Re: Console driver behaviour?

[James Simmons]

> How can I determine that the program is run via ssh or on
> a headless box?

Hm. I never seen a clean way to do this :-( 

> The problem is with Linux Console Tools. It tries opening 
> /dev/tty, /dev/tty0 and /dev/console respectively upon the 
> start, and it fails on ssh'ed or headless boxes. Is there 
> any way to catch the situation? I've thought that open should
> return ENODEV in these cases, but it doesn't..

/dev/console -> System console. printk messages are sent to these devices.
 		It is always there.

/dev/tty     -> The TTY device associated with the current process 

/dev/tty0    -> Only related to VTs. This is the foreground virtual 
		termial (made from a graphics card and a regular keyboard)