mlg@ipms.UUCP (Mike Greenberg) (08/14/84)
Thanks to all of those who responed...There are several
reasons a line is not always hung up, and several possible
solutions:
Reasons for not hanging up:
- A process unset the hangup on close bit via. ioctl
- All process attached to the terminal are not dead
when the logout occured
- DTR was not dropped long enough for the modem to hang up.
(A DF03 requires 1.5 seconds)
Possible solutions:
- Modify init and/or getty to drop DTR for a while
- Modify vhangup() system call
- Put sleep() at strategic places in getty and ioctl
- Modify the shell to drop DTR for a few seconds when
a person does a logout.
Implemented solution:
- I modified the shell to drop DTR for 3 seconds
after a logout. Lets here it for yet another
hack...
- I could not properly modify init or getty to do the right
thing. The closest I got was to have init drop DTR on a line
several seconds after you connected (not very usefull)
Thanks again for all of the help...Please do not comment on this
topic to either net.unix-wizards or to me via. mail.
(I'd hate to see four months of discussion about this...)
--
Mike Greenberg USENET: ..decvax!sultan!ipms!mlg
Digital Equipment Corp. ARPA: ipms!mlg@cmu-ri-isl ENET: cdr::greenberg