tools/netconsole: make a bit more robust

The netcat utility likes to exit when it receives an empty packet (as it
thinks this means EOF).  This can easily occur when working with command
line editing as this behavior will be triggered when using backspace.  Or
with tabs and command line completion.  So create two netcat processes -
one to only listen (and put it into a loop), and one to do the sending.
Once the user quits the transmitting netcat, the listening one will be
killed automatically.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2009-09-09 12:20:20 -04:00 committed by Wolfgang Denk
parent a6e19d69f6
commit 770931805d
1 changed files with 9 additions and 3 deletions

View File

@ -31,12 +31,18 @@ if [ -z "${ip}" ] || [ -n "$3" ] ; then
fi fi
for nc in netcat nc ; do for nc in netcat nc ; do
type ${nc} >/dev/null && break type ${nc} >/dev/null 2>&1 && break
done done
trap "stty icanon echo intr ^C" 0 2 3 5 10 13 15 trap "stty icanon echo intr ^C" 0 2 3 5 10 13 15
echo "NOTE: the interrupt signal (normally ^C) has been remapped to ^T" echo "NOTE: the interrupt signal (normally ^C) has been remapped to ^T"
stty -icanon -echo intr ^T stty -icanon -echo intr ^T
${nc} -u -l -p ${port} < /dev/null & (
exec ${nc} -u ${ip} ${port} while ${nc} -u -l -p ${port} < /dev/null ; do
:
done
) &
pid=$!
${nc} -u ${ip} ${port}
kill ${pid} 2>/dev/null