svp7524@hertz.njit.edu (sitaram puranam csd) (11/18/89)
Hai
Recently i come across this problem on our HP 835 running hp-ux 3.1.
I configured a remote printer on our system and i picked the printer device
as one of unused ttys. Well,without checking /etc/devices file and i
configured the printer and the device as /dev/tty10p1. when i tried to
print, it crashed the system. i rebooted the system, and when it tried to
start lp daemon from rc file, it crashed again. After couple of tries i hit
a control c, just before to start lp daemon. Then it came up without any
problems. Later i checked the devices file and i realized that those ttys
aren't configured. I modified the printer configuration and its fine.
I got the real problem later!!. One of the guys just did
"cat testfile >/dev/tty10p1" as a normal user. Thats all was needed to kill
the system. Now i removed the write permissions for those nonconfigured ttys.
But it's kind of surprise to me why should this kill the system. Any suggetions or comments ??
Sitaram Puranam
sram@{mars,eies2,wilbur}.njit.edu
sram@ciathp@njitgw.njit.edu