Re: Problem in cooperation between gnokii and gsmlib

[BORBELY Zoltan]

Hi,

On Thu, Jul 08, 2004 at 10:11:26PM +0200, Libor Chocholaty wrote:
> I would like to use gnokiid in cooperation with gsmlib, but gsmlib 
> trying to reset modem by following ioctl calls:
>   // toggle DTR to reset modem
>   int mctl = TIOCM_DTR;
>   if (ioctl(_fd, TIOCMBIC, &mctl) < 0)
>     throwModemException(_("clearing DTR failed"));
>   // the waiting time for DTR toggling is increased with each loop
>   usleep(holdoff[initTries]);
>   if (ioctl(_fd, TIOCMBIS, &mctl) < 0)
>     throwModemException(_("setting DTR failed"));
> 
> But the first ioctl call fails. I found three posible sources of 
> problems: gnokiid, gsmlib, Linux kernel. I tried kernels 2.4.22, 2.6.5 
> and 2.6.7 with same results.
> 
> # ./gsmctl -d /dev/gnokii -o BATT
> lt-gsmctl[ERROR]: clearing DTR failed (errno: 22/Invalid argument)
> #
> 
> Do anybody know, how to use gnokiid and gsmlib together?

I think you cannot control the modem control lines of the pseudo terminals
(/dev/gnokii is a symlink to a pseudo terminal). You can check it yourself
if you issue "strace ./gsmctl -d /dev/gnokii -o BATT".

Bye,
Bozo