'Parse line received as command line input and return first filename
together with the remaining line.
@param line: Arguments received from command line input.
@type line: L{str}
@return: Tupple with filename and rest. Return empty values when no path was not found.
@rtype: C{tupple}'

def _getFilename(self, line):

    line = line.strip()
    if (not line):
        return ('', '')
    if (line[0] in '\'"'):
        ret = []
        line = list(line)
        try:
            for i in range(1, len(line)):
                c = line[i]
                if (c == line[0]):
                    return (''.join(ret), ''.join(line[(i + 1):]).lstrip())
                elif (c == '\\'):
                    del line[i]
                    if (line[i] not in '\'"\\'):
                        raise IndexError(('bad    quote:    \\%s' % (line[i],)))
                    ret.append(line[i])
                else:
                    ret.append(line[i])
        except IndexError:
            raise IndexError('unterminated    quote')
    ret = line.split(None, 1)
    if (len(ret) == 1):
        return (ret[0], '')
    else:
        return (ret[0], ret[1])
