* asychronous RTS/DCE/CD notification
@ 2004-03-09 3:53 Jeff
0 siblings, 0 replies; only message in thread
From: Jeff @ 2004-03-09 3:53 UTC (permalink / raw)
To: linux-serial
Is it possible in th Linux serial driver to have the state change of
serial control lines like CD notify a user space app rather then having
to periodically poll?
I have an app that uses select() to wait for input from several
different sources. Now, I also want to know when there is a state change
in CD. Can the serial driver do this on it's on, like say via a /proc
file. Or, do I have to break out of the select() every so ofton and use
ioctl() to test CD's state. God I hate polling.
Jeff
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2004-03-09 3:53 asychronous RTS/DCE/CD notification Jeff
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