1: <?php
  2: /**
  3:  * This file contains various helper functions to read specific values needed for setup checks.
  4:  *
  5:  * @package    Setup
  6:  * @subpackage Helper_Filesystem
  7:  * @author     Unknown
  8:  * @copyright  four for business AG <www.4fb.de>
  9:  * @license    http://www.contenido.org/license/LIZENZ.txt
 10:  * @link       http://www.4fb.de
 11:  * @link       http://www.contenido.org
 12:  */
 13: 
 14: defined('CON_FRAMEWORK') || die('Illegal call: Missing framework initialization - request aborted.');
 15: 
 16: define('CON_PREDICT_SUFFICIENT', 1);
 17: 
 18: define('CON_PREDICT_NOTPREDICTABLE', 2);
 19: 
 20: define('CON_PREDICT_CHANGEPERM_SAMEOWNER', 3);
 21: 
 22: define('CON_PREDICT_CHANGEPERM_SAMEGROUP', 4);
 23: 
 24: define('CON_PREDICT_CHANGEPERM_OTHERS', 5);
 25: 
 26: define('CON_PREDICT_CHANGEUSER', 6);
 27: 
 28: define('CON_PREDICT_CHANGEGROUP', 7);
 29: 
 30: define('CON_PREDICT_WINDOWS', 8);
 31: 
 32: define('CON_BASEDIR_NORESTRICTION', 1);
 33: 
 34: define('CON_BASEDIR_DOTRESTRICTION', 2);
 35: 
 36: define('CON_BASEDIR_RESTRICTIONSUFFICIENT', 3);
 37: 
 38: define('CON_BASEDIR_INCOMPATIBLE', 4);
 39: 
 40: function canWriteFile($filename) {
 41:     clearstatcache();
 42:     if (is_file($filename)) {
 43:         return is_writable($filename);
 44:     } else {
 45:         return is_writable(dirname($filename));
 46:     }
 47: }
 48: 
 49: function canWriteDir($dirname) {
 50:     clearstatcache();
 51:     return is_dir($dirname) && is_writable($dirname);
 52: }
 53: 
 54: function getFileInfo($sFilename) {
 55:     if (!cFileHandler::exists($sFilename)) {
 56:         return false;
 57:     }
 58: 
 59:     $oiFilePermissions = fileperms($sFilename);
 60:     if ($oiFilePermissions === false) {
 61:         return false;
 62:     }
 63: 
 64:     switch (true) {
 65:         case (($oiFilePermissions & 0xC000) == 0xC000):
 66:             $info = 's';
 67:             $type = "socket";
 68:             break;
 69:         case (($oiFilePermissions & 0xA000) == 0xA000):
 70:             $info = 'l';
 71:             $type = "symbolic link";
 72:             break;
 73:         case (($oiFilePermissions & 0x8000) == 0x8000):
 74:             $info = '-';
 75:             $type = "regular file";
 76:             break;
 77:         case (($oiFilePermissions & 0x6000) == 0x6000):
 78:             $info = 'b';
 79:             $type = "block special";
 80:             break;
 81:         case (($oiFilePermissions & 0x4000) == 0x4000):
 82:             $info = 'd';
 83:             $type = "directory";
 84:             break;
 85:         case (($oiFilePermissions & 0x2000) == 0x2000):
 86:             $info = 'c';
 87:             $type = "character special";
 88:             break;
 89:         case (($oiFilePermissions & 0x1000) == 0x1000):
 90:             $info = 'p';
 91:             $type = "FIFO pipe";
 92:             break;
 93:         default:
 94:             $info = "u";
 95:             $type = "Unknown";
 96:             break;
 97:     }
 98: 
 99:     $aFileinfo = array();
100:     $aFileinfo["info"] = $info;
101:     $aFileinfo["type"] = $type;
102:     $aFileinfo["owner"]["read"] = ($oiFilePermissions & 0x0100) ? true : false;
103:     $aFileinfo["owner"]["write"] = ($oiFilePermissions & 0x0080) ? true : false;
104:     $aFileinfo["group"]["read"] = ($oiFilePermissions & 0x0020) ? true : false;
105:     $aFileinfo["group"]["write"] = ($oiFilePermissions & 0x0010) ? true : false;
106:     $aFileinfo["others"]["read"] = ($oiFilePermissions & 0x0004) ? true : false;
107:     $aFileinfo["others"]["write"] = ($oiFilePermissions & 0x0002) ? true : false;
108:     $aFileinfo["owner"]["id"] = fileowner($sFilename);
109:     $aFileinfo["group"]["id"] = filegroup($sFilename);
110:     return ($aFileinfo);
111: }
112: 
113: function checkOpenBasedirCompatibility() {
114:     $value = getPHPIniSetting("open_basedir");
115: 
116:     if (isWindows()) {
117:         $aBasedirEntries = explode(";", $value);
118:     } else {
119:         $aBasedirEntries = explode(":", $value);
120:     }
121: 
122:     if (count($aBasedirEntries) == 1 && $aBasedirEntries[0] == $value) {
123:         return CON_BASEDIR_NORESTRICTION;
124:     }
125: 
126:     if (in_array(".", $aBasedirEntries) && count($aBasedirEntries) == 1) {
127:         return CON_BASEDIR_DOTRESTRICTION;
128:     }
129: 
130:     $sCurrentDirectory = getcwd();
131: 
132:     foreach ($aBasedirEntries as $entry) {
133:         if (stristr($sCurrentDirectory, $entry)) {
134:             return CON_BASEDIR_RESTRICTIONSUFFICIENT;
135:         }
136:     }
137: 
138:     return CON_BASEDIR_INCOMPATIBLE;
139: }
140: 
141: function predictCorrectFilepermissions($file) {
142:     // Check if the system is a windows system. If yes, we can't predict
143:     // anything.
144:     if (isWindows()) {
145:         return CON_PREDICT_WINDOWS;
146:     }
147: 
148:     // Check if the file is read- and writeable. If yes, we don't need to do any
149:     // further checks.
150:     if (is_writable($file) && is_readable($file)) {
151:         return CON_PREDICT_SUFFICIENT;
152:     }
153: 
154:     // If we can't find out the web server UID, we cannot predict the correct
155:     // mask.
156:     $iServerUID = getServerUID();
157:     if ($iServerUID === false) {
158:         return CON_PREDICT_NOTPREDICTABLE;
159:     }
160: 
161:     // If we can't find out the web server GID, we cannot predict the correct
162:     // mask.
163:     $iServerGID = getServerGID();
164:     if ($iServerGID === false) {
165:         return CON_PREDICT_NOTPREDICTABLE;
166:     }
167: 
168:     $aFilePermissions = getFileInfo($file);
169: 
170:     if (getSafeModeStatus()) {
171:         // SAFE-Mode related checks
172:         if ($iServerUID == $aFilePermissions["owner"]["id"]) {
173:             return CON_PREDICT_CHANGEPERM_SAMEOWNER;
174:         }
175: 
176:         if (getSafeModeGidStatus()) {
177:             // SAFE-Mode GID related checks
178:             if ($iServerGID == $aFilePermissions["group"]["id"]) {
179:                 return CON_PREDICT_CHANGEPERM_SAMEGROUP;
180:             }
181: 
182:             return CON_PREDICT_CHANGEGROUP;
183:         }
184:     } else {
185:         // Regular checks
186:         if ($iServerUID == $aFilePermissions["owner"]["id"]) {
187:             return CON_PREDICT_CHANGEPERM_SAMEOWNER;
188:         }
189: 
190:         if ($iServerGID == $aFilePermissions["group"]["id"]) {
191:             return CON_PREDICT_CHANGEPERM_SAMEGROUP;
192:         }
193: 
194:         return CON_PREDICT_CHANGEPERM_OTHERS;
195:     }
196: 
197:     return CON_PREDICT_NOTPREDICTABLE;
198: }