4.2 kill init question
Stephen J. Hartley
hartley at uvm-cs.UUCP
Thu Jan 31 09:31:08 AEST 1985
Our dial-in modems hang occasionally when users run background jobs without
redirecting stdin, stdout, and stderr. We are running 4.2 BSD. I got tired
of unhanging them by hand so I wrote the following shell script to do exactly
what I was doing manually after su-ing to root. This script would be called
by cron several times a day. The problem is that the script would log people
off! For some reason the "kill -HUP 1" seems to work differently in the script
than it does manually. Does anybody know what might be happening? Thanks.
#! /bin/csh -f
# unhang dial-in lines
set path=(/bin /usr/bin /usr/ucb /etc)
setenv PATH /bin:/usr/bin:/usr/ucb:/etc
cd /dev
foreach i (`ls ttyd*`)
set HERE=`w | grep -c $i`
if ($HERE == 0) then
echo "unhang $i" >/dev/console
echo "unhang $i"
ed /etc/ttys <<DONE1
/$i/s/13/03/p
w
q
DONE1
kill -HUP 1
ed /etc/ttys <<DONE2
/$i/s/03/13/p
w
q
DONE2
kill -HUP 1
endif
end
--
"If that's true, then I'm the Pope!" Stephen J. Hartley
USENET: decvax!dartvax!uvm-gen!uvm-cs!hartley The University of Vermont
CSNET: hartley%uvm at csnet-relay (802) 656-3330
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