Wanted: second opinion on /etc/getty core dumps
Arthur David Olson
ado at elsie.UUCP
Wed Sep 10 11:18:59 AEST 1986
I've been discovering core dumps in / from /etc/getty on our 4.1BSD
system of late. Always caused by SIGQUIT. My first look at "init.c"
and "getty.c" leads me to believe that there's a window of vulnerability
between
the time a line is opened
and
the time the line is put into raw mode
where a quit character received on the line would indeed cause getty
(which doesn't do anything with QUIT signals) to dump core. A look at
System V also seems to show the same window (though on System V the
window is entirely in getty itself, which has the responsibility for
opening the line).
While this is not a major problem--init just starts getty up again--
I'm tempted to have getty ignore QUIT signals to avoid getting the core
dumps (to avoid the possibility of overwriting some more useful core dump).
Are there any second opinions on doing this?
If so, please mail them to me. Thanks.
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