[ale] ttyS0

Joe Steele joe at madewell.com
Wed May 23 16:49:40 EDT 2001


What's the status of CLOCAL in the terminal control flags?  
If set, the modem control lines would be ignored.

Is the open returning successfully, or with an error?  
If there's an error, what is it?

(Of course, to state the really obvious, setting the O_NONBLOCK 
flag when opening would cause it.)

--Joe

-----Original Message-----
From:	Chris Fowler [SMTP:ChrisF at computone.com]
Sent:	Wednesday, May 23, 2001 1:07 PM
To:	'ale at ale.org'
Subject:	[ale] ttyS0

Whay is it that when I open ttyS0 in Linux and nothing is attached to that
port the open() does not block.  Should it block if CD is low?

Chris

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