access to RS-232 signals from user-space?

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Hi all,

I have successfully run a SLIP link between two machines over their
serial ports. We now want to replace the null-modem cable with a radio
at each end connected to the serial port. We also want the ability to
"drive" the radio i.e. use flow-control based on the modem signals on
the radio.

Can anyone enlighten me about the facilities offered by the kernel to
control the various RS-232 lines from kernel-space or user-space? Any
pointers would be helpful.

Regards,
Amit


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