From: utzoo!decvax!cca!perry.gatech@Udel-Relay@sri-unix Newsgroups: net.unix-wizards Title: Re: getty.c Article-I.D.: sri-unix.3274 Posted: Tue Sep 14 17:47:51 1982 Received: Thu Sep 16 01:12:48 1982 From: Perry FlinnDate: 10 Sep 82 17:13:19-EDT (Fri) Regarding Andy Tannenbaum's message of 27 Aug 82: In order to get a dialup line to hangup on logging out someone has to issue the TICOHPCL ioctl code for the line. This can be done by getty or by login (the latter might be preferable since there is already special-case code there for dialup lines). It is my impression, though I haven't taken the time to verify it, that once this has been done for a particular line, it remains in effect for that line forever; there is no corresponding ioctl command to disable the feature. This may account for the inconsistent behavior mentioned. An alternate solution is to modify the device driver to enable the HUPCLS feature by default. In fact, the dz driver in 4.1bsd contains a line in the dzopen() function to do just that, though the line is commented out. (Another curiosity!) Of course, it is presumed that the cable running from the distribution panel to the modem actually carries the modem control signals (DTR in particular) and that they are not simply jumpered in the connectors.