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Message-Id: <199512170029.CAA04377@dog>
Date: Sun, 17 Dec 1995 02:29:19 +0200
From: Dmitry Kohmanyuk <dk@dog.farm.org>
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Subject: kern/897: cannot watch the slattach'ed tty
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>Number:         897
>Category:       kern
>Synopsis:       cannot watch(1) the slattach(1)'ed tty
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Dec 16 17:10:01 PST 1995
>Last-Modified:
>Originator:     Dmitry Kohmanyuk
>Organization:
FARM Computing Association
>Release:        FreeBSD 2.0-BUILT-19950603 i386
>Environment:

	

uname -a:
FreeBSD dog.farm.org 2.0.5-RELEASE FreeBSD 2.0.5-RELEASE #20: Sat Dec  2 14:58:22 EET 1995     dk@dog.farm.org:/usr/src/sys/compile/FARM  i386

	V.32bis external modem.
	PCI board, ISA serial card, no FIFO.
	real SLIP connection (no slip emulator)

>Description:

	

the watch(1) over a line used by slattach cannot be run; syslog diagnostics:

Dec 17 02:19:27 dog /kernel: Snoop: bad attached tty data.


>How-To-Repeat:

	

# script to start slip:
HOST=monolit
PORT=/dev/cuaa1
export HOST PORT

slattach -c -h -s 38400 -z -r "/etc/slip/slipchat $PORT $HOST" \
	 $PORT 

# slipchat script:
# usage: $0 port host
port=$1
host=$2
logger -t slipchat -p kern.notice slipchat to $host on $port

iport=`echo $port | sed -e 's/\([a-z][0-9]*\)$/i\1/'`
stty <$iport cs8 -istrip -parenb cread crtscts
chat -v -f /etc/slip/chat/$host <$port >$port && \
 /etc/slip/config/$host 0 0 

# chat script:
(not shown, hopefully irrelevant)

# slip/config script:
:
# called as: $0 old-sl# new-sl#
#SRC=193.124.54.195
#DEST=193.124.54.227
SRC=193.124.48.230
DEST=193.124.48.241
NETMASK=0xffffffe0
logger -p kern.notice -t slip-config "slip sl$1 connected ($SRC -> $DEST)"
ifconfig sl$1 down
ifconfig sl$2 inet $SRC $DEST netmask $NETMASK
ifconfig sl$2 up
route add default $DEST

>Fix:
	
	I don't know.
	

>Audit-Trail:
>Unformatted: