Question

I’m running PHP 5.3.5-1ubuntu7.2 (with safe_mode = Off) and I’m unable to correctly set the mode for any file or directory from within a PHP script, I coded the following test (just to make sure):

$result = array();

if (mkdir('./I/do/not/exist/', 0777, true) === true)
{
    $result['./I/'] = sprintf('%s (%s)', getFileOwner('./I/'), getFilePermissions('./I/'));
    $result['./I/do/'] = sprintf('%s (%s)', getFileOwner('./I/do/'), getFilePermissions('./I/do/'));
    $result['./I/do/not/'] = sprintf('%s (%s)', getFileOwner('./I/do/not/'), getFilePermissions('./I/do/not/'));
    $result['./I/do/not/exist/'] = sprintf('%s (%s)', getFileOwner('./I/do/not/exist/'), getFilePermissions('./I/do/not/exist/'));
    $result[__DIR__] = sprintf('%s (%s)', getFileOwner(__DIR__), getFilePermissions(__DIR__));
    $result[__FILE__] = sprintf('%s (%s)', getFileOwner(__FILE__), getFilePermissions(__FILE__));
}

echo '<pre>';
print_r($result);
echo '</pre>';

function getFileOwner($path)
{
    $user = posix_getpwuid(fileowner($path));
    $group = posix_getgrgid(filegroup($path));

    return implode(':', array($user['name'], $group['name']));
}

function getFilePermissions($path)
{
    return substr(sprintf('%o', fileperms($path)), -4);
}

And this is the output:

Array
(
    [./I/] => www-data:www-data (0755)
    [./I/do/] => www-data:www-data (0755)
    [./I/do/not/] => www-data:www-data (0755)
    [./I/do/not/exist/] => www-data:www-data (0755)
    [/home/alix/Server/_] => alix:alix (0777)
    [/home/alix/Server/_/chmod.php] => alix:alix (0644)
)

Why do none of the (sub-)folders of ./I/do/not/exist/ get the specified (0777) permissions?

Answer 1

You may have to clear the umask first before creating the directory. However it is recommended to adjust the permissions using chmod instead of relying on umask.