename = ''; |
| 205 | $this->writable = false; |
| 206 | } |
| 207 | |
| 208 | /** Lock the datafile - try 20 times in 5 seconds */ |
| 209 | function lock() { |
| 210 | for($i = 0 ; $i < 20 ; $i++) { |
| 211 | if(flock($this->filehandle, 2 + 4)) |
| 212 | return true; |
| 213 | else |
| 214 | usleep(250000); |
| 215 | } |
| 216 | return false; |
| 217 | } |
| 218 | |
| 219 | /** Unlock the datafile */ |
| 220 | function unlock() { |
| 221 | return flock($this->filehandle, 3); |
| 222 | } |
| 223 | |
| 224 | /** |
| 225 | * Overwrite the file with data from $rows |
| 226 | * NOTE! Previous locks are broken by this function |
| 227 | * @param array $rows new data |
| 228 | * @return bool |
| 229 | */ |
| 230 | function overwrite(&$rows) { |
| 231 | $this->unlock(); |
| 232 | $newfh = @fopen($this->filename.'.tmp', 'w'); |
| 233 | |
| 234 | if(!$newfh) { |
| 235 | return $this->set_error($this->filename. '.tmp:' . _("Open failed")); |
| 236 | } |
| 237 | |
| 238 | for($i = 0, $cnt=sizeof($rows) ; $i < $cnt ; $i++) { |
| 239 | if(is_array($rows[$i])) { |
| 240 | for($j = 0, $cnt_part=count($rows[$i]) ; $j < $cnt_part ; $j++) { |
| 241 | $rows[$i][$j] = $this->quotevalue($rows[$i][$j]); |
| 242 | } |
| 243 | $tmpwrite = sq_fwrite($newfh, join('|', $rows[$i]) . "\n"); |
| 244 | if ($tmpwrite === FALSE) { |
| 245 | return $this->set_error($this->filename . '.tmp:' . _("Write failed")); |
| 246 | } |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | fclose($newfh); |
| 251 | if (!@copy($this->filename . '.tmp' , $this->filename)) { |
| 252 | return $this->set_error($this->filename . ':' . _("Unable to update")); |
| 253 | } |
| 254 | @unlink($this->filename . '.tmp'); |
| 255 | @chmod($this->filename, 0600); |
| 256 | $this->unlock(); |
| 257 | $this->open(true); |
| 258 | return true; |
| 259 | } |
| 260 | |
| 261 | /* ========================== Public ======================== */ |
| 262 | |
| 263 | /** |
| 264 | * Search the file |
| 265 | * @param string $expr search expression |
| 266 | * @return array search results |
| 267 | */ |
| 268 | function search($expr) { |
| 269 | |
| 270 | /* To be replaced by advanded search expression parsing */ |
| 271 | if(is_array($expr)) { return; } |
| 272 | |
| 273 | // don't allow wide search when listing is disabled. |
| 274 | if ($expr=='*' && ! $this->listing) |
| 275 | return array(); |
| 276 | |
| 277 | /* Make regexp from glob'ed expression |
| 278 | * May want to quote other special characters like (, ), -, [, ], etc. */ |
| 279 | $expr = str_replace('?', '.', $expr); |
| 280 | $expr = str_replace('*', '.*', $expr); |
| 281 | |
| 282 | $res = array(); |
| 283 | if(!$this->open()) { |
| 284 | return false; |
| 285 | } |
| 286 | @rewind($this->filehandle); |
| 287 | |
| 288 | while ($row = @fgetcsv($this->filehandle, $this->line_length, '|')) { |
| 289 | if (count($row)<5) { |
| 290 | /** |
| 291 | * address book is corrupted. |
| 292 | */ |
| 293 | global $oTemplate; |
| 294 | error_box(_("Address book is corrupted. Required fields are missing.")); |
| 295 | $oTemplate->display('footer.tpl'); |
| 296 | die(); |
| 297 | } else { |
| 298 | $line = join(' ', $row); |
| 299 | /** |
| 300 | * TODO: regexp search is supported only in local_file backend. |
| 301 | * Do we check format of regexp or ignore errors? |
| 302 | */ |
| 303 | // errors on eregi call are suppressed in order to prevent display of regexp compilation errors |
| 304 | if(@eregi($expr, $line)) { |
| 305 | array_push($res, array('nickname' => $row[0], |
| 306 | 'name' => $this->fullname($row[1], $row[2]), |
| 307 | 'firstname' => $row[1], |
| 308 | 'lastname' => $row[2], |
| 309 | 'email' => $row[3], |
| 310 | 'label' => $row[4], |
| 311 | 'backend' => $this->bnum, |
| 312 | 'source' => &$this->sname)); |
| 313 | } |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | return $res; |
| 318 | } |
| 319 | |
| 320 | /** |
| 321 | * Lookup an address by the indicated field. |
| 322 | * |
| 323 | * @param string $value The value to look up |
| 324 | * @param integer $field The field to look in, should be one |
| 325 | * of the SM_ABOOK_FIELD_* constants |
| 326 | * defined in include/constants.php |
| 327 | * (OPTIONAL; defaults to nickname field) |
| 328 | * NOTE: uniqueness is only guaranteed |
| 329 | * when the nickname field is used here; |
| 330 | * otherwise, the first matching address |
| 331 | * is returned. |
| 332 | * |
| 333 | * @return array Array with lookup results when the value |
| 334 | * was found, an empty array if the value was |
| 335 | * not found. |
| 336 | * |
| 337 | */ |
| 338 | function lookup($value, $field=SM_ABOOK_FIELD_NICKNAME) { |
| 339 | if(empty($value)) { |
| 340 | return array(); |
| 341 | } |
| 342 | |
| 343 | $value = strtolower($value); |
| 344 | |
| 345 | $this->open(); |
| 346 | @rewind($this->filehandle); |
| 347 | |
| 348 | while ($row = @fgetcsv($this->filehandle, $this->line_length, '|')) { |
| 349 | if (count($row)<5) { |
| 350 | /** |
| 351 | * address book is corrupted. |
| 352 | */ |
| 353 | global $oTemplate; |
| 354 | error_box(_("Address book is corrupted. Required fields are missing.")); |
| 355 | $oTemplate->display('footer.tpl'); |
| 356 | die(); |
| 357 | } else { |
| 358 | if(strtolower($row[$field]) == $value) { |
| 359 | return array('nickname' => $row[0], |
| 360 | 'name' => $this->fullname($row[1], $row[2]), |
| 361 | 'firstname' => $row[1], |
| 362 | 'lastname' => $row[2], |
| 363 | 'email' => $row[3], |
| 364 | 'label' => $row[4], |
| 365 | 'backend' => $this->bnum, |
| 366 | 'source' => &$this->sname); |
| 367 | } |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | return array(); |
| 372 | } |
| 373 | |
| 374 | /** |
| 375 | * List all addresses |
| 376 | * @return array list of all addresses |
| 377 | */ |
| 378 | function list_addr() { |
| 379 | $res = array(); |
| 380 | |
| 381 | if(isset($this->listing) && !$this->listing) { |
| 382 | return array(); |
| 383 | } |
| 384 | |
| 385 | $this->open(); |
| 386 | @rewind($this->filehandle); |
| 387 | |
| 388 | while ($row = @fgetcsv($this->filehandle, $this->line_length, '|')) { |
| 389 | if (count($row)<5) { |
| 390 | /** |
| 391 | * address book is corrupted. Don't be nice to people that |
| 392 | * violate address book formating. |
| 393 | */ |
| 394 | global $oTemplate; |
| 395 | error_box(_("Address book is corrupted. Required fields are missing.")); |
| 396 | $oTemplate->display('footer.tpl'); |
| 397 | die(); |
| 398 | } else { |
| 399 | array_push($res, array('nickname' => $row[0], |
| 400 | 'name' => $this->fullname($row[1], $row[2]), |
| 401 | 'firstname' => $row[1], |
| 402 | 'lastname' => $row[2], |
| 403 | 'email' => $row[3], |
| 404 | 'label' => $row[4], |
| 405 | 'backend' => $this->bnum, |
| 406 | 'source' => &$this->sname)); |
| 407 | } |
| 408 | } |
| 409 | return $res; |
| 410 | } |
| 411 | |
| 412 | /** |
| 413 | * Add address |
| 414 | * @param array $userdata new data |
| 415 | * @return bool |
| 416 | */ |
| 417 | function add($userdata) { |
| 418 | if(!$this->writeable) { |
| 419 | return $this->set_error(_("Address book is read-only")); |
| 420 | } |
| 421 | /* See if user exists already */ |
| 422 | $ret = $this->lookup($userdata['nickname']); |
| 423 | if(!empty($ret)) { |
| 424 | // i18n: don't use html formating in translation |
| 425 | return $this->set_error(sprintf(_("User \"%s\" already exists"),$ret['nickname'])); |
| 426 | } |
| 427 | |
| 428 | /* Here is the data to write */ |
| 429 | $data = $this->quotevalue($userdata['nickname']) . '|' . |
| 430 | $this->quotevalue($userdata['firstname']) . '|' . |
| 431 | $this->quotevalue((!empty($userdata['lastname'])?$userdata['lastname']:'')) . '|' . |
| 432 | $this->quotevalue($userdata['email']) . '|' . |
| 433 | $this->quotevalue((!empty($userdata['label'])?$userdata['label']:'')); |
| 434 | |
| 435 | /* Strip linefeeds */ |
| 436 | $data = ereg_replace("[\r\n]", ' ', $data); |
| 437 | |
| 438 | /** |
| 439 | * Make sure that entry fits into allocated record space. |
| 440 | * One byte is reserved for linefeed |
| 441 | */ |
| 442 | if (strlen($data) >= $this->line_length) { |
| 443 | return $this->set_error(_("Address book entry is too big")); |
| 444 | } |
| 445 | |
| 446 | /* Add linefeed at end */ |
| 447 | $data = $data . "\n"; |
| 448 | |
| 449 | /* Reopen file, just to be sure */ |
| 450 | $this->open(true); |
| 451 | if(!$this->writeable) { |
| 452 | return $this->set_error(_("Address book is read-only")); |
| 453 | } |
| 454 | |
| 455 | /* Lock the file */ |
| 456 | if(!$this->lock()) { |
| 457 | return $this->set_error(_("Could not lock datafile")); |
| 458 | } |
| 459 | |
| 460 | /* Write */ |
| 461 | $r = sq_fwrite($this->filehandle, $data); |
| 462 | |
| 463 | /* Unlock file */ |
| 464 | $this->unlock(); |
| 465 | |
| 466 | /* Test write result */ |
| 467 | if($r === FALSE) { |
| 468 | /* Fail */ |
| 469 | $this->set_error(_("Write to address book failed")); |
| 470 | return FALSE; |
| 471 | } |
| 472 | |
| 473 | return TRUE; |
| 474 | } |
| 475 | |
| 476 | /** |
| 477 | * Delete address |
| 478 | * @param string $alias alias that has to be deleted |
| 479 | * @return bool |
| 480 | */ |
| 481 | function remove($alias) { |
| 482 | if(!$this->writeable) { |
| 483 | return $this->set_error(_("Address book is read-only")); |
| 484 | } |
| 485 | |
| 486 | /* Lock the file to make sure we're the only process working |
| 487 | * on it. */ |
| 488 | if(!$this->lock()) { |
| 489 | return $this->set_error(_("Could not lock datafile")); |
| 490 | } |
| 491 | |
| 492 | /* Read file into memory, ignoring nicknames to delete */ |
| 493 | @rewind($this->filehandle); |
| 494 | $i = 0; |
| 495 | $rows = array(); |
| 496 | while($row = @fgetcsv($this->filehandle, $this->line_length, '|')) { |
| 497 | if(!in_array($row[0], $alias)) { |
| 498 | $rows[$i++] = $row; |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | /* Write data back */ |
| 503 | if(!$this->overwrite($rows)) { |
| 504 | $this->unlock(); |
| 505 | return false; |
| 506 | } |
| 507 | |
| 508 | $this->unlock(); |
| 509 | return true; |
| 510 | } |
| 511 | |
| 512 | /** |
| 513 | * Modify address |
| 514 | * @param string $alias modified alias |
| 515 | * @param array $userdata new data |
| 516 | * @return bool true, if operation successful |
| 517 | */ |
| 518 | function modify($alias, $userdata) { |
| 519 | if(!$this->writeable) { |
| 520 | return $this->set_error(_("Address book is read-only")); |
| 521 | } |
| 522 | |
| 523 | /* See if user exists */ |
| 524 | $ret = $this->lookup($alias); |
| 525 | if(empty($ret)) { |
| 526 | // i18n: don't use html formating in translation |
| 527 | return $this->set_error(sprintf(_("User \"%s\" does not exist"),$alias)); |
| 528 | } |
| 529 | |
| 530 | /* If the alias changed, see if the new alias exists */ |
| 531 | if (strtolower($alias) != strtolower($userdata['nickname'])) { |
| 532 | $ret = $this->lookup($userdata['nickname']); |
| 533 | if (!empty($ret)) { |
| 534 | return $this->set_error(sprintf(_("User \"%s\" already exists"), $userdata['nickname'])); |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | /* Lock the file to make sure we're the only process working |
| 539 | * on it. */ |
| 540 | if(!$this->lock()) { |
| 541 | return $this->set_error(_("Could not lock datafile")); |
| 542 | } |
| 543 | |
| 544 | /* calculate userdata size */ |
| 545 | $data = $this->quotevalue($userdata['nickname']) . '|' |
| 546 | . $this->quotevalue($userdata['firstname']) . '|' |
| 547 | . $this->quotevalue((!empty($userdata['lastname'])?$userdata['lastname']:'')) . '|' |
| 548 | . $this->quotevalue($userdata['email']) . '|' |
| 549 | . $this->quotevalue((!empty($userdata['label'])?$userdata['label']:'')); |
| 550 | /* make sure that it fits into allocated space */ |
| 551 | if (strlen($data) >= $this->line_length) { |
| 552 | return $this->set_error(_("Address book entry is too big")); |
| 553 | } |
| 554 | |
| 555 | /* Read file into memory, modifying the data for the |
| 556 | * user identified by $alias */ |
| 557 | $this->open(true); |
| 558 | @rewind($this->filehandle); |
| 559 | $i = 0; |
| 560 | $rows = array(); |
| 561 | while($row = @fgetcsv($this->filehandle, $this->line_length, '|')) { |
| 562 | if(strtolower($row[0]) != strtolower($alias)) { |
| 563 | $rows[$i++] = $row; |
| 564 | } else { |
| 565 | $rows[$i++] = array(0 => $userdata['nickname'], |
| 566 | 1 => $userdata['firstname'], |
| 567 | 2 => (!empty($userdata['lastname'])?$userdata['lastname']:''), |
| 568 | 3 => $userdata['email'], |
| 569 | 4 => (!empty($userdata['label'])?$userdata['label']:'')); |
| 570 | } |
| 571 | } |
| 572 | |
| 573 | /* Write data back */ |
| 574 | if(!$this->overwrite($rows)) { |
| 575 | $this->unlock(); |
| 576 | return false; |
| 577 | } |
| 578 | |
| 579 | $this->unlock(); |
| 580 | return true; |
| 581 | } |
| 582 | |
| 583 | /** |
| 584 | * Function for quoting values before saving |
| 585 | * @param string $value string that has to be quoted |
| 586 | * @param string quoted string |
| 587 | */ |
| 588 | function quotevalue($value) { |
| 589 | /* Quote the field if it contains | or ". Double quotes need to |
| 590 | * be replaced with "" */ |
| 591 | if(ereg("[|\"]", $value)) { |
| 592 | $value = '"' . str_replace('"', '""', $value) . '"'; |
| 593 | } |
| 594 | return $value; |
| 595 | } |
| 596 | } |