woods@eci386.uucp (Greg A. Woods) (12/11/90)
In article <1990Dec9.020043.273@cbnewsm.att.com> abm@cbnewsm.att.com (andrew.b.myers) writes: >[ ... setting up a restricted bbs-like account on a 3B2/300 ... ] > > So now I need an instantaneous sledge hammer to kill the abandoned > shell when a user suddenly drops off. The sledge hammer you are looking for is called MODEM CONTROL. In conjunction with the HUPCL flag (i.e. stty hupcl, or HUPCL in gettydefs), modem control does everything you want it to. Make sure your modem is supplying a DCD signal that follows the true carrier (by setting the right options/switches), and that HUPCL is specified in all of the gettydefs lines for the port your modem is connected to. Needless to say, use the proper RJ-45 -> DB-25 adapter too (i.e. an "005" modem connector). Warning: If you are using this modem bi-directionally, i.e. you call out on it too, make sure you are running SysVr3.2, since the older BNU's don't support modem control properly (i.e. they didn't really support bi-directional modems, regardless of the presence of uugetty). Also, please be forewarned: unless you have a carefully selected set of commands available to rsh in a chroot'ed area, there is a 99.9% chance that someone can find a way out of the restricted environment. -- Greg A. Woods woods@{eci386,gate,robohack,ontmoh,tmsoft}.UUCP ECI and UniForum Canada +1-416-443-1734 [h] +1-416-595-5425 [w] VE3TCP Toronto, Ontario CANADA Political speech and writing are largely the defense of the indefensible-ORWELL