silverstripe-environmentcheck/code/checks/FileWriteableCheck.php
2013-01-09 18:59:21 +01:00

58 lines
2.2 KiB
PHP

<?php
/**
* Check that the given file is writeable.
* This can be used to check that the environment doesn't have permission set-up errors.
* @param $path The full path. If a relative path, it will relative to the BASE_PATH
*/
class FileWriteableCheck implements EnvironmentCheck {
protected $path;
function __construct($path) {
$this->path = $path;
}
function check() {
if($this->path[0] == '/') $filename = $this->path;
else $filename = BASE_PATH . DIRECTORY_SEPARATOR . str_replace('/', DIRECTORY_SEPARATOR, $this->path);
if(file_exists($filename)) $isWriteable = is_writeable($filename);
else $isWriteable = is_writeable(dirname($filename));
if(!$isWriteable) {
if(function_exists('posix_getgroups')) {
$userID = posix_geteuid();
$user = posix_getpwuid($userID);
$currentOwnerID = fileowner(file_exists($filename) ? $filename : dirname($filename) );
$currentOwner = posix_getpwuid($currentOwnerID);
$message = "User '$user[name]' needs to be able to write to this file:\n$filename\n\nThe file is currently owned by '$currentOwner[name]'. ";
if($user['name'] == $currentOwner['name']) {
$message .= "We recommend that you make the file writeable.";
} else {
$groups = posix_getgroups();
$groupList = array();
foreach($groups as $group) {
$groupInfo = posix_getgrgid($group);
if(in_array($currentOwner['name'], $groupInfo['members'])) $groupList[] = $groupInfo['name'];
}
if($groupList) {
$message .= " We recommend that you make the file group-writeable and change the group to one of these groups:\n - ". implode("\n - ", $groupList)
. "\n\nFor example:\nchmod g+w $filename\nchgrp " . $groupList[0] . " $filename";
} else {
$message .= " There is no user-group that contains both the web-server user and the owner of this file. Change the ownership of the file, create a new group, or temporarily make the file writeable by everyone during the install process.";
}
}
} else {
$message = "The webserver user needs to be able to write to this file:\n$filename";
}
return array(EnvironmentCheck::ERROR, $message);
}
return array(EnvironmentCheck::OK,'');
}
}