Question on tty line discipline

[Christopher Meller]

Hi,

I have a question concerning the line discipline behaviour for serial
devices.
When the line discipline is set via ioctl from  user space to e.g. N_PPP and the userspace program returns without resetting  the line discipline back to N_TTY, the serial device cannot be used (ENODV) until an appropriate  ioctl (to N_TTY) is performed. Is there any reason for the fact that the line discipline is not reset by the kernel , when closing the device. 

Could you please CC me on answers and comments ?


Kind regards,

Christopher Meller



-- 
Christopher Meller
Software engineer

Innominate Security Technologies AG
protecting industrial networks
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