A4GL_file fclose A4GL_file feof A4GL_file ferror A4GL_file fgets A4GL_file fgetc A4GL_file fputs A4GL_file fopen A4GL_file fseek A4GL_file fseek_from_end A4GL_file fsize A4GL_file ftell A4GL_file popen A4GL_file pclose A4GL_file rewind A4GL_file opendir A4GL_file readdir A4GL_file closedir