DTR doesn't drop

[Bertil]

I establish a SLIP connection by running "slattach" (slattach +c +v +mtu 552 /dev/tty1a rmt1 site1 9600 &).

When session is over, process is stopped by using "kill".

Process is stopped but sometimes DTR on tty1a stays on. The only way I have found to drop DTR is to run:
cu -l tty1a dir
~.[rmt1]

Is there a simpler way to make sure that DTR always drops when process is killed??

 

[Gafling]

You may want to review the 'ttydef' used by the port ...

 

[stanhubble]

Not sure which version you are running but...

on 5.0.5

try using the +f option to enable hardware flow on the slattach command. or use the tty1A device.

 

[Bertil]

I do not have the file "ttydef". I am using Open Desktop 3.2 v 4.2. Maybe "/etc/gettydefs" is the file I should examine?
Any idea which parameter affects DTR??

 

[stanhubble]

ok on 3.2.4.2 slattach does not have the +f option so,
use the tty1A device.
^

 

[Gafling]

My mistake about 'ttydefs'. The file to review is '/etc/gettydefs'. Some options to review are:
- hupcl: hang up on logout
- clocal: modem control that also implies half-duplex mode

You may want to include a 'disable' command in your script. The 'enable/disable' commands toggle DTR, DSR, and RTS. My 'tty2a' port responds this way;
- after a 'diasable': 4(RTS) high, 6(DSR) low, 20(DTR) high
- after an 'enable': 4(RTS) low, 6(DSR) high, 20(DTR) low