Comment 5 for bug 12337

Can you double check what the permissions are for your /dev/ttyS0?

Also - are you using udev or any such thing?

Does this work when you run wvdial as root?

On Wednesday 02 February 2005 05:00, Jérôme Schell wrote:
> I confirm this bug.
>
> Here is an interesting part of a strace of the execution of wvdial:
>
> ...
> open("/dev/ttyS0", O_RDWR|O_NONBLOCK|O_NOCTTY|O_LARGEFILE) = 4
> fcntl64(4, F_SETFD, FD_CLOEXEC) = 0
> ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 -opost -isig -icanon
> -echo ...}) = 0
> ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 -opost -isig -icanon
> -echo ...}) = 0
> select(5, [4], [], [], {0, 0}) = 0 (Timeout)
> ioctl(4, TIOCGSERIAL, 0xbfffe4a0) = 0
> ioctl(4, TIOCSSERIAL, 0xbfffe460) = -1 EPERM (Operation not
> permitted) ioctl(4, TCFLSH, 0x2) = 0
> ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 -opost -isig -icanon
> -echo ...}) = 0
> ioctl(4, SNDCTL_TMR_START or TCSETS, {B38400 -opost -isig -icanon -echo
> ...}) = 0
> ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 -opost -isig -icanon
> -echo ...}) = 0
> close(4) = 0
> write(3, "--> ", 4--> ) = 4
> write(3, "Cannot open /dev/ttyS0: Cannot s"..., 63Cannot open
> /dev/ttyS0: Cannot set information for serial port.) = 63write(3, "\n", 1
> ) = 1
> unlink("/var/lock/LCK..ttyS0") = 0
> ....
>
> So this seems to fail during an ioctl call giving an EPERM result.
>
> (just to clarify, my user is part of dialout group so no problem of
> access permission to /dev/ttyS0)