Date: Tue, 4 Jun 1996 22:10:02 -0500 From: David Kelly <dkelly@hiwaay.net> To: questions@freefall.freebsd.org Subject: couldn't kill -9 kermit Message-ID: <v03006f08adda94218d93@[206.104.22.178]>
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While messing around with kermit and serial ports I managed to get kermit
hung where I can't kill -9 it or nothing.
nexgen: {471} ps -l
UID PID PPID CPU PRI NI VSZ RSS WCHAN STAT TT TIME COMMAND
1131 26317 26316 0 18 0 524 392 pause Is p0 0:00.44 -csh (csh)
1131 22837 1 0 4 0 744 868 ttywai IE p1- 0:04.42 kermit -l /d
1131 26353 26352 0 18 0 524 388 pause Ss p1 0:00.40 -csh (csh)
1131 26364 26353 2 28 0 448 264 - R+ p1 0:00.01 ps -l
nexgen: {472}
The full kermit command was "kermit -l /dev/ttyd3". As I said, was messing
around, probably typed "set flow cts", and maybe other things.
So now as I write, I've managed to kill the stuck kermit by finding a
different RS-232 device to plug into the cable, and cycle the handshake
lines. I think when my new device toggled CTS (pin 5) kermit finally quit.
It doesn't seem right that a process could block on ttywait and be immune
to kill -9. Could probably repeat this situation if it would help. Its
likely I didn't originally have a device on the serial cable when I was
playing with kermit.
--
David Kelly N4HHE, n4hhe@amsat.org, dkelly@hiwaay.net
=============================================================
To invent, you need a good imagination and a pile of junk.
- Thomas Edison
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