TYPO3.Flow

It is not a problem of FLOW3, it is a problem of your webserver setup.

FLOW3 uses the temp directory, which is set in the server configuration. (check Classes/Utility/T3_FLOW3_Utility_Environment.php line 266 ff.)

The user running PHP (normaly the webserver user like wwwrun) has to be allowed to create files and directories in the temp-directory.

Check your webserver configuration and especially the configuration of php.ini

argh, i should read texts completely. forget my stupid stuff above.

@robert
U should really think about dedicated temporary directories. at least for the CLI requests. i think the cli feature will be a often used feature later for scripts or connectors to other software on the same server. perhaps you can divide that into reading and writing requests... or divide into writing requests to FileCache (the webserver requests are working there also on the same dirs/files) and requests to PHP temporary directory (CLI/webserver requests need to work there for themselves and don't have to access the other dirs/files, or not?)

Or:
make a rule that all CLI requests will be called like this:

su - <webserveruser> -c "php index.php <...>" 

I think there will be a big amount of users, who dont have any access to the CLI (so all requests are handled by the webserver user) and a big amount of users, who own a own server with root access (so above trick works). the ones who have limited ssh / shell access to their webspace won't be much i think.

Or i am talking senseless stuff here because of thinking in the wrong direction, then just ignore me :)

Close to solved ;-)

the generated directory /tmp/FLOW3 had 755 mode and were owned by the user whoever called index.php first.
So I was still not able to create subdirectories as the other user.

Setting umask to 000 before helped for me

in T3_FLOW3_Utility_Files.php l. 82

/**
 * Creates a directory specified by $path. If the parent directories
 * don't exist yet, they will be created as well.
 *
 * @param string $path: Path to the directory which shall be created
 * @return void
 * @author Robert Lemke <robert@typo3.org>
 * @todo Make mode configurable
     */
    public static function createDirectoryRecursively($path) {
        $directoryNames = explode('/', $path);
        if (!is_array($directoryNames) || count($directoryNames) == 0) throw new InvalidArgumentException('Invalid path "' . $path . '" specified for creating directory recursively.', 1170251395);
        $currentPath = '';
        foreach ($directoryNames as $directoryName) {
            $currentPath .= $directoryName . '/';
            if (!is_dir($currentPath) && T3_PHP6_Functions::strlen($directoryName) > 0) {
                // ++ NEW  NEW  NEW ++     setting umask to zero before
                $oldMask = umask(000);
                mkdir($currentPath, 0777);
                // setting it back
                umask($oldMask);
                if (!is_dir($currentPath)) throw new T3_FLOW3_Utility_Exception('Could not create directory "' . $path . '"!', 1170251400);
            }
        }
    }