1 | <?php |
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2 | /** |
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3 | * Smarty write file plugin |
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4 | * |
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5 | * @package Smarty |
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6 | * @subpackage PluginsInternal |
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7 | * @author Monte Ohrt |
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8 | */ |
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9 | |||
10 | /** |
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11 | * Smarty Internal Write File Class |
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12 | * |
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13 | * @package Smarty |
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14 | * @subpackage PluginsInternal |
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15 | */ |
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16 | class Smarty_Internal_Runtime_WriteFile |
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17 | { |
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18 | /** |
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19 | * Writes file in a safe way to disk |
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20 | * |
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21 | * @param string $_filepath complete filepath |
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22 | * @param string $_contents file content |
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23 | * @param Smarty $smarty smarty instance |
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24 | * |
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25 | * @throws SmartyException |
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26 | * @return boolean true |
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27 | */ |
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28 | public function writeFile($_filepath, $_contents, Smarty $smarty) |
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29 | { |
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30 | $_error_reporting = error_reporting(); |
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31 | error_reporting($_error_reporting & ~E_NOTICE & ~E_WARNING); |
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32 | $_file_perms = property_exists($smarty, '_file_perms') ? $smarty->_file_perms : 0644; |
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33 | $_dir_perms = |
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34 | property_exists($smarty, '_dir_perms') ? (isset($smarty->_dir_perms) ? $smarty->_dir_perms : 0777) : 0771; |
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35 | if ($_file_perms !== null) { |
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36 | $old_umask = umask(0); |
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37 | } |
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38 | $_dirpath = dirname($_filepath); |
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39 | // if subdirs, create dir structure |
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40 | if ($_dirpath !== '.') { |
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41 | $i = 0; |
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42 | // loop if concurrency problem occurs |
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43 | // see https://bugs.php.net/bug.php?id=35326 |
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44 | while (!is_dir($_dirpath)) { |
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45 | if (@mkdir($_dirpath, $_dir_perms, true)) { |
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46 | break; |
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47 | } |
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48 | clearstatcache(); |
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49 | if (++$i === 3) { |
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50 | error_reporting($_error_reporting); |
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51 | throw new SmartyException("unable to create directory {$_dirpath}"); |
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52 | } |
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53 | sleep(1); |
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54 | } |
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55 | } |
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56 | // write to tmp file, then move to overt file lock race condition |
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57 | $_tmp_file = $_dirpath . DIRECTORY_SEPARATOR . str_replace(array('.', ','), '_', uniqid('wrt', true)); |
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58 | if (!file_put_contents($_tmp_file, $_contents)) { |
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59 | error_reporting($_error_reporting); |
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60 | throw new SmartyException("unable to write file {$_tmp_file}"); |
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61 | } |
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62 | /* |
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63 | * Windows' rename() fails if the destination exists, |
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64 | * Linux' rename() properly handles the overwrite. |
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65 | * Simply unlink()ing a file might cause other processes |
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66 | * currently reading that file to fail, but linux' rename() |
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67 | * seems to be smart enough to handle that for us. |
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68 | */ |
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69 | if (Smarty::$_IS_WINDOWS) { |
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70 | // remove original file |
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71 | if (is_file($_filepath)) { |
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72 | @unlink($_filepath); |
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73 | } |
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74 | // rename tmp file |
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75 | $success = @rename($_tmp_file, $_filepath); |
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76 | } else { |
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77 | // rename tmp file |
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78 | $success = @rename($_tmp_file, $_filepath); |
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79 | if (!$success) { |
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80 | // remove original file |
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81 | if (is_file($_filepath)) { |
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82 | @unlink($_filepath); |
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83 | } |
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84 | // rename tmp file |
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85 | $success = @rename($_tmp_file, $_filepath); |
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86 | } |
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87 | } |
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88 | if (!$success) { |
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89 | error_reporting($_error_reporting); |
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90 | throw new SmartyException("unable to write file {$_filepath}"); |
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91 | } |
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92 | if ($_file_perms !== null) { |
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93 | // set file permissions |
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94 | chmod($_filepath, $_file_perms); |
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95 | umask($old_umask); |
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96 | } |
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97 | error_reporting($_error_reporting); |
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98 | return true; |
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99 | } |
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100 | } |
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101 |
If you suppress an error, we recommend checking for the error condition explicitly: