tti and IOCTL_OPEN


I came to know that serial driver can pass multiple data by some other way
than tti. But, we can’t find in the source that we have. Can anyone from QNX
confirm this?

I have another question regarding IOCTL_OPEN from Ctrl. Is it possible to
wait during this ioctl by some way and get some waking mechanism so that the
driver can fail or succeed the request that depends on other devices? [We
have some workaround for this but looking for some solution that is best for
the situation.]